diff options
Diffstat (limited to 'tcg/aarch64/tcg-target.c')
| -rw-r--r-- | tcg/aarch64/tcg-target.c | 1404 |
1 files changed, 1404 insertions, 0 deletions
diff --git a/tcg/aarch64/tcg-target.c b/tcg/aarch64/tcg-target.c new file mode 100644 index 0000000000..562a549dab --- /dev/null +++ b/tcg/aarch64/tcg-target.c @@ -0,0 +1,1404 @@ +/* + * Initial TCG Implementation for aarch64 + * + * Copyright (c) 2013 Huawei Technologies Duesseldorf GmbH + * Written by Claudio Fontana + * + * This work is licensed under the terms of the GNU GPL, version 2 or + * (at your option) any later version. + * + * See the COPYING file in the top-level directory for details. + */ + +#include "qemu/bitops.h" + +#ifndef NDEBUG +static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { + "%x0", "%x1", "%x2", "%x3", "%x4", "%x5", "%x6", "%x7", + "%x8", "%x9", "%x10", "%x11", "%x12", "%x13", "%x14", "%x15", + "%x16", "%x17", "%x18", "%x19", "%x20", "%x21", "%x22", "%x23", + "%x24", "%x25", "%x26", "%x27", "%x28", + "%fp", /* frame pointer */ + "%lr", /* link register */ + "%sp", /* stack pointer */ +}; +#endif /* NDEBUG */ + +#ifdef TARGET_WORDS_BIGENDIAN + #define TCG_LDST_BSWAP 1 +#else + #define TCG_LDST_BSWAP 0 +#endif + +static const int tcg_target_reg_alloc_order[] = { + TCG_REG_X20, TCG_REG_X21, TCG_REG_X22, TCG_REG_X23, + TCG_REG_X24, TCG_REG_X25, TCG_REG_X26, TCG_REG_X27, + TCG_REG_X28, /* we will reserve this for GUEST_BASE if configured */ + + TCG_REG_X9, TCG_REG_X10, TCG_REG_X11, TCG_REG_X12, + TCG_REG_X13, TCG_REG_X14, TCG_REG_X15, + TCG_REG_X16, TCG_REG_X17, + + TCG_REG_X18, TCG_REG_X19, /* will not use these, see tcg_target_init */ + + TCG_REG_X0, TCG_REG_X1, TCG_REG_X2, TCG_REG_X3, + TCG_REG_X4, TCG_REG_X5, TCG_REG_X6, TCG_REG_X7, + + TCG_REG_X8, /* will not use, see tcg_target_init */ +}; + +static const int tcg_target_call_iarg_regs[8] = { + TCG_REG_X0, TCG_REG_X1, TCG_REG_X2, TCG_REG_X3, + TCG_REG_X4, TCG_REG_X5, TCG_REG_X6, TCG_REG_X7 +}; +static const int tcg_target_call_oarg_regs[1] = { + TCG_REG_X0 +}; + +#define TCG_REG_TMP TCG_REG_X8 + +#ifndef CONFIG_SOFTMMU +# if defined(CONFIG_USE_GUEST_BASE) +# define TCG_REG_GUEST_BASE TCG_REG_X28 +# else +# define TCG_REG_GUEST_BASE TCG_REG_XZR +# endif +#endif + +static inline void reloc_pc26(void *code_ptr, tcg_target_long target) +{ + tcg_target_long offset; uint32_t insn; + offset = (target - (tcg_target_long)code_ptr) / 4; + /* read instruction, mask away previous PC_REL26 parameter contents, + set the proper offset, then write back the instruction. */ + insn = *(uint32_t *)code_ptr; + insn = deposit32(insn, 0, 26, offset); + *(uint32_t *)code_ptr = insn; +} + +static inline void reloc_pc19(void *code_ptr, tcg_target_long target) +{ + tcg_target_long offset; uint32_t insn; + offset = (target - (tcg_target_long)code_ptr) / 4; + /* read instruction, mask away previous PC_REL19 parameter contents, + set the proper offset, then write back the instruction. */ + insn = *(uint32_t *)code_ptr; + insn = deposit32(insn, 5, 19, offset); + *(uint32_t *)code_ptr = insn; +} + +static inline void patch_reloc(uint8_t *code_ptr, int type, + tcg_target_long value, tcg_target_long addend) +{ + value += addend; + + switch (type) { + case R_AARCH64_JUMP26: + case R_AARCH64_CALL26: + reloc_pc26(code_ptr, value); + break; + case R_AARCH64_CONDBR19: + reloc_pc19(code_ptr, value); + break; + + default: + tcg_abort(); + } +} + +/* parse target specific constraints */ +static int target_parse_constraint(TCGArgConstraint *ct, + const char **pct_str) +{ + const char *ct_str = *pct_str; + + switch (ct_str[0]) { + case 'r': + ct->ct |= TCG_CT_REG; + tcg_regset_set32(ct->u.regs, 0, (1ULL << TCG_TARGET_NB_REGS) - 1); + break; + case 'l': /* qemu_ld / qemu_st address, data_reg */ + ct->ct |= TCG_CT_REG; + tcg_regset_set32(ct->u.regs, 0, (1ULL << TCG_TARGET_NB_REGS) - 1); +#ifdef CONFIG_SOFTMMU + /* x0 and x1 will be overwritten when reading the tlb entry, + and x2, and x3 for helper args, better to avoid using them. */ + tcg_regset_reset_reg(ct->u.regs, TCG_REG_X0); + tcg_regset_reset_reg(ct->u.regs, TCG_REG_X1); + tcg_regset_reset_reg(ct->u.regs, TCG_REG_X2); + tcg_regset_reset_reg(ct->u.regs, TCG_REG_X3); +#endif + break; + default: + return -1; + } + + ct_str++; + *pct_str = ct_str; + return 0; +} + +static inline int tcg_target_const_match(tcg_target_long val, + const TCGArgConstraint *arg_ct) +{ + int ct = arg_ct->ct; + + if (ct & TCG_CT_CONST) { + return 1; + } + + return 0; +} + +enum aarch64_cond_code { + COND_EQ = 0x0, + COND_NE = 0x1, + COND_CS = 0x2, /* Unsigned greater or equal */ + COND_HS = COND_CS, /* ALIAS greater or equal */ + COND_CC = 0x3, /* Unsigned less than */ + COND_LO = COND_CC, /* ALIAS Lower */ + 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, + COND_NV = 0xf, /* behaves like COND_AL here */ +}; + +static const enum aarch64_cond_code tcg_cond_to_aarch64[] = { + [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_LO, + [TCG_COND_GTU] = COND_HI, + [TCG_COND_GEU] = COND_HS, + [TCG_COND_LEU] = COND_LS, +}; + +/* opcodes