/* * Tiny Code Generator for QEMU * * Copyright (c) 2021 WANG Xuerui * * Based on tcg/riscv/tcg-target.c.inc * * Copyright (c) 2018 SiFive, Inc * Copyright (c) 2008-2009 Arnaud Patard * Copyright (c) 2009 Aurelien Jarno * Copyright (c) 2008 Fabrice Bellard * * 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 "../tcg-ldst.c.inc" #ifdef CONFIG_DEBUG_TCG static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { "zero", "ra", "tp", "sp", "a0", "a1", "a2", "a3", "a4", "a5", "a6", "a7", "t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "r21", /* reserved in the LP64* ABI, hence no ABI name */ "s9", "s0", "s1", "s2", "s3", "s4", "s5", "s6", "s7", "s8" }; #endif static const int tcg_target_reg_alloc_order[] = { /* Registers preserved across calls */ /* TCG_REG_S0 reserved for TCG_AREG0 */ TCG_REG_S1, TCG_REG_S2, TCG_REG_S3, TCG_REG_S4, TCG_REG_S5, TCG_REG_S6, TCG_REG_S7, TCG_REG_S8, TCG_REG_S9, /* Registers (potentially) clobbered across calls */ TCG_REG_T0, TCG_REG_T1, TCG_REG_T2, TCG_REG_T3, TCG_REG_T4, TCG_REG_T5, TCG_REG_T6, TCG_REG_T7, TCG_REG_T8, /* Argument registers, opposite order of allocation. */ TCG_REG_A7, TCG_REG_A6, TCG_REG_A5, TCG_REG_A4, TCG_REG_A3, TCG_REG_A2, TCG_REG_A1, TCG_REG_A0, }; static const int tcg_target_call_iarg_regs[] = { TCG_REG_A0, TCG_REG_A1, TCG_REG_A2, TCG_REG_A3, TCG_REG_A4, TCG_REG_A5, TCG_REG_A6, TCG_REG_A7, }; static const int tcg_target_call_oarg_regs[] = { TCG_REG_A0, TCG_REG_A1, }; #ifndef CONFIG_SOFTMMU #define USE_GUEST_BASE (guest_base != 0) #define TCG_GUEST_BASE_REG TCG_REG_S1 #endif #define TCG_CT_CONST_ZERO 0x100 #define TCG_CT_CONST_S12 0x200 #define TCG_CT_CONST_S32 0x400 #define TCG_CT_CONST_U12 0x800 #define TCG_CT_CONST_C12 0x1000 #define TCG_CT_CONST_WSZ 0x2000 #define ALL_GENERAL_REGS MAKE_64BIT_MASK(0, 32) /* * For softmmu, we need to avoid conflicts with the first 5 * argument registers to call the helper. Some of these are * also used for the tlb lookup. */ #ifdef CONFIG_SOFTMMU #define SOFTMMU_RESERVE_REGS MAKE_64BIT_MASK(TCG_REG_A0, 5) #else #define SOFTMMU_RESERVE_REGS 0 #endif static inline tcg_target_long sextreg(tcg_target_long val, int pos, int len) { return sextract64(val, pos, len); } /* test if a constant matches the constraint */ static bool tcg_target_const_match(int64_t val, TCGType type, int ct) { if (ct & TCG_CT_CONST) { return true; } if ((ct & TCG_CT_CONST_ZERO) && val == 0) { return true; } if ((ct & TCG_CT_CONST_S12) && val == sextreg(val, 0, 12)) { return true; } if ((ct & TCG_CT_CONST_S32) && val == (int32_t)val) { return true; } if ((ct & TCG_CT_CONST_U12) && val >= 0 && val <= 0xfff) { return true; } if ((ct & TCG_CT_CONST_C12) && ~val >= 0 && ~val <= 0xfff) { return true; } if ((ct & TCG_CT_CONST_WSZ) && val == (type == TCG_TYPE_I32 ? 32 : 64)) { return true; } return false; } /* * Relocations */ /* * Relocation records defined in LoongArch ELF psABI v1.00 is way too * complicated; a whopping stack machine is needed to stuff the fields, at * the very least one SOP_PUSH and one SOP_POP (of the correct format) are * needed. * * Hence, define our own simpler relocation types. Numbers are chosen as to * not collide with potential future additions to the true ELF relocation * type enum. */ /* Field Sk16, shifted right by 2; suitable for conditional jumps */ #define R_LOONGARCH_BR_SK16 256 /* Field Sd10k16, shifted right by 2; suitable for B and BL */ #define R_LOONGARCH_BR_SD10K16 257 static bool reloc_br_sk16(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); intptr_t offset = (intptr_t)target - (intptr_t)src_rx; tcg_debug_assert((offset & 3) == 0); offset >>= 2; if (offset == sextreg(offset, 0, 16)) { *src_rw = deposit64(*src_rw, 10, 16, offset); return true; } return false; } static bool reloc_br_sd10k16(tcg_insn_unit *src_rw, const tcg_insn_unit *target) { const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); intptr_t offset = (intptr_t)target - (intptr_t)src_rx; tcg_debug_assert((offset & 3) == 0); offset >>= 2; if (offset == sextreg(offset, 0, 26)) { *src_rw = deposit64(*src_rw, 0, 10, offset >> 16); /* slot d10 */ *src_rw = deposit64(*src_rw, 10, 16, offset); /* slot k16 */ 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_LOONGARCH_BR_SK16: return reloc_br_sk16(code_ptr, (tcg_insn_unit *)value); case R_LOONGARCH_BR_SD10K16: return reloc_br_sd10k16(code_ptr, (tcg_insn_unit *)value); default: g_assert_not_reached(); } } #include "tcg-insn-defs.c.inc" /* * TCG intrinsics */ static void tcg_out_mb(TCGContext *s, TCGArg a0) { /* Baseline LoongArch only has the full barrier, unfortunately. */ tcg_out_opc_dbar(s, 0); } static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) { if (ret == arg) { return true; } switch (type) { case TCG_TYPE_I32: case TCG_TYPE_I64: /* * Conventional register-register move used in LoongArch is * `or dst, src, zero`. */ tcg_out_opc_or(s, ret, arg, TCG_REG_ZERO); break; default: g_assert_not_reached(); } return true; } /* Loads a 32-bit immediate into rd, sign-extended. */ static void tcg_out_movi_i32(TCGContext *s, TCGReg rd, int32_t val) { tcg_target_long lo = sextreg(val, 0, 12); tcg_target_long hi12 = sextreg(val, 12, 20); /* Single-instruction