[MPlayer-users] [PATCH] Seg fault in YSCALEYUV2YV12X called from yuv2yuvX doing vertical rescaling

[Michael Niedermayer]

Hi

On Friday 24 May 2002 23:01, Arpi wrote:
[...]
> hmm. could you make a small test program to detect this kind of gcc bug?
difficult, i dont have 2.95.2 installed
but i attached something, dunno if it works

> we could include it in ./configure to check if the gcc is working or not.
> i'm planning to disallow 2.95.2, just like 2.97-1, but it seems there is
> 2.95.3 version with the bugs of 2.95.2 ?
>
> > anyway i attached a patch, this will slow things down a tiny bit and
>
> tiny? how much?
less than 0.1% i guess

Michael
[...]

Michael
-------------- next part --------------
volatile int out=1;
volatile int a=2;
volatile int b=4;
volatile int c=8;
volatile int d=16;

int main(){
	int err=0;
	asm volatile(
		"xorl %%eax, %%eax	\n\t"
		"xorl %%esi, %%esi	\n\t"
		"xorl %%edx, %%edx	\n\t"
		"addl %1, %0		\n\t"
		"addl %2, %0		\n\t"
		"addl %3, %0		\n\t"
		"addl %4, %0		\n\t"
		:"+r" (out) 
		: "m" (a), "r" (b), "r" (c), "m" (d)
		: "%eax", "%edx", "%esi"
 	);
	
	if(out==31){
		printf("test1: ok\n");
	}else{
		printf("test1: fail %d\n", 31-out);
		err++;
	}
	return err;
}