/* * Tiny Code Generator for QEMU * * Copyright (c) 2008 Andrzej Zaborowski * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ #include "elf.h" #include "../tcg-ldst.c.inc" #include "../tcg-pool.c.inc" int arm_arch = __ARM_ARCH; #ifndef use_idiv_instructions bool use_idiv_instructions; #endif #ifndef use_neon_instructions bool use_neon_instructions; #endif #ifdef CONFIG_DEBUG_TCG static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { "%r0", "%r1", "%r2", "%r3", "%r4", "%r5", "%r6", "%r7", "%r8", "%r9", "%r10", "%r11", "%r12", "%sp", "%r14", "%pc", "%q0", "%q1", "%q2", "%q3", "%q4", "%q5", "%q6", "%q7", "%q8", "%q9", "%q10", "%q11", "%q12", "%q13", "%q14", "%q15", }; #endif static const int tcg_target_reg_alloc_order[] = { TCG_REG_R4, TCG_REG_R5, TCG_REG_R6, TCG_REG_R7, TCG_REG_R8, TCG_REG_R9, TCG_REG_R10, TCG_REG_R11, TCG_REG_R13, TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3, TCG_REG_R12, TCG_REG_R14, TCG_REG_Q0, TCG_REG_Q1, TCG_REG_Q2, TCG_REG_Q3, /* Q4 - Q7 are call-saved, and skipped. */ TCG_REG_Q8, TCG_REG_Q9, TCG_REG_Q10, TCG_REG_Q11, TCG_REG_Q12, TCG_REG_Q13, TCG_REG_Q14, TCG_REG_Q15, }; static const int tcg_target_call_iarg_regs[4] = { TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3 }; static TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot) { tcg_debug_assert(kind == TCG_CALL_RET_NORMAL); tcg_debug_assert(slot >= 0 && slot <= 3); return TCG_REG_R0 + slot; } #define TCG_REG_TMP TCG_REG_R12 #define TCG_VEC_TMP TCG_REG_Q15 #ifndef CONFIG_SOFTMMU #define TCG_REG_GUEST_BASE TCG_REG_R11 #endif typedef enum { COND_EQ = 0x0, COND_NE = 0x1, COND_CS = 0x2, /* Unsigned greater or equal */ COND_CC = 0x3, /* Unsigned less than */ COND_MI = 0x4, /* Negative */ COND_PL = 0x5, /* Zero or greater */ COND_VS = 0x6, /* Overflow */ COND_VC = 0x7, /* No overflow */ COND_HI = 0x8, /* Unsigned greater than */ COND_LS = 0x9, /* Unsigned less or equal */ COND_GE = 0xa, COND_LT = 0xb, COND_GT = 0xc, COND_LE = 0xd, COND_AL = 0xe, } ARMCond; #define TO_CPSR (1 << 20) #define SHIFT_IMM_LSL(im) (((im) << 7) | 0x00) #define SHIFT_IMM_LSR(im) (((im) << 7) | 0x20) #define SHIFT_IMM_ASR(im) (((im) << 7) | 0x40) #define SHIFT_IMM_ROR(im) (((im) << 7) | 0x60) #define SHIFT_REG_LSL(rs) (((rs) << 8) | 0x10) #define SHIFT_REG_LSR(rs) (((rs) << 8) | 0x30) #define SHIFT_REG_ASR(rs) (((rs) << 8) | 0x50) #define SHIFT_REG_ROR(rs) (((rs) << 8) | 0x70) typedef enum { ARITH_AND = 0x0 << 21, ARITH_EOR = 0x1 << 21, ARITH_SUB = 0x2 << 21, ARITH_RSB = 0x3 << 21, ARITH_ADD = 0x4 << 21, ARITH_ADC = 0x5 << 21, ARITH_SBC = 0x6 << 21, ARITH_RSC = 0x7 << 21, ARITH_TST = 0x8 << 21 | TO_CPSR, ARITH_CMP = 0xa << 21 | TO_CPSR, ARITH_CMN = 0xb << 21 | TO_CPSR, ARITH_ORR = 0xc << 21, ARITH_MOV = 0xd << 21, ARITH_BIC = 0xe << 21, ARITH_MVN = 0xf << 21, INSN_B = 0x0a000000, INSN_CLZ = 0x016f0f10, INSN_RBIT = 0x06ff0f30, INSN_LDMIA = 0x08b00000, INSN_STMDB = 0x09200000, INSN_LDR_IMM = 0x04100000, INSN_LDR_REG = 0x06100000, INSN_STR_IMM = 0x04000000, INSN_STR_REG = 0x06000000, INSN_LDRH_IMM = 0x005000b0, INSN_LDRH_REG = 0x001000b0, INSN_LDRSH_IMM = 0x005000f0, INSN_LDRSH_REG = 0x001000f0, INSN_STRH_IMM = 0x004000b0, INSN_STRH_REG = 0x000000b0, INSN_LDRB_IMM = 0x04500000, INSN_LDRB_REG = 0x06500000, INSN_LDRSB_IMM = 0x005000d0, INSN_LDRSB_REG = 0x001000d0, INSN_STRB_IMM = 0x04400000, INSN_STRB_REG = 0x06400000, INSN_LDRD_IMM = 0x004000d0, INSN_LDRD_REG = 0x000000d0, INSN_STRD_IMM = 0x004000f0, INSN_STRD_REG = 0x000000f0, INSN_DMB_ISH = 0xf57ff05b, INSN_DMB_MCR = 0xee070fba, /* Architected nop introduced in v6k. */ /* ??? This is an MSR (imm) 0,0,0 insn. Anyone know if this also Just So Happened to do nothing on pre-v6k so that we don't need to conditionalize it? */ INSN_NOP_v6k = 0xe320f000, /* Otherwise the assembler uses mov r0,r0 */ INSN_NOP_v4 = (COND_AL << 28) | ARITH_MOV, INSN_VADD = 0xf2000800, INSN_VAND = 0xf2000110, INSN_VBIC = 0xf2100110, INSN_VEOR = 0xf3000110, INSN_VORN = 0xf2300110, INSN_VORR = 0xf2200110, INSN_VSUB = 0xf3000800, INSN_VMUL = 0xf2000910, INSN_VQADD = 0xf2000010, INSN_VQADD_U = 0xf3000010, INSN_VQSUB = 0xf2000210, INSN_VQSUB_U = 0xf3000210, INSN_VMAX = 0xf2000600, INSN_VMAX_U = 0xf3000600, INSN_VMIN = 0xf2000610, INSN_VMIN_U = 0xf3000610, INSN_VABS = 0xf3b10300, INSN_VMVN = 0xf3b00580, INSN_VNEG = 0xf3b10380, INSN_VCEQ0 = 0xf3b10100, INSN_VCGT0 = 0xf3b10000, INSN_VCGE0 = 0xf3b10080, INSN_VCLE0 = 0xf3b10180, INSN_VCLT0 = 0xf3b10200, INSN_VCEQ = 0xf3000810, INSN_VCGE = 0xf2000310, INSN_VCGT = 0xf2000300, INSN_VCGE_U = 0xf3000310, INSN_VCGT_U = 0xf3000300, INSN_VSHLI = 0xf2800510, /* VSHL (immediate) */ INSN_VSARI = 0xf2800010, /* VSHR.S */ INSN_VSHRI = 0xf3800010, /* VSHR.U */ INSN_VSLI = 0xf3800510, INSN_VSHL_S = 0xf2000400, /* VSHL.S (register) */ INSN_VSHL_U = 0xf3000400, /* VSHL.U (register) */ INSN_VBSL = 0xf3100110, INSN_VBIT = 0xf3200110, INSN_VBIF = 0xf3300110, INSN_VTST = 0xf2000810, INSN_VDUP_G = 0xee800b10, /* VDUP (ARM core register) */ INSN_VDUP_S = 0xf3b00c00, /* VDUP (scalar) */ INSN_VLDR_D = 0xed100b00, /* VLDR.64 */ INSN_VLD1 = 0xf4200000, /* VLD1 (multiple single elements) */ INSN_VLD1R = 0xf4a00c00, /* VLD1 (single element to all lanes) */ INSN_VST1 = 0xf4000000, /* VST1 (multiple single elements) */ INSN_VMOVI = 0xf2800010, /* VMOV (immediate) */ } ARMInsn; #define INSN_NOP (use_armv7_instructions ? INSN_NOP_v6k : INSN_NOP_v4) static const uint8_t tcg_cond_to_arm_cond[] = { [TCG_COND_EQ] = COND_EQ, [TCG_COND_NE] = COND_NE, [TCG_COND_LT] = COND_LT, [TCG_COND_GE] = COND_GE, [TCG_COND_LE] = COND_LE, [TCG_COND_GT] = COND_GT, /* unsigned */ [TCG_COND_LTU] = COND_CC, [TCG_COND_GEU] = COND_CS, [TCG_COND_LEU] = COND_LS, [TCG_COND_GTU] = COND_HI, }; static int encode_imm(uint32_t imm); /* TCG private relocation type: add with pc+imm8 */ #define R_ARM_PC8 11 /* TCG private relocation type: vldr with imm8 << 2 */ #define R_ARM_PC11 12 static bool reloc_pc24(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); ptrdiff_t offset = (tcg_ptr_byte_diff(target, src_rx) - 8) >> 2; if (offset == sextract32(offset, 0, 24)) { *src_rw = deposit32(*src_rw, 0, 24, offset); return true; } return false; } static bool reloc_pc13(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); ptrdiff_t offset = tcg_ptr_byte_diff(target, src_rx) - 8; if (offset >= -0xfff && offset <= 0xfff) { tcg_insn_unit insn = *src_rw; bool u = (offset >= 0); if (!u) { offset = -offset; } insn = deposit32(insn, 23, 1, u); insn = deposit32(insn, 0, 12, offset); *src_rw = insn; return true; } return false; } static bool reloc_pc11(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); ptrdiff_t offset = (tcg_ptr_byte_diff(target, src_rx) - 8) / 4; if (offset >= -0xff && offset <= 0xff) { tcg_insn_unit insn = *src_rw; bool u = (offset >= 0); if (!u) { offset = -offset; } insn = deposit32(insn, 23, 1, u); insn = deposit32(insn, 0, 8, offset); *src_rw = insn; return true; } return false; } static bool reloc_pc8(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); ptrdiff_t offset = tcg_ptr_byte_diff(target, src_rx) - 8; int imm12 = encode_imm(offset); if (imm12 >= 0) { *src_rw = deposit32(*src_rw, 0, 12, imm12); return true; } return false; } static bool patch_reloc(tcg_insn_unit *code_ptr, int type, intptr_t value, intptr_t addend) { tcg_debug_assert(addend == 0); switch (type) { case R_ARM_PC24: return reloc_pc24(code_ptr, (const tcg_insn_unit *)value); case R_ARM_PC13: return reloc_pc13(code_ptr, (const tcg_insn_unit *)value); case R_ARM_PC11: return reloc_pc11(code_ptr, (const tcg_insn_unit *)value); case R_ARM_PC8: return reloc_pc8(code_ptr, (const tcg_insn_unit *)value); default: g_assert_not_reached(); } } #define TCG_CT_CONST_ARM 0x100 #define TCG_CT_CONST_INV 0x200 #define TCG_CT_CONST_NEG 0x400 #define TCG_CT_CONST_ZERO 0x800 #define TCG_CT_CONST_ORRI 0x1000 #define TCG_CT_CONST_ANDI 0x2000 #define ALL_GENERAL_REGS 0xffffu #define ALL_VECTOR_REGS 0xffff0000u /* * r0-r2 will be overwritten when reading the tlb entry (softmmu only) * and r0-r1 doing the byte swapping, so don't use these. * r3 is removed for softmmu to avoid clashes with helper arguments. */ #ifdef CONFIG_SOFTMMU #define ALL_QLOAD_REGS \ (ALL_GENERAL_REGS & ~((1 << TCG_REG_R0) | (1 << TCG_REG_R1) | \ (1 << TCG_REG_R2) | (1 << TCG_REG_R3) | \ (1 << TCG_REG_R14))) #define ALL_QSTORE_REGS \ (ALL_GENERAL_REGS & ~((1 << TCG_REG_R0) | (1 << TCG_REG_R1) | \ (1 << TCG_REG_R2) | (1 << TCG_REG_R14) | \ ((TARGET_LONG_BITS == 64) << TCG_REG_R3))) #else #define ALL_QLOAD_REGS ALL_GENERAL_REGS #define ALL_QSTORE_REGS \ (ALL_GENERAL_REGS & ~((1 << TCG_REG_R0) | (1 << TCG_REG_R1))) #endif /* * ARM immediates for ALU instructions are made of an unsigned 8-bit * right-rotated by an even amount between 0 and 30. * * Return < 0 if @imm cannot be encoded, else the entire imm12 field. */ static int encode_imm(uint32_t imm) { uint32_t rot, imm8; /* Simple case, no rotation required. */ if ((imm & ~0xff) == 0) { return imm; } /* Next, try a simple even shift. */ rot = ctz32(imm) & ~1; imm8 = imm >> rot; rot = 32 - rot; if ((imm8 & ~0xff) == 0) { goto found; } /* * Finally, try harder with rotations. * The ctz test above will have taken care of rotates >= 8. */ for (rot = 2; rot < 8; rot += 2) { imm8 = rol32(imm, rot); if ((imm8 & ~0xff) == 0) { goto found; } } /* Fail: imm cannot be encoded. */ return -1; found: /* Note that rot is even, and we discard bit 0 by shifting by 7. */ return rot << 7 | imm8; } static int encode_imm_nofail(uint32_t imm) { int ret = encode_imm(imm); tcg_debug_assert(ret >= 0); return ret; } static bool check_fit_imm(uint32_t imm) { return encode_imm(imm) >= 0; } /* Return true if v16 is a valid 16-bit shifted immediate. */ static bool is_shimm16(uint16_t v16, int *cmode, int *imm8) { if (v16 == (v16 & 0xff)) { *cmode = 0x8; *imm8 = v16 & 0xff; return true; } else if (v16 == (v16 & 0xff00)) { *cmode = 0xa; *imm8 = v16 >> 8; return true; } return false; } /* Return true if v32 is a valid 32-bit shifted immediate. */ static bool is_shimm32(uint32_t v32, int *cmode, int *imm8) { if (v32 == (v32 & 0xff)) { *cmode = 0x0; *imm8 = v32 & 0xff; return true; } else if (v32 == (v32 & 0xff00)) { *cmode = 0x2; *imm8 = (v32 >> 8) & 0xff; return true; } else if (v32 == (v32 & 0xff0000)) { *cmode = 0x4; *imm8 = (v32 >> 16) & 0xff; return true; } else if (v32 == (v32 & 0xff000000)) { *cmode = 0x6; *imm8 = v32 >> 