From: James Hogan Date: Fri, 30 Jan 2015 12:09:39 +0000 (+0000) Subject: MIPS: MSA: Fix big-endian FPR_IDX implementation X-Git-Tag: v5.15~15948^2~1^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1f3a2c6e229ccb8df8115b04d16ad4832767cf3a;p=platform%2Fkernel%2Flinux-starfive.git MIPS: MSA: Fix big-endian FPR_IDX implementation The maximum word size is 64-bits since MSA state is saved using st.d which stores two 64-bit words, therefore reimplement FPR_IDX using xor, and only within each 64-bit word. Signed-off-by: James Hogan Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/9169/ Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h index b5dcbee0..9b3b48e 100644 --- a/arch/mips/include/asm/processor.h +++ b/arch/mips/include/asm/processor.h @@ -105,7 +105,7 @@ union fpureg { #ifdef CONFIG_CPU_LITTLE_ENDIAN # define FPR_IDX(width, idx) (idx) #else -# define FPR_IDX(width, idx) ((FPU_REG_WIDTH / (width)) - 1 - (idx)) +# define FPR_IDX(width, idx) ((idx) ^ ((64 / (width)) - 1)) #endif #define BUILD_FPR_ACCESS(width) \