for LDR / STR instructions with base + simm9 addressing */ +enum aarch64_ldst_op_data { /* size of the data moved */ + LDST_8 = 0x38, + LDST_16 = 0x78, + LDST_32 = 0xb8, + LDST_64 = 0xf8, +}; +enum aarch64_ldst_op_type { /* type of operation */ + LDST_ST = 0x0, /* store */ + LDST_LD = 0x4, /* load */ + LDST_LD_S_X = 0x8, /* load and sign-extend into Xt */ + LDST_LD_S_W = 0xc, /* load and sign-extend into Wt */ +}; + +enum aarch64_arith_opc { + ARITH_AND = 0x0a, + ARITH_ADD = 0x0b, + ARITH_OR = 0x2a, + ARITH_ADDS = 0x2b, + ARITH_XOR = 0x4a, + ARITH_SUB = 0x4b, + ARITH_ANDS = 0x6a, + ARITH_SUBS = 0x6b, +}; + +enum aarch64_srr_opc { + SRR_SHL = 0x0, + SRR_SHR = 0x4, + SRR_SAR = 0x8, + SRR_ROR = 0xc +}; + +static inline enum aarch64_ldst_op_data +aarch64_ldst_get_data(TCGOpcode tcg_op) +{ + switch (tcg_op) { + case INDEX_op_ld8u_i32: + case INDEX_op_ld8s_i32: + case INDEX_op_ld8u_i64: + case INDEX_op_ld8s_i64: + case INDEX_op_st8_i32: + case INDEX_op_st8_i64: + return LDST_8; + + case INDEX_op_ld16u_i32: + case INDEX_op_ld16s_i32: + case INDEX_op_ld16u_i64: + case INDEX_op_ld16s_i64: + case INDEX_op_st16_i32: + case INDEX_op_st16_i64: + return LDST_16; + + case INDEX_op_ld_i32: + case INDEX_op_st_i32: + case INDEX_op_ld32u_i64: + case INDEX_op_ld32s_i64: + case INDEX_op_st32_i64: + return LDST_32; + + case INDEX_op_ld_i64: + case INDEX_op_st_i64: + return LDST_64; + + default: + tcg_abort(); + } +} + +static inline enum aarch64_ldst_op_type +aarch64_ldst_get_type(TCGOpcode tcg_op) +{ + switch (tcg_op) { + case INDEX_op_st8_i32: + case INDEX_op_st16_i32: + case INDEX_op_st8_i64: + case INDEX_op_st16_i64: + case INDEX_op_st_i32: + case INDEX_op_st32_i64: + case INDEX_op_st_i64: + return LDST_ST; + + case INDEX_op_ld8u_i32: + case INDEX_op_ld16u_i32: + case INDEX_op_ld8u_i64: + case INDEX_op_ld16u_i64: + case INDEX_op_ld_i32: + case INDEX_op_ld32u_i64: + case INDEX_op_ld_i64: + return LDST_LD; + + case INDEX_op_ld8s_i32: + case INDEX_op_ld16s_i32: + return LDST_LD_S_W; + + case INDEX_op_ld8s_i64: + case INDEX_op_ld16s_i64: + case INDEX_op_ld32s_i64: + return LDST_LD_S_X; + + default: + tcg_abort(); + } +} + +static inline uint32_t tcg_in32(TCGContext *s) +{ + uint32_t v = *(uint32_t *)s->code_ptr; + return v; +} + +static inline void tcg_out_ldst_9(TCGContext *s, + enum aarch64_ldst_op_data op_data, + enum aarch64_ldst_op_type op_type, + TCGReg rd, TCGReg rn, tcg_target_long offset) +{ + /* use LDUR with BASE register with 9bit signed unscaled offset */ + unsigned int mod, off; + + if (offset < 0) { + off = (256 + offset); + mod = 0x1; + } else { + off = offset; + mod = 0x0; + } + + mod |= op_type; + tcg_out32(s, op_data << 24 | mod << 20 | off << 12 | rn << 5 | rd); +} + +static inline void tcg_out_movr(TCGContext *s, int ext, TCGReg rd, TCGReg src) +{ + /* register to register move using MOV (shifted register with no shift) */ + /* using MOV 0x2a0003e0 | (shift).. */ + unsigned int base = ext ? 0xaa0003e0 : 0x2a0003e0; + tcg_out32(s, base | src << 16 | rd); +} + +static inline void tcg_out_movi_aux(TCGContext *s, + TCGReg rd, uint64_t value) +{ + uint32_t half, base, shift, movk = 0; + /* construct halfwords of the immediate with MOVZ/MOVK with LSL */ + /* using MOVZ 0x52800000 | extended reg.. */ + base = (value > 0xffffffff) ? 0xd2800000 : 0x52800000; + /* count trailing zeros in 16 bit steps, mapping 64 to 0. Emit the + first MOVZ with the half-word immediate skipping the zeros, with a shift + (LSL) equal to this number. Then morph all next instructions into MOVKs. + Zero the processed half-word in the value, continue until empty. + We build the final result 16bits at a time with up to 4 instructions, + but do not emit instructions for 16bit zero holes. */ + do { + shift = ctz64(value) & (63 & -16); + half = (value >> shift) & 0xffff; + tcg_out32(s, base | movk | shift << 17 | half << 5 | rd); + movk = 0x20000000; /* morph next MOVZs into MOVKs */ + value &= ~(0xffffUL << shift); + } while (value); +} + +static inline void tcg_out_movi(TCGContext *s, TCGType type, + TCGReg rd, tcg_target_long value) +{ + if (type == TCG_TYPE_I64) { + tcg_out_movi_aux(s, rd, value); + } else { + tcg_out_movi_aux(s, rd, value & 0xffffffff); + } +} + +static inline void tcg_out_ldst_r(TCGContext *s, + enum aarch64_ldst_op_data op_data, + enum aarch64_ldst_op_type op_type, + TCGReg rd, TCGReg base, TCGReg regoff) +{ + /* load from memory to register using base + 64bit register offset */ + /* using f.e. STR Wt, [Xn, Xm] 0xb8600800|(regoff << 16)|(base << 5)|rd */ + /* the 0x6000 is for the "no extend field" */ + tcg_out32(s, 0x00206800 + | op_data << 24 | op_type << 20 | regoff << 16 | base << 5 | rd); +} + +/* solve the whole ldst problem */ +static inline void tcg_out_ldst(TCGContext *s, enum aarch64_ldst_op_data data, + enum aarch64_ldst_op_type type, + TCGReg rd, TCGReg rn, tcg_target_long offset) +{ + if (offset >= -256 && offset < 256) { + tcg_out_ldst_9(s, data, type, rd, rn, offset); + } else { + tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP, offset); + tcg_out_ldst_r(s, data, type, rd, rn, TCG_REG_TMP); + } +} + +/* mov alias implemented with add immediate, useful to move to/from SP */ +static inline void tcg_out_movr_sp(TCGContext *s, int ext, TCGReg rd, TCGReg rn) +{ + /* using ADD 0x11000000 | (ext) | rn << 5 | rd */ + unsigned int base = ext ? 