24; return true; } return false; } /* Return true if v32 is a valid 32-bit shifting ones immediate. */ static bool is_soimm32(uint32_t v32, int *cmode, int *imm8) { if ((v32 & 0xffff00ff) == 0xff) { *cmode = 0xc; *imm8 = (v32 >> 8) & 0xff; return true; } else if ((v32 & 0xff00ffff) == 0xffff) { *cmode = 0xd; *imm8 = (v32 >> 16) & 0xff; return true; } return false; } /* * Return non-zero if v32 can be formed by MOVI+ORR. * Place the parameters for MOVI in (cmode, imm8). * Return the cmode for ORR; the imm8 can be had via extraction from v32. */ static int is_shimm32_pair(uint32_t v32, int *cmode, int *imm8) { int i; for (i = 6; i > 0; i -= 2) { /* Mask out one byte we can add with ORR. */ uint32_t tmp = v32 & ~(0xffu << (i * 4)); if (is_shimm32(tmp, cmode, imm8) || is_soimm32(tmp, cmode, imm8)) { break; } } return i; } /* Return true if V is a valid 16-bit or 32-bit shifted immediate. */ static bool is_shimm1632(uint32_t v32, int *cmode, int *imm8) { if (v32 == deposit32(v32, 16, 16, v32)) { return is_shimm16(v32, cmode, imm8); } else { return is_shimm32(v32, cmode, imm8); } } /* Test if a constant matches the constraint. * TODO: define constraints for: * * ldr/str offset: between -0xfff and 0xfff * ldrh/strh offset: between -0xff and 0xff * mov operand2: values represented with x << (2 * y), x < 0x100 * add, sub, eor...: ditto */ static bool tcg_target_const_match(int64_t val, TCGType type, int ct) { if (ct & TCG_CT_CONST) { return 1; } else if ((ct & TCG_CT_CONST_ARM) && check_fit_imm(val)) { return 1; } else if ((ct & TCG_CT_CONST_INV) && check_fit_imm(~val)) { return 1; } else if ((ct & TCG_CT_CONST_NEG) && check_fit_imm(-val)) { return 1; } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) { return 1; } switch (ct & (TCG_CT_CONST_ORRI | TCG_CT_CONST_ANDI)) { case 0: break; case TCG_CT_CONST_ANDI: val = ~val; /* fallthru */ case TCG_CT_CONST_ORRI: if (val == deposit64(val, 32, 32, val)) { int cmode, imm8; return is_shimm1632(val, &cmode, &imm8); } break; default: /* Both bits should not be set for the same insn. */ g_assert_not_reached(); } return 0; } static void tcg_out_b_imm(TCGContext *s, ARMCond cond, int32_t offset) { tcg_out32(s, (cond << 28) | INSN_B | (((offset - 8) >> 2) & 0x00ffffff)); } static void tcg_out_bl_imm(TCGContext *s, ARMCond cond, int32_t offset) { tcg_out32(s, (cond << 28) | 0x0b000000 | (((offset - 8) >> 2) & 0x00ffffff)); } static void tcg_out_blx_reg(TCGContext *s, ARMCond cond, TCGReg rn) { tcg_out32(s, (cond << 28) | 0x012fff30 | rn); } static void tcg_out_blx_imm(TCGContext *s, int32_t offset) { tcg_out32(s, 0xfa000000 | ((offset & 2) << 23) | (((offset - 8) >> 2) & 0x00ffffff)); } static void tcg_out_dat_reg(TCGContext *s, ARMCond cond, ARMInsn opc, TCGReg rd, TCGReg rn, TCGReg rm, int shift) { tcg_out32(s, (cond << 28) | (0 << 25) | opc | (rn << 16) | (rd << 12) | shift | rm); } static void tcg_out_mov_reg(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rm) { /* Simple reg-reg move, optimising out the 'do nothing' case */ if (rd != rm) { tcg_out_dat_reg(s, cond, ARITH_MOV, rd, 0, rm, SHIFT_IMM_LSL(0)); } } static void tcg_out_bx_reg(TCGContext *s, ARMCond cond, TCGReg rn) { tcg_out32(s, (cond << 28) | 0x012fff10 | rn); } static void tcg_out_b_reg(TCGContext *s, ARMCond cond, TCGReg rn) { /* * Unless the C portion of QEMU is compiled as thumb, we don't need * true BX semantics; merely a branch to an address held in a register. */ tcg_out_bx_reg(s, cond, rn); } static void tcg_out_dat_imm(TCGContext *s, ARMCond cond, ARMInsn opc, TCGReg rd, TCGReg rn, int im) { tcg_out32(s, (cond << 28) | (1 << 25) | opc | (rn << 16) | (rd << 12) | im); } static void tcg_out_ldstm(TCGContext *s, ARMCond cond, ARMInsn opc, TCGReg rn, uint16_t mask) { tcg_out32(s, (cond << 28) | opc | (rn << 16) | mask); } /* Note that this routine is used for both LDR and LDRH formats, so we do not wish to include an immediate shift at this point. */ static void tcg_out_memop_r(TCGContext *s, ARMCond cond, ARMInsn opc, TCGReg rt, TCGReg rn, TCGReg rm, bool u, bool p, bool w) { tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) | (w << 21) | (rn << 16) | (rt << 12) | rm); } static void tcg_out_memop_8(TCGContext *s, ARMCond cond, ARMInsn opc, TCGReg rt, TCGReg rn, int imm8, bool p, bool w) { bool u = 1; if (imm8 < 0) { imm8 = -imm8; u = 0; } tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) | (w << 21) | (rn << 16) | (rt << 12) | ((imm8 & 0xf0) << 4) | (imm8 & 0xf)); } static void tcg_out_memop_12(TCGContext *s, ARMCond cond, ARMInsn opc, TCGReg rt, TCGReg rn, int imm12, bool p, bool w) { bool u = 1; if (imm12 < 0) { imm12 = -imm12; u = 0; } tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) | (w << 21) | (rn << 16) | (rt << 12) | imm12); } static void tcg_out_ld32_12(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm12) { tcg_out_memop_12(s, cond, INSN_LDR_IMM, rt, rn, imm12, 1, 0); } static void tcg_out_st32_12(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm12) { tcg_out_memop_12(s, cond, INSN_STR_IMM, rt, rn, imm12, 1, 0); } static void tcg_out_ld32_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDR_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_st32_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_STR_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_ldrd_8(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm8) { tcg_out_memop_8(s, cond, INSN_LDRD_IMM, rt, rn, imm8, 1, 0); } static void tcg_out_ldrd_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDRD_REG, rt, rn, rm, 1, 1, 0); } static void __attribute__((unused)) tcg_out_ldrd_rwb(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDRD_REG, rt, rn, rm, 1, 1, 1); } static void tcg_out_strd_8(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm8) { tcg_out_memop_8(s, cond, INSN_STRD_IMM, rt, rn, imm8, 1, 0); } static void tcg_out_strd_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_STRD_REG, rt, rn, rm, 1, 1, 0); } /* Register pre-increment with base writeback. */ static void tcg_out_ld32_rwb(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDR_REG, rt, rn, rm, 1, 1, 1); } static void tcg_out_st32_rwb(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_STR_REG, rt, rn, rm, 1, 1, 1); } static void tcg_out_ld16u_8(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm8) { tcg_out_memop_8(s, cond, INSN_LDRH_IMM, rt, rn, imm8, 1, 0); } static void tcg_out_st16_8(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm8) { tcg_out_memop_8(s, cond, INSN_STRH_IMM, rt, rn, imm8, 1, 0); } static void tcg_out_ld16u_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDRH_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_st16_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_STRH_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_ld16s_8(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm8) { tcg_out_memop_8(s, cond, INSN_LDRSH_IMM, rt, rn, imm8, 1, 0); } static void tcg_out_ld16s_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDRSH_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_ld8_12(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm12) { tcg_out_memop_12(s, cond, INSN_LDRB_IMM, rt, rn, imm12, 1, 0); } static void tcg_out_st8_12(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm12) { tcg_out_memop_12(s, cond, INSN_STRB_IMM, rt, rn, imm12, 1, 0); } static void tcg_out_ld8_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDRB_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_st8_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_STRB_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_ld8s_8(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, int imm8) { tcg_out_memop_8(s, cond, INSN_LDRSB_IMM, rt, rn, imm8, 1, 0); } static void tcg_out_ld8s_r(TCGContext *s, ARMCond cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDRSB_REG, rt, rn, rm, 1, 1, 0); } static void tcg_out_movi_pool(TCGContext *s, ARMCond cond, TCGReg rd, uint32_t arg) { new_pool_label(s, arg, R_ARM_PC13, s->code_ptr, 0); tcg_out_ld32_12(s, cond, rd, TCG_REG_PC, 0); } static void tcg_out_movi32(TCGContext *s, ARMCond cond, TCGReg rd, uint32_t arg) { int imm12, diff, opc, sh1, sh2; uint32_t tt0, tt1, tt2; /* Check a single MOV/MVN before anything else. */ imm12 = encode_imm(arg); if (imm12 >= 0) { tcg_out_dat_imm(s, cond, ARITH_MOV, rd, 0, imm12); return; } imm12 = encode_imm(~arg); if (imm12 >= 0) { tcg_out_dat_imm(s, cond, ARITH_MVN, rd, 0, imm12); return; } /* Check for a pc-relative address. This will usually be the TB, or within the TB, which is immediately before the code block. */ diff = tcg_pcrel_diff(s, (void *)arg) - 8; if (diff >= 0) { imm12 = encode_imm(diff); if (imm12 >= 0) { tcg_out_dat_imm(s, cond, ARITH_ADD, rd, TCG_REG_PC, imm12); return; } } else { imm12 = encode_imm(-diff); if (imm12 >= 0) { tcg_out_dat_imm(s, cond, ARITH_SUB, rd, TCG_REG_PC, imm12); return; } } /* Use movw + movt. */ if (use_armv7_instructions) { /* movw */ tcg_out32(s, (cond << 28) | 0x03000000 | (rd << 12) | ((arg << 4) & 0x000f0000) | (arg & 0xfff)); if (arg & 0xffff0000) { /* movt */ tcg_out32(s, (cond << 28) | 0x03400000 | (rd << 12) | ((arg >> 12) & 0x000f0000) | ((arg >> 16) & 0xfff)); } return; } /* Look for sequences of two insns. If we have lots of 1's, we can shorten the sequence by beginning with mvn and then clearing higher bits with eor. */ tt0 = arg; opc = ARITH_MOV; if (ctpop32(arg) > 16) { tt0 = ~arg; opc = ARITH_MVN; } sh1 = ctz32(tt0) & ~1; tt1 = tt0 & ~(0xff << sh1); sh2 = ctz32(tt1) & ~1; tt2 = tt1 & ~(0xff << sh2); if (tt2 == 0) { int rot; rot = ((32 - sh1) << 7) & 0xf00; tcg_out_dat_imm(s, cond, opc, rd, 0, ((tt0 >> sh1) & 0xff) | rot); rot = ((32 - sh2) << 7) & 0xf00; tcg_out_dat_imm(s, cond, ARITH_EOR, rd, rd, ((tt0 >> sh2) & 0xff) | rot); return; } /* Otherwise, drop it into the constant pool. */ tcg_out_movi_pool(s, cond, rd, arg); } /* * Emit either the reg,imm or reg,reg form of a data-processing insn. * rhs must satisfy the "rI" constraint. */ static void tcg_out_dat_rI(TCGContext *s, ARMCond cond, ARMInsn opc, TCGReg dst, TCGReg lhs, TCGArg rhs, int rhs_is_const) { if (rhs_is_const) { tcg_out_dat_imm(s, cond, opc, dst, lhs, encode_imm_nofail(rhs)); } else { tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0)); } } /* * Emit either the reg,imm or reg,reg form of a data-processing insn. * rhs must