From 4109b9ea8ada91894dd561594dc5f2db83ebacf3 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Wed, 11 Nov 2020 17:36:39 -0800 Subject: [PATCH] softfloat: Rearrange FloatParts64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Shuffle the fraction to the end, otherwise sort by size. Add frac_hi and frac_lo members to alias frac. Reviewed-by: Alex Bennée Signed-off-by: Richard Henderson --- fpu/softfloat.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 2123453d40..ee609540aa 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -511,10 +511,20 @@ static inline __attribute__((unused)) bool is_qnan(FloatClass c) */ typedef struct { - uint64_t frac; - int32_t exp; FloatClass cls; bool sign; + int32_t exp; + union { + /* Routines that know the structure may reference the singular name. */ + uint64_t frac; + /* + * Routines expanded with multiple structures reference "hi" and "lo" + * depending on the operation. In FloatParts64, "hi" and "lo" are + * both the same word and aliased here. + */ + uint64_t frac_hi; + uint64_t frac_lo; + }; } FloatParts64; #define DECOMPOSED_BINARY_POINT 63