0x91000000 : 0x11000000; + tcg_out32(s, base | rn << 5 | rd); +} + +static inline void tcg_out_mov(TCGContext *s, + TCGType type, TCGReg ret, TCGReg arg) +{ + if (ret != arg) { + tcg_out_movr(s, type == TCG_TYPE_I64, ret, arg); + } +} + +static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, + TCGReg arg1, tcg_target_long arg2) +{ + tcg_out_ldst(s, (type == TCG_TYPE_I64) ? LDST_64 : LDST_32, LDST_LD, + arg, arg1, arg2); +} + +static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, + TCGReg arg1, tcg_target_long arg2) +{ + tcg_out_ldst(s, (type == TCG_TYPE_I64) ? LDST_64 : LDST_32, LDST_ST, + arg, arg1, arg2); +} + +static inline void tcg_out_arith(TCGContext *s, enum aarch64_arith_opc opc, + int ext, TCGReg rd, TCGReg rn, TCGReg rm, + int shift_imm) +{ + /* Using shifted register arithmetic operations */ + /* if extended register operation (64bit) just OR with 0x80 << 24 */ + unsigned int shift, base = ext ? (0x80 | opc) << 24 : opc << 24; + if (shift_imm == 0) { + shift = 0; + } else if (shift_imm > 0) { + shift = shift_imm << 10 | 1 << 22; + } else /* (shift_imm < 0) */ { + shift = (-shift_imm) << 10; + } + tcg_out32(s, base | rm << 16 | shift | rn << 5 | rd); +} + +static inline void tcg_out_mul(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, TCGReg rm) +{ + /* Using MADD 0x1b000000 with Ra = wzr alias MUL 0x1b007c00 */ + unsigned int base = ext ? 0x9b007c00 : 0x1b007c00; + tcg_out32(s, base | rm << 16 | rn << 5 | rd); +} + +static inline void tcg_out_shiftrot_reg(TCGContext *s, + enum aarch64_srr_opc opc, int ext, + TCGReg rd, TCGReg rn, TCGReg rm) +{ + /* using 2-source data processing instructions 0x1ac02000 */ + unsigned int base = ext ? 0x9ac02000 : 0x1ac02000; + tcg_out32(s, base | rm << 16 | opc << 8 | rn << 5 | rd); +} + +static inline void tcg_out_ubfm(TCGContext *s, int ext, TCGReg rd, TCGReg rn, + unsigned int a, unsigned int b) +{ + /* Using UBFM 0x53000000 Wd, Wn, a, b */ + unsigned int base = ext ? 0xd3400000 : 0x53000000; + tcg_out32(s, base | a << 16 | b << 10 | rn << 5 | rd); +} + +static inline void tcg_out_sbfm(TCGContext *s, int ext, TCGReg rd, TCGReg rn, + unsigned int a, unsigned int b) +{ + /* Using SBFM 0x13000000 Wd, Wn, a, b */ + unsigned int base = ext ? 0x93400000 : 0x13000000; + tcg_out32(s, base | a << 16 | b << 10 | rn << 5 | rd); +} + +static inline void tcg_out_extr(TCGContext *s, int ext, TCGReg rd, + TCGReg rn, TCGReg rm, unsigned int a) +{ + /* Using EXTR 0x13800000 Wd, Wn, Wm, a */ + unsigned int base = ext ? 0x93c00000 : 0x13800000; + tcg_out32(s, base | rm << 16 | a << 10 | rn << 5 | rd); +} + +static inline void tcg_out_shl(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, unsigned int m) +{ + int bits, max; + bits = ext ? 64 : 32; + max = bits - 1; + tcg_out_ubfm(s, ext, rd, rn, bits - (m & max), max - (m & max)); +} + +static inline void tcg_out_shr(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, unsigned int m) +{ + int max = ext ? 63 : 31; + tcg_out_ubfm(s, ext, rd, rn, m & max, max); +} + +static inline void tcg_out_sar(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, unsigned int m) +{ + int max = ext ? 63 : 31; + tcg_out_sbfm(s, ext, rd, rn, m & max, max); +} + +static inline void tcg_out_rotr(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, unsigned int m) +{ + int max = ext ? 63 : 31; + tcg_out_extr(s, ext, rd, rn, rn, m & max); +} + +static inline void tcg_out_rotl(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, unsigned int m) +{ + int bits, max; + bits = ext ? 64 : 32; + max = bits - 1; + tcg_out_extr(s, ext, rd, rn, rn, bits - (m & max)); +} + +static inline void tcg_out_cmp(TCGContext *s, int ext, TCGReg rn, TCGReg rm, + int shift_imm) +{ + /* Using CMP alias SUBS wzr, Wn, Wm */ + tcg_out_arith(s, ARITH_SUBS, ext, TCG_REG_XZR, rn, rm, shift_imm); +} + +static inline void tcg_out_cset(TCGContext *s, int ext, TCGReg rd, TCGCond c) +{ + /* Using CSET alias of CSINC 0x1a800400 Xd, XZR, XZR, invert(cond) */ + unsigned int base = ext ? 