satisfy the "rIK" constraint. */ static void tcg_out_dat_rIK(TCGContext *s, ARMCond cond, ARMInsn opc, ARMInsn opinv, TCGReg dst, TCGReg lhs, TCGArg rhs, bool rhs_is_const) { if (rhs_is_const) { int imm12 = encode_imm(rhs); if (imm12 < 0) { imm12 = encode_imm_nofail(~rhs); opc = opinv; } tcg_out_dat_imm(s, cond, opc, dst, lhs, imm12); } else { tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0)); } } static void tcg_out_dat_rIN(TCGContext *s, ARMCond cond, ARMInsn opc, ARMInsn opneg, TCGReg dst, TCGReg lhs, TCGArg rhs, bool rhs_is_const) { /* Emit either the reg,imm or reg,reg form of a data-processing insn. * rhs must satisfy the "rIN" constraint. */ if (rhs_is_const) { int imm12 = encode_imm(rhs); if (imm12 < 0) { imm12 = encode_imm_nofail(-rhs); opc = opneg; } tcg_out_dat_imm(s, cond, opc, dst, lhs, imm12); } else { tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0)); } } static void tcg_out_mul32(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, TCGReg rm) { /* mul */ tcg_out32(s, (cond << 28) | 0x90 | (rd << 16) | (rm << 8) | rn); } static void tcg_out_umull32(TCGContext *s, ARMCond cond, TCGReg rd0, TCGReg rd1, TCGReg rn, TCGReg rm) { /* umull */ tcg_out32(s, (cond << 28) | 0x00800090 | (rd1 << 16) | (rd0 << 12) | (rm << 8) | rn); } static void tcg_out_smull32(TCGContext *s, ARMCond cond, TCGReg rd0, TCGReg rd1, TCGReg rn, TCGReg rm) { /* smull */ tcg_out32(s, (cond << 28) | 0x00c00090 | (rd1 << 16) | (rd0 << 12) | (rm << 8) | rn); } static void tcg_out_sdiv(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, TCGReg rm) { tcg_out32(s, 0x0710f010 | (cond << 28) | (rd << 16) | rn | (rm << 8)); } static void tcg_out_udiv(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, TCGReg rm) { tcg_out32(s, 0x0730f010 | (cond << 28) | (rd << 16) | rn | (rm << 8)); } static void tcg_out_ext8s(TCGContext *s, TCGType t, TCGReg rd, TCGReg rn) { /* sxtb */ tcg_out32(s, 0x06af0070 | (COND_AL << 28) | (rd << 12) | rn); } static void tcg_out_ext8u(TCGContext *s, TCGReg rd, TCGReg rn) { tcg_out_dat_imm(s, COND_AL, ARITH_AND, rd, rn, 0xff); } static void __attribute__((unused)) tcg_out_ext8u_cond(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn) { tcg_out_dat_imm(s, cond, ARITH_AND, rd, rn, 0xff); } static void tcg_out_ext16s(TCGContext *s, TCGType t, TCGReg rd, TCGReg rn) { /* sxth */ tcg_out32(s, 0x06bf0070 | (COND_AL << 28) | (rd << 12) | rn); } static void tcg_out_ext16u_cond(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn) { /* uxth */ tcg_out32(s, 0x06ff0070 | (cond << 28) | (rd << 12) | rn); } static void tcg_out_ext16u(TCGContext *s, TCGReg rd, TCGReg rn) { tcg_out_ext16u_cond(s, COND_AL, rd, rn); } static void tcg_out_ext32s(TCGContext *s, TCGReg rd, TCGReg rn) { g_assert_not_reached(); } static void tcg_out_ext32u(TCGContext *s, TCGReg rd, TCGReg rn) { g_assert_not_reached(); } static void tcg_out_bswap16(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int flags) { if (flags & TCG_BSWAP_OS) { /* revsh */ tcg_out32(s, 0x06ff0fb0 | (cond << 28) | (rd << 12) | rn); return; } /* rev16 */ tcg_out32(s, 0x06bf0fb0 | (cond << 28) | (rd << 12) | rn); if ((flags & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { /* uxth */ tcg_out32(s, 0x06ff0070 | (cond << 28) | (rd << 12) | rd); } } static void tcg_out_bswap32(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn) { /* rev */ tcg_out32(s, 0x06bf0f30 | (cond << 28) | (rd << 12) | rn); } static void tcg_out_deposit(TCGContext *s, ARMCond cond, TCGReg rd, TCGArg a1, int ofs, int len, bool const_a1) { if (const_a1) { /* bfi becomes bfc with rn == 15. */ a1 = 15; } /* bfi/bfc */ tcg_out32(s, 0x07c00010 | (cond << 28) | (rd << 12) | a1 | (ofs << 7) | ((ofs + len - 1) << 16)); } static void tcg_out_extract(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int ofs, int len) { /* ubfx */ tcg_out32(s, 0x07e00050 | (cond << 28) | (rd << 12) | rn | (ofs << 7) | ((len - 1) << 16)); } static void tcg_out_sextract(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int ofs, int len) { /* sbfx */ tcg_out32(s, 0x07a00050 | (cond << 28) | (rd << 12) | rn | (ofs << 7) | ((len - 1) << 16)); } static void tcg_out_ld32u(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xfff || offset < -0xfff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_ld32_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_ld32_12(s, cond, rd, rn, offset); } static void tcg_out_st32(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xfff || offset < -0xfff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_st32_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_st32_12(s, cond, rd, rn, offset); } static void tcg_out_ld16u(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xff || offset < -0xff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_ld16u_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_ld16u_8(s, cond, rd, rn, offset); } static void tcg_out_ld16s(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xff || offset < -0xff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_ld16s_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_ld16s_8(s, cond, rd, rn, offset); } static void tcg_out_st16(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xff || offset < -0xff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_st16_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_st16_8(s, cond, rd, rn, offset); } static void tcg_out_ld8u(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xfff || offset < -0xfff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_ld8_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_ld8_12(s, cond, rd, rn, offset); } static void tcg_out_ld8s(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xff || offset < -0xff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_ld8s_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_ld8s_8(s, cond, rd, rn, offset); } static void tcg_out_st8(TCGContext *s, ARMCond cond, TCGReg rd, TCGReg rn, int32_t offset) { if (offset > 0xfff || offset < -0xfff) { tcg_out_movi32(s, cond, TCG_REG_TMP, offset); tcg_out_st8_r(s, cond, rd, rn, TCG_REG_TMP); } else tcg_out_st8_12(s, cond, rd, rn, offset); } /* * The _goto case is normally between TBs within the same code buffer, and * with the code buffer limited to 16MB we wouldn't need the long case. * But we also use it for the tail-call to the qemu_ld/st helpers, which does. */ static void tcg_out_goto(TCGContext *s, ARMCond cond, const tcg_insn_unit *addr) { intptr_t addri = (intptr_t)addr; ptrdiff_t disp = tcg_pcrel_diff(s, addr); bool arm_mode = !(addri & 1); if (arm_mode && disp - 8 < 0x01fffffd && disp - 8 > -0x01fffffd) { tcg_out_b_imm(s, cond, disp); return; } /* LDR is interworking from v5t. */ tcg_out_movi_pool(s, cond, TCG_REG_PC, addri); } /* * The call case is mostly used for helpers - so it's not unreasonable * for them to be beyond branch range. */ static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *addr) { intptr_t addri = (intptr_t)addr; ptrdiff_t disp = tcg_pcrel_diff(s, addr); bool arm_mode = !(addri & 1); if (disp - 8 < 0x02000000 && disp - 8 >= -0x02000000) { if (arm_mode) { tcg_out_bl_imm(s, COND_AL, disp); } else { tcg_out_blx_imm(s, disp); } return; } tcg_out_movi32(s, COND_AL, TCG_REG_TMP, addri); tcg_out_blx_reg(s, COND_AL, TCG_REG_TMP); } static void tcg_out_call(TCGContext *s, const tcg_insn_unit *addr, const TCGHelperInfo *info) { tcg_out_call_int(s, addr); } static void tcg_out_goto_label(TCGContext *s, ARMCond cond, TCGLabel *l) { if (l->has_value) { tcg_out_goto(s, cond, l->u.value_ptr); } else { tcg_out_reloc(s, s->code_ptr, R_ARM_PC24, l, 0); tcg_out_b_imm(s, cond, 0); } } static void tcg_out_mb(TCGContext *s, TCGArg a0) { if (use_armv7_instructions) { tcg_out32(s, INSN_DMB_ISH); } else { tcg_out32(s, INSN_DMB_MCR); } } static TCGCond tcg_out_cmp2(TCGContext *s, const TCGArg *args, const int *const_args) { TCGReg al = args[0]; TCGReg ah = args[1]; TCGArg bl = args[2]; TCGArg bh = args[3]; TCGCond cond = args[4]; int const_bl = const_args[2]; int const_bh = const_args[3]; switch (cond) { case TCG_COND_EQ: case TCG_COND_NE: case TCG_COND_LTU: case TCG_COND_LEU: case TCG_COND_GTU: case TCG_COND_GEU: /* We perform a conditional comparision. If the high half is equal, then overwrite the flags with the comparison of the low half. The resulting flags cover the whole. */ tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 0, ah, bh, const_bh); tcg_out_dat_rI(s, COND_EQ, ARITH_CMP, 0, al, bl, const_bl); return cond; case TCG_COND_LT: case TCG_COND_GE: /* We perform a double-word subtraction and examine the result. We do not actually need the result of the subtract, so the low part "subtract" is a compare. For the high half we have no choice but to compute into a temporary. */ tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 0, al, bl, const_bl); tcg_out_dat_rI(s, COND_AL, ARITH_SBC | TO_CPSR, TCG_REG_TMP, ah, bh, const_bh); return cond; case TCG_COND_LE: case TCG_COND_GT: /* Similar, but with swapped arguments, via reversed subtract. */ tcg_out_dat_rI(s, COND_AL, ARITH_RSB | TO_CPSR, TCG_REG_TMP, al, bl, const_bl); tcg_out_dat_rI(s, COND_AL, ARITH_RSC | TO_CPSR, TCG_REG_TMP, ah, bh, const_bh); return tcg_swap_cond(cond); default: g_assert_not_reached(); } } /* * Note that TCGReg references Q-registers. * Q-regno = 2 * D-regno, so shift left by 1 whlie inserting. */ static uint32_t encode_vd(TCGReg rd) { tcg_debug_assert(rd >= TCG_REG_Q0); return (extract32(rd, 3, 1) << 22) | (extract32(rd, 0, 3) << 13); } static uint32_t encode_vn(TCGReg rn) { tcg_debug_assert(rn >= TCG_REG_Q0); return (extract32(rn, 3, 1) << 7) | (extract32(rn, 0, 3) << 17); } static uint32_t encode_vm(TCGReg rm) { tcg_debug_assert(rm >= TCG_REG_Q0); return (extract32(rm, 3, 1) << 5) | (extract32(rm, 0, 3) << 1); } static void tcg_out_vreg2(TCGContext *s, ARMInsn insn, int q, int vece, TCGReg d, TCGReg m) { tcg_out32(s, insn | (vece << 18) | (q << 6) | encode_vd(d) | encode_vm(m)); } static void tcg_out_vreg3(TCGContext *s, ARMInsn insn, int q, int vece, TCGReg d, TCGReg n, TCGReg m) { tcg_out32(s, insn | (vece << 20) | (q << 6) | encode_vd(d) | encode_vn(n) | encode_vm(m)); } static void tcg_out_vmovi(TCGContext *s, TCGReg rd, int q, int op, int cmode, uint8_t imm8) { tcg_out32(s, INSN_VMOVI | encode_vd(rd) | (q << 6) | (op << 5) | (cmode << 8) | extract32(imm8, 