diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2023-10-10 10:31:39 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2023-12-29 22:04:40 +0100 |
| commit | 405c7c07082b4f9d11500659c849657297f0d065 (patch) | |
| tree | ad8a1dcdff080c7304af65810fce5531ece8664b /target/i386/tcg/translate.c | |
| parent | e7bbb7cb71b3001c54f23c66848d84e694c47243 (diff) | |
target/i386: implement CMPccXADD
The main difficulty here is that a page fault when writing to the destination
must not overwrite the flags. Therefore, the flags computation must be
inlined instead of using gen_jcc1*.
For simplicity, I am using an unconditional cmpxchg operation, that becomes
a NOP if the comparison fails.
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/tcg/translate.c')
| -rw-r--r-- | target/i386/tcg/translate.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index fe82d42157..e1eb82a5c6 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -122,6 +122,7 @@ typedef struct DisasContext { int cpuid_ext3_features; int cpuid_7_0_ebx_features; int cpuid_7_0_ecx_features; + int cpuid_7_1_eax_features; int cpuid_xsave_features; /* TCG local temps */ @@ -6963,6 +6964,7 @@ static void i386_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cpu) dc->cpuid_ext3_features = env->features[FEAT_8000_0001_ECX]; dc->cpuid_7_0_ebx_features = env->features[FEAT_7_0_EBX]; dc->cpuid_7_0_ecx_features = env->features[FEAT_7_0_ECX]; + dc->cpuid_7_1_eax_features = env->features[FEAT_7_1_EAX]; dc->cpuid_xsave_features = env->features[FEAT_XSAVE]; dc->jmp_opt = !((cflags & CF_NO_GOTO_TB) || (flags & (HF_TF_MASK | HF_INHIBIT_IRQ_MASK))); |