diff options
| author | Matheus Ferst <matheus.ferst@eldorado.org.br> | 2022-03-30 14:59:27 -0300 |
|---|---|---|
| committer | Daniel Henrique Barboza <danielhb413@gmail.com> | 2022-04-20 18:00:30 -0300 |
| commit | f279852b89bd42289c421714221c860e71fb4639 (patch) | |
| tree | b02e6605f1e68b8755d63dabcfa3b6ca4bad7ee8 | |
| parent | 613cf0fcbabee5ec34cab85a933eb3d46845a7cb (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>
| -rw-r--r-- | fpu/softfloat.c | 25 | ||||
| -rw-r--r-- | include/fpu/softfloat.h | 2 |
2 files changed, 27 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 */ diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index d34b2c44d2..8e026e5610 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -95,6 +95,7 @@ typedef enum { #include "fpu/softfloat-types.h" #include "fpu/softfloat-helpers.h" +#include "qemu/int128.h" /*---------------------------------------------------------------------------- | Routine to raise any or all of the software IEC/IEEE floating-point @@ -183,6 +184,7 @@ floatx80 int64_to_floatx80(int64_t, float_status *status); float128 int32_to_float128(int32_t, float_status *status); float128 int64_to_float128(int64_t, float_status *status); float128 uint64_to_float128(uint64_t, float_status *status); +float128 uint128_to_float128(Int128, float_status *status); /*---------------------------------------------------------------------------- | Software half-precision conversion routines. |