From: James Hogan <james.hogan@xxxxxxxxxx>
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 <james.hogan@xxxxxxxxxx>
Signed-off-by: Paul Burton <paul.burton@xxxxxxxxxx>
---
Changes in v2:
- Rebase atop v3.19-rc6.
---
arch/mips/include/asm/processor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/include/asm/processor.h b/arch/mips/include/asm/processor.h
index 9daa386..9162aa2 100644
--- a/arch/mips/include/asm/processor.h
+++ b/arch/mips/include/asm/processor.h
@@ -111,7 +111,7 @@ 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) \
--
2.2.2