cases. */ if (hi12 == 0) { /* val fits in uimm12: ori rd, zero, val */ tcg_out_opc_ori(s, rd, TCG_REG_ZERO, val); return; } if (hi12 == sextreg(lo, 12, 20)) { /* val fits in simm12: addi.w rd, zero, val */ tcg_out_opc_addi_w(s, rd, TCG_REG_ZERO, val); return; } /* High bits must be set; load with lu12i.w + optional ori. */ tcg_out_opc_lu12i_w(s, rd, hi12); if (lo != 0) { tcg_out_opc_ori(s, rd, rd, lo & 0xfff); } } static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd, tcg_target_long val) { /* * LoongArch conventionally loads 64-bit immediates in at most 4 steps, * with dedicated instructions for filling the respective bitfields * below: * * 6 5 4 3 * 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 * +-----------------------+---------------------------------------+... * | hi52 | hi32 | * +-----------------------+---------------------------------------+... * 3 2 1 * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 * ...+-------------------------------------+-------------------------+ * | hi12 | lo | * ...+-------------------------------------+-------------------------+ * * Check if val belong to one of the several fast cases, before falling * back to the slow path. */ intptr_t pc_offset; tcg_target_long val_lo, val_hi, pc_hi, offset_hi; tcg_target_long hi12, hi32, hi52; /* Value fits in signed i32. */ if (type == TCG_TYPE_I32 || val == (int32_t)val) { tcg_out_movi_i32(s, rd, val); return; } /* PC-relative cases. */ pc_offset = tcg_pcrel_diff(s, (void *)val); if (pc_offset == sextreg(pc_offset, 0, 22) && (pc_offset & 3) == 0) { /* Single pcaddu2i. */ tcg_out_opc_pcaddu2i(s, rd, pc_offset >> 2); return; } if (pc_offset == (int32_t)pc_offset) { /* Offset within 32 bits; load with pcalau12i + ori. */ val_lo = sextreg(val, 0, 12); val_hi = val >> 12; pc_hi = (val - pc_offset) >> 12; offset_hi = val_hi - pc_hi; tcg_debug_assert(offset_hi == sextreg(offset_hi, 0, 20)); tcg_out_opc_pcalau12i(s, rd, offset_hi); if (val_lo != 0) { tcg_out_opc_ori(s, rd, rd, val_lo & 0xfff); } return; } hi12 = sextreg(val, 12, 20); hi32 = sextreg(val, 32, 20); hi52 = sextreg(val, 52, 12); /* Single cu52i.d case. */ if ((hi52 != 0) && (ctz64(val) >= 52)) { tcg_out_opc_cu52i_d(s, rd, TCG_REG_ZERO, hi52); return; } /* Slow path. Initialize the low 32 bits, then concat high bits. */ tcg_out_movi_i32(s, rd, val); /* Load hi32 and hi52 explicitly when they are unexpected values. */ if (hi32 != sextreg(hi12, 20, 20)) { tcg_out_opc_cu32i_d(s, rd, hi32); } if (hi52 != sextreg(hi32, 20, 12)) { tcg_out_opc_cu52i_d(s, rd, rd, hi52); } } static void tcg_out_addi(TCGContext *s, TCGType type, TCGReg rd, TCGReg rs, tcg_target_long imm) { tcg_target_long lo12 = sextreg(imm, 0, 12); tcg_target_long hi16 = sextreg(imm - lo12, 16, 16); /* * Note that there's a hole in between hi16 and lo12: * * 3 2 1 0 * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 * ...+-------------------------------+-------+-----------------------+ * | hi16 | | lo12 | * ...+-------------------------------+-------+-----------------------+ * * For bits within that hole, it's more efficient to use LU12I and ADD. */ if (imm == (hi16 << 16) + lo12) { if (hi16) { tcg_out_opc_addu16i_d(s, rd, rs, hi16); rs = rd; } if (type == TCG_TYPE_I32) { tcg_out_opc_addi_w(s, rd, rs, lo12); } else if (lo12) { tcg_out_opc_addi_d(s, rd, rs, lo12); } else { tcg_out_mov(s, type, rd, rs); } } else { tcg_out_movi(s, type, TCG_REG_TMP0, imm); if (type == TCG_TYPE_I32) { tcg_out_opc_add_w(s, rd, rs, TCG_REG_TMP0); } else { tcg_out_opc_add_d(s, rd, rs, TCG_REG_TMP0); } } } static void tcg_out_ext8u(TCGContext *s, TCGReg ret, TCGReg arg) { tcg_out_opc_andi(s, ret, arg, 0xff); } static void tcg_out_ext16u(TCGContext *s, TCGReg ret, TCGReg arg) { tcg_out_opc_bstrpick_w(s, ret, arg, 0, 15); } static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg) { tcg_out_opc_bstrpick_d(s, ret, arg, 0, 31); } static void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg) { tcg_out_opc_sext_b(s, ret, arg); } static void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg) { tcg_out_opc_sext_h(s, ret, arg); } static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg) { tcg_out_opc_addi_w(s, ret, arg, 0); } static void tcg_out_clzctz(TCGContext *s, LoongArchInsn opc, TCGReg a0, TCGReg a1, TCGReg a2, bool c2, bool is_32bit) { if (c2) { /* * Fast path: semantics already satisfied due to constraint and * insn behavior, single instruction is enough. */ tcg_debug_assert(a2 == (is_32bit ? 