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authorRichard Henderson <rth@twiddle.net>2015-12-17 11:19:18 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2016-02-09 15:45:27 +0100
commit64ae256c2450262e27f07657c5734d3197458d95 (patch)
treede7266399bd0199b635e12773a2ff2658defadfa /target-i386
parentca2f29f555805d07fb0b9ebfbbfc4e3656530977 (diff)
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>
Diffstat (limited to 'target-i386')
-rw-r--r--target-i386/translate.c24
1 files changed, 10 insertions, 14 deletions
diff --git a/target-i386/translate.c b/target-i386/translate.c
index 4d65eb309f..836ef1c101 100644
--- a/target-i386/translate.c
+++ b/target-i386/translate.c
@@ -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);