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target-i386: Introduce mo_stacksize 

Centralize computation of a MO_SIZE for the stack pointer.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <1450379966-28198-3-git-send-email-rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
master
Richard Henderson 2015-12-17 11:19:18 -08:00 committed by Paolo Bonzini
parent ca2f29f555
commit 64ae256c24
1 changed files with 10 additions and 14 deletions
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24
target-i386/translate.c
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@ -304,6 +304,12 @@ static inline TCGMemOp mo_pushpop(DisasContext *s, TCGMemOp ot)
}
}
/* Select the size of the stack pointer. */
static inline TCGMemOp mo_stacksize(DisasContext *s)
{
return CODE64(s) ? MO_64 : s->ss32 ? MO_32 : MO_16;
}
/* Select only size 64 else 32. Used for SSE operand sizes. */
static inline TCGMemOp mo_64_32(TCGMemOp ot)
{
@ -2289,31 +2295,22 @@ gen_svm_check_intercept(DisasContext *s, target_ulong pc_start, uint64_t type)
static inline void gen_stack_update(DisasContext *s, int addend)
{
#ifdef TARGET_X86_64
if (CODE64(s)) {
gen_op_add_reg_im(MO_64, R_ESP, addend);
} else
#endif
if (s->ss32) {
gen_op_add_reg_im(MO_32, R_ESP, addend);
} else {
gen_op_add_reg_im(MO_16, R_ESP, addend);
}
gen_op_add_reg_im(mo_stacksize(s), R_ESP, addend);
}
/* Generate a push. It depends on ss32, addseg and dflag. */
static void gen_push_v(DisasContext *s, TCGv val)
{
TCGMemOp a_ot, d_ot = mo_pushpop(s, s->dflag);
TCGMemOp d_ot = mo_pushpop(s, s->dflag);
TCGMemOp a_ot = mo_stacksize(s);
int size = 1 << d_ot;
TCGv new_esp = cpu_A0;
tcg_gen_subi_tl(cpu_A0, cpu_regs[R_ESP], size);
if (CODE64(s)) {
a_ot = MO_64;
/* No special handling. */
} else if (s->ss32) {
a_ot = MO_32;
if (s->addseg) {
new_esp = cpu_tmp4;
tcg_gen_mov_tl(new_esp, cpu_A0);
@ -2322,7 +2319,6 @@ static void gen_push_v(DisasContext *s, TCGv val)
tcg_gen_ext32u_tl(cpu_A0, cpu_A0);
}
} else {
a_ot = MO_16;
new_esp = cpu_tmp4;
tcg_gen_ext16u_tl(cpu_A0, cpu_A0);
tcg_gen_mov_tl(new_esp, cpu_A0);