32 : 64)); /* all clz/ctz insns belong to DJ-format */ tcg_out32(s, encode_dj_insn(opc, a0, a1)); return; } tcg_out32(s, encode_dj_insn(opc, TCG_REG_TMP0, a1)); /* a0 = a1 ? REG_TMP0 : a2 */ tcg_out_opc_maskeqz(s, TCG_REG_TMP0, TCG_REG_TMP0, a1); tcg_out_opc_masknez(s, a0, a2, a1); tcg_out_opc_or(s, a0, TCG_REG_TMP0, a0); } static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, TCGReg arg1, TCGReg arg2, bool c2) { TCGReg tmp; if (c2) { tcg_debug_assert(arg2 == 0); } switch (cond) { case TCG_COND_EQ: if (c2) { tmp = arg1; } else { tcg_out_opc_sub_d(s, ret, arg1, arg2); tmp = ret; } tcg_out_opc_sltui(s, ret, tmp, 1); break; case TCG_COND_NE: if (c2) { tmp = arg1; } else { tcg_out_opc_sub_d(s, ret, arg1, arg2); tmp = ret; } tcg_out_opc_sltu(s, ret, TCG_REG_ZERO, tmp); break; case TCG_COND_LT: tcg_out_opc_slt(s, ret, arg1, arg2); break; case TCG_COND_GE: tcg_out_opc_slt(s, ret, arg1, arg2); tcg_out_opc_xori(s, ret, ret, 1); break; case TCG_COND_LE: tcg_out_setcond(s, TCG_COND_GE, ret, arg2, arg1, false); break; case TCG_COND_GT: tcg_out_setcond(s, TCG_COND_LT, ret, arg2, arg1, false); break; case TCG_COND_LTU: tcg_out_opc_sltu(s, ret, arg1, arg2); break; case TCG_COND_GEU: tcg_out_opc_sltu(s, ret, arg1, arg2); tcg_out_opc_xori(s, ret, ret, 1); break; case TCG_COND_LEU: tcg_out_setcond(s, TCG_COND_GEU, ret, arg2, arg1, false); break; case TCG_COND_GTU: tcg_out_setcond(s, TCG_COND_LTU, ret, arg2, arg1, false); break; default: g_assert_not_reached(); break; } } /* * Branch helpers */ static const struct { LoongArchInsn op; bool swap; } tcg_brcond_to_loongarch[] = { [TCG_COND_EQ] = { OPC_BEQ, false }, [TCG_COND_NE] = { OPC_BNE, false }, [TCG_COND_LT] = { OPC_BGT, true }, [TCG_COND_GE] = { OPC_BLE, true }, [TCG_COND_LE] = { OPC_BLE, false }, [TCG_COND_GT] = { OPC_BGT, false }, [TCG_COND_LTU] = { OPC_BGTU, true }, [TCG_COND_GEU] = { OPC_BLEU, true }, [TCG_COND_LEU] = { OPC_BLEU, false }, [TCG_COND_GTU] = { OPC_BGTU, false } }; static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1, TCGReg arg2, TCGLabel *l) { LoongArchInsn op = tcg_brcond_to_loongarch[cond].op; tcg_debug_assert(op != 0); if (tcg_brcond_to_loongarch[cond].swap) { TCGReg t = arg1; arg1 = arg2; arg2 = t; } /* all conditional branch insns belong to DJSk16-format */ tcg_out_reloc(s, s->code_ptr, R_LOONGARCH_BR_SK16, l, 0); tcg_out32(s, encode_djsk16_insn(op, arg1, arg2, 0)); } static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *arg, bool tail) { TCGReg link = tail ? TCG_REG_ZERO : TCG_REG_RA; ptrdiff_t offset = tcg_pcrel_diff(s, arg); tcg_debug_assert((offset & 3) == 0); if (offset == sextreg(offset, 0, 28)) { /* short jump: +/- 256MiB */ if (tail) { tcg_out_opc_b(s, offset >> 2); } else { tcg_out_opc_bl(s, offset >> 2); } } else if (offset == sextreg(offset, 0, 38)) { /* long jump: +/- 256GiB */ tcg_target_long lo = sextreg(offset, 0, 18); tcg_target_long hi = offset - lo; tcg_out_opc_pcaddu18i(s, TCG_REG_TMP0, hi >> 18); tcg_out_opc_jirl(s, link, TCG_REG_TMP0, lo >> 2); } else { /* far jump: 64-bit */ tcg_target_long lo = sextreg((tcg_target_long)arg, 0, 18); tcg_target_long hi = (tcg_target_long)arg - lo; tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP0, hi); tcg_out_opc_jirl(s, link, TCG_REG_TMP0, lo >> 2); } } static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg, const TCGHelperInfo *info) { tcg_out_call_int(s, arg, false); } /* * Load/store helpers */ static void tcg_out_ldst(TCGContext *s, LoongArchInsn opc, TCGReg data, TCGReg addr, intptr_t offset) { intptr_t imm12 = sextreg(offset, 0, 12); if (offset != imm12) { intptr_t diff = offset - (uintptr_t)s->code_ptr; if (addr == TCG_REG_ZERO && diff == (int32_t)diff) { imm12 = sextreg(diff, 0, 12); tcg_out_opc_pcaddu12i(s, TCG_REG_TMP2, (diff - imm12) >> 12); } else { tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP2, offset - imm12); if (addr != TCG_REG_ZERO) { tcg_out_opc_add_d(s, TCG_REG_TMP2, TCG_REG_TMP2, addr); } } addr = TCG_REG_TMP2; } switch (opc) { case OPC_LD_B: case OPC_LD_BU: case OPC_LD_H: case OPC_LD_HU: case OPC_LD_W: case OPC_LD_WU: case OPC_LD_D: case OPC_ST_B: case OPC_ST_H: case OPC_ST_W: case OPC_ST_D: tcg_out32(s, encode_djsk12_insn(opc, data, addr, imm12)); break; default: g_assert_not_reached(); } } static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1, intptr_t arg2) { bool is_32bit = type == TCG_TYPE_I32; tcg_out_ldst(s, is_32bit ? OPC_LD_W : OPC_LD_D, arg, arg1, arg2); } static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1, intptr_t arg2) { bool is_32bit = type == TCG_TYPE_I32; tcg_out_ldst(s, is_32bit ? OPC_ST_W : OPC_ST_D, arg, arg1, arg2); } static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, TCGReg base, intptr_t ofs) { if (val == 0) { tcg_out_st(s, type, TCG_REG_ZERO, base, ofs); return true; } return false; } /* * Load/store helpers for SoftMMU, and qemu_ld/st implementations */ #if defined(CONFIG_SOFTMMU) /* * helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr, * MemOpIdx oi, uintptr_t ra) */ static void * const qemu_ld_helpers[4] = { [MO_8] = helper_ret_ldub_mmu, [MO_16] = helper_le_lduw_mmu, [MO_32] = helper_le_ldul_mmu, [MO_64] = helper_le_ldq_mmu, }; /* * helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr, * uintxx_t val, MemOpIdx oi, * uintptr_t ra) */ static void * const qemu_st_helpers[4] = { [MO_8] = helper_ret_stb_mmu, [MO_16] = helper_le_stw_mmu, [MO_32] = helper_le_stl_mmu, [MO_64] = helper_le_stq_mmu, }; /* We expect to use a 12-bit negative offset from ENV. */ QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0); QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -(1 << 11)); static bool tcg_out_goto(TCGContext *s, const tcg_insn_unit *target) { tcg_out_opc_b(s, 0); return reloc_br_sd10k16(s->code_ptr - 1, target); } /* * Emits common code for TLB addend lookup, that eventually loads the * addend