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target-i386: drop cc_op argument of gen_jcc1

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As in the gen_repz_scas/gen_repz_cmps case, delay setting
CC_OP_DYNAMIC in gen_jcc until after code generation.  All of
gen_jcc1/is_fast_jcc/gen_setcc_slow_T0 now work on s->cc_op, which makes
things a bit easier to follow and to patch.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Paolo Bonzini 2012-10-06 01:36:45 +02:00 committed by Richard Henderson
parent 91642ff806
commit b27fc131fe
1 changed files with 18 additions and 15 deletions
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33
target-i386/translate.c
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@ -954,7 +954,7 @@ static int is_fast_jcc_case(DisasContext *s, int b)
/* generate a conditional jump to label 'l1' according to jump opcode
value 'b'. In the fast case, T0 is guaranted not to be used. */
static inline void gen_jcc1(DisasContext *s, int cc_op, int b, int l1)
static inline void gen_jcc1(DisasContext *s, int b, int l1)
{
int inv, jcc_op, size, cond;
TCGv t0;
@ -962,14 +962,14 @@ static inline void gen_jcc1(DisasContext *s, int cc_op, int b, int l1)
inv = b & 1;
jcc_op = (b >> 1) & 7;
switch(cc_op) {
switch (s->cc_op) {
/* we optimize the cmp/jcc case */
case CC_OP_SUBB:
case CC_OP_SUBW:
case CC_OP_SUBL:
case CC_OP_SUBQ:
size = cc_op - CC_OP_SUBB;
size = s->cc_op - CC_OP_SUBB;
switch(jcc_op) {
case JCC_Z:
fast_jcc_z:
@ -1053,10 +1053,10 @@ static inline void gen_jcc1(DisasContext *s, int cc_op, int b, int l1)
case CC_OP_SARQ:
switch(jcc_op) {
case JCC_Z:
size = (cc_op - CC_OP_ADDB) & 3;
size = (s->cc_op - CC_OP_ADDB) & 3;
goto fast_jcc_z;
case JCC_S:
size = (cc_op - CC_OP_ADDB) & 3;
size = (s->cc_op - CC_OP_ADDB) & 3;
goto fast_jcc_s;
default:
goto slow_jcc;
@ -1197,7 +1197,7 @@ static inline void gen_repz_ ## op(DisasContext *s, int ot, \
gen_ ## op(s, ot); \
gen_op_add_reg_im(s->aflag, R_ECX, -1); \
gen_op_set_cc_op(s->cc_op); \
gen_jcc1(s, s->cc_op, (JCC_Z << 1) | (nz ^ 1), l2); \
gen_jcc1(s, (JCC_Z << 1) | (nz ^ 1), l2); \
if (!s->jmp_opt) \
gen_op_jz_ecx(s->aflag, l2); \
gen_jmp(s, cur_eip); \
@ -2303,13 +2303,15 @@ static inline void gen_goto_tb(DisasContext *s, int tb_num, target_ulong eip)
static inline void gen_jcc(DisasContext *s, int b,
target_ulong val, target_ulong next_eip)
{
int l1, l2, cc_op;
int l1, l2;
cc_op = s->cc_op;
gen_update_cc_op(s);
if (s->cc_op != CC_OP_DYNAMIC) {
gen_op_set_cc_op(s->cc_op);
}
if (s->jmp_opt) {
l1 = gen_new_label();
gen_jcc1(s, cc_op, b, l1);
gen_jcc1(s, b, l1);
s->cc_op = CC_OP_DYNAMIC;
gen_goto_tb(s, 0, next_eip);
@ -2320,7 +2322,8 @@ static inline void gen_jcc(DisasContext *s, int b,
l1 = gen_new_label();
l2 = gen_new_label();
gen_jcc1(s, cc_op, b, l1);
gen_jcc1(s, b, l1);
s->cc_op = CC_OP_DYNAMIC;
gen_jmp_im(next_eip);
tcg_gen_br(l2);
@ -2343,7 +2346,7 @@ static void gen_setcc(DisasContext *s, int b)
t0 = tcg_temp_local_new();
tcg_gen_movi_tl(t0, 0);
l1 = gen_new_label();
gen_jcc1(s, s->cc_op, b ^ 1, l1);
gen_jcc1(s, b ^ 1, l1);
tcg_gen_movi_tl(t0, 1);
gen_set_label(l1);
tcg_gen_mov_tl(cpu_T[0], t0);
@ -6027,7 +6030,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
};
op1 = fcmov_cc[op & 3] | (((op >> 3) & 1) ^ 1);
l1 = gen_new_label();
gen_jcc1(s, s->cc_op, op1, l1);
gen_jcc1(s, op1, l1);
gen_helper_fmov_ST0_STN(cpu_env, tcg_const_i32(opreg));
gen_set_label(l1);
}
@ -6418,7 +6421,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
if (ot == OT_LONG) {
/* XXX: specific Intel behaviour ? */
l1 = gen_new_label();
gen_jcc1(s, s->cc_op, b ^ 1, l1);
gen_jcc1(s, b ^ 1, l1);
tcg_gen_mov_tl(cpu_regs[reg], t0);
gen_set_label(l1);
tcg_gen_ext32u_tl(cpu_regs[reg], cpu_regs[reg]);
@ -6426,7 +6429,7 @@ static target_ulong disas_insn(CPUX86State *env, DisasContext *s,
#endif
{
l1 = gen_new_label();
gen_jcc1(s, s->cc_op, b ^ 1, l1);
gen_jcc1(s, b ^ 1, l1);
gen_op_mov_reg_v(ot, reg, t0);
gen_set_label(l1);
}