0x9a9f07e0 : 0x1a9f07e0; + tcg_out32(s, base | tcg_cond_to_aarch64[tcg_invert_cond(c)] << 12 | rd); +} + +static inline void tcg_out_goto(TCGContext *s, tcg_target_long target) +{ + tcg_target_long offset; + offset = (target - (tcg_target_long)s->code_ptr) / 4; + + if (offset < -0x02000000 || offset >= 0x02000000) { + /* out of 26bit range */ + tcg_abort(); + } + + tcg_out32(s, 0x14000000 | (offset & 0x03ffffff)); +} + +static inline void tcg_out_goto_noaddr(TCGContext *s) +{ + /* We pay attention here to not modify the branch target by + reading from the buffer. This ensure that caches and memory are + kept coherent during retranslation. + Mask away possible garbage in the high bits for the first translation, + while keeping the offset bits for retranslation. */ + uint32_t insn; + insn = (tcg_in32(s) & 0x03ffffff) | 0x14000000; + tcg_out32(s, insn); +} + +static inline void tcg_out_goto_cond_noaddr(TCGContext *s, TCGCond c) +{ + /* see comments in tcg_out_goto_noaddr */ + uint32_t insn; + insn = tcg_in32(s) & (0x07ffff << 5); + insn |= 0x54000000 | tcg_cond_to_aarch64[c]; + tcg_out32(s, insn); +} + +static inline void tcg_out_goto_cond(TCGContext *s, TCGCond c, + tcg_target_long target) +{ + tcg_target_long offset; + offset = (target - (tcg_target_long)s->code_ptr) / 4; + + if (offset < -0x40000 || offset >= 0x40000) { + /* out of 19bit range */ + tcg_abort(); + } + + offset &= 0x7ffff; + tcg_out32(s, 0x54000000 | tcg_cond_to_aarch64[c] | offset << 5); +} + +static inline void tcg_out_callr(TCGContext *s, TCGReg reg) +{ + tcg_out32(s, 0xd63f0000 | reg << 5); +} + +static inline void tcg_out_gotor(TCGContext *s, TCGReg reg) +{ + tcg_out32(s, 0xd61f0000 | reg << 5); +} + +static inline void tcg_out_call(TCGContext *s, tcg_target_long target) +{ + tcg_target_long offset; + + offset = (target - (tcg_target_long)s->code_ptr) / 4; + + if (offset < -0x02000000 || offset >= 0x02000000) { /* out of 26bit rng */ + tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP, target); + tcg_out_callr(s, TCG_REG_TMP); + } else { + tcg_out32(s, 0x94000000 | (offset & 0x03ffffff)); + } +} + +/* encode a logical immediate, mapping user parameter + M=set bits pattern length to S=M-1 */ +static inline unsigned int +aarch64_limm(unsigned int m, unsigned int r) +{ + assert(m > 0); + return r << 16 | (m - 1) << 10; +} + +/* test a register against an immediate bit pattern made of + M set bits rotated right by R. + Examples: + to test a 32/64 reg against 0x00000007, pass M = 3, R = 0. + to test a 32/64 reg against 0x000000ff, pass M = 8, R = 0. + to test a 32bit reg against 0xff000000, pass M = 8, R = 8. + to test a 32bit reg against 0xff0000ff, pass M = 16, R = 8. + */ +static inline void tcg_out_tst(TCGContext *s, int ext, TCGReg rn, + unsigned int m, unsigned int r) +{ + /* using TST alias of ANDS XZR, Xn,#bimm64 0x7200001f */ + unsigned int base = ext ? 0xf240001f : 0x7200001f; + tcg_out32(s, base | aarch64_limm(m, r) | rn << 5); +} + +/* and a register with a bit pattern, similarly to TST, no flags change */ +static inline void tcg_out_andi(TCGContext *s, int ext, TCGReg rd, TCGReg rn, + unsigned int m, unsigned int r) +{ + /* using AND 0x12000000 */ + unsigned int base = ext ? 0x92400000 : 0x12000000; + tcg_out32(s, base | aarch64_limm(m, r) | rn << 5 | rd); +} + +static inline void tcg_out_ret(TCGContext *s) +{ + /* emit RET { LR } */ + tcg_out32(s, 0xd65f03c0); +} + +void aarch64_tb_set_jmp_target(uintptr_t jmp_addr, uintptr_t addr) +{ + tcg_target_long target, offset; + target = (tcg_target_long)addr; + offset = (target - (tcg_target_long)jmp_addr) / 4; + + if (offset < -0x02000000 || offset >= 0x02000000) { + /* out of 26bit range */ + tcg_abort(); + } + + patch_reloc((uint8_t *)jmp_addr, R_AARCH64_JUMP26, target, 0); + flush_icache_range(jmp_addr, jmp_addr + 4); +} + +static inline void tcg_out_goto_label(TCGContext *s, int label_index) +{ + TCGLabel *l = &s->labels[label_index]; + + if (!l->has_value) { + tcg_out_reloc(s, s->code_ptr, R_AARCH64_JUMP26, label_index, 0); + tcg_out_goto_noaddr(s); + } else { + tcg_out_goto(s, l->u.value); + } +} + +static inline void tcg_out_goto_label_cond(TCGContext *s, + TCGCond c, int label_index) +{ + TCGLabel *l = &s->labels[label_index]; + + if (!l->has_value) { + tcg_out_reloc(s, s->code_ptr, R_AARCH64_CONDBR19, label_index, 0); + tcg_out_goto_cond_noaddr(s, c); + } else { + tcg_out_goto_cond(s, c, l->u.value); + } +} + +static inline void tcg_out_rev(TCGContext *s, int ext, TCGReg rd, TCGReg rm) +{ + /* using REV 0x5ac00800 */ + unsigned int base = ext ? 0xdac00c00 : 0x5ac00800; + tcg_out32(s, base | rm << 5 | rd); +} + +static inline void tcg_out_rev16(TCGContext *s, int ext, TCGReg rd, TCGReg rm) +{ + /* using REV16 0x5ac00400 */ + unsigned int base = ext ? 0xdac00400 : 0x5ac00400; + tcg_out32(s, base | rm << 5 | rd); +} + +static inline void tcg_out_sxt(TCGContext *s, int ext, int s_bits, + TCGReg rd, TCGReg rn) +{ + /* using ALIASes SXTB 0x13001c00, SXTH 0x13003c00, SXTW 0x93407c00 + of SBFM Xd, Xn, #0, #7|15|31 */ + int bits = 8 * (1 << s_bits) - 1; + tcg_out_sbfm(s, ext, rd, rn, 0, bits); +} + +static inline void tcg_out_uxt(TCGContext *s, int s_bits, + TCGReg rd, TCGReg rn) +{ + /* using ALIASes UXTB 0x53001c00, UXTH 0x53003c00 + of UBFM Wd, Wn, #0, #7|15 */ + int bits = 8 * (1 << s_bits) - 1; + tcg_out_ubfm(s, 0, rd, rn, 0, bits); +} + +#ifdef CONFIG_SOFTMMU +#include "exec/softmmu_defs.h" + +/* helper signature: helper_ld_mmu(CPUState *env, target_ulong addr, + int mmu_idx) */ +static const void * const qemu_ld_helpers[4] = { + helper_ldb_mmu, + helper_ldw_mmu, + helper_ldl_mmu, + helper_ldq_mmu, +}; + +/* helper