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This is a common pattern and it is not a huge burden to add the extra arguments to the only caller of gen_stack_A0(). Signed-off-by: Paolo Bonzini Reviewed-by: Richard Henderson --- target/i386/tcg/translate.c | 51 +++++++++++++++---------------------- target/i386/tcg/emit.c.inc | 2 +- 2 files changed, 22 insertions(+), 31 deletions(-) diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 7b6bc486a63..8354209b037 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -2028,24 +2028,27 @@ static inline void gen_stack_update(DisasContext *s, int addend) gen_op_add_reg_im(s, mo_stacksize(s), R_ESP, addend); } +static void gen_lea_ss_ofs(DisasContext *s, TCGv dest, TCGv src, target_ulong offset) +{ + if (offset) { + tcg_gen_addi_tl(dest, src, offset); + src = dest; + } + gen_lea_v_seg_dest(s, mo_stacksize(s), dest, src, R_SS, -1); +} + /* Generate a push. It depends on ss32, addseg and dflag. */ static void gen_push_v(DisasContext *s, TCGv val) { MemOp d_ot = mo_pushpop(s, s->dflag); MemOp a_ot = mo_stacksize(s); int size = 1 << d_ot; - TCGv new_esp = s->A0; + TCGv new_esp = tcg_temp_new(); - tcg_gen_subi_tl(s->A0, cpu_regs[R_ESP], size); - - if (!CODE64(s)) { - if (ADDSEG(s)) { - new_esp = tcg_temp_new(); - tcg_gen_mov_tl(new_esp, s->A0); - } - gen_lea_v_seg(s, a_ot, s->A0, R_SS, -1); - } + tcg_gen_subi_tl(new_esp, cpu_regs[R_ESP], size); + /* Now reduce the value to the address size and apply SS base. */ + gen_lea_ss_ofs(s, s->A0, new_esp, 0); gen_op_st_v(s, d_ot, val, s->A0); gen_op_mov_reg_v(s, a_ot, R_ESP, new_esp); } @@ -2055,7 +2058,7 @@ static MemOp gen_pop_T0(DisasContext *s) { MemOp d_ot = mo_pushpop(s, s->dflag); - gen_lea_v_seg_dest(s, mo_stacksize(s), s->T0, cpu_regs[R_ESP], R_SS, -1); + gen_lea_ss_ofs(s, s->T0, cpu_regs[R_ESP], 0); gen_op_ld_v(s, d_ot, s->T0, s->T0); return d_ot; @@ -2066,21 +2069,14 @@ static inline void gen_pop_update(DisasContext *s, MemOp ot) gen_stack_update(s, 1 << ot); } -static inline void gen_stack_A0(DisasContext *s) -{ - gen_lea_v_seg(s, mo_stacksize(s), cpu_regs[R_ESP], R_SS, -1); -} - static void gen_pusha(DisasContext *s) { - MemOp s_ot = mo_stacksize(s); MemOp d_ot = s->dflag; int size = 1 << d_ot; int i; for (i = 0; i < 8; i++) { - tcg_gen_addi_tl(s->A0, cpu_regs[R_ESP], (i - 8) * size); - gen_lea_v_seg(s, s_ot, s->A0, R_SS, -1); + gen_lea_ss_ofs(s, s->A0, cpu_regs[R_ESP], (i - 8) * size); gen_op_st_v(s, d_ot, cpu_regs[7 - i], s->A0); } @@ -2089,7 +2085,6 @@ static void gen_pusha(DisasContext *s) static void gen_popa(DisasContext *s) { - MemOp s_ot = mo_stacksize(s); MemOp d_ot = s->dflag; int size = 1 << d_ot; int i; @@ -2099,8 +2094,7 @@ static void gen_popa(DisasContext *s) if (7 - i == R_ESP) { continue; } - tcg_gen_addi_tl(s->A0, cpu_regs[R_ESP], i * size); - gen_lea_v_seg(s, s_ot, s->A0, R_SS, -1); + gen_lea_ss_ofs(s, s->A0, cpu_regs[R_ESP], i * size); gen_op_ld_v(s, d_ot, s->T0, s->A0); gen_op_mov_reg_v(s, d_ot, 7 - i, s->T0); } @@ -2116,7 +2110,7 @@ static void gen_enter(DisasContext *s, int esp_addend, int level) /* Push BP; compute FrameTemp into T1. */ tcg_gen_subi_tl(s->T1, cpu_regs[R_ESP], size); - gen_lea_v_seg(s, a_ot, s->T1, R_SS, -1); + gen_lea_ss_ofs(s, s->A0, s->T1, 0); gen_op_st_v(s, d_ot, cpu_regs[R_EBP], s->A0); level &= 31; @@ -2125,18 +2119,15 @@ static void gen_enter(DisasContext *s, int esp_addend, int level) /* Copy level-1 pointers from the previous frame. */ for (i = 1; i < level; ++i) { - tcg_gen_subi_tl(s->A0, cpu_regs[R_EBP], size * i); - gen_lea_v_seg(s, a_ot, s->A0, R_SS, -1); + gen_lea_ss_ofs(s, s->A0, cpu_regs[R_EBP], -size * i); gen_op_ld_v(s, d_ot, s->tmp0, s->A0); - tcg_gen_subi_tl(s->A0, s->T1, size * i); - gen_lea_v_seg(s, a_ot, s->A0, R_SS, -1); + gen_lea_ss_ofs(s, s->A0, s->T1, -size * i); gen_op_st_v(s, d_ot, s->tmp0, s->A0); } /* Push the current FrameTemp as the last level. */ - tcg_gen_subi_tl(s->A0, s->T1, size * level); - gen_lea_v_seg(s, a_ot, s->A0, R_SS, -1); + gen_lea_ss_ofs(s, s->A0, s->T1, -size * level); gen_op_st_v(s, d_ot, s->T1, s->A0); } @@ -2153,7 +2144,7 @@ static void gen_leave(DisasContext *s) MemOp d_ot = mo_pushpop(s, s->dflag); MemOp a_ot = mo_stacksize(s); - gen_lea_v_seg(s, a_ot, cpu_regs[R_EBP], R_SS, -1); + gen_lea_ss_ofs(s, s->A0, cpu_regs[R_EBP], 0); gen_op_ld_v(s, d_ot, s->T0, s->A0); tcg_gen_addi_tl(s->T1, cpu_regs[R_EBP], 1 << d_ot); diff --git a/target/i386/tcg/emit.c.inc b/target/i386/tcg/emit.c.inc index f293db01b5c..83fa745fd8a 100644 --- a/target/i386/tcg/emit.c.inc +++ b/target/i386/tcg/emit.c.inc @@ -3077,7 +3077,7 @@ static void gen_RETF(DisasContext *s, CPUX86State *env, X86DecodedInsn *decode) int16_t adjust = decode->e.op2 == X86_TYPE_I ? decode->immediate : 0; if (!PE(s) || VM86(s)) { - gen_stack_A0(s); + gen_lea_ss_ofs(s, s->A0, cpu_regs[R_ESP], 0); /* pop offset */ gen_op_ld_v(s, s->dflag, s->T0, s->A0); /* NOTE: keeping EIP updated is not a problem in case of