[PATCH 03/39] powerpc: Fix offset of FPRs in VSX registers in little endian builds
From: Anton Blanchard <hidden>
Date: 2013-09-23 02:04:37
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
The FPRs overlap the high doublewords of the first 32 VSX registers. Fix TS_FPROFFSET and TS_VSRLOWOFFSET so we access the correct fields in little endian mode. If VSX is disabled the FPRs are only one doubleword in length so TS_FPROFFSET needs adjusting in little endian. Signed-off-by: Anton Blanchard <redacted> --- arch/powerpc/include/asm/processor.h | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index e378ccc..634e2b2 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h@@ -14,8 +14,18 @@ #ifdef CONFIG_VSX #define TS_FPRWIDTH 2 + +#ifdef __BIG_ENDIAN__ +#define TS_FPROFFSET 0 +#define TS_VSRLOWOFFSET 1 +#else +#define TS_FPROFFSET 1 +#define TS_VSRLOWOFFSET 0 +#endif + #else #define TS_FPRWIDTH 1 +#define TS_FPROFFSET 0 #endif #ifdef CONFIG_PPC64
@@ -142,8 +152,6 @@ typedef struct { unsigned long seg; } mm_segment_t; -#define TS_FPROFFSET 0 -#define TS_VSRLOWOFFSET 1 #define TS_FPR(i) fpr[i][TS_FPROFFSET] #define TS_TRANS_FPR(i) transact_fpr[i][TS_FPROFFSET]
--
1.8.1.2