signature: helper_st_mmu(CPUState *env, target_ulong addr, + uintxx_t val, int mmu_idx) */ +static const void * const qemu_st_helpers[4] = { + helper_stb_mmu, + helper_stw_mmu, + helper_stl_mmu, + helper_stq_mmu, +}; + +#else /* !CONFIG_SOFTMMU */ + +static void tcg_out_qemu_ld_direct(TCGContext *s, int opc, TCGReg data_r, + TCGReg addr_r, TCGReg off_r) +{ + switch (opc) { + case 0: + tcg_out_ldst_r(s, LDST_8, LDST_LD, data_r, addr_r, off_r); + break; + case 0 | 4: + tcg_out_ldst_r(s, LDST_8, LDST_LD_S_X, data_r, addr_r, off_r); + break; + case 1: + tcg_out_ldst_r(s, LDST_16, LDST_LD, data_r, addr_r, off_r); + if (TCG_LDST_BSWAP) { + tcg_out_rev16(s, 0, data_r, data_r); + } + break; + case 1 | 4: + if (TCG_LDST_BSWAP) { + tcg_out_ldst_r(s, LDST_16, LDST_LD, data_r, addr_r, off_r); + tcg_out_rev16(s, 0, data_r, data_r); + tcg_out_sxt(s, 1, 1, data_r, data_r); + } else { + tcg_out_ldst_r(s, LDST_16, LDST_LD_S_X, data_r, addr_r, off_r); + } + break; + case 2: + tcg_out_ldst_r(s, LDST_32, LDST_LD, data_r, addr_r, off_r); + if (TCG_LDST_BSWAP) { + tcg_out_rev(s, 0, data_r, data_r); + } + break; + case 2 | 4: + if (TCG_LDST_BSWAP) { + tcg_out_ldst_r(s, LDST_32, LDST_LD, data_r, addr_r, off_r); + tcg_out_rev(s, 0, data_r, data_r); + tcg_out_sxt(s, 1, 2, data_r, data_r); + } else { + tcg_out_ldst_r(s, LDST_32, LDST_LD_S_X, data_r, addr_r, off_r); + } + break; + case 3: + tcg_out_ldst_r(s, LDST_64, LDST_LD, data_r, addr_r, off_r); + if (TCG_LDST_BSWAP) { + tcg_out_rev(s, 1, data_r, data_r); + } + break; + default: + tcg_abort(); + } +} + +static void tcg_out_qemu_st_direct(TCGContext *s, int opc, TCGReg data_r, + TCGReg addr_r, TCGReg off_r) +{ + switch (opc) { + case 0: + tcg_out_ldst_r(s, LDST_8, LDST_ST, data_r, addr_r, off_r); + break; + case 1: + if (TCG_LDST_BSWAP) { + tcg_out_rev16(s, 0, TCG_REG_TMP, data_r); + tcg_out_ldst_r(s, LDST_16, LDST_ST, TCG_REG_TMP, addr_r, off_r); + } else { + tcg_out_ldst_r(s, LDST_16, LDST_ST, data_r, addr_r, off_r); + } + break; + case 2: + if (TCG_LDST_BSWAP) { + tcg_out_rev(s, 0, TCG_REG_TMP, data_r); + tcg_out_ldst_r(s, LDST_32, LDST_ST, TCG_REG_TMP, addr_r, off_r); + } else { + tcg_out_ldst_r(s, LDST_32, LDST_ST, data_r, addr_r, off_r); + } + break; + case 3: + if (TCG_LDST_BSWAP) { + tcg_out_rev(s, 1, TCG_REG_TMP, data_r); + tcg_out_ldst_r(s, LDST_64, LDST_ST, TCG_REG_TMP, addr_r, off_r); + } else { + tcg_out_ldst_r(s, LDST_64, LDST_ST, data_r, addr_r, off_r); + } + break; + default: + tcg_abort(); + } +} +#endif /* CONFIG_SOFTMMU */ + +static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc) +{ + TCGReg addr_reg, data_reg; +#ifdef CONFIG_SOFTMMU + int mem_index, s_bits; +#endif + data_reg = args[0]; + addr_reg = args[1]; + +#ifdef CONFIG_SOFTMMU + mem_index = args[2]; + s_bits = opc & 3; + + /* TODO: insert TLB lookup here */ + + /* all arguments passed via registers */ + tcg_out_movr(s, 1, TCG_REG_X0, TCG_AREG0); + tcg_out_movr(s, (TARGET_LONG_BITS == 64), TCG_REG_X1, addr_reg); + tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_X2, mem_index); + tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP, + (tcg_target_long)qemu_ld_helpers[s_bits]); + tcg_out_callr(s, TCG_REG_TMP); + + if (opc & 0x04) { /* sign extend */ + tcg_out_sxt(s, 1, s_bits, data_reg, TCG_REG_X0); + } else { + tcg_out_movr(s, 1, data_reg, TCG_REG_X0); + } + +#else /* !CONFIG_SOFTMMU */ + tcg_out_qemu_ld_direct(s, opc, data_reg, addr_reg, + GUEST_BASE ? TCG_REG_GUEST_BASE : TCG_REG_XZR); +#endif /* CONFIG_SOFTMMU */ +} + +static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc) +{ + TCGReg addr_reg, data_reg; +#ifdef CONFIG_SOFTMMU + int mem_index, s_bits; +#endif + data_reg = args[0]; + addr_reg = args[1]; + +#ifdef CONFIG_SOFTMMU + mem_index = args[2]; + s_bits = opc & 3; + + /* TODO: insert TLB lookup here */ + + /* all arguments passed via registers */ + tcg_out_movr(s, 1, TCG_REG_X0, TCG_AREG0); + tcg_out_movr(s, (TARGET_LONG_BITS == 64), TCG_REG_X1, addr_reg); + tcg_out_movr(s, 1, TCG_REG_X2, data_reg); + tcg_out_movi(s, TCG_TYPE_I32, TCG_REG_X3, mem_index); + tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_TMP, + (tcg_target_long)qemu_st_helpers[s_bits]); + tcg_out_callr(s, TCG_REG_TMP); + +#else /* !CONFIG_SOFTMMU */ + tcg_out_qemu_st_direct(s, opc, data_reg, addr_reg, + GUEST_BASE ? TCG_REG_GUEST_BASE : TCG_REG_XZR); +#endif /* CONFIG_SOFTMMU */ +} + +static uint8_t *tb_ret_addr; + +/* callee stack use example: + stp x29, x30, [sp,#-32]! + mov x29, sp + stp x1, x2, [sp,#16] + ... + ldp x1, x2, [sp,#16] + ldp x29, x30, [sp],#32 + ret +*/ + +/* push r1 and r2, and alloc stack space for a total of + alloc_n elements (1 element=16 bytes, must be between 1 and 31. */ +static inline void tcg_out_push_pair(TCGContext *s, TCGReg addr, + TCGReg r1, TCGReg r2, int alloc_n) +{ + /* using indexed scaled simm7 STP 0x28800000 | (ext) | 0x01000000 (pre-idx) + | alloc_n * (-1) << 16 | r2 << 10 | addr << 5 | r1 */ + assert(alloc_n > 0 && alloc_n < 0x20); + alloc_n = (-alloc_n) & 