in TCG_REG_TMP2. */ static void tcg_out_tlb_load(TCGContext *s, TCGReg addrl, MemOpIdx oi, tcg_insn_unit **label_ptr, bool is_load) { MemOp opc = get_memop(oi); unsigned s_bits = opc & MO_SIZE; unsigned a_bits = get_alignment_bits(opc); tcg_target_long compare_mask; int mem_index = get_mmuidx(oi); int fast_ofs = TLB_MASK_TABLE_OFS(mem_index); int mask_ofs = fast_ofs + offsetof(CPUTLBDescFast, mask); int table_ofs = fast_ofs + offsetof(CPUTLBDescFast, table); tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_AREG0, mask_ofs); tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, TCG_AREG0, table_ofs); tcg_out_opc_srli_d(s, TCG_REG_TMP2, addrl, TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); tcg_out_opc_and(s, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP0); tcg_out_opc_add_d(s, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP1); /* Load the tlb comparator and the addend. */ tcg_out_ld(s, TCG_TYPE_TL, TCG_REG_TMP0, TCG_REG_TMP2, is_load ? offsetof(CPUTLBEntry, addr_read) : offsetof(CPUTLBEntry, addr_write)); tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP2, TCG_REG_TMP2, offsetof(CPUTLBEntry, addend)); /* We don't support unaligned accesses. */ if (a_bits < s_bits) { a_bits = s_bits; } /* Clear the non-page, non-alignment bits from the address. */ compare_mask = (tcg_target_long)TARGET_PAGE_MASK | ((1 << a_bits) - 1); tcg_out_movi(s, TCG_TYPE_TL, TCG_REG_TMP1, compare_mask); tcg_out_opc_and(s, TCG_REG_TMP1, TCG_REG_TMP1, addrl); /* Compare masked address with the TLB entry. */ label_ptr[0] = s->code_ptr; tcg_out_opc_bne(s, TCG_REG_TMP0, TCG_REG_TMP1, 0); /* TLB Hit - addend in TCG_REG_TMP2, ready for use. */ } static void add_qemu_ldst_label(TCGContext *s, int is_ld, MemOpIdx oi, TCGType type, TCGReg datalo, TCGReg addrlo, void *raddr, tcg_insn_unit **label_ptr) { TCGLabelQemuLdst *label = new_ldst_label(s); label->is_ld = is_ld; label->oi = oi; label->type = type; label->datalo_reg = datalo; label->datahi_reg = 0; /* unused */ label->addrlo_reg = addrlo; label->addrhi_reg = 0; /* unused */ label->raddr = tcg_splitwx_to_rx(raddr); label->label_ptr[0] = label_ptr[0]; } static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) { MemOpIdx oi = l->oi; MemOp opc = get_memop(oi); MemOp size = opc & MO_SIZE; TCGType type = l->type; /* resolve label address */ if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } /* call load helper */ tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0); tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A1, l->addrlo_reg); tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A2, oi); tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A3, (tcg_target_long)l->raddr); tcg_out_call_int(s, qemu_ld_helpers[size], false); switch (opc & MO_SSIZE) { case MO_SB: tcg_out_ext8s(s, l->datalo_reg, TCG_REG_A0); break; case MO_SW: tcg_out_ext16s(s, l->datalo_reg, TCG_REG_A0); break; case MO_SL: tcg_out_ext32s(s, l->datalo_reg, TCG_REG_A0); break; case MO_UL: if (type == TCG_TYPE_I32) { /* MO_UL loads of i32 should be sign-extended too */ tcg_out_ext32s(s, l->datalo_reg, TCG_REG_A0); break; } /* fallthrough */ default: tcg_out_mov(s, type, l->datalo_reg, TCG_REG_A0); break; } return tcg_out_goto(s, l->raddr); } static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) { MemOpIdx oi = l->oi; MemOp opc = get_memop(oi); MemOp size = opc & MO_SIZE; /* resolve label address */ if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } /* call store helper */ tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0); tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A1, l->addrlo_reg); switch (size) { case MO_8: tcg_out_ext8u(s, TCG_REG_A2, l->datalo_reg); break; case MO_16: tcg_out_ext16u(s, TCG_REG_A2, l->datalo_reg); break; case MO_32: tcg_out_ext32u(s, TCG_REG_A2, l->datalo_reg); break; case MO_64: tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_A2, l->datalo_reg); break; default: g_assert_not_reached(); break; } tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A3, oi); tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A4, (tcg_target_long)l->raddr); tcg_out_call_int(s, qemu_st_helpers[size], false); return tcg_out_goto(s, l->raddr); } #else /* * Alignment helpers for user-mode emulation */ static void tcg_out_test_alignment(TCGContext *s, bool is_ld, TCGReg addr_reg, unsigned a_bits) { TCGLabelQemuLdst *l = new_ldst_label(s); l->is_ld = is_ld; l->addrlo_reg = addr_reg; /* * Without micro-architecture details, we don't know which of bstrpick or * andi is faster, so use bstrpick as it's not constrained by imm field * width. (Not to say alignments >= 2^12 are going to happen any time * soon, though) */ tcg_out_opc_bstrpick_d(s, TCG_REG_TMP1, addr_reg, 0, a_bits - 1); l->label_ptr[0] = s->code_ptr; tcg_out_opc_bne(s, TCG_REG_TMP1, TCG_REG_ZERO, 0); l->raddr = tcg_splitwx_to_rx(s->code_ptr); } static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l) { /* resolve label address */ if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { return false; } tcg_out_mov(s, TCG_TYPE_TL, TCG_REG_A1, l->addrlo_reg); tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0); /* tail call, with the