From 37c954a1b96a65d836705a6e530eeab58cc9d964 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Sat, 14 Nov 2020 14:48:31 -0800 Subject: [PATCH] softfloat: Move uint_to_float to softfloat-parts.c.inc MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Rename to parts$N_uint_to_float. Reimplement uint64_to_float128 with FloatParts128. Reviewed-by: Alex Bennée Reviewed-by: David Hildenbrand Signed-off-by: Richard Henderson --- fpu/softfloat-parts.c.inc | 23 +++++++++++ fpu/softfloat.c | 83 ++++++++++++++++----------------------- 2 files changed, 56 insertions(+), 50 deletions(-) diff --git a/fpu/softfloat-parts.c.inc b/fpu/softfloat-parts.c.inc index b7486f02db..2eb7bb96b3 100644 --- a/fpu/softfloat-parts.c.inc +++ b/fpu/softfloat-parts.c.inc @@ -915,3 +915,26 @@ static void partsN(sint_to_float)(FloatPartsN *p, int64_t a, p->exp = DECOMPOSED_BINARY_POINT - shift + scale; p->frac_hi = f << shift; } + +/* + * Unsigned Integer to float conversions + * + * Returns the result of converting the unsigned integer `a' to the + * floating-point format. The conversion is performed according to the + * IEC/IEEE Standard for Binary Floating-Point Arithmetic. + */ +static void partsN(uint_to_float)(FloatPartsN *p, uint64_t a, + int scale, float_status *status) +{ + memset(p, 0, sizeof(*p)); + + if (a == 0) { + p->cls = float_class_zero; + } else { + int shift = clz64(a); + scale = MIN(MAX(scale, -0x10000), 0x10000); + p->cls = float_class_normal; + p->exp = DECOMPOSED_BINARY_POINT - shift + scale; + p->frac_hi = a << shift; + } +} diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 6404a2997f..db14bd09aa 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -857,6 +857,14 @@ static void parts128_sint_to_float(FloatParts128 *p, int64_t a, #define parts_sint_to_float(P, I, Z, S) \ PARTS_GENERIC_64_128(sint_to_float, P)(P, I, Z, S) +static void parts64_uint_to_float(FloatParts64 *p, uint64_t a, + int scale, float_status *s); +static void parts128_uint_to_float(FloatParts128 *p, uint64_t a, + int scale, float_status *s); + +#define parts_uint_to_float(P, I, Z, S) \ + PARTS_GENERIC_64_128(uint_to_float, P)(P, I, Z, S) + /* * Helper functions for softfloat-parts.c.inc, per-size operations. */ @@ -3102,35 +3110,15 @@ float128 int32_to_float128(int32_t a, float_status *status) } /* - * Unsigned Integer to float conversions - * - * Returns the result of converting the unsigned integer `a' to the - * floating-point format. The conversion is performed according to the - * IEC/IEEE Standard for Binary Floating-Point Arithmetic. + * Unsigned Integer to floating-point conversions */ -static FloatParts64 uint_to_float(uint64_t a, int scale, float_status *status) -{ - FloatParts64 r = { .sign = false }; - int shift; - - if (a == 0) { - r.cls = float_class_zero; - } else { - scale = MIN(MAX(scale, -0x10000), 0x10000); - shift = clz64(a); - r.cls = float_class_normal; - r.exp = DECOMPOSED_BINARY_POINT - shift + scale; - r.frac = a << shift; - } - - return r; -} - float16 uint64_to_float16_scalbn(uint64_t a, int scale, float_status *status) { - FloatParts64 pa = uint_to_float(a, scale, status); - return float16_round_pack_canonical(&pa, status); + FloatParts64 p; + + parts_uint_to_float(&p, a, scale, status); + return float16_round_pack_canonical(&p, status); } float16 uint32_to_float16_scalbn(uint32_t a, int scale, float_status *status) @@ -3165,8 +3153,10 @@ float16 uint8_to_float16(uint8_t a, float_status *status) float32 uint64_to_float32_scalbn(uint64_t a, int scale, float_status *status) { - FloatParts64 pa = uint_to_float(a, scale, status); - return float32_round_pack_canonical(&pa, status); + FloatParts64 p; + + parts_uint_to_float(&p, a, scale, status); + return float32_round_pack_canonical(&p, status); } float32 uint32_to_float32_scalbn(uint32_t a, int scale, float_status *status) @@ -3196,8 +3186,10 @@ float32 uint16_to_float32(uint16_t a, float_status *status) float64 uint64_to_float64_scalbn(uint64_t a, int scale, float_status *status) { - FloatParts64 pa = uint_to_float(a, scale, status); - return float64_round_pack_canonical(&pa, status); + FloatParts64 p; + + parts_uint_to_float(&p, a, scale, status); + return float64_round_pack_canonical(&p, status); } float64 uint32_to_float64_scalbn(uint32_t a, int scale, float_status *status) @@ -3225,15 +3217,12 @@ float64 uint16_to_float64(uint16_t a, float_status *status) return uint64_to_float64_scalbn(a, 0, status); } -/* - * Returns the result of converting the unsigned integer `a' to the - * bfloat16 format. - */ - bfloat16 uint64_to_bfloat16_scalbn(uint64_t a, int scale, float_status *status) { - FloatParts64 pa = uint_to_float(a, scale, status); - return bfloat16_round_pack_canonical(&pa, status); + FloatParts64 p; + + parts_uint_to_float(&p, a, scale, status); + return bfloat16_round_pack_canonical(&p, status); } bfloat16 uint32_to_bfloat16_scalbn(uint32_t a, int scale, float_status *status) @@ -3261,6 +3250,14 @@ bfloat16 uint16_to_bfloat16(uint16_t a, float_status *status) return uint64_to_bfloat16_scalbn(a, 0, status); } +float128 uint64_to_float128(uint64_t a, float_status *status) +{ + FloatParts128 p; + + parts_uint_to_float(&p, a, 0, status); + return float128_round_pack_canonical(&p, status); +} + /* Float Min/Max */ /* min() and max() functions. These can't be implemented as * 'compare and pick one input' because that would mishandle @@ -4972,20 +4969,6 @@ floatx80 int64_to_floatx80(int64_t a, float_status *status) } -/*---------------------------------------------------------------------------- -| Returns the result of converting the 64-bit unsigned integer `a' -| to the quadruple-precision floating-point format. The conversion is performed -| according to the IEC/IEEE Standard for Binary Floating-Point Arithmetic. -*----------------------------------------------------------------------------*/ - -float128 uint64_to_float128(uint64_t a, float_status *status) -{ - if (a == 0) { - return float128_zero; - } - return normalizeRoundAndPackFloat128(0, 0x406E, 0, a, status); -} - /*---------------------------------------------------------------------------- | Returns the result of converting the single-precision floating-point value | `a' to the extended double-precision floating-point format. The conversion