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Date: Thu, 30 Aug 2012 01:30:14 +0200
From: Mathias Krause <minipli@...glemail.com>
To: Avi Kivity <avi@...hat.com>, Marcelo Tosatti <mtosatti@...hat.com>
Cc: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
Mathias Krause <minipli@...glemail.com>
Subject: [PATCH 2/8] KVM: x86 emulator: use aligned variants of SSE register ops
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@...glemail.com>
---
arch/x86/kvm/emulate.c | 64 ++++++++++++++++++++++++------------------------
1 file changed, 32 insertions(+), 32 deletions(-)
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index 1451cff..5a0fee1 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -909,23 +909,23 @@ static void read_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data, int reg)
{
ctxt->ops->get_fpu(ctxt);
switch (reg) {
- case 0: asm("movdqu %%xmm0, %0" : "=m"(*data)); break;
- case 1: asm("movdqu %%xmm1, %0" : "=m"(*data)); break;
- case 2: asm("movdqu %%xmm2, %0" : "=m"(*data)); break;
- case 3: asm("movdqu %%xmm3, %0" : "=m"(*data)); break;
- case 4: asm("movdqu %%xmm4, %0" : "=m"(*data)); break;
- case 5: asm("movdqu %%xmm5, %0" : "=m"(*data)); break;
- case 6: asm("movdqu %%xmm6, %0" : "=m"(*data)); break;
- case 7: asm("movdqu %%xmm7, %0" : "=m"(*data)); break;
+ case 0: asm("movdqa %%xmm0, %0" : "=m"(*data)); break;
+ case 1: asm("movdqa %%xmm1, %0" : "=m"(*data)); break;
+ case 2: asm("movdqa %%xmm2, %0" : "=m"(*data)); break;
+ case 3: asm("movdqa %%xmm3, %0" : "=m"(*data)); break;
+ case 4: asm("movdqa %%xmm4, %0" : "=m"(*data)); break;
+ case 5: asm("movdqa %%xmm5, %0" : "=m"(*data)); break;
+ case 6: asm("movdqa %%xmm6, %0" : "=m"(*data)); break;
+ case 7: asm("movdqa %%xmm7, %0" : "=m"(*data)); break;
#ifdef CONFIG_X86_64
- case 8: asm("movdqu %%xmm8, %0" : "=m"(*data)); break;
- case 9: asm("movdqu %%xmm9, %0" : "=m"(*data)); break;
- case 10: asm("movdqu %%xmm10, %0" : "=m"(*data)); break;
- case 11: asm("movdqu %%xmm11, %0" : "=m"(*data)); break;
- case 12: asm("movdqu %%xmm12, %0" : "=m"(*data)); break;
- case 13: asm("movdqu %%xmm13, %0" : "=m"(*data)); break;
- case 14: asm("movdqu %%xmm14, %0" : "=m"(*data)); break;
- case 15: asm("movdqu %%xmm15, %0" : "=m"(*data)); break;
+ case 8: asm("movdqa %%xmm8, %0" : "=m"(*data)); break;
+ case 9: asm("movdqa %%xmm9, %0" : "=m"(*data)); break;
+ case 10: asm("movdqa %%xmm10, %0" : "=m"(*data)); break;
+ case 11: asm("movdqa %%xmm11, %0" : "=m"(*data)); break;
+ case 12: asm("movdqa %%xmm12, %0" : "=m"(*data)); break;
+ case 13: asm("movdqa %%xmm13, %0" : "=m"(*data)); break;
+ case 14: asm("movdqa %%xmm14, %0" : "=m"(*data)); break;
+ case 15: asm("movdqa %%xmm15, %0" : "=m"(*data)); break;
#endif
default: BUG();
}
@@ -937,23 +937,23 @@ static void write_sse_reg(struct x86_emulate_ctxt *ctxt, sse128_t *data,
{
ctxt->ops->get_fpu(ctxt);
switch (reg) {
- case 0: asm("movdqu %0, %%xmm0" : : "m"(*data)); break;
- case 1: asm("movdqu %0, %%xmm1" : : "m"(*data)); break;
- case 2: asm("movdqu %0, %%xmm2" : : "m"(*data)); break;
- case 3: asm("movdqu %0, %%xmm3" : : "m"(*data)); break;
- case 4: asm("movdqu %0, %%xmm4" : : "m"(*data)); break;
- case 5: asm("movdqu %0, %%xmm5" : : "m"(*data)); break;
- case 6: asm("movdqu %0, %%xmm6" : : "m"(*data)); break;
- case 7: asm("movdqu %0, %%xmm7" : : "m"(*data)); break;
+ case 0: asm("movdqa %0, %%xmm0" : : "m"(*data)); break;
+ case 1: asm("movdqa %0, %%xmm1" : : "m"(*data)); break;
+ case 2: asm("movdqa %0, %%xmm2" : : "m"(*data)); break;
+ case 3: asm("movdqa %0, %%xmm3" : : "m"(*data)); break;
+ case 4: asm("movdqa %0, %%xmm4" : : "m"(*data)); break;
+ case 5: asm("movdqa %0, %%xmm5" : : "m"(*data)); break;
+ case 6: asm("movdqa %0, %%xmm6" : : "m"(*data)); break;
+ case 7: asm("movdqa %0, %%xmm7" : : "m"(*data)); break;
#ifdef CONFIG_X86_64
- case 8: asm("movdqu %0, %%xmm8" : : "m"(*data)); break;
- case 9: asm("movdqu %0, %%xmm9" : : "m"(*data)); break;
- case 10: asm("movdqu %0, %%xmm10" : : "m"(*data)); break;
- case 11: asm("movdqu %0, %%xmm11" : : "m"(*data)); break;
- case 12: asm("movdqu %0, %%xmm12" : : "m"(*data)); break;
- case 13: asm("movdqu %0, %%xmm13" : : "m"(*data)); break;
- case 14: asm("movdqu %0, %%xmm14" : : "m"(*data)); break;
- case 15: asm("movdqu %0, %%xmm15" : : "m"(*data)); break;
+ case 8: asm("movdqa %0, %%xmm8" : : "m"(*data)); break;
+ case 9: asm("movdqa %0, %%xmm9" : : "m"(*data)); break;
+ case 10: asm("movdqa %0, %%xmm10" : : "m"(*data)); break;
+ case 11: asm("movdqa %0, %%xmm11" : : "m"(*data)); break;
+ case 12: asm("movdqa %0, %%xmm12" : : "m"(*data)); break;
+ case 13: asm("movdqa %0, %%xmm13" : : "m"(*data)); break;
+ case 14: asm("movdqa %0, %%xmm14" : : "m"(*data)); break;
+ case 15: asm("movdqa %0, %%xmm15" : : "m"(*data)); break;
#endif
default: BUG();
}
--
1.7.10.4
--
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