return address back inline. */ tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RA, (uintptr_t)l->raddr); tcg_out_call_int(s, (const void *)(l->is_ld ? helper_unaligned_ld : helper_unaligned_st), true); 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 /* CONFIG_SOFTMMU */ /* * `ext32u` the address register into the temp register given, * if target is 32-bit, no-op otherwise. * * Returns the address register ready for use with TLB addend. */ static TCGReg tcg_out_zext_addr_if_32_bit(TCGContext *s, TCGReg addr, TCGReg tmp) { if (TARGET_LONG_BITS == 32) { tcg_out_ext32u(s, tmp, addr); return tmp; } return addr; } static void tcg_out_qemu_ld_indexed(TCGContext *s, TCGReg rd, TCGReg rj, TCGReg rk, MemOp opc, TCGType type) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) == 0); switch (opc & MO_SSIZE) { case MO_UB: tcg_out_opc_ldx_bu(s, rd, rj, rk); break; case MO_SB: tcg_out_opc_ldx_b(s, rd, rj, rk); break; case MO_UW: tcg_out_opc_ldx_hu(s, rd, rj, rk); break; case MO_SW: tcg_out_opc_ldx_h(s, rd, rj, rk); break; case MO_UL: if (type == TCG_TYPE_I64) { tcg_out_opc_ldx_wu(s, rd, rj, rk); break; } /* fallthrough */ case MO_SL: tcg_out_opc_ldx_w(s, rd, rj, rk); break; case MO_UQ: tcg_out_opc_ldx_d(s, rd, rj, rk); break; default: g_assert_not_reached(); } } static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, TCGType type) { TCGReg addr_regl; TCGReg data_regl; MemOpIdx oi; MemOp opc; #if defined(CONFIG_SOFTMMU) tcg_insn_unit *label_ptr[1]; #else unsigned a_bits; #endif TCGReg base; data_regl = *args++; addr_regl = *args++; oi = *args++; opc = get_memop(oi); #if defined(CONFIG_SOFTMMU) tcg_out_tlb_load(s, addr_regl, oi, label_ptr, 1); base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); tcg_out_qemu_ld_indexed(s, data_regl, base, TCG_REG_TMP2, opc, type); add_qemu_ldst_label(s, 1, oi, type, data_regl, addr_regl, s->code_ptr, label_ptr); #else a_bits = get_alignment_bits(opc); if (a_bits) { tcg_out_test_alignment(s, true, addr_regl, a_bits); } base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); TCGReg guest_base_reg = USE_GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_ZERO; tcg_out_qemu_ld_indexed(s, data_regl, base, guest_base_reg, opc, type); #endif } static void tcg_out_qemu_st_indexed(TCGContext *s, TCGReg data, TCGReg rj, TCGReg rk, MemOp opc) { /* Byte swapping is left to middle-end expansion. */ tcg_debug_assert((opc & MO_BSWAP) == 0); switch (opc & MO_SIZE) { case MO_8: tcg_out_opc_stx_b(s, data, rj, rk); break; case MO_16: tcg_out_opc_stx_h(s, data, rj, rk); break; case MO_32: tcg_out_opc_stx_w(s, data, rj, rk); break; case MO_64: tcg_out_opc_stx_d(s, data, rj, rk); break; default: g_assert_not_reached(); } } static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args) { TCGReg addr_regl; TCGReg data_regl; MemOpIdx oi; MemOp opc; #if defined(CONFIG_SOFTMMU) tcg_insn_unit *label_ptr[1]; #else unsigned a_bits; #endif TCGReg base; data_regl = *args++; addr_regl = *args++; oi = *args++; opc = get_memop(oi); #if defined(CONFIG_SOFTMMU) tcg_out_tlb_load(s, addr_regl, oi, label_ptr, 0); base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); tcg_out_qemu_st_indexed(s, data_regl, base, TCG_REG_TMP2, opc); add_qemu_ldst_label(s, 0, oi, 0, /* type param is unused for stores */ data_regl, addr_regl, s->code_ptr, label_ptr); #else a_bits = get_alignment_bits(opc); if (a_bits) { tcg_out_test_alignment(s, false, addr_regl, a_bits); } base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); TCGReg guest_base_reg = USE_GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_ZERO; tcg_out_qemu_st_indexed(s, data_regl, base, guest_base_reg, opc); #endif } /* LoongArch uses `andi zero, zero, 0` as NOP. */ #define NOP OPC_ANDI static void tcg_out_nop(TCGContext *s) { tcg_out32(s, NOP); } void tb_target_set_jmp_target(const TranslationBlock *tb, int n, uintptr_t jmp_rx, uintptr_t jmp_rw) { tcg_insn_unit i1, i2; ptrdiff_t upper, lower; uintptr_t addr = tb->jmp_target_addr[n]; ptrdiff_t offset = (ptrdiff_t)(addr - jmp_rx) >> 2; if (offset == sextreg(offset, 0, 26)) { i1 = encode_sd10k16_insn(OPC_B, offset); i2 = NOP; } else { tcg_debug_assert(offset == sextreg(offset, 0, 36)); lower = (int16_t)offset; upper = (offset - lower) >> 16; i1 = encode_dsj20_insn(OPC_PCADDU18I, TCG_REG_TMP0, upper); i2 = encode_djsk16_insn(OPC_JIRL, TCG_REG_ZERO, TCG_REG_TMP0, lower); } uint64_t pair = ((uint64_t)i2 << 32) | i1; qatomic_set((uint64_t *)jmp_rw, pair); flush_idcache_range(jmp_rx, jmp_rw, 8); } /* * Entry-points */ static const tcg_insn_unit *tb_ret_addr; static void tcg_out_exit_tb(TCGContext *s, uintptr_t a0) { /* Reuse the zeroing that exists for goto_ptr. */ if (a0 == 0) { tcg_out_call_int(s, tcg_code_gen_epilogue, true); } else { tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A0, a0); tcg_out_call_int(s, tb_ret_addr, true); } } static void tcg_out_goto_tb(TCGContext *s, int which) { /* * Ensure that patch area is 8-byte aligned so that an * atomic write can be used to patch the target address. */ if ((uintptr_t)s->code_ptr & 7) { tcg_out_nop(s); } set_jmp_insn_offset(s, which); /* * actual branch destination will be patched by * tb_target_set_jmp_target