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[SIMD] Question

General and Gameplay Programming Programming

Started by Austrian Coder July 03, 2003 09:56 AM

8 comments, last by Austrian Coder 20 years, 9 months ago

Austrian Coder

122

Author

July 03, 2003 09:56 AM

I have here this code:


__asm {
	mov edi,d;
	mov esi,s;
	mov ecx,_size;
	shr ecx,4;
lx:
	movaps xmm0, [esi];
	lea esi,[esi+16];
	movaps [edi],xmm0;
	lea edi,[edi+16];
	dec ecx;
	jnz lx;
}

Copy _size bytes form s to d. But i get some errors. error C2400: Inline-Assembler: Syntaxerror at 'Opcode'; 'xmm0' found (movaps xmm0, [esi]

error C2400: Inline-Assembler: Syntaxfehler in 'Opcode'; '[' found (movaps [edi],xmm0

I am using VC++ 6.0 SP5 + Processor Pack What i am making wrong? Thanks, Christian

sross

109

July 03, 2003 11:33 AM

have you included xmmintrin.h in your file? (this is requiered for SSE support)

Stéphane RossGame Gurus Entertainment

Austrian Coder

122

Author

July 03, 2003 12:33 PM

Now i get these errors:

C:\Programme\Microsoft Visual Studio\VC98\INCLUDE\mmintrin.h(29): error C2146: Syntax error: Missing '';'' before designators '' _ m_from_int''
C:\Programme\Microsoft Visual Studio\VC98\INCLUDE\mmintrin.h(29) m_from_int: error C2501: '' __m64 '': Missing storage class or type designator
C:\Programme\Microsoft Visual Studio\VC98\INCLUDE\mmintrin.h(29): fatal error C1004: Unexpected file end found

(Translated form german to englisch via altavista)

sross

109

July 03, 2003 03:52 PM

you included mmintrin.h? this is for mmx support i think... theres a difference between xmmintrin and mmintrin

Stéphane RossGame Gurus Entertainment

Anonymous

July 03, 2003 04:02 PM

no you don´t need xmmintrin.h that´s for the intrinsics functions not inline assembler. is d and s pointers?

Austrian Coder

122

Author

July 03, 2003 05:57 PM

void SSE_16bytes_CopyMem(unsigned char* d, unsigned char* s, int _size)
{
__asm {
mov edi,d;
mov esi,s;
mov ecx,_size;
shr ecx,4;
lx:
movaps xmm0, [esi];
lea esi,[esi+16];
movaps [edi],xmm0;
lea edi,[edi+16];
dec ecx;
jnz lx;
}
}

Anonymous

July 04, 2003 12:38 AM

that will compile just fine for me, are you sure you have processor pack installed?

Austrian Coder

122

Author

July 04, 2003 04:01 AM

Yes i have installed the processor pack. I have reisntalled it now, but the same erros.
Should I use the beta version of the processor pack? Must i create an win32 app, not console, to use SSE?

Anonymous

July 04, 2003 07:57 AM

no it should work with console, I have vs6sp5 and vcpp5 installed

Charles B

863

July 04, 2003 06:32 PM

forgive me if I am wrong, and it won''t solve your problem but why use lea instead of simply add ?

I wonder if two consecutive address taking on esi and edi wont slow the code.

"Coding math tricks in asm is more fun than Java"

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