0x3f; + tcg_out32(s, 0xa9800000 | alloc_n << 16 | r2 << 10 | addr << 5 | r1); +} + +/* dealloc stack space for a total of alloc_n elements and pop r1, r2. */ +static inline void tcg_out_pop_pair(TCGContext *s, TCGReg addr, + TCGReg r1, TCGReg r2, int alloc_n) +{ + /* using indexed scaled simm7 LDP 0x28c00000 | (ext) | nothing (post-idx) + | alloc_n << 16 | r2 << 10 | addr << 5 | r1 */ + assert(alloc_n > 0 && alloc_n < 0x20); + tcg_out32(s, 0xa8c00000 | alloc_n << 16 | r2 << 10 | addr << 5 | r1); +} + +static inline void tcg_out_store_pair(TCGContext *s, TCGReg addr, + TCGReg r1, TCGReg r2, int idx) +{ + /* using register pair offset simm7 STP 0x29000000 | (ext) + | idx << 16 | r2 << 10 | addr << 5 | r1 */ + assert(idx > 0 && idx < 0x20); + tcg_out32(s, 0xa9000000 | idx << 16 | r2 << 10 | addr << 5 | r1); +} + +static inline void tcg_out_load_pair(TCGContext *s, TCGReg addr, + TCGReg r1, TCGReg r2, int idx) +{ + /* using register pair offset simm7 LDP 0x29400000 | (ext) + | idx << 16 | r2 << 10 | addr << 5 | r1 */ + assert(idx > 0 && idx < 0x20); + tcg_out32(s, 0xa9400000 | idx << 16 | r2 << 10 | addr << 5 | r1); +} + +static void tcg_out_op(TCGContext *s, TCGOpcode opc, + const TCGArg *args, const int *const_args) +{ + /* ext will be set in the switch below, which will fall through to the + common code. It triggers the use of extended regs where appropriate. */ + int ext = 0; + + switch (opc) { + case INDEX_op_exit_tb: + tcg_out_movi(s, TCG_TYPE_I64, TCG_REG_X0, args[0]); + tcg_out_goto(s, (tcg_target_long)tb_ret_addr); + break; + + case INDEX_op_goto_tb: +#ifndef USE_DIRECT_JUMP +#error "USE_DIRECT_JUMP required for aarch64" +#endif + assert(s->tb_jmp_offset != NULL); /* consistency for USE_DIRECT_JUMP */ + s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf; + /* actual branch destination will be patched by + aarch64_tb_set_jmp_target later, beware retranslation. */ + tcg_out_goto_noaddr(s); + s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf; + break; + + case INDEX_op_call: + if (const_args[0]) { + tcg_out_call(s, args[0]); + } else { + tcg_out_callr(s, args[0]); + } + break; + + case INDEX_op_br: + tcg_out_goto_label(s, args[0]); + break; + + case INDEX_op_ld_i32: + case INDEX_op_ld_i64: + case INDEX_op_st_i32: + case INDEX_op_st_i64: + case INDEX_op_ld8u_i32: + case INDEX_op_ld8s_i32: + case INDEX_op_ld16u_i32: + case INDEX_op_ld16s_i32: + case INDEX_op_ld8u_i64: + case INDEX_op_ld8s_i64: + case INDEX_op_ld16u_i64: + case INDEX_op_ld16s_i64: + case INDEX_op_ld32u_i64: + case INDEX_op_ld32s_i64: + 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: + tcg_out_ldst(s, aarch64_ldst_get_data(opc), aarch64_ldst_get_type(opc), + args[0], args[1], args[2]); + break; + + case INDEX_op_mov_i64: + ext = 1; /* fall through */ + case INDEX_op_mov_i32: + tcg_out_movr(s, ext, args[0], args[1]); + break; + + case INDEX_op_movi_i64: + tcg_out_movi(s, TCG_TYPE_I64, args[0], args[1]); + break; + case INDEX_op_movi_i32: + tcg_out_movi(s, TCG_TYPE_I32, args[0], args[1]); + break; + + case INDEX_op_add_i64: + ext = 1; /* fall through */ + case INDEX_op_add_i32: + tcg_out_arith(s, ARITH_ADD, ext, args[0], args[1], args[2], 0); + break; + + case INDEX_op_sub_i64: + ext = 1; /* fall through */ + case INDEX_op_sub_i32: + tcg_out_arith(s, ARITH_SUB, ext, args[0], args[1], args[2], 0); + break; + + case INDEX_op_and_i64: + ext = 1; /* fall through */ + case INDEX_op_and_i32: + tcg_out_arith(s, ARITH_AND, ext, args[0], args[1], args[2], 0); + break; + + case INDEX_op_or_i64: + ext = 1; /* fall through */ + case INDEX_op_or_i32: + tcg_out_arith(s, ARITH_OR, ext, args[0], args[1], args[2], 0); + break; + + case INDEX_op_xor_i64: + ext = 1; /* fall through */ + case INDEX_op_xor_i32: + tcg_out_arith(s, ARITH_XOR, ext, args[0], args[1], args[2], 0); + break; + + case INDEX_op_mul_i64: + ext = 1; /* fall through */ + case INDEX_op_mul_i32: + tcg_out_mul(s, ext, args[0], args[1], args[2]); + break; + + case INDEX_op_shl_i64: + ext = 1; /* fall through */ + case INDEX_op_shl_i32: + if (const_args[2]) { /* LSL / UBFM Wd, Wn, (32 - m) */ + tcg_out_shl(s, ext, args[0], args[1], args[2]); + } else { /* LSL / LSLV */ + tcg_out_shiftrot_reg(s, SRR_SHL, ext, args[0], args[1], args[2]); + } + break; + + case INDEX_op_shr_i64: + ext = 1; /* fall through */ + case INDEX_op_shr_i32: + if (const_args[2]) { /* LSR / UBFM Wd, Wn, m, 31 */ + tcg_out_shr(s, ext, args[0], args[1], args[2]); + } else { /* LSR / LSRV */ + tcg_out_shiftrot_reg(s, SRR_SHR, ext, args[0], args[1], args[2]); + } + break; + + case INDEX_op_sar_i64: + ext = 1; /* fall through */ + case INDEX_op_sar_i32: + if (const_args[2]) { /* ASR / SBFM Wd, Wn, m, 31 */ + tcg_out_sar(s, ext, args[0], args[1], args[2]); + } else { /* ASR / ASRV */ + tcg_out_shiftrot_reg(s, SRR_SAR, ext, args[0], args[1], args[2]); + } + break; + + case INDEX_op_rotr_i64: + ext = 1; /* fall through */ + case INDEX_op_rotr_i32: + if (const_args[2]) { /* ROR / EXTR Wd, Wm, Wm, m */ + tcg_out_rotr(s, ext, args[0], args[1], args[2]); + } else { /* ROR / RORV */ + tcg_out_shiftrot_reg(s, SRR_ROR, ext, args[0], args[1], args[2]); + } + break; + + case INDEX_op_rotl_i64: + ext = 1; /* fall through */ + case INDEX_op_rotl_i32: /* same as rotate right by (32 - m) */ + if (const_args[2]) { /* ROR / EXTR Wd, Wm, Wm, 32 - m */ + tcg_out_rotl(s, ext, args[0], args[1], args[2]); + } else { + tcg_out_arith(s, ARITH_SUB, 0, + TCG_REG_TMP, TCG_REG_XZR, args[2], 0); + tcg_out_shiftrot_reg(s, SRR_ROR, ext, + args[0], args[1], TCG_REG_TMP); + } + break; + + case INDEX_op_brcond_i64: + ext = 1; /* fall through */ + case INDEX_op_brcond_i32: /* CMP 0, 1, cond(2), label 3 */ + tcg_out_cmp(s, ext, args[0], args[1], 0); + tcg_out_goto_label_cond(s, args[2], args[3]); + break; + + case INDEX_op_setcond_i64: + ext = 1; /* fall through */ + case INDEX_op_setcond_i32: + tcg_out_cmp(s, ext, args[1], args[2], 0); + tcg_out_cset(s, 0, args[0], args[3]); + break; + + case INDEX_op_qemu_ld8u: + tcg_out_qemu_ld(s, args, 0 | 0); + break; + case INDEX_op_qemu_ld8s: + tcg_out_qemu_ld(s, args, 4 | 0); + break; + case INDEX_op_qemu_ld16u: + tcg_out_qemu_ld(s, args, 0 | 1); + break; + case INDEX_op_qemu_ld16s: + tcg_out_qemu_ld(s, args, 4 | 1); + break; + case INDEX_op_qemu_ld32u: + tcg_out_qemu_ld(s, args, 0 | 2); + break; + case INDEX_op_qemu_ld32s: + tcg_out_qemu_ld(s, args, 4 | 2); + break; + case INDEX_op_qemu_ld32: + tcg_out_qemu_ld(s, args, 0 | 2); + break; + case INDEX_op_qemu_ld64: + tcg_out_qemu_ld(s, args, 0 | 3); + break; + case INDEX_op_qemu_st8: + tcg_out_qemu_st(s, args, 0); + break; + case INDEX_op_qemu_st16: + tcg_out_qemu_st(s, args, 1); + break; + case INDEX_op_qemu_st32: + tcg_out_qemu_st(s, args, 2); + break; + case INDEX_op_qemu_st64: + tcg_out_qemu_st(s, args, 3); + break; + + case INDEX_op_bswap64_i64: + ext = 1; /* fall through */ + case INDEX_op_bswap32_i64: + case INDEX_op_bswap32_i32: + tcg_out_rev(s, ext, args[0], args[1]); + break; + case INDEX_op_bswap16_i64: + case INDEX_op_bswap16_i32: + tcg_out_rev16(s, 0, args[0], args[1]); + break; + + case INDEX_op_ext8s_i64: + ext = 1; /* fall through */ + case INDEX_op_ext8s_i32: + tcg_out_sxt(s, ext, 0, args[0], args[1]); + break; + case INDEX_op_ext16s_i64: + ext = 1; /* fall through */ + case INDEX_op_ext16s_i32: + tcg_out_sxt(s, ext, 1, args[0], args[1]); + break; + case INDEX_op_ext32s_i64: + tcg_out_sxt(s, 1, 2, args[0], args[1]); + break; + case INDEX_op_ext8u_i64: + case INDEX_op_ext8u_i32: + tcg_out_uxt(s, 0, args[0], args[1]); + break; + case INDEX_op_ext16u_i64: + case INDEX_op_ext16u_i32: + tcg_out_uxt(s, 1, args[0], args[1]); + break; + case INDEX_op_ext32u_i64: + tcg_out_movr(s, 0, args[0], args[1]); + break; + + default: + tcg_abort(); /* opcode not implemented */ + } +} + +static const TCGTargetOpDef aarch64_op_defs[] = { + { INDEX_op_exit_tb, { } }, + { INDEX_op_goto_tb, { } }, + { INDEX_op_call, { "ri" } }, + { INDEX_op_br, { } }, + + { INDEX_op_mov_i32, { "r", "r" } }, + { INDEX_op_mov_i64, { "r", "r" } }, + + { INDEX_op_movi_i32, { "r" } }, + { INDEX_op_movi_i64, { "r" } }, + + { INDEX_op_ld8u_i32, { "r", "r" } }, + { INDEX_op_ld8s_i32, { "r", "r" } }, + { INDEX_op_ld16u_i32, { "r", "r" } }, + { INDEX_op_ld16s_i32, { "r", "r" } }, + { INDEX_op_ld_i32, { "r", "r" } }, + { INDEX_op_ld8u_i64, { "r", "r" } }, + { INDEX_op_ld8s_i64, { "r", "r" } }, + { INDEX_op_ld16u_i64, { "r", "r" } }, + { INDEX_op_ld16s_i64, { "r", "r" } }, + { INDEX_op_ld32u_i64, { "r", "r" } }, + { INDEX_op_ld32s_i64, { "r", "r" } }, + { INDEX_op_ld_i64, { "r", "r" } }, + + { INDEX_op_st8_i32, { "r", "r" } }, + { INDEX_op_st16_i32, { "r", "r" } }, + { INDEX_op_st_i32, { "r", "r" } }, + { INDEX_op_st8_i64, { "r", "r" } }, + { INDEX_op_st16_i64, { "r", "r" } }, + { INDEX_op_st32_i64, { "r", "r" } }, + { INDEX_op_st_i64, { "r", "r" } }, + + { INDEX_op_add_i32, { "r", "r", "r" } }, + { INDEX_op_add_i64, { "r", "r", "r" } }, + { INDEX_op_sub_i32, { "r", "r", "r" } }, + { INDEX_op_sub_i64, { "r", "r", "r" } }, + { INDEX_op_mul_i32, { "r", "r", "r" } }, + { INDEX_op_mul_i64, { "r", "r", "r" } }, + { INDEX_op_and_i32, { "r", "r", "r" } }, + { INDEX_op_and_i64, { "r", "r", "r" } }, + { INDEX_op_or_i32, { "r", "r", "r" } }, + { INDEX_op_or_i64, { "r", "r", "r" } }, + { INDEX_op_xor_i32, { "r", "r", "r" } }, + { INDEX_op_xor_i64, { "r", "r", "r" } }, + + { INDEX_op_shl_i32, { "r", "r", "ri" } }, + { INDEX_op_shr_i32, { "r", "r", "ri" } }, + { INDEX_op_sar_i32, { "r", "r", "ri" } }, + { INDEX_op_rotl_i32, { "r", "r", "ri" } }, + { INDEX_op_rotr_i32, { "r", "r", "ri" } }, + { INDEX_op_shl_i64, { "r", "r", "ri" } }, + { INDEX_op_shr_i64, { "r", "r", "ri" } }, + { INDEX_op_sar_i64, { "r", "r", "ri" } }, + { INDEX_op_rotl_i64, { "r", "r", "ri" } }, + { INDEX_op_rotr_i64, { "r", "r", "ri" } }, + + { INDEX_op_brcond_i32, { "r", "r" } }, + { INDEX_op_setcond_i32, { "r", "r", "r" } }, + { INDEX_op_brcond_i64, { "r", "r" } }, + { INDEX_op_setcond_i64, { "r", "r", "r" } }, + + { INDEX_op_qemu_ld8u, { "r", "l" } }, + { INDEX_op_qemu_ld8s, { "r", "l" } }, + { INDEX_op_qemu_ld16u, { "r", "l" } }, + { INDEX_op_qemu_ld16s, { "r", "l" } }, + { INDEX_op_qemu_ld32u, { "r", "l" } }, + { INDEX_op_qemu_ld32s, { "r", "l" } }, + + { INDEX_op_qemu_ld32, { "r", "l" } }, + { INDEX_op_qemu_ld64, { "r", "l" } }, + + { INDEX_op_qemu_st8, { "l", "l" } }, + { INDEX_op_qemu_st16, { "l", "l" } }, + { INDEX_op_qemu_st32, { "l", "l" } }, + { INDEX_op_qemu_st64, { "l", "l" } }, + + { INDEX_op_bswap16_i32, { "r", "r" } }, + { INDEX_op_bswap32_i32, { "r", "r" } }, + { INDEX_op_bswap16_i64, { "r", "r" } }, + { INDEX_op_bswap32_i64, { "r", "r" } }, + { INDEX_op_bswap64_i64, { "r", "r" } }, + + { INDEX_op_ext8s_i32, { "r", "r" } }, + { INDEX_op_ext16s_i32, { "r", "r" } }, + { INDEX_op_ext8u_i32, { "r", "r" } }, + { INDEX_op_ext16u_i32, { "r", "r" } }, + + { INDEX_op_ext8s_i64, { "r", "r" } }, + { INDEX_op_ext16s_i64, { "r", "r" } }, + { INDEX_op_ext32s_i64, { "r", "r" } }, + { INDEX_op_ext8u_i64, { "r", "r" } }, + { INDEX_op_ext16u_i64, { "r", "r" } }, + { INDEX_op_ext32u_i64, { "r", "r" } }, + + { -1 }, +}; + +static void tcg_target_init(TCGContext *s) +{ +#if !defined(CONFIG_USER_ONLY) + /* fail safe */ + if ((1ULL << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry)) { + tcg_abort(); + } +#endif + tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffffffff); + tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I64], 0, 0xffffffff); + + tcg_regset_set32(tcg_target_call_clobber_regs, 0, + (1 << TCG_REG_X0) | (1 << TCG_REG_X1) | + (1 << TCG_REG_X2) | (1 << TCG_REG_X3) | + (1 << TCG_REG_X4) | (1 << TCG_REG_X5) | + (1 << TCG_REG_X6) | (1 << TCG_REG_X7) | + (1 << TCG_REG_X8) | (1 << TCG_REG_X9) | + (1 << TCG_REG_X10) | (1 << TCG_REG_X11) | + (1 << TCG_REG_X12) | (1 << TCG_REG_X13) | + (1 << TCG_REG_X14) | (1 << TCG_REG_X15) | + (1 << TCG_REG_X16) | (1 << TCG_REG_X17) | + (1 << TCG_REG_X18)); + + tcg_regset_clear(s->reserved_regs); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_FP); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_X18); /* platform register */ + + tcg_add_target_add_op_defs(aarch64_op_defs); +} + +static inline void tcg_out_addi(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, unsigned int aimm) +{ + /* add immediate aimm unsigned 12bit value (we use LSL 0 - no shift) */ + /* using ADD 0x11000000 | (ext) | (aimm << 10) | (rn << 5) | rd */ + unsigned int base = ext ? 0x91000000 : 0x11000000; + assert(aimm <= 0xfff); + tcg_out32(s, base | (aimm << 10) | (rn << 5) | rd); +} + +static inline void tcg_out_subi(TCGContext *s, int ext, + TCGReg rd, TCGReg rn, unsigned int aimm) +{ + /* sub immediate aimm unsigned 12bit value (we use LSL 0 - no shift) */ + /* using SUB 0x51000000 | (ext) | (aimm << 10) | (rn << 5) | rd */ + unsigned int base = ext ? 0xd1000000 : 0x51000000; + assert(aimm <= 0xfff); + tcg_out32(s, base | (aimm << 10) | (rn << 5) | rd); +} + +static void tcg_target_qemu_prologue(TCGContext *s) +{ + /* NB: frame sizes are in 16 byte stack units! */ + int frame_size_callee_saved, frame_size_tcg_locals; + TCGReg r; + + /* save pairs (FP, LR) and (X19, X20) .. (X27, X28) */ + frame_size_callee_saved = (1) + (TCG_REG_X28 - TCG_REG_X19) / 2 + 1; + + /* frame size requirement for TCG local variables */ + frame_size_tcg_locals = TCG_STATIC_CALL_ARGS_SIZE + + CPU_TEMP_BUF_NLONGS * sizeof(long) + + (TCG_TARGET_STACK_ALIGN - 1); + frame_size_tcg_locals &= ~(TCG_TARGET_STACK_ALIGN - 1); + frame_size_tcg_locals /= TCG_TARGET_STACK_ALIGN; + + /* push (FP, LR) and update sp */ + tcg_out_push_pair(s, TCG_REG_SP, + TCG_REG_FP, TCG_REG_LR, frame_size_callee_saved); + + /* FP -> callee_saved */ + tcg_out_movr_sp(s, 1, TCG_REG_FP, TCG_REG_SP); + + /* store callee-preserved regs x19..x28 using FP -> callee_saved */ + for (r = TCG_REG_X19; r <= TCG_REG_X27; r += 2) { + int idx = (r - TCG_REG_X19) / 2 + 1; + tcg_out_store_pair(s, TCG_REG_FP, r, r + 1, idx); + } + + /* make stack space for TCG locals */ + tcg_out_subi(s, 1, TCG_REG_SP, TCG_REG_SP, + frame_size_tcg_locals * TCG_TARGET_STACK_ALIGN); + /* inform TCG about how to find TCG locals with register, offset, size */ + tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, + CPU_TEMP_BUF_NLONGS * sizeof(long)); + +#if defined(CONFIG_USE_GUEST_BASE) + 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_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); + tcg_out_gotor(s, tcg_target_call_iarg_regs[1]); + + tb_ret_addr = s->code_ptr; + + /* remove TCG locals stack space */ + tcg_out_addi(s, 1, TCG_REG_SP, TCG_REG_SP, + frame_size_tcg_locals * TCG_TARGET_STACK_ALIGN); + + /* restore registers x19..x28. + FP must be preserved, so it still points to callee_saved area */ + for (r = TCG_REG_X19; r <= TCG_REG_X27; r += 2) { + int idx = (r - TCG_REG_X19) / 2 + 1; + tcg_out_load_pair(s, TCG_REG_FP, r, r + 1, idx); + } + + /* pop (FP, LR), restore SP to previous frame, return */ + tcg_out_pop_pair(s, TCG_REG_SP, + TCG_REG_FP, TCG_REG_LR, frame_size_callee_saved); + tcg_out_ret(s); +} |