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authorMatheus Ferst <matheus.ferst@eldorado.org.br>2022-03-30 14:59:28 -0300
committerDaniel Henrique Barboza <danielhb413@gmail.com>2022-04-20 18:00:30 -0300
commit95c1b71e25a9bafb64e4dd69f8834716332a7542 (patch)
tree44f7528b5138571bb04355e378c0e352f1c3bacf /fpu
parentf279852b89bd42289c421714221c860e71fb4639 (diff)
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softfloat: add int128_to_float128
Based on parts_sint_to_float, implements int128_to_float128 to convert a signed 128-bit value received through an Int128 argument. Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br> Message-Id: <20220330175932.6995-5-matheus.ferst@eldorado.org.br> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Diffstat (limited to 'fpu')
-rw-r--r--fpu/softfloat.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 57445b3..60b4702 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -3780,6 +3780,35 @@ bfloat16 int16_to_bfloat16(int16_t a, float_status *status)
return int64_to_bfloat16_scalbn(a, 0, status);
}
+float128 int128_to_float128(Int128 a, float_status *status)
+{
+ FloatParts128 p = { };
+ int shift;
+
+ if (int128_nz(a)) {
+ p.cls = float_class_normal;
+ if (!int128_nonneg(a)) {
+ p.sign = true;
+ a = int128_neg(a);
+ }
+
+ 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);
+}
+
float128 int64_to_float128(int64_t a, float_status *status)
{
FloatParts128 p;