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[PULL 27/46] softfloat: Convert float128_default_nan to parts
From: |
Richard Henderson |
Subject: |
[PULL 27/46] softfloat: Convert float128_default_nan to parts |
Date: |
Sun, 16 May 2021 07:34:12 -0500 |
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
fpu/softfloat.c | 17 ++++-------------
fpu/softfloat-specialize.c.inc | 19 +++++++++++++++++++
2 files changed, 23 insertions(+), 13 deletions(-)
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index f8f4ef51e8..08fd812ea0 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -706,7 +706,7 @@ static float128 float128_pack_raw(const FloatParts128 *p)
#define PARTS_GENERIC_64_128(NAME, P) \
QEMU_GENERIC(P, (FloatParts128 *, parts128_##NAME), parts64_##NAME)
-#define parts_default_nan parts64_default_nan
+#define parts_default_nan(P, S) PARTS_GENERIC_64_128(default_nan, P)(P, S)
#define parts_silence_nan(P, S) PARTS_GENERIC_64_128(silence_nan, P)(P, S)
@@ -3837,20 +3837,11 @@ float64 float64_default_nan(float_status *status)
float128 float128_default_nan(float_status *status)
{
- FloatParts64 p;
- float128 r;
+ FloatParts128 p;
parts_default_nan(&p, status);
- /* Extrapolate from the choices made by parts_default_nan to fill
- * in the quad-floating format. If the low bit is set, assume we
- * want to set all non-snan bits.
- */
- r.low = -(p.frac & 1);
- r.high = p.frac >> (DECOMPOSED_BINARY_POINT - 48);
- r.high |= UINT64_C(0x7FFF000000000000);
- r.high |= (uint64_t)p.sign << 63;
-
- return r;
+ frac_shr(&p, float128_params.frac_shift);
+ return float128_pack_raw(&p);
}
bfloat16 bfloat16_default_nan(float_status *status)
diff --git a/fpu/softfloat-specialize.c.inc b/fpu/softfloat-specialize.c.inc
index 5b85b843c2..c895733e79 100644
--- a/fpu/softfloat-specialize.c.inc
+++ b/fpu/softfloat-specialize.c.inc
@@ -171,6 +171,25 @@ static void parts64_default_nan(FloatParts64 *p,
float_status *status)
};
}
+static void parts128_default_nan(FloatParts128 *p, float_status *status)
+{
+ /*
+ * Extrapolate from the choices made by parts64_default_nan to fill
+ * in the quad-floating format. If the low bit is set, assume we
+ * want to set all non-snan bits.
+ */
+ FloatParts64 p64;
+ parts64_default_nan(&p64, status);
+
+ *p = (FloatParts128) {
+ .cls = float_class_qnan,
+ .sign = p64.sign,
+ .exp = INT_MAX,
+ .frac_hi = p64.frac,
+ .frac_lo = -(p64.frac & 1)
+ };
+}
+
/*----------------------------------------------------------------------------
| Returns a quiet NaN from a signalling NaN for the deconstructed
| floating-point parts.
--
2.25.1
- [PULL 31/46] softfloat: Move sf_canonicalize to softfloat-parts.c.inc, (continued)
- [PULL 31/46] softfloat: Move sf_canonicalize to softfloat-parts.c.inc, Richard Henderson, 2021/05/16
- [PULL 22/46] softfloat: Use pointers with ftype_unpack_canonical, Richard Henderson, 2021/05/16
- [PULL 26/46] softfloat: Convert float128_silence_nan to parts, Richard Henderson, 2021/05/16
- [PULL 25/46] softfloat: Rearrange FloatParts64, Richard Henderson, 2021/05/16
- [PULL 24/46] softfloat: Use pointers with parts_silence_nan, Richard Henderson, 2021/05/16
- [PULL 28/46] softfloat: Move return_nan to softfloat-parts.c.inc, Richard Henderson, 2021/05/16
- [PULL 21/46] softfloat: Use pointers with ftype_pack_raw, Richard Henderson, 2021/05/16
- [PULL 30/46] softfloat: Move pick_nan_muladd to softfloat-parts.c.inc, Richard Henderson, 2021/05/16
- [PULL 34/46] softfloat: Move addsub_floats to softfloat-parts.c.inc, Richard Henderson, 2021/05/16
- [PULL 38/46] softfloat: Use mulu64 for mul64To128, Richard Henderson, 2021/05/16
- [PULL 27/46] softfloat: Convert float128_default_nan to parts,
Richard Henderson <=
- [PULL 35/46] softfloat: Implement float128_add/sub via parts, Richard Henderson, 2021/05/16
- [PULL 37/46] softfloat: Move muladd_floats to softfloat-parts.c.inc, Richard Henderson, 2021/05/16
- [PULL 32/46] softfloat: Move round_canonical to softfloat-parts.c.inc, Richard Henderson, 2021/05/16
- [PULL 39/46] softfloat: Use add192 in mul128To256, Richard Henderson, 2021/05/16
- [PULL 36/46] softfloat: Move mul_floats to softfloat-parts.c.inc, Richard Henderson, 2021/05/16
- [PULL 41/46] softfloat: Introduce sh[lr]_double primitives, Richard Henderson, 2021/05/16
- [PULL 40/46] softfloat: Tidy mul128By64To192, Richard Henderson, 2021/05/16
- [PULL 42/46] softfloat: Move div_floats to softfloat-parts.c.inc, Richard Henderson, 2021/05/16