Attachment 22697 Details for Bug 16549 – First try at fixing DRM_CAS on Alpha

[patch] First try at fixing DRM_CAS on Alpha

fix-DRM_CAS.patch (text/plain), 1.43 KB, created by Matt Turner on 2009-02-08 18:02:19 UTC

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Creator: Matt Turner

Created: 2009-02-08 18:02:19 UTC

Size: 1.43 KB

patch

obsolete

>diff --git a/libdrm/xf86drm.h b/libdrm/xf86drm.h
>index f9dd1bf..6226be1 100644
>--- a/libdrm/xf86drm.h
>+++ b/libdrm/xf86drm.h
>@@ -325,29 +325,26 @@ typedef struct _drmSetVersion {
> 
> #elif defined(__alpha__)
> 
>-#define	DRM_CAS(lock, old, new, ret) 		\
>- 	do {					\
>- 		int old32;                      \
>- 		int cur32;			\
>- 		__asm__ __volatile__(		\
>- 		"       mb\n"			\
>- 		"       zap   %4, 0xF0, %0\n"   \
>- 		"       ldl_l %1, %2\n"		\
>- 		"       zap   %1, 0xF0, %1\n"   \
>-                "       cmpeq %0, %1, %1\n"	\
>-                "       beq   %1, 1f\n"		\
>- 		"       bis   %5, %5, %1\n"	\
>-                "       stl_c %1, %2\n"		\
>-                "1:     xor   %1, 1, %1\n"	\
>-                "       stl   %1, %3"		\
>-                : "=r" (old32),                 \
>-		  "=&r" (cur32),		\
>-                   "=m" (__drm_dummy_lock(lock)),\
>-                   "=m" (ret)			\
>- 		: "r" (old),			\
>- 		  "r" (new));			\
>- 	} while(0)
>-
>+#define DRM_CAS(lock, old, new, ret)		\
>+	do {					\
>+		int current;			\
>+		__asm__ __volatile__(		\
>+			"mb\n\t"		\
>+			"mov	$31, %0\n\t"	\
>+			"ldl_l	%1, %2\n\t"	\
>+			"cmpeq	%1, %4, %1\n\t"	\
>+			"beq	%1, 1f\n\t"	\
>+			"stl_c	%3, %2\n\t"	\
>+			"addq	%0, 1, %0\n\t"	\
>+			"1:"			\
>+			: "=&r" (ret),		\
>+			  "=&r" (current),	\
>+			  "=m" (__drm_dummy_lock(lock))	\
>+			: "r" (new),		\
>+			  "r" (old)		\
>+		);				\
>+	} while (0)
>+	
> #elif defined(__sparc__)
> 
> #define DRM_CAS(lock,old,new,__ret)				\

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Attachments on bug 16549: 17433 | 17434 | 17435 | 17447 | 17448 | 17449 | 17450 | 22217 | 22218 | 22419 | 22420 | 22506 | 22697 | 22898

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