0, 4) | (extract32(imm8, 4, 3) << 16) | (extract32(imm8, 7, 1) << 24)); } static void tcg_out_vshifti(TCGContext *s, ARMInsn insn, int q, TCGReg rd, TCGReg rm, int l_imm6) { tcg_out32(s, insn | (q << 6) | encode_vd(rd) | encode_vm(rm) | (extract32(l_imm6, 6, 1) << 7) | (extract32(l_imm6, 0, 6) << 16)); } static void tcg_out_vldst(TCGContext *s, ARMInsn insn, TCGReg rd, TCGReg rn, int offset) { if (offset != 0) { if (check_fit_imm(offset) || check_fit_imm(-offset)) { tcg_out_dat_rIN(s, COND_AL, ARITH_ADD, ARITH_SUB, TCG_REG_TMP, rn, offset, true); } else { tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP, offset); tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_TMP, TCG_REG_TMP, rn, 0); } rn = TCG_REG_TMP; } tcg_out32(s, insn | (rn << 16) | encode_vd(rd) | 0xf); } #ifdef CONFIG_SOFTMMU /* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr, * int mmu_idx, uintptr_t ra) */ static void * const qemu_ld_helpers[MO_SSIZE + 1] = { [MO_UB] = helper_ret_ldub_mmu, [MO_SB] = helper_ret_ldsb_mmu, #if HOST_BIG_ENDIAN [MO_UW] = helper_be_lduw_mmu, [MO_UL] = helper_be_ldul_mmu, [MO_UQ] = helper_be_ldq_mmu, [MO_SW] = helper_be_ldsw_mmu, [MO_SL] = helper_be_ldul_mmu, #else [MO_UW] = helper_le_lduw_mmu, [MO_UL] = helper_le_ldul_mmu, [MO_UQ] = helper_le_ldq_mmu, [MO_SW] = helper_le_ldsw_mmu, [MO_SL] = helper_le_ldul_mmu, #endif }; /* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr, * uintxx_t val, int mmu_idx, uintptr_t ra) */ static void * const qemu_st_helpers[MO_SIZE + 1] = { [MO_8] = helper_ret_stb_mmu, #if HOST_BIG_ENDIAN [MO_16] = helper_be_stw_mmu, [MO_32] = helper_be_stl_mmu, [MO_64] = helper_be_stq_mmu, #else [MO_16] = helper_le_stw_mmu, [MO_32] = helper_le_stl_mmu, [MO_64] = helper_le_stq_mmu, #endif }; /* Helper routines for marshalling helper function arguments into * the correct registers and stack. * argreg is where we want to put this argument, arg is the argument itself. * Return value is the updated argreg ready for the next call. * Note that argreg 0..3 is real registers, 4+ on stack. * * We provide routines for arguments which are: immediate, 32 bit * value in register, 16 and 8 bit values in register (which must be zero * extended before use) and 64 bit value in a lo:hi register pair. */ #define DEFINE_TCG_OUT_ARG(NAME, ARGTYPE, MOV_ARG, EXT_ARG) \ static TCGReg NAME(TCGContext *s, TCGReg argreg, ARGTYPE arg) \ { \ if (argreg < 4) { \ MOV_ARG(s, COND_AL, argreg, arg); \ } else { \ int ofs = (argreg - 4) * 4; \ EXT_ARG; \ tcg_debug_assert(ofs + 4 <= TCG_STATIC_CALL_ARGS_SIZE); \ tcg_out_st32_12(s, COND_AL, arg, TCG_REG_CALL_STACK, ofs); \ } \ return argreg + 1; \ } DEFINE_TCG_OUT_ARG(tcg_out_arg_imm32, uint32_t, tcg_out_movi32, (tcg_out_movi32(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP)) DEFINE_TCG_OUT_ARG(tcg_out_arg_reg8, TCGReg, tcg_out_ext8u_cond, (tcg_out_ext8u_cond(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP)) DEFINE_TCG_OUT_ARG(tcg_out_arg_reg16, TCGReg, tcg_out_ext16u_cond, (tcg_out_ext16u_cond(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP)) DEFINE_TCG_OUT_ARG(tcg_out_arg_reg32, TCGReg, tcg_out_mov_reg, ) static TCGReg tcg_out_arg_reg64(TCGContext *s, TCGReg argreg, TCGReg arglo, TCGReg arghi) { /* 64 bit arguments must go in even/odd register pairs * and in 8-aligned stack slots. */ if (argreg & 1) { argreg++; } if (argreg >= 4 && (arglo & 1) == 0 && arghi == arglo + 1) { tcg_out_strd_8(s, COND_AL, arglo, TCG_REG_CALL_STACK, (argreg - 4) * 4); return argreg + 2; } else { argreg = tcg_out_arg_reg32(s, argreg, arglo); argreg = tcg_out_arg_reg32(s, argreg, arghi); return argreg; } } #define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS) /* We expect to use an 9-bit sign-magnitude negative offset from ENV. */ QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0); QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -256); /* These offsets are built into the LDRD below. */ QEMU_BUILD_BUG_ON(offsetof(CPUTLBDescFast, mask) != 0); QEMU_BUILD_BUG_ON(offsetof(CPUTLBDescFast, table) != 4); /* Load and compare a TLB entry, leaving the flags set. Returns the register containing the addend of the tlb entry. Clobbers R0, R1, R2, TMP. */ static TCGReg tcg_out_tlb_read(TCGContext *s, TCGReg addrlo, TCGReg addrhi, MemOp opc, int mem_index, bool is_load) { int cmp_off = (is_load ? offsetof(CPUTLBEntry, addr_read) : offsetof(CPUTLBEntry, addr_write)); int fast_off = TLB_MASK_TABLE_OFS(mem_index); unsigned s_mask = (1 << (opc & MO_SIZE)) - 1; unsigned a_mask = (1 << get_alignment_bits(opc)) - 1; TCGReg t_addr; /* Load env_tlb(env)->f[mmu_idx].{mask,table} into {r0,r1}. */ tcg_out_ldrd_8(s, COND_AL, TCG_REG_R0, TCG_AREG0, fast_off); /* Extract the tlb index from the address into R0. */ tcg_out_dat_reg(s, COND_AL, ARITH_AND, TCG_REG_R0, TCG_REG_R0, addrlo, SHIFT_IMM_LSR(TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS)); /* * Add the tlb_table pointer, creating the CPUTLBEntry address in R1. * Load the tlb comparator into R2/R3 and the fast path addend into R1. */ if (cmp_off == 0) { if (TARGET_LONG_BITS == 64) { tcg_out_ldrd_rwb(s, COND_AL, TCG_REG_R2, TCG_REG_R1, TCG_REG_R0); } else { tcg_out_ld32_rwb(s, COND_AL, TCG_REG_R2, TCG_REG_R1, TCG_REG_R0); } } else { tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_R1, TCG_REG_R1, TCG_REG_R0, 0); if (TARGET_LONG_BITS == 64) { tcg_out_ldrd_8(s, COND_AL, TCG_REG_R2, TCG_REG_R1, cmp_off); } else { tcg_out_ld32_12(s, COND_AL, TCG_REG_R2, TCG_REG_R1, cmp_off); } } /* Load the tlb addend. */ tcg_out_ld32_12(s, COND_AL, TCG_REG_R1, TCG_REG_R1, offsetof(CPUTLBEntry, addend)); /* * Check alignment, check comparators. * Do this in 2-4 insns. Use MOVW for v7, if possible, * to reduce the number of sequential conditional instructions. * Almost all guests have at least 4k pages, which means that we need * to clear at least 9 bits even for an 8-byte memory, which means it * isn't worth checking for an immediate operand for BIC. * * For unaligned accesses, test the page of the last unit of alignment. * This leaves the least significant alignment bits unchanged, and of * course must be zero. */ t_addr = addrlo; if (a_mask < s_mask) { t_addr = TCG_REG_R0; tcg_out_dat_imm(s, COND_AL, ARITH_ADD, t_addr, addrlo, s_mask - a_mask); } if (use_armv7_instructions && TARGET_PAGE_BITS <= 16) { tcg_out_movi32(s, COND_AL, TCG_REG_TMP, ~(TARGET_PAGE_MASK | a_mask)); tcg_out_dat_reg(s, COND_AL, ARITH_BIC, TCG_REG_TMP, t_addr, TCG_REG_TMP, 0); tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0, TCG_REG_R2, TCG_REG_TMP, 0); } else { if (a_mask) { tcg_debug_assert(a_mask <= 0xff); tcg_out_dat_imm(s, COND_AL, ARITH_TST, 0, addrlo, a_mask); } tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_TMP, 0, t_addr, SHIFT_IMM_LSR(TARGET_PAGE_BITS)); tcg_out_dat_reg(s, (a_mask ? COND_EQ : COND_AL), ARITH_CMP, 0, TCG_REG_R2, TCG_REG_TMP, SHIFT_IMM_LSL(TARGET_PAGE_BITS)); } if (TARGET_LONG_BITS == 64) { tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0, TCG_REG_R3, addrhi, 0); } return TCG_REG_R1; } /* Record the context of a call to the out of line helper code for the slow path for a load or store, so that we can later generate the correct helper code. */ static void add_qemu_ldst_label(TCGContext *s, bool is_ld, MemOpIdx oi, TCGReg datalo, TCGReg datahi, TCGReg addrlo, TCGReg addrhi, tcg_insn_unit *raddr, tcg_insn_unit *label_ptr) { TCGLabelQemuLdst *label = new_ldst_label(s); label->is_ld = is_ld; label->oi = oi; label->datalo_reg = datalo; label->datahi_reg = datahi; label->addrlo_reg = addrlo; label->addrhi_reg = addrhi; label->raddr = tcg_splitwx_to_rx(raddr); label->label_ptr[0] = label_ptr; } static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) { TCGReg argreg, datalo, datahi; MemOpIdx oi = lb->oi; MemOp opc = get_memop(oi); if (!reloc_pc24(lb->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } argreg = tcg_out_arg_reg32(s, TCG_REG_R0, TCG_AREG0); if (TARGET_LONG_BITS == 64) { argreg = tcg_out_arg_reg64(s, argreg, lb->addrlo_reg, lb->addrhi_reg); } else { argreg = tcg_out_arg_reg32(s, argreg, lb->addrlo_reg); } argreg = tcg_out_arg_imm32(s, argreg, oi); argreg = tcg_out_arg_reg32(s, argreg, TCG_REG_R14); /* Use the canonical unsigned helpers and minimize icache usage. */ tcg_out_call_int(s, qemu_ld_helpers[opc & MO_SIZE]); datalo = lb->datalo_reg; datahi = lb->datahi_reg; switch (opc & MO_SSIZE) { case MO_SB: tcg_out_ext8s(s, TCG_TYPE_I32, datalo, TCG_REG_R0); break; case MO_SW: tcg_out_ext16s(s, TCG_TYPE_I32, datalo, TCG_REG_R0); break; default: tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0); break; case MO_UQ: if (datalo != TCG_REG_R1) { tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0); tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1); } else if (datahi != TCG_REG_R0) { tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1); tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0); } else { tcg_out_mov_reg(s, COND_AL, TCG_REG_TMP, TCG_REG_R0); tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1); tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_TMP); } break; } tcg_out_goto(s, COND_AL, lb->raddr); return true; } static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) { TCGReg argreg, datalo, datahi; MemOpIdx oi = lb->oi; MemOp opc = get_memop(oi); if (!reloc_pc24(lb->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } argreg = TCG_REG_R0; argreg = tcg_out_arg_reg32(s, argreg, TCG_AREG0); if (TARGET_LONG_BITS == 64) { argreg = tcg_out_arg_reg64(s, argreg, lb->addrlo_reg, lb->addrhi_reg); } else { argreg = tcg_out_arg_reg32(s, argreg, lb->addrlo_reg); } datalo = lb->datalo_reg; datahi = lb->datahi_reg; switch (opc & MO_SIZE) { case MO_8: argreg = tcg_out_arg_reg8(s, argreg, datalo); break; case MO_16: argreg = tcg_out_arg_reg16(s, argreg, datalo); break; case MO_32: default: argreg = tcg_out_arg_reg32(s, argreg, datalo); break; case MO_64: argreg = tcg_out_arg_reg64(s, argreg, datalo, datahi); break; } argreg = tcg_out_arg_imm32(s, argreg, oi); argreg = tcg_out_arg_reg32(s, argreg, TCG_REG_R14); /* Tail-call to the helper, which will return to the fast path. */ tcg_out_goto(s, COND_AL, qemu_st_helpers[opc & MO_SIZE]); return true; } #else static void tcg_out_test_alignment(TCGContext *s, bool is_ld, TCGReg addrlo, TCGReg addrhi, unsigned a_bits) { unsigned a_mask = (1 << a_bits) - 1; TCGLabelQemuLdst *label = new_ldst_label(s); label->is_ld = is_ld; label->addrlo_reg = addrlo; label->addrhi_reg = addrhi; /* We are expecting a_bits to max out at 7, and can easily support 8. */ tcg_debug_assert(a_mask <= 0xff); /* tst addr, #mask */ tcg_out_dat_imm(s, COND_AL, ARITH_TST, 0, addrlo, a_mask); /* blne slow_path */ label->label_ptr[0] = s->code_ptr; tcg_out_bl_imm(s, COND_NE, 0); label->raddr = tcg_splitwx_to_rx(s->code_ptr); } static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l) { if (!reloc_pc24(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } if (TARGET_LONG_BITS == 64) { /* 64-bit target address is aligned into R2:R3. */ if (l->addrhi_reg != TCG_REG_R2) { tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R2, l->addrlo_reg); tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R3, l->addrhi_reg); } else if (l->addrlo_reg != TCG_REG_R3) { tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R3, l->addrhi_reg); tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R2, l->addrlo_reg); } else { tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R1, TCG_REG_R2); tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R2, TCG_REG_R3); tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R3, TCG_REG_R1); } } else { tcg_out_mov(s, TCG_TYPE_I32, TCG_REG_R1, l->addrlo_reg); } tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_R0, TCG_AREG0); /* * Tail call to the helper, with the return address back inline, * just for the clarity of the debugging traceback -- the helper * cannot return. We have used BLNE to arrive here, so LR is * already set. */ tcg_out_goto(s, COND_AL, (const void *) (l->is_ld ? helper_unaligned_ld : helper_unaligned_st)); return true; } static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) { return tcg_out_fail_alignment(s, l); } static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) { return tcg_out_fail_alignment(s, l); } #endif /* SOFTMMU */ static void tcg_out_qemu_ld_index(TCGContext *s, MemOp opc, TCGReg datalo, TCGReg datahi, TCGReg addrlo, TCGReg addend, bool scratch_addend) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) == 0); switch (opc & MO_SSIZE) { case MO_UB: tcg_out_ld8_r(s, COND_AL, datalo, addrlo, addend); break; case MO_SB: tcg_out_ld8s_r(s, COND_AL, datalo, addrlo, addend); break; case MO_UW: tcg_out_ld16u_r(s, COND_AL, datalo, addrlo, addend); break; case MO_SW: tcg_out_ld16s_r(s, COND_AL, datalo, addrlo, addend); break; case MO_UL: tcg_out_ld32_r(s, COND_AL, datalo, addrlo, addend); break; case MO_UQ: /* We used pair allocation for datalo, so already should be aligned. */ tcg_debug_assert((datalo & 1) == 0); tcg_debug_assert(datahi == datalo + 1); /* LDRD requires alignment; double-check that. */ if (get_alignment_bits(opc) >= MO_64) { /* * Rm (the second address op) must not overlap Rt or Rt + 1. * Since datalo is aligned, we can simplify the test via alignment. * Flip the two address arguments if that works. */ if ((addend & ~1) != datalo) { tcg_out_ldrd_r(s, COND_AL, datalo, addrlo, addend); break; } if ((addrlo & ~1) != datalo) { tcg_out_ldrd_r(s, COND_AL, datalo, addend, addrlo); break; } } if (scratch_addend) { tcg_out_ld32_rwb(s, COND_AL, datalo, addend, addrlo); tcg_out_ld32_12(s, COND_AL, datahi, addend, 4); } else { tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_TMP, addend, addrlo, SHIFT_IMM_LSL(0)); tcg_out_ld32_12(s, COND_AL, datalo, TCG_REG_TMP, 0); tcg_out_ld32_12(s, COND_AL, datahi, TCG_REG_TMP, 4); } break; default: g_assert_not_reached(); } } #ifndef CONFIG_SOFTMMU static void tcg_out_qemu_ld_direct(TCGContext *s, MemOp opc, TCGReg datalo, TCGReg datahi, TCGReg addrlo) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) == 0); switch (opc & MO_SSIZE) { case MO_UB: tcg_out_ld8_12(s, COND_AL, datalo, addrlo, 0); break; case MO_SB: tcg_out_ld8s_8(s, COND_AL, datalo, addrlo, 0); break; case MO_UW: tcg_out_ld16u_8(s, COND_AL, datalo, addrlo, 0); break; case MO_SW: tcg_out_ld16s_8(s, COND_AL, datalo, addrlo, 0); break; case MO_UL: tcg_out_ld32_12(s, COND_AL, datalo, addrlo, 0); break; case MO_UQ: /* We used pair allocation for datalo, so already should be aligned. */ tcg_debug_assert((datalo & 1) == 0); tcg_debug_assert(datahi == datalo + 1); /* LDRD requires alignment; double-check that. */ if (get_alignment_bits(opc) >= MO_64) { tcg_out_ldrd_8(s, COND_AL, datalo, addrlo, 0); } else if (datalo == addrlo) { tcg_out_ld32_12(s, COND_AL, datahi, addrlo, 4); tcg_out_ld32_12(s, COND_AL, datalo, addrlo, 0); } else { tcg_out_ld32_12(s, COND_AL, datalo, addrlo, 0); tcg_out_ld32_12(s, COND_AL, datahi, addrlo, 4); } break; default: g_assert_not_reached(); } } #endif static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64) { TCGReg addrlo, datalo, datahi, addrhi __attribute__((unused)); MemOpIdx oi; MemOp opc; #ifdef CONFIG_SOFTMMU int mem_index; TCGReg addend; tcg_insn_unit *label_ptr; #else unsigned a_bits; #endif datalo = *args++; datahi = (is64 ? *args++ : 0); addrlo = *args++; addrhi = (TARGET_LONG_BITS == 64 ? *args++ : 0); oi = *args++; opc = get_memop(oi); #ifdef CONFIG_SOFTMMU mem_index = get_mmuidx(oi); addend = tcg_out_tlb_read(s, addrlo, addrhi, opc, mem_index, 1); /* This a conditional BL only to load a pointer within this opcode into LR for the slow path. We will not be using the value for a tail call. */ label_ptr = s->code_ptr; tcg_out_bl_imm(s, COND_NE, 0); tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, addend, true); add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi, s->code_ptr, label_ptr); #else /* !CONFIG_SOFTMMU */ a_bits = get_alignment_bits(opc); if (a_bits) { tcg_out_test_alignment(s, true, addrlo, addrhi, a_bits); } if (guest_base) { tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, TCG_REG_GUEST_BASE, false); } else { tcg_out_qemu_ld_direct(s, opc, datalo, datahi, addrlo); } #endif } static void tcg_out_qemu_st_index(TCGContext *s, ARMCond cond, MemOp opc, TCGReg datalo, TCGReg datahi, TCGReg addrlo, TCGReg addend, bool scratch_addend) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) == 0); switch (opc & MO_SIZE) { case MO_8: tcg_out_st8_r(s, cond, datalo, addrlo, addend); break; case MO_16: tcg_out_st16_r(s, cond, datalo, addrlo, addend); break; case MO_32: tcg_out_st32_r(s, cond, datalo, addrlo, addend); break; case MO_64: /* We used pair allocation for datalo, so already should be aligned. */ tcg_debug_assert((datalo & 1) == 0); tcg_debug_assert(datahi == datalo + 1); /* STRD requires alignment; double-check that. */ if (get_alignment_bits(opc) >= MO_64) { tcg_out_strd_r(s, cond, datalo, addrlo, addend); } else if (scratch_addend) { tcg_out_st32_rwb(s, cond, datalo, addend, addrlo); tcg_out_st32_12(s, cond, datahi, addend, 4); } else { tcg_out_dat_reg(s, cond, ARITH_ADD, TCG_REG_TMP, addend, addrlo, SHIFT_IMM_LSL(0)); tcg_out_st32_12(s, cond, datalo, TCG_REG_TMP, 0); tcg_out_st32_12(s, cond, datahi, TCG_REG_TMP, 4); } break; default: g_assert_not_reached(); } } #ifndef CONFIG_SOFTMMU static void tcg_out_qemu_st_direct(TCGContext *s, MemOp opc, TCGReg datalo, TCGReg datahi, TCGReg addrlo) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) == 0); switch (opc & MO_SIZE) { case MO_8: tcg_out_st8_12(s, COND_AL, datalo, addrlo, 0); break; case MO_16: tcg_out_st16_8(s, COND_AL, datalo, addrlo, 0); break; case MO_32: tcg_out_st32_12(s, COND_AL, datalo, addrlo, 0); break; case MO_64: /* We used pair allocation for datalo, so already should be aligned. */ tcg_debug_assert((datalo & 1) == 0); tcg_debug_assert(datahi == datalo + 1); /* STRD requires alignment; double-check that. */ if (get_alignment_bits(opc) >= MO_64) { tcg_out_strd_8(s, COND_AL, datalo, addrlo, 0); } else { tcg_out_st32_12(s, COND_AL, datalo, addrlo, 0); tcg_out_st32_12(s, COND_AL, datahi, addrlo, 4); } break; default: g_assert_not_reached(); } } #endif static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) { TCGReg addrlo, datalo, datahi, addrhi __attribute__((unused)); MemOpIdx oi; MemOp opc; #ifdef CONFIG_SOFTMMU int mem_index; TCGReg addend; tcg_insn_unit *label_ptr; #else unsigned a_bits; #endif datalo = *args++; datahi = (is64 ? *args++ : 0); addrlo = *args++; addrhi = (TARGET_LONG_BITS == 64 ? *args++ : 0); oi = *args++; opc = get_memop(oi); #ifdef CONFIG_SOFTMMU mem_index = get_mmuidx(oi); addend = tcg_out_tlb_read(s, addrlo, addrhi, opc, mem_index, 0); tcg_out_qemu_st_index(s, COND_EQ, opc, datalo, datahi, addrlo, addend, true); /* The conditional call must come last, as we're going to return here. */ label_ptr = s->code_ptr; tcg_out_bl_imm(s, COND_NE, 0); add_qemu_ldst_label(s, false, oi, datalo, datahi, addrlo, addrhi, s->code_ptr, label_ptr); #else /* !CONFIG_SOFTMMU */ a_bits = get_alignment_bits(opc); if (a_bits) { tcg_out_test_alignment(s, false, addrlo, addrhi, a_bits); } if (guest_base) { tcg_out_qemu_st_index(s, COND_AL, opc, datalo, datahi, addrlo, TCG_REG_GUEST_BASE, false); } else { tcg_out_qemu_st_direct(s, opc, datalo, datahi, addrlo); } #endif } static void tcg_out_epilogue(TCGContext *s); static void tcg_out_exit_tb(TCGContext *s, uintptr_t arg) { tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, arg); tcg_out_epilogue(s); } static void tcg_out_goto_tb(TCGContext *s, int which) { uintptr_t i_addr; intptr_t i_disp; /* Direct branch will be patched by tb_target_set_jmp_target. */ set_jmp_insn_offset(s, which); tcg_out32(s, INSN_NOP); /* When branch is out of range, fall through to indirect. */ i_addr = get_jmp_target_addr(s, which); i_disp = tcg_pcrel_diff(s, (void *)i_addr) - 8; tcg_debug_assert(i_disp < 0); if (i_disp >= -0xfff) { tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, i_disp); } else { /* * The TB is close, but outside the 12 bits addressable by * the load. We can extend this to 20 bits with a sub of a * shifted immediate from pc. */ int h = -i_disp; int l = h & 0xfff; h = encode_imm_nofail(h - l); tcg_out_dat_imm(s, COND_AL, ARITH_SUB, TCG_REG_R0, TCG_REG_PC, h); tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_R0, l); } set_jmp_reset_offset(s, which); } void tb_target_set_jmp_target(const TranslationBlock *tb, int n, uintptr_t jmp_rx, uintptr_t jmp_rw) { uintptr_t addr = tb->jmp_target_addr[n]; ptrdiff_t offset = addr - (jmp_rx + 8); tcg_insn_unit insn; /* Either directly branch, or fall through to indirect branch. */ if (offset == sextract64(offset, 0, 26)) { /* B */ insn = deposit32((COND_AL << 28) | INSN_B, 0, 24, offset >> 2); } else { insn = INSN_NOP; } qatomic_set((uint32_t *)jmp_rw, insn); flush_idcache_range(jmp_rx, jmp_rw, 4); } static void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg args[TCG_MAX_OP_ARGS], const int const_args[TCG_MAX_OP_ARGS]) { TCGArg a0, a1, a2, a3, a4, a5; int c; switch (opc) { case INDEX_op_goto_ptr: tcg_out_b_reg(s, COND_AL, args[0]); break; case INDEX_op_br: tcg_out_goto_label(s, COND_AL, arg_label(args[0])); break; case INDEX_op_ld8u_i32: tcg_out_ld8u(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_ld8s_i32: tcg_out_ld8s(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_ld16u_i32: tcg_out_ld16u(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_ld16s_i32: tcg_out_ld16s(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_ld_i32: tcg_out_ld32u(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_st8_i32: tcg_out_st8(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_st16_i32: tcg_out_st16(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_st_i32: tcg_out_st32(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_movcond_i32: /* Constraints mean that v2 is always in the same register as dest, * so we only need to do "if condition passed, move v1 to dest". */ tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, args[1], args[2], const_args[2]); tcg_out_dat_rIK(s, tcg_cond_to_arm_cond[args[5]], ARITH_MOV, ARITH_MVN, args[0], 0, args[3], const_args[3]); break; case INDEX_op_add_i32: tcg_out_dat_rIN(s, COND_AL, ARITH_ADD, ARITH_SUB, args[0], args[1], args[2], const_args[2]); break; case INDEX_op_sub_i32: if (const_args[1]) { if (const_args[2]) { tcg_out_movi32(s, COND_AL, args[0], args[1] - args[2]); } else { tcg_out_dat_rI(s, COND_AL, ARITH_RSB, args[0], args[2], args[1], 1); } } else { tcg_out_dat_rIN(s, COND_AL, ARITH_SUB, ARITH_ADD, args[0], args[1], args[2], const_args[2]); } break; case INDEX_op_and_i32: tcg_out_dat_rIK(s, COND_AL, ARITH_AND, ARITH_BIC, args[0], args[1], args[2], const_args[2]); break; case INDEX_op_andc_i32: tcg_out_dat_rIK(s, COND_AL, ARITH_BIC, ARITH_AND, args[0], args[1], args[2], const_args[2]); break; case INDEX_op_or_i32: c = ARITH_ORR; goto gen_arith; case INDEX_op_xor_i32: c = ARITH_EOR; /* Fall through. */ gen_arith: tcg_out_dat_rI(s, COND_AL, c, args[0], args[1], args[2], const_args[2]); break; case INDEX_op_add2_i32: a0 = args[0], a1 = args[1], a2 = args[2]; a3 = args[3], a4 = args[4], a5 = args[5]; if (a0 == a3 || (a0 == a5 && !const_args[5])) { a0 = TCG_REG_TMP; } tcg_out_dat_rIN(s, COND_AL, ARITH_ADD | TO_CPSR, ARITH_SUB | TO_CPSR, a0, a2, a4, const_args[4]); tcg_out_dat_rIK(s, COND_AL, ARITH_ADC, ARITH_SBC, a1, a3, a5, const_args[5]); tcg_out_mov_reg(s, COND_AL, args[0], a0); break; case INDEX_op_sub2_i32: a0 = args[0], a1 = args[1], a2 = args[2]; a3 = args[3], a4 = args[4], a5 = args[5]; if ((a0 == a3 && !const_args[3]) || (a0 == a5 && !const_args[5])) { a0 = TCG_REG_TMP; } if (const_args[2]) { if (const_args[4]) { tcg_out_movi32(s, COND_AL, a0, a4); a4 = a0; } tcg_out_dat_rI(s, COND_AL, ARITH_RSB | TO_CPSR, a0, a4, a2, 1); } else { tcg_out_dat_rIN(s, COND_AL, ARITH_SUB | TO_CPSR, ARITH_ADD | TO_CPSR, a0, a2, a4, const_args[4]); } if (const_args[3]) { if (const_args[5]) { tcg_out_movi32(s, COND_AL, a1, a5); a5 = a1; } tcg_out_dat_rI(s, COND_AL, ARITH_RSC, a1, a5, a3, 1); } else { tcg_out_dat_rIK(s, COND_AL, ARITH_SBC, ARITH_ADC, a1, a3, a5, const_args[5]); } tcg_out_mov_reg(s, COND_AL, args[0], a0); break; case INDEX_op_neg_i32: tcg_out_dat_imm(s, COND_AL, ARITH_RSB, args[0], args[1], 0); break; case INDEX_op_not_i32: tcg_out_dat_reg(s, COND_AL, ARITH_MVN, args[0], 0, args[1], SHIFT_IMM_LSL(0)); break; case INDEX_op_mul_i32: tcg_out_mul32(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_mulu2_i32: tcg_out_umull32(s, COND_AL, args[0], args[1], args[2], args[3]); break; case INDEX_op_muls2_i32: tcg_out_smull32(s, COND_AL, args[0], args[1], args[2], args[3]); break; /* XXX: Perhaps args[2] & 0x1f is wrong */ case INDEX_op_shl_i32: c = const_args[2] ? SHIFT_IMM_LSL(args[2] & 0x1f) : SHIFT_REG_LSL(args[2]); goto gen_shift32; case INDEX_op_shr_i32: c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_LSR(args[2] & 0x1f) : SHIFT_IMM_LSL(0) : SHIFT_REG_LSR(args[2]); goto gen_shift32; case INDEX_op_sar_i32: c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ASR(args[2] & 0x1f) : SHIFT_IMM_LSL(0) : SHIFT_REG_ASR(args[2]); goto gen_shift32; case INDEX_op_rotr_i32: c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ROR(args[2] & 0x1f) : SHIFT_IMM_LSL(0) : SHIFT_REG_ROR(args[2]); /* Fall through. */ gen_shift32: tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], c); break; case INDEX_op_rotl_i32: if (const_args[2]) { tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], ((0x20 - args[2]) & 0x1f) ? SHIFT_IMM_ROR((0x20 - args[2]) & 0x1f) : SHIFT_IMM_LSL(0)); } else { tcg_out_dat_imm(s, COND_AL, ARITH_RSB, TCG_REG_TMP, args[2], 0x20); tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], SHIFT_REG_ROR(TCG_REG_TMP)); } break; case INDEX_op_ctz_i32: tcg_out_dat_reg(s, COND_AL, INSN_RBIT, TCG_REG_TMP, 0, args[1], 0); a1 = TCG_REG_TMP; goto do_clz; case INDEX_op_clz_i32: a1 = args[1]; do_clz: a0 = args[0]; a2 = args[2]; c = const_args[2]; if (c && a2 == 32) { tcg_out_dat_reg(s, COND_AL, INSN_CLZ, a0, 0, a1, 0); break; } tcg_out_dat_imm(s, COND_AL, ARITH_CMP, 0, a1, 0); tcg_out_dat_reg(s, COND_NE, INSN_CLZ, a0, 0, a1, 0); if (c || a0 != a2) { tcg_out_dat_rIK(s, COND_EQ, ARITH_MOV, ARITH_MVN, a0, 0, a2, c); } break; case INDEX_op_brcond_i32: tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, args[0], args[1], const_args[1]); tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[2]], arg_label(args[3])); break; case INDEX_op_setcond_i32: tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, args[1], args[2], const_args[2]); tcg_out_dat_imm(s, tcg_cond_to_arm_cond[args[3]], ARITH_MOV, args[0], 0, 1); tcg_out_dat_imm(s, tcg_cond_to_arm_cond[tcg_invert_cond(args[3])], ARITH_MOV, args[0], 0, 0); break; case INDEX_op_brcond2_i32: c = tcg_out_cmp2(s, args, const_args); tcg_out_goto_label(s, tcg_cond_to_arm_cond[c], arg_label(args[5])); break; case INDEX_op_setcond2_i32: c = tcg_out_cmp2(s, args + 1, const_args + 1); tcg_out_dat_imm(s, tcg_cond_to_arm_cond[c], ARITH_MOV, args[0], 0, 1); tcg_out_dat_imm(s, tcg_cond_to_arm_cond[tcg_invert_cond(c)], ARITH_MOV, args[0], 0, 0); break; case INDEX_op_qemu_ld_i32: tcg_out_qemu_ld(s, args, 0); break; case INDEX_op_qemu_ld_i64: tcg_out_qemu_ld(s, args, 1); break; case INDEX_op_qemu_st_i32: tcg_out_qemu_st(s, args, 0); break; case INDEX_op_qemu_st_i64: tcg_out_qemu_st(s, args, 1); break; case INDEX_op_bswap16_i32: tcg_out_bswap16(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_bswap32_i32: tcg_out_bswap32(s, COND_AL, args[0], args[1]); break; case INDEX_op_deposit_i32: tcg_out_deposit(s, COND_AL, args[0], args[2], args[3], args[4], const_args[2]); break; case INDEX_op_extract_i32: tcg_out_extract(s, COND_AL, args[0], args[1], args[2], args[3]); break; case INDEX_op_sextract_i32: tcg_out_sextract(s, COND_AL, args[0], args[1], args[2], args[3]); break; case INDEX_op_extract2_i32: /* ??? These optimization vs zero should be generic. */ /* ??? But we can't substitute 2 for 1 in the opcode stream yet. */ if (const_args[1]) { if (const_args[2]) { tcg_out_movi(s, TCG_TYPE_REG, args[0], 0); } else { tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[2], SHIFT_IMM_LSL(32 - args[3])); } } else if (const_args[2]) { tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], SHIFT_IMM_LSR(args[3])); } else { /* We can do extract2 in 2 insns, vs the 3 required otherwise. */ tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_TMP, 0, args[2], SHIFT_IMM_LSL(32 - args[3])); tcg_out_dat_reg(s, COND_AL, ARITH_ORR, args[0], TCG_REG_TMP, args[1], SHIFT_IMM_LSR(args[3])); } break; case INDEX_op_div_i32: tcg_out_sdiv(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_divu_i32: tcg_out_udiv(s, COND_AL, args[0], args[1], args[2]); break; case INDEX_op_mb: tcg_out_mb(s, args[0]); break; case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ case INDEX_op_call: /* Always emitted via tcg_out_call. */ case INDEX_op_exit_tb: /* Always emitted via tcg_out_exit_tb. */ case INDEX_op_goto_tb: /* Always emitted via tcg_out_goto_tb. */ case INDEX_op_ext8s_i32: /* Always emitted via tcg_reg_alloc_op. */ case INDEX_op_ext8u_i32: case INDEX_op_ext16s_i32: case INDEX_op_ext16u_i32: default: g_assert_not_reached(); } } static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op) { switch (op) { case INDEX_op_goto_ptr: return C_O0_I1(r); case INDEX_op_ld8u_i32: case INDEX_op_ld8s_i32: case INDEX_op_ld16u_i32: case INDEX_op_ld16s_i32: case INDEX_op_ld_i32: case INDEX_op_neg_i32: case INDEX_op_not_i32: case INDEX_op_bswap16_i32: case INDEX_op_bswap32_i32: case INDEX_op_ext8s_i32: case INDEX_op_ext16s_i32: case INDEX_op_ext16u_i32: case INDEX_op_extract_i32: case INDEX_op_sextract_i32: return C_O1_I1(r, r); case INDEX_op_st8_i32: case INDEX_op_st16_i32: case INDEX_op_st_i32: return C_O0_I2(r, r); case INDEX_op_add_i32: case INDEX_op_sub_i32: case INDEX_op_setcond_i32: return C_O1_I2(r, r, rIN); case INDEX_op_and_i32: case INDEX_op_andc_i32: case INDEX_op_clz_i32: case INDEX_op_ctz_i32: return C_O1_I2(r, r, rIK); case INDEX_op_mul_i32: case INDEX_op_div_i32: case INDEX_op_divu_i32: return C_O1_I2(r, r, r); case INDEX_op_mulu2_i32: case INDEX_op_muls2_i32: return C_O2_I2(r, r, r, r); case INDEX_op_or_i32: case INDEX_op_xor_i32: return C_O1_I2(r, r, rI); case INDEX_op_shl_i32: case INDEX_op_shr_i32: case INDEX_op_sar_i32: case INDEX_op_rotl_i32: case INDEX_op_rotr_i32: return C_O1_I2(r, r, ri); case INDEX_op_brcond_i32: return C_O0_I2(r, rIN); case INDEX_op_deposit_i32: return C_O1_I2(r, 0, rZ); case INDEX_op_extract2_i32: return C_O1_I2(r, rZ, rZ); case INDEX_op_movcond_i32: return C_O1_I4(r, r, rIN, rIK, 0); case INDEX_op_add2_i32: return C_O2_I4(r, r, r, r, rIN, rIK); case INDEX_op_sub2_i32: return C_O2_I4(r, r, rI, rI, rIN, rIK); case INDEX_op_brcond2_i32: return C_O0_I4(r, r, rI, rI); case INDEX_op_setcond2_i32: return C_O1_I4(r, r, r, rI, rI); case INDEX_op_qemu_ld_i32: return TARGET_LONG_BITS == 32 ? C_O1_I1(r, l) : C_O1_I2(r, l, l); case INDEX_op_qemu_ld_i64: return TARGET_LONG_BITS == 32 ? C_O2_I1(e, p, l) : C_O2_I2(e, p, l, l); case INDEX_op_qemu_st_i32: return TARGET_LONG_BITS == 32 ? C_O0_I2(s, s) : C_O0_I3(s, s, s); case INDEX_op_qemu_st_i64: return TARGET_LONG_BITS == 32 ? C_O0_I3(S, p, s) : C_O0_I4(S, p, s, s); case INDEX_op_st_vec: return C_O0_I2(w, r); case INDEX_op_ld_vec: case INDEX_op_dupm_vec: return C_O1_I1(w, r); case INDEX_op_dup_vec: return C_O1_I1(w, wr); case INDEX_op_abs_vec: case INDEX_op_neg_vec: case INDEX_op_not_vec: case INDEX_op_shli_vec: case INDEX_op_shri_vec: case INDEX_op_sari_vec: return C_O1_I1(w, w); case INDEX_op_dup2_vec: case INDEX_op_add_vec: case INDEX_op_mul_vec: case INDEX_op_smax_vec: case INDEX_op_smin_vec: case INDEX_op_ssadd_vec: case INDEX_op_sssub_vec: case INDEX_op_sub_vec: case INDEX_op_umax_vec: case INDEX_op_umin_vec: case INDEX_op_usadd_vec: case INDEX_op_ussub_vec: case INDEX_op_xor_vec: case INDEX_op_arm_sshl_vec: case INDEX_op_arm_ushl_vec: return C_O1_I2(w, w, w); case INDEX_op_arm_sli_vec: return C_O1_I2(w, 0, w); case INDEX_op_or_vec: case INDEX_op_andc_vec: return C_O1_I2(w, w, wO); case INDEX_op_and_vec: case INDEX_op_orc_vec: return C_O1_I2(w, w, wV); case INDEX_op_cmp_vec: return C_O1_I2(w, w, wZ); case INDEX_op_bitsel_vec: return C_O1_I3(w, w, w, w); default: g_assert_not_reached(); } } static void tcg_target_init(TCGContext *s) { /* * Only probe for the platform and capabilities if we haven't already * determined maximum values at compile time. */ #if !defined(use_idiv_instructions) || !defined(use_neon_instructions) { unsigned long hwcap = qemu_getauxval(AT_HWCAP); #ifndef use_idiv_instructions use_idiv_instructions = (hwcap & HWCAP_ARM_IDIVA) != 0; #endif #ifndef use_neon_instructions use_neon_instructions = (hwcap & HWCAP_ARM_NEON) != 0; #endif } #endif if (__ARM_ARCH < 7) { const char *pl = (const char *)qemu_getauxval(AT_PLATFORM); if (pl != NULL && pl[0] == 'v' && pl[1] >= '4' && pl[1] <= '9') { arm_arch = pl[1] - '0'; } if (arm_arch < 6) { error_report("TCG: ARMv%d is unsupported; exiting", arm_arch); exit(EXIT_FAILURE); } } tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS; tcg_target_call_clobber_regs = 0; tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R12); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14); if (use_neon_instructions) { tcg_target_available_regs[TCG_TYPE_V64] = ALL_VECTOR_REGS; tcg_target_available_regs[TCG_TYPE_V128] = ALL_VECTOR_REGS; tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q0); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q1); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q2); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q3); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q8); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q9); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q10); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q11); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q12); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q13); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q14); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_Q15); } s->reserved_regs = 0; tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP); tcg_regset_set_reg(s->reserved_regs, TCG_REG_PC); tcg_regset_set_reg(s->reserved_regs, TCG_VEC_TMP); } static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1, intptr_t arg2) { switch (type) { case TCG_TYPE_I32: tcg_out_ld32u(s, COND_AL, arg, arg1, arg2); return; case TCG_TYPE_V64: /* regs 1; size 8; align 8 */ tcg_out_vldst(s, INSN_VLD1 | 0x7d0, arg, arg1, arg2); return; case TCG_TYPE_V128: /* * We have only 8-byte alignment for the stack per the ABI. * Rather than dynamically re-align the stack, it's easier * to simply not request alignment beyond that. So: * regs 2; size 8; align 8 */ tcg_out_vldst(s, INSN_VLD1 | 0xad0, arg, arg1, arg2); return; default: g_assert_not_reached(); } } static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1, intptr_t arg2) { switch (type) { case TCG_TYPE_I32: tcg_out_st32(s, COND_AL, arg, arg1, arg2); return; case TCG_TYPE_V64: /* regs 1; size 8; align 8 */ tcg_out_vldst(s, INSN_VST1 | 0x7d0, arg, arg1, arg2); return; case TCG_TYPE_V128: /* See tcg_out_ld re alignment: regs 2; size 8; align 8 */ tcg_out_vldst(s, INSN_VST1 | 0xad0, arg, arg1, arg2); return; default: g_assert_not_reached(); } } static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, TCGReg base, intptr_t ofs) { return false; } static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) { if (ret == arg) { return true; } switch (type) { case TCG_TYPE_I32: if (ret < TCG_REG_Q0 && arg < TCG_REG_Q0) { tcg_out_mov_reg(s, COND_AL, ret, arg); return true; } return false; case TCG_TYPE_V64: case TCG_TYPE_V128: /* "VMOV D,N" is an alias for "VORR D,N,N". */ tcg_out_vreg3(s, INSN_VORR, type - TCG_TYPE_V64, 0, ret, arg, arg); return true; default: g_assert_not_reached(); } } static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg ret, tcg_target_long arg) { tcg_debug_assert(type == TCG_TYPE_I32); tcg_debug_assert(ret < TCG_REG_Q0); tcg_out_movi32(s, COND_AL, ret, arg); } static void tcg_out_addi_ptr(TCGContext *s, TCGReg rd, TCGReg rs, tcg_target_long imm) { int enc, opc = ARITH_ADD; /* All of the easiest immediates to encode are positive. */ if (imm < 0) { imm = -imm; opc = ARITH_SUB; } enc = encode_imm(imm); if (enc >= 0) { tcg_out_dat_imm(s, COND_AL, opc, rd, rs, enc); } else { tcg_out_movi32(s, COND_AL, TCG_REG_TMP, imm); tcg_out_dat_reg(s, COND_AL, opc, rd, rs, TCG_REG_TMP, SHIFT_IMM_LSL(0)); } } /* Type is always V128, with I64 elements. */ static void tcg_out_dup2_vec(TCGContext *s, TCGReg rd, TCGReg rl, TCGReg rh) { /* Move high element into place first. */ /* VMOV Dd+1, Ds */ tcg_out_vreg3(s, INSN_VORR | (1 << 12), 0, 0, rd, rh, rh); /* Move low element into place; tcg_out_mov will check for nop. */ tcg_out_mov(s, TCG_TYPE_V64, rd, rl); } static bool tcg_out_dup_vec(TCGContext *s, TCGType type, unsigned vece, TCGReg rd, TCGReg rs) { int q = type - TCG_TYPE_V64; if (vece == MO_64) { if (type == TCG_TYPE_V128) { tcg_out_dup2_vec(s, rd, rs, rs); } else { tcg_out_mov(s, TCG_TYPE_V64, rd, rs); } } else if (rs < TCG_REG_Q0) { int b = (vece == MO_8); int e = (vece == MO_16); tcg_out32(s, INSN_VDUP_G | (b << 22) | (q << 21) | (e << 5) | encode_vn(rd) | (rs << 12)); } else { int imm4 = 1 << vece; tcg_out32(s, INSN_VDUP_S | (imm4 << 16) | (q << 6) | encode_vd(rd) | encode_vm(rs)); } return true; } static bool tcg_out_dupm_vec(TCGContext *s, TCGType type, unsigned vece, TCGReg rd, TCGReg base, intptr_t offset) { if (vece == MO_64) { tcg_out_ld(s, TCG_TYPE_V64, rd, base, offset); if (type == TCG_TYPE_V128) { tcg_out_dup2_vec(s, rd, rd, rd); } } else { int q = type - TCG_TYPE_V64; tcg_out_vldst(s, INSN_VLD1R | (vece << 6) | (q << 5), rd, base, offset); } return true; } static void tcg_out_dupi_vec(TCGContext *s, TCGType type, unsigned vece, TCGReg rd, int64_t v64) { int q = type - TCG_TYPE_V64; int cmode, imm8, i; /* Test all bytes equal first. */ if (vece == MO_8) { tcg_out_vmovi(s, rd, q, 0, 0xe, v64); return; } /* * Test all bytes 0x00 or 0xff second. This can match cases that * might otherwise take 2 or 3 insns for MO_16 or MO_32 below. */ for (i = imm8 = 0; i < 8; i++) { uint8_t byte = v64 >> (i * 8); if (byte == 0xff) { imm8 |= 1 << i; } else if (byte != 0) { goto fail_bytes; } } tcg_out_vmovi(s, rd, q, 1, 0xe, imm8); return; fail_bytes: /* * Tests for various replications. For each element width, if we * cannot find an expansion there's no point checking a larger * width because we already know by replication it cannot match. */ if (vece == MO_16) { uint16_t v16 = v64; if (is_shimm16(v16, &cmode, &imm8)) { tcg_out_vmovi(s, rd, q, 0, cmode, imm8); return; } if (is_shimm16(~v16, &cmode, &imm8)) { tcg_out_vmovi(s, rd, q, 1, cmode, imm8); return; } /* * Otherwise, all remaining constants can be loaded in two insns: * rd = v16 & 0xff, rd |= v16 & 0xff00. */ tcg_out_vmovi(s, rd, q, 0, 0x8, v16 & 0xff); tcg_out_vmovi(s, rd, q, 0, 0xb, v16 >> 8); /* VORRI */ return; } if (vece == MO_32) { uint32_t v32 = v64; if (is_shimm32(v32, &cmode, &imm8) || is_soimm32(v32, &cmode, &imm8)) { tcg_out_vmovi(s, rd, q, 0, cmode, imm8); return; } if (is_shimm32(~v32, &cmode, &imm8) || is_soimm32(~v32, &cmode, &imm8)) { tcg_out_vmovi(s, rd, q, 1, cmode, imm8); return; } /* * Restrict the set of constants to those we can load with * two instructions. Others we load from the pool. */ i = is_shimm32_pair(v32, &cmode, &imm8); if (i) { tcg_out_vmovi(s, rd, q, 0, cmode, imm8); tcg_out_vmovi(s, rd, q, 0, i | 1, extract32(v32, i * 4, 8)); return; } i = is_shimm32_pair(~v32, &cmode, &imm8); if (i) { tcg_out_vmovi(s, rd, q, 1, cmode, imm8); tcg_out_vmovi(s, rd, q, 1, i | 1, extract32(~v32, i * 4, 8)); return; } } /* * As a last resort, load from the constant pool. */ if (!q || vece == MO_64) { new_pool_l2(s, R_ARM_PC11, s->code_ptr, 0, v64, v64 >> 32); /* VLDR Dd, [pc + offset] */ tcg_out32(s, INSN_VLDR_D | encode_vd(rd) | (0xf << 16)); if (q) { tcg_out_dup2_vec(s, rd, rd, rd); } } else { new_pool_label(s, (uint32_t)v64, R_ARM_PC8, s->code_ptr, 0); /* add tmp, pc, offset */ tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_TMP, TCG_REG_PC, 0); tcg_out_dupm_vec(s, type, MO_32, rd, TCG_REG_TMP, 0); } } static const ARMInsn vec_cmp_insn[16] = { [TCG_COND_EQ] = INSN_VCEQ, [TCG_COND_GT] = INSN_VCGT, [TCG_COND_GE] = INSN_VCGE, [TCG_COND_GTU] = INSN_VCGT_U, [TCG_COND_GEU] = INSN_VCGE_U, }; static const ARMInsn vec_cmp0_insn[16] = { [TCG_COND_EQ] = INSN_VCEQ0, [TCG_COND_GT] = INSN_VCGT0, [TCG_COND_GE] = INSN_VCGE0, [TCG_COND_LT] = INSN_VCLT0, [TCG_COND_LE] = INSN_VCLE0, }; static void tcg_out_vec_op(TCGContext *s, TCGOpcode opc, unsigned vecl, unsigned vece, const TCGArg args[TCG_MAX_OP_ARGS], const int const_args[TCG_MAX_OP_ARGS]) { TCGType type = vecl + TCG_TYPE_V64; unsigned q = vecl; TCGArg a0, a1, a2, a3; int cmode, imm8; a0 = args[0]; a1 = args[1]; a2 = args[2]; switch (opc) { case INDEX_op_ld_vec: tcg_out_ld(s, type, a0, a1, a2); return; case INDEX_op_st_vec: tcg_out_st(s, type, a0, a1, a2); return; case INDEX_op_dupm_vec: tcg_out_dupm_vec(s, type, vece, a0, a1, a2); return; case INDEX_op_dup2_vec: tcg_out_dup2_vec(s, a0, a1, a2); return; case INDEX_op_abs_vec: tcg_out_vreg2(s, INSN_VABS, q, vece, a0, a1); return; case INDEX_op_neg_vec: