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effectiveness
2012 Jan 04
1
[LLVMdev] How can I compile a c source file to use SSE2 Data Movement Instructions?
...Y(%eax), %xmm0
movapd _X(%eax), %xmm1
mulpd %xmm2, %xmm1
subpd %xmm1, %xmm0
movapd %xmm0, _Y(%eax)
addl $16, %eax
cmpl $800, %eax
jne L2
xorw %ax, %ax
leave
ret
.globl _DA
.data
.align 16
_DA:
.long 858993459
.long 1070805811
.comm _X, 800, 5
.comm _Y, 800, 5
It seems gcc emit more effectivenss instuction. Are there any clang command
arguments to get the similar result?
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