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target/i386: Move 3DNOW decoder 

Handle 3DNOW instructions early to avoid complicating the MMX/SSE logic.

Signed-off-by: Paul Brook <paul@nowt.org>
Message-Id: <20220424220204.2493824-25-paul@nowt.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paul Brook 2022-04-24 23:01:46 +01:00 committed by Paolo Bonzini
parent 491f0f1962
commit 622ef8f291
1 changed files with 17 additions and 13 deletions
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30
target/i386/tcg/translate.c
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@ -3216,6 +3216,11 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
is_xmm = 1;
}
}
if (sse_op_flags & SSE_OPF_3DNOW) {
if (!(s->cpuid_ext2_features & CPUID_EXT2_3DNOW)) {
goto illegal_op;
}
}
/* simple MMX/SSE operation */
if (s->flags & HF_TS_MASK) {
gen_exception(s, EXCP07_PREX, pc_start - s->cs_base);
@ -4567,21 +4572,20 @@ static void gen_sse(CPUX86State *env, DisasContext *s, int b,
rm = (modrm & 7);
op2_offset = offsetof(CPUX86State,fpregs[rm].mmx);
}
if (sse_op_flags & SSE_OPF_3DNOW) {
/* 3DNow! data insns */
val = x86_ldub_code(env, s);
SSEFunc_0_epp op_3dnow = sse_op_table5[val];
if (!op_3dnow) {
goto unknown_op;
}
tcg_gen_addi_ptr(s->ptr0, cpu_env, op1_offset);
tcg_gen_addi_ptr(s->ptr1, cpu_env, op2_offset);
op_3dnow(cpu_env, s->ptr0, s->ptr1);
return;
}
}
switch(b) {
case 0x0f: /* 3DNow! data insns */
val = x86_ldub_code(env, s);
sse_fn_epp = sse_op_table5[val];
if (!sse_fn_epp) {
goto unknown_op;
}
if (!(s->cpuid_ext2_features & CPUID_EXT2_3DNOW)) {
goto illegal_op;
}
tcg_gen_addi_ptr(s->ptr0, cpu_env, op1_offset);
tcg_gen_addi_ptr(s->ptr1, cpu_env, op2_offset);
sse_fn_epp(cpu_env, s->ptr0, s->ptr1);
break;
case 0x70: /* pshufx insn */
case 0xc6: /* pshufx insn */
val = x86_ldub_code(env, s);