later */ tcg_out_opc_pcaddu18i(s, TCG_REG_TMP0, 0); tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_TMP0, 0); set_jmp_reset_offset(s, which); } 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 = args[0]; TCGArg a1 = args[1]; TCGArg a2 = args[2]; int c2 = const_args[2]; switch (opc) { case INDEX_op_mb: tcg_out_mb(s, a0); break; case INDEX_op_goto_ptr: tcg_out_opc_jirl(s, TCG_REG_ZERO, a0, 0); break; case INDEX_op_br: tcg_out_reloc(s, s->code_ptr, R_LOONGARCH_BR_SD10K16, arg_label(a0), 0); tcg_out_opc_b(s, 0); break; case INDEX_op_brcond_i32: case INDEX_op_brcond_i64: tcg_out_brcond(s, a2, a0, a1, arg_label(args[3])); break; case INDEX_op_ext8s_i32: case INDEX_op_ext8s_i64: tcg_out_ext8s(s, a0, a1); break; case INDEX_op_ext8u_i32: case INDEX_op_ext8u_i64: tcg_out_ext8u(s, a0, a1); break; case INDEX_op_ext16s_i32: case INDEX_op_ext16s_i64: tcg_out_ext16s(s, a0, a1); break; case INDEX_op_ext16u_i32: case INDEX_op_ext16u_i64: tcg_out_ext16u(s, a0, a1); break; case INDEX_op_ext32u_i64: case INDEX_op_extu_i32_i64: tcg_out_ext32u(s, a0, a1); break; case INDEX_op_ext32s_i64: case INDEX_op_extrl_i64_i32: case INDEX_op_ext_i32_i64: tcg_out_ext32s(s, a0, a1); break; case INDEX_op_extrh_i64_i32: tcg_out_opc_srai_d(s, a0, a1, 32); break; case INDEX_op_not_i32: case INDEX_op_not_i64: tcg_out_opc_nor(s, a0, a1, TCG_REG_ZERO); break; case INDEX_op_nor_i32: case INDEX_op_nor_i64: if (c2) { tcg_out_opc_ori(s, a0, a1, a2); tcg_out_opc_nor(s, a0, a0, TCG_REG_ZERO); } else { tcg_out_opc_nor(s, a0, a1, a2); } break; case INDEX_op_andc_i32: case INDEX_op_andc_i64: if (c2) { /* guaranteed to fit due to constraint */ tcg_out_opc_andi(s, a0, a1, ~a2); } else { tcg_out_opc_andn(s, a0, a1, a2); } break; case INDEX_op_orc_i32: case INDEX_op_orc_i64: if (c2) { /* guaranteed to fit due to constraint */ tcg_out_opc_ori(s, a0, a1, ~a2); } else { tcg_out_opc_orn(s, a0, a1, a2); } break; case INDEX_op_and_i32: case INDEX_op_and_i64: if (c2) { tcg_out_opc_andi(s, a0, a1, a2); } else { tcg_out_opc_and(s, a0, a1, a2); } break; case INDEX_op_or_i32: case INDEX_op_or_i64: if (c2) { tcg_out_opc_ori(s, a0, a1, a2); } else { tcg_out_opc_or(s, a0, a1, a2); } break; case INDEX_op_xor_i32: case INDEX_op_xor_i64: if (c2) { tcg_out_opc_xori(s, a0, a1, a2); } else { tcg_out_opc_xor(s, a0, a1, a2); } break; case INDEX_op_extract_i32: tcg_out_opc_bstrpick_w(s, a0, a1, a2, a2 + args[3] - 1); break; case INDEX_op_extract_i64: tcg_out_opc_bstrpick_d(s, a0, a1, a2, a2 + args[3] - 1); break; case INDEX_op_deposit_i32: tcg_out_opc_bstrins_w(s, a0, a2, args[3], args[3] + args[4] - 1); break; case INDEX_op_deposit_i64: tcg_out_opc_bstrins_d(s, a0, a2, args[3], args[3] + args[4] - 1); break; case INDEX_op_bswap16_i32: case INDEX_op_bswap16_i64: tcg_out_opc_revb_2h(s, a0, a1); if (a2 & TCG_BSWAP_OS) { tcg_out_ext16s(s, a0, a0); } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { tcg_out_ext16u(s, a0, a0); } break; case INDEX_op_bswap32_i32: /* All 32-bit values are computed sign-extended in the register. */ a2 = TCG_BSWAP_OS; /* fallthrough */ case INDEX_op_bswap32_i64: tcg_out_opc_revb_2w(s, a0, a1); if (a2 & TCG_BSWAP_OS) { tcg_out_ext32s(s, a0, a0); } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { tcg_out_ext32u(s, a0, a0); } break; case INDEX_op_bswap64_i64: tcg_out_opc_revb_d(s, a0, a1); break; case INDEX_op_clz_i32: tcg_out_clzctz(s, OPC_CLZ_W, a0, a1, a2, c2, true); break; case INDEX_op_clz_i64: tcg_out_clzctz(s, OPC_CLZ_D, a0, a1, a2, c2, false); break; case INDEX_op_ctz_i32: tcg_out_clzctz(s, OPC_CTZ_W, a0, a1, a2, c2, true); break; case INDEX_op_ctz_i64: tcg_out_clzctz(s, OPC_CTZ_D, a0, a1, a2, c2, false); break; case INDEX_op_shl_i32: if (c2) { tcg_out_opc_slli_w(s, a0, a1, a2 & 0x1f); } else { tcg_out_opc_sll_w(s, a0, a1, a2); } break; case INDEX_op_shl_i64: if (c2) { tcg_out_opc_slli_d(s, a0, a1, a2 & 0x3f); } else { tcg_out_opc_sll_d(s, a0, a1, a2); } break; case INDEX_op_shr_i32: if (c2) { tcg_out_opc_srli_w(s, a0, a1, a2 & 0x1f); } else { tcg_out_opc_srl_w(s, a0, a1, a2); } break; case INDEX_op_shr_i64: if (c2) { tcg_out_opc_srli_d(s, a0, a1, a2 & 0x3f); } else { tcg_out_opc_srl_d(s, a0, a1, a2); } break; case INDEX_op_sar_i32: if (c2) { tcg_out_opc_srai_w(s, a0, a1, a2 & 0x1f); } else { tcg_out_opc_sra_w(s, a0, a1, a2); } break; case INDEX_op_sar_i64: if (c2) { tcg_out_opc_srai_d(s, a0, a1, a2 & 0x3f); } else { tcg_out_opc_sra_d(s, a0, a1, a2); } break; case INDEX_op_rotl_i32: /* transform into equivalent rotr/rotri */ if (c2) { tcg_out_opc_rotri_w(s, a0, a1, (32 - a2) & 0x1f); } else { tcg_out_opc_sub_w(s, TCG_REG_TMP0, TCG_REG_ZERO, a2); tcg_out_opc_rotr_w(s, a0, a1, TCG_REG_TMP0); } break; case INDEX_op_rotl_i64: /* transform into equivalent rotr/rotri */ if (c2) { tcg_out_opc_rotri_d(s, a0, a1, (64 - a2) & 0x3f); } else { tcg_out_opc_sub_w(s, TCG_REG_TMP0, TCG_REG_ZERO, a2); tcg_out_opc_rotr_d(s, a0, a1, TCG_REG_TMP0); } break; case INDEX_op_rotr_i32: if (c2) { tcg_out_opc_rotri_w(s, a0, a1, a2 & 0x1f); } else { tcg_out_opc_rotr_w(s, a0, a1, a2); } break; case INDEX_op_rotr_i64: if (c2) { tcg_out_opc_rotri_d(s, a0, a1, a2 & 0x3f); } else { tcg_out_opc_rotr_d(s, a0, a1, a2); } break; case