tcg_out_vreg2(s, INSN_VNEG, q, vece, a0, a1); return; case INDEX_op_not_vec: tcg_out_vreg2(s, INSN_VMVN, q, 0, a0, a1); return; case INDEX_op_add_vec: tcg_out_vreg3(s, INSN_VADD, q, vece, a0, a1, a2); return; case INDEX_op_mul_vec: tcg_out_vreg3(s, INSN_VMUL, q, vece, a0, a1, a2); return; case INDEX_op_smax_vec: tcg_out_vreg3(s, INSN_VMAX, q, vece, a0, a1, a2); return; case INDEX_op_smin_vec: tcg_out_vreg3(s, INSN_VMIN, q, vece, a0, a1, a2); return; case INDEX_op_sub_vec: tcg_out_vreg3(s, INSN_VSUB, q, vece, a0, a1, a2); return; case INDEX_op_ssadd_vec: tcg_out_vreg3(s, INSN_VQADD, q, vece, a0, a1, a2); return; case INDEX_op_sssub_vec: tcg_out_vreg3(s, INSN_VQSUB, q, vece, a0, a1, a2); return; case INDEX_op_umax_vec: tcg_out_vreg3(s, INSN_VMAX_U, q, vece, a0, a1, a2); return; case INDEX_op_umin_vec: tcg_out_vreg3(s, INSN_VMIN_U, q, vece, a0, a1, a2); return; case INDEX_op_usadd_vec: tcg_out_vreg3(s, INSN_VQADD_U, q, vece, a0, a1, a2); return; case INDEX_op_ussub_vec: tcg_out_vreg3(s, INSN_VQSUB_U, q, vece, a0, a1, a2); return; case INDEX_op_xor_vec: tcg_out_vreg3(s, INSN_VEOR, q, 0, a0, a1, a2); return; case INDEX_op_arm_sshl_vec: /* * Note that Vm is the data and Vn is the shift count, * therefore the arguments appear reversed. */ tcg_out_vreg3(s, INSN_VSHL_S, q, vece, a0, a2, a1); return; case INDEX_op_arm_ushl_vec: /* See above. */ tcg_out_vreg3(s, INSN_VSHL_U, q, vece, a0, a2, a1); return; case INDEX_op_shli_vec: tcg_out_vshifti(s, INSN_VSHLI, q, a0, a1, a2 + (8 << vece)); return; case INDEX_op_shri_vec: tcg_out_vshifti(s, INSN_VSHRI, q, a0, a1, (16 << vece) - a2); return; case INDEX_op_sari_vec: tcg_out_vshifti(s, INSN_VSARI, q, a0, a1, (16 << vece) - a2); return; case INDEX_op_arm_sli_vec: tcg_out_vshifti(s, INSN_VSLI, q, a0, a2, args[3] + (8 << vece)); return; case INDEX_op_andc_vec: if (!const_args[2]) { tcg_out_vreg3(s, INSN_VBIC, q, 0, a0, a1, a2); return; } a2 = ~a2; /* fall through */ case INDEX_op_and_vec: if (const_args[2]) { is_shimm1632(~a2, &cmode, &imm8); if (a0 == a1) { tcg_out_vmovi(s, a0, q, 1, cmode | 1, imm8); /* VBICI */ return; } tcg_out_vmovi(s, a0, q, 1, cmode, imm8); /* VMVNI */ a2 = a0; } tcg_out_vreg3(s, INSN_VAND, q, 0, a0, a1, a2); return; case INDEX_op_orc_vec: if (!const_args[2]) { tcg_out_vreg3(s, INSN_VORN, q, 0, a0, a1, a2); return; } a2 = ~a2; /* fall through */ case INDEX_op_or_vec: if (const_args[2]) { is_shimm1632(a2, &cmode, &imm8); if (a0 == a1) { tcg_out_vmovi(s, a0, q, 0, cmode | 1, imm8); /* VORRI */ return; } tcg_out_vmovi(s, a0, q, 0, cmode, imm8); /* VMOVI */ a2 = a0; } tcg_out_vreg3(s, INSN_VORR, q, 0, a0, a1, a2); return; case INDEX_op_cmp_vec: { TCGCond cond = args[3]; if (cond == TCG_COND_NE) { if (const_args[2]) { tcg_out_vreg3(s, INSN_VTST, q, vece, a0, a1, a1); } else { tcg_out_vreg3(s, INSN_VCEQ, q, vece, a0, a1, a2); tcg_out_vreg2(s, INSN_VMVN, q, 0, a0, a0); } } else { ARMInsn insn; if (const_args[2]) { insn = vec_cmp0_insn[cond]; if (insn) { tcg_out_vreg2(s, insn, q, vece, a0, a1); return; } tcg_out_dupi_vec(s, type, MO_8, TCG_VEC_TMP, 0); a2 = TCG_VEC_TMP; } insn = vec_cmp_insn[cond]; if (insn == 0) { TCGArg t; t = a1, a1 = a2, a2 = t; cond = tcg_swap_cond(cond); insn = vec_cmp_insn[cond]; tcg_debug_assert(insn != 0); } tcg_out_vreg3(s, insn, q, vece, a0, a1, a2); } } return; case INDEX_op_bitsel_vec: a3 = args[3]; if (a0 == a3) { tcg_out_vreg3(s, INSN_VBIT, q, 0, a0, a2, a1); } else if (a0 == a2) { tcg_out_vreg3(s, INSN_VBIF, q, 0, a0, a3, a1); } else { tcg_out_mov(s, type, a0, a1); tcg_out_vreg3(s, INSN_VBSL, q, 0, a0, a2, a3); } return; case INDEX_op_mov_vec: /* Always emitted via tcg_out_mov. */ case INDEX_op_dup_vec: /* Always emitted via tcg_out_dup_vec. */ default: g_assert_not_reached(); } } int tcg_can_emit_vec_op(TCGOpcode opc, TCGType type, unsigned vece) { switch (opc) { case INDEX_op_add_vec: case INDEX_op_sub_vec: case INDEX_op_and_vec: case INDEX_op_andc_vec: case INDEX_op_or_vec: case INDEX_op_orc_vec: case INDEX_op_xor_vec: case INDEX_op_not_vec: case INDEX_op_shli_vec: case INDEX_op_shri_vec: case INDEX_op_sari_vec: case INDEX_op_ssadd_vec: case INDEX_op_sssub_vec: case INDEX_op_usadd_vec: case INDEX_op_ussub_vec: case INDEX_op_bitsel_vec: return 1; case INDEX_op_abs_vec: case INDEX_op_cmp_vec: case INDEX_op_mul_vec: case INDEX_op_neg_vec: case INDEX_op_smax_vec: case INDEX_op_smin_vec: case INDEX_op_umax_vec: case INDEX_op_umin_vec: return vece < MO_64; case INDEX_op_shlv_vec: case INDEX_op_shrv_vec: case INDEX_op_sarv_vec: case INDEX_op_rotli_vec: case INDEX_op_rotlv_vec: case INDEX_op_rotrv_vec: return -1; default: return 0; } } void tcg_expand_vec_op(TCGOpcode opc, TCGType type, unsigned vece, TCGArg a0, ...) { va_list va; TCGv_vec v0, v1, v2, t1, t2, c1; TCGArg a2; va_start(va, a0); v0 = temp_tcgv_vec(arg_temp(a0)); v1 = temp_tcgv_vec(arg_temp(va_arg(va, TCGArg))); a2 = va_arg(va, TCGArg); va_end(va); switch (opc) { case INDEX_op_shlv_vec: /* * Merely propagate shlv_vec to arm_ushl_vec. * In this way we don't set TCG_TARGET_HAS_shv_vec * because everything is done via expansion. */ v2 = temp_tcgv_vec(arg_temp(a2)); vec_gen_3(INDEX_op_arm_ushl_vec, type, vece, tcgv_vec_arg(v0), tcgv_vec_arg(v1), tcgv_vec_arg(v2)); break; case INDEX_op_shrv_vec: case INDEX_op_sarv_vec: /* Right shifts are negative left shifts for NEON. */ v2 = temp_tcgv_vec(arg_temp(a2)); t1 = tcg_temp_new_vec(type); tcg_gen_neg_vec(vece, t1, v2); if (opc == INDEX_op_shrv_vec) { opc = INDEX_op_arm_ushl_vec; } else { opc = INDEX_op_arm_sshl_vec; } vec_gen_3(opc, type, vece, tcgv_vec_arg(v0), tcgv_vec_arg(v1), tcgv_vec_arg(t1)); tcg_temp_free_vec(t1); break; case INDEX_op_rotli_vec: t1 = tcg_temp_new_vec(type); tcg_gen_shri_vec(vece, t1, v1, -a2 & ((8 << vece) - 1)); vec_gen_4(INDEX_op_arm_sli_vec, type, vece, tcgv_vec_arg(v0), tcgv_vec_arg(t1), tcgv_vec_arg(v1), a2); tcg_temp_free_vec(t1); break; case INDEX_op_rotlv_vec: v2 = temp_tcgv_vec(arg_temp(a2)); t1 = tcg_temp_new_vec(type); c1 = tcg_constant_vec(type, vece, 8 << vece); tcg_gen_sub_vec(vece, t1, v2, c1); /* Right shifts are negative left shifts for NEON. */ vec_gen_3(INDEX_op_arm_ushl_vec, type, vece, tcgv_vec_arg(t1), tcgv_vec_arg(v1), tcgv_vec_arg(t1)); vec_gen_3(INDEX_op_arm_ushl_vec, type, vece, tcgv_vec_arg(v0), tcgv_vec_arg(v1), tcgv_vec_arg(v2)); tcg_gen_or_vec(vece, v0, v0, t1); tcg_temp_free_vec(t1); break; case INDEX_op_rotrv_vec: v2 = temp_tcgv_vec(arg_temp(a2)); t1 = tcg_temp_new_vec(type); t2 = tcg_temp_new_vec(type); c1 = tcg_constant_vec(type, vece, 8 << vece); tcg_gen_neg_vec(vece, t1, v2); tcg_gen_sub_vec(vece, t2, c1, v2); /* Right shifts are negative left shifts for NEON. */ vec_gen_3(INDEX_op_arm_ushl_vec, type, vece, tcgv_vec_arg(t1), tcgv_vec_arg(v1), tcgv_vec_arg(t1)); vec_gen_3(INDEX_op_arm_ushl_vec, type, vece, tcgv_vec_arg(t2), tcgv_vec_arg(v1), tcgv_vec_arg(t2)); tcg_gen_or_vec(vece, v0, t1, t2); tcg_temp_free_vec(t1); tcg_temp_free_vec(t2); break; default: g_assert_not_reached(); } } static void tcg_out_nop_fill(tcg_insn_unit *p, int count) { int i; for (i = 0; i < count; ++i) { p[i] = INSN_NOP; } } /* Compute frame size via macros, to share between tcg_target_qemu_prologue and tcg_register_jit. */ #define PUSH_SIZE ((11 - 4 + 1 + 1) * sizeof(tcg_target_long)) #define FRAME_SIZE \ ((PUSH_SIZE \ + TCG_STATIC_CALL_ARGS_SIZE \ + CPU_TEMP_BUF_NLONGS * sizeof(long) \ + TCG_TARGET_STACK_ALIGN - 1) \ & -TCG_TARGET_STACK_ALIGN) #define STACK_ADDEND (FRAME_SIZE - PUSH_SIZE) static void tcg_target_qemu_prologue(TCGContext *s) { /* Calling convention requires us to save r4-r11 and lr. */ /* stmdb sp!, { r4 - r11, lr } */ tcg_out_ldstm(s, COND_AL, INSN_STMDB, TCG_REG_CALL_STACK, (1 << TCG_REG_R4) | (1 << TCG_REG_R5) | (1 << TCG_REG_R6) | (1 << TCG_REG_R7) | (1 << TCG_REG_R8) | (1 << TCG_REG_R9) | (1 << TCG_REG_R10) | (1 << TCG_REG_R11) | (1 << TCG_REG_R14)); /* Reserve callee argument and tcg temp space. */ tcg_out_dat_rI(s, COND_AL, ARITH_SUB, TCG_REG_CALL_STACK, TCG_REG_CALL_STACK, STACK_ADDEND, 1); tcg_set_frame(s, TCG_REG_CALL_STACK, TCG_STATIC_CALL_ARGS_SIZE, CPU_TEMP_BUF_NLONGS * sizeof(long)); tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); #ifndef CONFIG_SOFTMMU if (guest_base) { tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_GUEST_BASE, guest_base); tcg_regset_set_reg(s->reserved_regs, TCG_REG_GUEST_BASE); } #endif tcg_out_b_reg(s, COND_AL, tcg_target_call_iarg_regs[1]); /* * Return path for goto_ptr. Set return value to 0, a-la exit_tb, * and fall through to the rest of the epilogue. */ tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr); tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, 0); tcg_out_epilogue(s); } static void tcg_out_epilogue(TCGContext *s) { /* Release local stack frame. */ tcg_out_dat_rI(s, COND_AL, ARITH_ADD, TCG_REG_CALL_STACK, TCG_REG_CALL_STACK, STACK_ADDEND, 1); /* ldmia sp!, { r4 - r11, pc } */ tcg_out_ldstm(s, COND_AL, INSN_LDMIA, TCG_REG_CALL_STACK, (1 << TCG_REG_R4) | (1 << TCG_REG_R5) | (1 << TCG_REG_R6) | (1 << TCG_REG_R7) | (1 << TCG_REG_R8) | (1 << TCG_REG_R9) | (1 << TCG_REG_R10) | (1 << TCG_REG_R11) | (1 << TCG_REG_PC)); } typedef struct { DebugFrameHeader h; uint8_t fde_def_cfa[4]; uint8_t fde_reg_ofs[18]; } DebugFrame; #define ELF_HOST_MACHINE EM_ARM /* We're expecting a 2 byte uleb128 encoded value. */ QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14)); static const DebugFrame debug_frame = { .h.cie.len = sizeof(DebugFrameCIE)-4, /* length after .len member */ .h.cie.id = -1, .h.cie.version = 1, .h.cie.code_align = 1, .h.cie.data_align = 0x7c, /* sleb128 -4 */ .h.cie.return_column = 14, /* Total FDE size does not include the "len" member. */ .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), .fde_def_cfa = { 12, 13, /* DW_CFA_def_cfa sp, ... */ (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ (FRAME_SIZE >> 7) }, .fde_reg_ofs = { /* The following must match the stmdb in the prologue. */ 0x8e, 1, /* DW_CFA_offset, lr, -4 */ 0x8b, 2, /* DW_CFA_offset, r11, -8 */ 0x8a, 3, /* DW_CFA_offset, r10, -12 */ 0x89, 4, /* DW_CFA_offset, r9, -16 */ 0x88, 5, /* DW_CFA_offset, r8, -20 */ 0x87, 6, /* DW_CFA_offset, r7, -24 */ 0x86, 7, /* DW_CFA_offset, r6, -28 */ 0x85, 8, /* DW_CFA_offset, r5, -32 */ 0x84, 9, /* DW_CFA_offset, r4, -36 */ } }; void tcg_register_jit(const void *buf, size_t buf_size) { tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); }