[Bug target/22432] Wrong code generation using MMX intrinsics on amd64

[uros at kss-loka dot si]

------- Additional Comments From uros at kss-loka dot si  2005-08-17 09:54 -------
The code produced by crosscompiling from i686 for x86_86, I got functionally 
equal asm for 32bit and 64bit mode:

gcc -O2 -m64:

.LFB128:
	subq	$24, %rsp
.LCFI0:
	leaq	20(%rsp), %rax
	leaq	24(%rsp), %rdx
	cmpq	%rax, %rdx
	jbe	.L7
	movq	.LC5(%rip), %mm0
	pxor	%mm1, %mm1
	packuswb	%mm1, %mm0
	movq	%mm0, (%rsp)
	movq	(%rsp), %rax
	incl	%eax
	jne	.L4
	emms
...

gcc -m32 -mmmx:

	pushl	%ebp
	movl	%esp, %ebp
	subl	$40, %esp
	leal	-4(%ebp), %eax
	andl	$-16, %esp
	subl	$16, %esp
	cmpl	%eax, %ebp
	jbe	.L7
	movq	.LC6, %mm0
	pxor	%mm1, %mm1
	packuswb	%mm1, %mm0
	movd	%mm0, -20(%ebp)
	movl	-20(%ebp), %eax
	incl	%eax
	jne	.L4
	emms
...

Tested with gcc version 4.1.0 20050716 (experimental)

-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=22432