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| author | Laurent Vivier | 2017-06-28 22:42:38 +0200 |
|---|---|---|
| committer | Laurent Vivier | 2017-06-29 20:27:39 +0200 |
| commit | 0f72129281765ed64d26353284059f2bdcde7a23 (patch) | |
| tree | 4092bf1b51512a9d25067587b97630314f034fd0 /fpu | |
| parent | target/m68k: add explicit single and double precision operations (diff) | |
| download | qemu-0f72129281765ed64d26353284059f2bdcde7a23.tar.gz qemu-0f72129281765ed64d26353284059f2bdcde7a23.tar.xz qemu-0f72129281765ed64d26353284059f2bdcde7a23.zip | |
softfloat: define floatx80_round()
Add a function to round a floatx80 to the defined precision
(floatx80_rounding_precision)
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <20170628204241.32106-5-laurent@vivier.eu>
Diffstat (limited to 'fpu')
| -rw-r--r-- | fpu/softfloat.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 7af14e29aa..433c5dad2d 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -5086,6 +5086,22 @@ float128 floatx80_to_float128(floatx80 a, float_status *status) } /*---------------------------------------------------------------------------- +| Rounds the extended double-precision floating-point value `a' +| to the precision provided by floatx80_rounding_precision and returns the +| result as an extended double-precision floating-point value. +| The operation is performed according to the IEC/IEEE Standard for Binary +| Floating-Point Arithmetic. +*----------------------------------------------------------------------------*/ + +floatx80 floatx80_round(floatx80 a, float_status *status) +{ + return roundAndPackFloatx80(status->floatx80_rounding_precision, + extractFloatx80Sign(a), + extractFloatx80Exp(a), + extractFloatx80Frac(a), 0, status); +} + +/*---------------------------------------------------------------------------- | Rounds the extended double-precision floating-point value `a' to an integer, | and returns the result as an extended quadruple-precision floating-point | value. The operation is performed according to the IEC/IEEE Standard for |