pshufb
in [ASM]
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From: mike7411 on 16 Nov 2006 13:32 I noticed that the following doesn't compile in NASM: pshufb xmm0, xmm1 It says: error: parser: instruction expected However, this does work: pshufd xmm0, xmm1, 99 Any ideas why pshufd works but not pshufb?
From: SpooK on 16 Nov 2006 15:37 On Nov 16, 10:32 am, mike7...(a)gmail.com wrote: > I noticed that the following doesn't compile in NASM: > > pshufb xmm0, xmm1 > > It says: > > error: parser: instruction expected > > However, this does work: > > pshufd xmm0, xmm1, 99 > > Any ideas why pshufd works but not pshufb? PSHUFD is apart of SSE2, covered by NASM. PSHUFB came out with SSSE3, so I have doubts that NASM has been modified to handle such "new" instructions... yet. You may wish to look at YASM, I believe that project is much more active and may have that instruction covered. YASM is a spin-off of NASM, so your source should assemble with it.
From: Phil Carmody on 16 Nov 2006 15:42 mike7411(a)gmail.com writes: > I noticed that the following doesn't compile in NASM: > > pshufb xmm0, xmm1 > > It says: > > error: parser: instruction expected > > However, this does work: > > pshufd xmm0, xmm1, 99 > > Any ideas why pshufd works but not pshufb? Is it because the pshufd instruction is supported, and the pshufb instruction isn't supported, being as they are from different generations of the godforsaken x86 instruction set? Just a guess. Phil -- "Home taping is killing big business profits. We left this side blank so you can help." -- Dead Kennedys, written upon the B-side of tapes of /In God We Trust, Inc./.
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