INDEX_op_add_i32: if (c2) { tcg_out_addi(s, TCG_TYPE_I32, a0, a1, a2); } else { tcg_out_opc_add_w(s, a0, a1, a2); } break; case INDEX_op_add_i64: if (c2) { tcg_out_addi(s, TCG_TYPE_I64, a0, a1, a2); } else { tcg_out_opc_add_d(s, a0, a1, a2); } break; case INDEX_op_sub_i32: if (c2) { tcg_out_addi(s, TCG_TYPE_I32, a0, a1, -a2); } else { tcg_out_opc_sub_w(s, a0, a1, a2); } break; case INDEX_op_sub_i64: if (c2) { tcg_out_addi(s, TCG_TYPE_I64, a0, a1, -a2); } else { tcg_out_opc_sub_d(s, a0, a1, a2); } break; case INDEX_op_mul_i32: tcg_out_opc_mul_w(s, a0, a1, a2); break; case INDEX_op_mul_i64: tcg_out_opc_mul_d(s, a0, a1, a2); break; case INDEX_op_mulsh_i32: tcg_out_opc_mulh_w(s, a0, a1, a2); break; case INDEX_op_mulsh_i64: tcg_out_opc_mulh_d(s, a0, a1, a2); break; case INDEX_op_muluh_i32: tcg_out_opc_mulh_wu(s, a0, a1, a2); break; case INDEX_op_muluh_i64: tcg_out_opc_mulh_du(s, a0, a1, a2); break; case INDEX_op_div_i32: tcg_out_opc_div_w(s, a0, a1, a2); break; case INDEX_op_div_i64: tcg_out_opc_div_d(s, a0, a1, a2); break; case INDEX_op_divu_i32: tcg_out_opc_div_wu(s, a0, a1, a2); break; case INDEX_op_divu_i64: tcg_out_opc_div_du(s, a0, a1, a2); break; case INDEX_op_rem_i32: tcg_out_opc_mod_w(s, a0, a1, a2); break; case INDEX_op_rem_i64: tcg_out_opc_mod_d(s, a0, a1, a2); break; case INDEX_op_remu_i32: tcg_out_opc_mod_wu(s, a0, a1, a2); break; case INDEX_op_remu_i64: tcg_out_opc_mod_du(s, a0, a1, a2); break; case INDEX_op_setcond_i32: case INDEX_op_setcond_i64: tcg_out_setcond(s, args[3], a0, a1, a2, c2); break; case INDEX_op_ld8s_i32: case INDEX_op_ld8s_i64: tcg_out_ldst(s, OPC_LD_B, a0, a1, a2); break; case INDEX_op_ld8u_i32: case INDEX_op_ld8u_i64: tcg_out_ldst(s, OPC_LD_BU, a0, a1, a2); break; case INDEX_op_ld16s_i32: case INDEX_op_ld16s_i64: tcg_out_ldst(s, OPC_LD_H, a0, a1, a2); break; case INDEX_op_ld16u_i32: case INDEX_op_ld16u_i64: tcg_out_ldst(s, OPC_LD_HU, a0, a1, a2); break; case INDEX_op_ld_i32: case INDEX_op_ld32s_i64: tcg_out_ldst(s, OPC_LD_W, a0, a1, a2); break; case INDEX_op_ld32u_i64: tcg_out_ldst(s, OPC_LD_WU, a0, a1, a2); break; case INDEX_op_ld_i64: tcg_out_ldst(s, OPC_LD_D, a0, a1, a2); break; case INDEX_op_st8_i32: case INDEX_op_st8_i64: tcg_out_ldst(s, OPC_ST_B, a0, a1, a2); break; case INDEX_op_st16_i32: case INDEX_op_st16_i64: tcg_out_ldst(s, OPC_ST_H, a0, a1, a2); break; case INDEX_op_st_i32: case INDEX_op_st32_i64: tcg_out_ldst(s, OPC_ST_W, a0, a1, a2); break; case INDEX_op_st_i64: tcg_out_ldst(s, OPC_ST_D, a0, a1, a2); break; case INDEX_op_qemu_ld_i32: tcg_out_qemu_ld(s, args, TCG_TYPE_I32); break; case INDEX_op_qemu_ld_i64: tcg_out_qemu_ld(s, args, TCG_TYPE_I64); break; case INDEX_op_qemu_st_i32: tcg_out_qemu_st(s, args); break; case INDEX_op_qemu_st_i64: tcg_out_qemu_st(s, args); break; case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ case INDEX_op_mov_i64: 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. */ 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_st8_i32: case INDEX_op_st8_i64: case INDEX_op_st16_i32: case INDEX_op_st16_i64: case INDEX_op_st32_i64: case INDEX_op_st_i32: case INDEX_op_st_i64: return C_O0_I2(rZ, r); case INDEX_op_brcond_i32: case INDEX_op_brcond_i64: return C_O0_I2(rZ, rZ); case INDEX_op_qemu_st_i32: case INDEX_op_qemu_st_i64: return C_O0_I2(LZ, L); case INDEX_op_ext8s_i32: case INDEX_op_ext8s_i64: case INDEX_op_ext8u_i32: case INDEX_op_ext8u_i64: case INDEX_op_ext16s_i32: case INDEX_op_ext16s_i64: case INDEX_op_ext16u_i32: case INDEX_op_ext16u_i64: case INDEX_op_ext32s_i64: case INDEX_op_ext32u_i64: case INDEX_op_extu_i32_i64: case INDEX_op_extrl_i64_i32: case INDEX_op_extrh_i64_i32: case INDEX_op_ext_i32_i64: case INDEX_op_not_i32: case INDEX_op_not_i64: case INDEX_op_extract_i32: case INDEX_op_extract_i64: case INDEX_op_bswap16_i32: case INDEX_op_bswap16_i64: case INDEX_op_bswap32_i32: case INDEX_op_bswap32_i64: case INDEX_op_bswap64_i64: case INDEX_op_ld8s_i32: case INDEX_op_ld8s_i64: case INDEX_op_ld8u_i32: case INDEX_op_ld8u_i64: case INDEX_op_ld16s_i32: case INDEX_op_ld16s_i64: case INDEX_op_ld16u_i32: case INDEX_op_ld16u_i64: case INDEX_op_ld32s_i64: case INDEX_op_ld32u_i64: case INDEX_op_ld_i32: case INDEX_op_ld_i64: return C_O1_I1(r, r); case INDEX_op_qemu_ld_i32: case INDEX_op_qemu_ld_i64: return C_O1_I1(r, L); case INDEX_op_andc_i32: case INDEX_op_andc_i64: case INDEX_op_orc_i32: case INDEX_op_orc_i64: /* * LoongArch insns for these ops don't have reg-imm forms, but we * can express using andi/ori if ~constant satisfies * TCG_CT_CONST_U12. */ return C_O1_I2(r, r, rC); case INDEX_op_shl_i32: case INDEX_op_shl_i64: case INDEX_op_shr_i32: case INDEX_op_shr_i64: case INDEX_op_sar_i32: case INDEX_op_sar_i64: case INDEX_op_rotl_i32: case INDEX_op_rotl_i64: case INDEX_op_rotr_i32: case INDEX_op_rotr_i64: return C_O1_I2(r, r, ri); case INDEX_op_add_i32: return C_O1_I2(r, r, ri); case INDEX_op_add_i64: return C_O1_I2(r, r, rJ); case INDEX_op_and_i32: case INDEX_op_and_i64: case INDEX_op_nor_i32: case INDEX_op_nor_i64: case INDEX_op_or_i32: case INDEX_op_or_i64: case INDEX_op_xor_i32: case INDEX_op_xor_i64: /* LoongArch reg-imm bitops have their imms ZERO-extended */ return