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KVM: x86 emulator: use aligned variants of SSE register ops

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As the the compiler ensures that the memory operand is always aligned
to a 16 byte memory location, use the aligned variant of MOVDQ for
read_sse_reg() and write_sse_reg().

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Mathias Krause 2012-08-30 01:30:14 +02:00 committed by Avi Kivity
parent 326d07cb30
commit 89a87c6779
1 changed files with 32 additions and 32 deletions
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64
arch/x86/kvm/emulate.c
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@ -909,23 +909,23 @@ static void read_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data, int reg)
{ {
ctxt->ops->get_fpu(ctxt); ctxt->ops->get_fpu(ctxt);
switch (reg) { switch (reg) {
case 0: asm("movdqu %%xmm0, %0" : "=m"(*data)); break; case 0: asm("movdqa %%xmm0, %0" : "=m"(*data)); break;
case 1: asm("movdqu %%xmm1, %0" : "=m"(*data)); break; case 1: asm("movdqa %%xmm1, %0" : "=m"(*data)); break;
case 2: asm("movdqu %%xmm2, %0" : "=m"(*data)); break; case 2: asm("movdqa %%xmm2, %0" : "=m"(*data)); break;
case 3: asm("movdqu %%xmm3, %0" : "=m"(*data)); break; case 3: asm("movdqa %%xmm3, %0" : "=m"(*data)); break;
case 4: asm("movdqu %%xmm4, %0" : "=m"(*data)); break; case 4: asm("movdqa %%xmm4, %0" : "=m"(*data)); break;
case 5: asm("movdqu %%xmm5, %0" : "=m"(*data)); break; case 5: asm("movdqa %%xmm5, %0" : "=m"(*data)); break;
case 6: asm("movdqu %%xmm6, %0" : "=m"(*data)); break; case 6: asm("movdqa %%xmm6, %0" : "=m"(*data)); break;
case 7: asm("movdqu %%xmm7, %0" : "=m"(*data)); break; case 7: asm("movdqa %%xmm7, %0" : "=m"(*data)); break;
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64
case 8: asm("movdqu %%xmm8, %0" : "=m"(*data)); break; case 8: asm("movdqa %%xmm8, %0" : "=m"(*data)); break;
case 9: asm("movdqu %%xmm9, %0" : "=m"(*data)); break; case 9: asm("movdqa %%xmm9, %0" : "=m"(*data)); break;
case 10: asm("movdqu %%xmm10, %0" : "=m"(*data)); break; case 10: asm("movdqa %%xmm10, %0" : "=m"(*data)); break;
case 11: asm("movdqu %%xmm11, %0" : "=m"(*data)); break; case 11: asm("movdqa %%xmm11, %0" : "=m"(*data)); break;
case 12: asm("movdqu %%xmm12, %0" : "=m"(*data)); break; case 12: asm("movdqa %%xmm12, %0" : "=m"(*data)); break;
case 13: asm("movdqu %%xmm13, %0" : "=m"(*data)); break; case 13: asm("movdqa %%xmm13, %0" : "=m"(*data)); break;
case 14: asm("movdqu %%xmm14, %0" : "=m"(*data)); break; case 14: asm("movdqa %%xmm14, %0" : "=m"(*data)); break;
case 15: asm("movdqu %%xmm15, %0" : "=m"(*data)); break; case 15: asm("movdqa %%xmm15, %0" : "=m"(*data)); break;
#endif #endif
default: BUG(); default: BUG();
} }
@ -937,23 +937,23 @@ static void write_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data,
{ {
ctxt->ops->get_fpu(ctxt); ctxt->ops->get_fpu(ctxt);
switch (reg) { switch (reg) {
case 0: asm("movdqu %0, %%xmm0" : : "m"(*data)); break; case 0: asm("movdqa %0, %%xmm0" : : "m"(*data)); break;
case 1: asm("movdqu %0, %%xmm1" : : "m"(*data)); break; case 1: asm("movdqa %0, %%xmm1" : : "m"(*data)); break;
case 2: asm("movdqu %0, %%xmm2" : : "m"(*data)); break; case 2: asm("movdqa %0, %%xmm2" : : "m"(*data)); break;
case 3: asm("movdqu %0, %%xmm3" : : "m"(*data)); break; case 3: asm("movdqa %0, %%xmm3" : : "m"(*data)); break;
case 4: asm("movdqu %0, %%xmm4" : : "m"(*data)); break; case 4: asm("movdqa %0, %%xmm4" : : "m"(*data)); break;
case 5: asm("movdqu %0, %%xmm5" : : "m"(*data)); break; case 5: asm("movdqa %0, %%xmm5" : : "m"(*data)); break;
case 6: asm("movdqu %0, %%xmm6" : : "m"(*data)); break; case 6: asm("movdqa %0, %%xmm6" : : "m"(*data)); break;
case 7: asm("movdqu %0, %%xmm7" : : "m"(*data)); break; case 7: asm("movdqa %0, %%xmm7" : : "m"(*data)); break;
#ifdef CONFIG_X86_64 #ifdef CONFIG_X86_64
case 8: asm("movdqu %0, %%xmm8" : : "m"(*data)); break; case 8: asm("movdqa %0, %%xmm8" : : "m"(*data)); break;
case 9: asm("movdqu %0, %%xmm9" : : "m"(*data)); break; case 9: asm("movdqa %0, %%xmm9" : : "m"(*data)); break;
case 10: asm("movdqu %0, %%xmm10" : : "m"(*data)); break; case 10: asm("movdqa %0, %%xmm10" : : "m"(*data)); break;
case 11: asm("movdqu %0, %%xmm11" : : "m"(*data)); break; case 11: asm("movdqa %0, %%xmm11" : : "m"(*data)); break;
case 12: asm("movdqu %0, %%xmm12" : : "m"(*data)); break; case 12: asm("movdqa %0, %%xmm12" : : "m"(*data)); break;
case 13: asm("movdqu %0, %%xmm13" : : "m"(*data)); break; case 13: asm("movdqa %0, %%xmm13" : : "m"(*data)); break;
case 14: asm("movdqu %0, %%xmm14" : : "m"(*data)); break; case 14: asm("movdqa %0, %%xmm14" : : "m"(*data)); break;
case 15: asm("movdqu %0, %%xmm15" : : "m"(*data)); break; case 15: asm("movdqa %0, %%xmm15" : : "m"(*data)); break;
#endif #endif
default: BUG(); default: BUG();
} }