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authorMatheus Ferst <matheus.ferst@eldorado.org.br>2022-03-30 14:59:27 -0300
committerDaniel Henrique Barboza <danielhb413@gmail.com>2022-04-20 18:00:30 -0300
commitf279852b89bd42289c421714221c860e71fb4639 (patch)
treeb02e6605f1e68b8755d63dabcfa3b6ca4bad7ee8 /fpu
parent613cf0fcbabee5ec34cab85a933eb3d46845a7cb (diff)
softfloat: add uint128_to_float128
Based on parts_uint_to_float, implements uint128_to_float128 to convert an unsigned 128-bit value received through an Int128 argument. Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20220330175932.6995-4-matheus.ferst@eldorado.org.br> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'fpu')
-rw-r--r--fpu/softfloat.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 7f524d4377..57445b36e7 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -3969,6 +3969,31 @@ float128 uint64_to_float128(uint64_t a, float_status *status)
return float128_round_pack_canonical(&p, status);
}
+float128 uint128_to_float128(Int128 a, float_status *status)
+{
+ FloatParts128 p = { };
+ int shift;
+
+ if (int128_nz(a)) {
+ p.cls = float_class_normal;
+
+ shift = clz64(int128_gethi(a));
+ if (shift == 64) {
+ shift += clz64(int128_getlo(a));
+ }
+
+ p.exp = 127 - shift;
+ a = int128_lshift(a, shift);
+
+ p.frac_hi = int128_gethi(a);
+ p.frac_lo = int128_getlo(a);
+ } else {
+ p.cls = float_class_zero;
+ }
+
+ return float128_round_pack_canonical(&p, status);
+}
+
/*
* Minimum and maximum
*/