C_O1_I2(r, r, rU); case INDEX_op_clz_i32: case INDEX_op_clz_i64: case INDEX_op_ctz_i32: case INDEX_op_ctz_i64: return C_O1_I2(r, r, rW); case INDEX_op_setcond_i32: case INDEX_op_setcond_i64: return C_O1_I2(r, r, rZ); case INDEX_op_deposit_i32: case INDEX_op_deposit_i64: /* Must deposit into the same register as input */ return C_O1_I2(r, 0, rZ); case INDEX_op_sub_i32: return C_O1_I2(r, rZ, ri); case INDEX_op_sub_i64: return C_O1_I2(r, rZ, rJ); case INDEX_op_mul_i32: case INDEX_op_mul_i64: case INDEX_op_mulsh_i32: case INDEX_op_mulsh_i64: case INDEX_op_muluh_i32: case INDEX_op_muluh_i64: case INDEX_op_div_i32: case INDEX_op_div_i64: case INDEX_op_divu_i32: case INDEX_op_divu_i64: case INDEX_op_rem_i32: case INDEX_op_rem_i64: case INDEX_op_remu_i32: case INDEX_op_remu_i64: return C_O1_I2(r, rZ, rZ); default: g_assert_not_reached(); } } static const int tcg_target_callee_save_regs[] = { TCG_REG_S0, /* used for the global env (TCG_AREG0) */ TCG_REG_S1, TCG_REG_S2, TCG_REG_S3, TCG_REG_S4, TCG_REG_S5, TCG_REG_S6, TCG_REG_S7, TCG_REG_S8, TCG_REG_S9, TCG_REG_RA, /* should be last for ABI compliance */ }; /* Stack frame parameters. */ #define REG_SIZE (TCG_TARGET_REG_BITS / 8) #define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE) #define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long)) #define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \ + TCG_TARGET_STACK_ALIGN - 1) \ & -TCG_TARGET_STACK_ALIGN) #define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE) /* We're expecting to be able to use an immediate for frame allocation. */ QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7ff); /* Generate global QEMU prologue and epilogue code */ static void tcg_target_qemu_prologue(TCGContext *s) { int i; tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE); /* TB prologue */ tcg_out_opc_addi_d(s, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE); for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], TCG_REG_SP, SAVE_OFS + i * REG_SIZE); } #if !defined(CONFIG_SOFTMMU) if (USE_GUEST_BASE) { tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base); tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG); } #endif /* Call generated code */ tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); tcg_out_opc_jirl(s, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0); /* Return path for goto_ptr. Set return value to 0 */ tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr); tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO); /* TB epilogue */ tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr); for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], TCG_REG_SP, SAVE_OFS + i * REG_SIZE); } tcg_out_opc_addi_d(s, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE); tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_RA, 0); } static void tcg_target_init(TCGContext *s) { tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS; tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS; tcg_target_call_clobber_regs = ALL_GENERAL_REGS; tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S0); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S1); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S2); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S3); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S4); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S5); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S6); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S7); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S8); tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S9); s->reserved_regs = 0; tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO); tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP0); tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP1); tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP2); tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP); tcg_regset_set_reg(s->reserved_regs, TCG_REG_RESERVED); } typedef struct { DebugFrameHeader h; uint8_t fde_def_cfa[4]; uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2]; } DebugFrame; #define ELF_HOST_MACHINE EM_LOONGARCH 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 = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */ .h.cie.return_column = TCG_REG_RA, /* Total FDE size does not include the "len" member. */ .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), .fde_def_cfa = { 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */ (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ (FRAME_SIZE >> 7) }, .fde_reg_ofs = { 0x80 + 23, 11, /* DW_CFA_offset, s0, -88 */ 0x80 + 24, 10, /* DW_CFA_offset, s1, -80 */ 0x80 + 25, 9, /* DW_CFA_offset, s2, -72 */ 0x80 + 26, 8, /* DW_CFA_offset, s3, -64 */ 0x80 + 27, 7, /* DW_CFA_offset, s4, -56 */ 0x80 + 28, 6, /* DW_CFA_offset, s5, -48 */ 0x80 + 29, 5, /* DW_CFA_offset, s6, -40 */ 0x80 + 30, 4, /* DW_CFA_offset, s7, -32 */ 0x80 + 31, 3, /* DW_CFA_offset, s8, -24 */ 0x80 + 22, 2, /* DW_CFA_offset, s9, -16 */ 0x80 + 1 , 1, /* DW_CFA_offset, ra, -8 */ } }; void tcg_register_jit(const void *buf, size_t buf_size) { tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); }