mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

target-i386: xsave: Simplify CPUID[0xD,0].{EAX,EDX} calculation

Browse Source 
Instead of assigning individual bits in a loop, just copy the
values from ena_mask.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
This commit is contained in:
Eduardo Habkost 2016-09-22 14:58:32 -03:00
parent 4928cd6de6
commit 8057c621b1
1 changed files with 2 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
target-i386/cpu.c
View File

@ -2523,15 +2523,11 @@ void cpu_x86_cpuid(CPUX86State *env, uint32_t index, uint32_t count,
for (i = 2; i < ARRAY_SIZE(x86_ext_save_areas); i++) {
const ExtSaveArea *esa = &x86_ext_save_areas[i];
if ((ena_mask >> i) & 1) {
if (i < 32) {
*eax |= 1u << i;
} else {
*edx |= 1u << (i - 32);
}
*ecx = MAX(*ecx, esa->offset + esa->size);
}
}
*eax |= ena_mask & (XSTATE_FP_MASK | XSTATE_SSE_MASK);
*eax = ena_mask;
*edx = ena_mask >> 32;
*ebx = *ecx;
} else if (count == 1) {
*eax = env->features[FEAT_XSAVE];