From fd425037d25cecaaffdb3831697e0adc10ca2ba3 Mon Sep 17 00:00:00 2001 From: Bharata B Rao Date: Fri, 10 Feb 2017 12:53:07 +0530 Subject: [PATCH] softfloat: Add float128_to_uint32_round_to_zero() float128_to_uint32_round_to_zero() is needed by xscvqpuwz instruction of PowerPC ISA 3.0. Signed-off-by: Bharata B Rao Reviewed-by: Peter Maydell Signed-off-by: David Gibson --- fpu/softfloat.c | 28 ++++++++++++++++++++++++++++ include/fpu/softfloat.h | 1 + 2 files changed, 29 insertions(+) diff --git a/fpu/softfloat.c b/fpu/softfloat.c index 47e4646570..485a006aa7 100644 --- a/fpu/softfloat.c +++ b/fpu/softfloat.c @@ -6186,6 +6186,34 @@ uint64_t float128_to_uint64_round_to_zero(float128 a, float_status *status) return v; } +/*---------------------------------------------------------------------------- +| Returns the result of converting the quadruple-precision floating-point +| value `a' to the 32-bit unsigned integer format. The conversion +| is performed according to the IEC/IEEE Standard for Binary Floating-Point +| Arithmetic except that the conversion is always rounded toward zero. +| If `a' is a NaN, the largest positive integer is returned. Otherwise, +| if the conversion overflows, the largest unsigned integer is returned. +| If 'a' is negative, the value is rounded and zero is returned; negative +| values that do not round to zero will raise the inexact exception. +*----------------------------------------------------------------------------*/ + +uint32_t float128_to_uint32_round_to_zero(float128 a, float_status *status) +{ + uint64_t v; + uint32_t res; + int old_exc_flags = get_float_exception_flags(status); + + v = float128_to_uint64_round_to_zero(a, status); + if (v > 0xffffffff) { + res = 0xffffffff; + } else { + return v; + } + set_float_exception_flags(old_exc_flags, status); + float_raise(float_flag_invalid, status); + return res; +} + /*---------------------------------------------------------------------------- | Returns the result of converting the quadruple-precision floating-point | value `a' to the single-precision floating-point format. The conversion diff --git a/include/fpu/softfloat.h b/include/fpu/softfloat.h index a09ad0ea14..f1288efa87 100644 --- a/include/fpu/softfloat.h +++ b/include/fpu/softfloat.h @@ -716,6 +716,7 @@ int64_t float128_to_int64(float128, float_status *status); int64_t float128_to_int64_round_to_zero(float128, float_status *status); uint64_t float128_to_uint64(float128, float_status *status); uint64_t float128_to_uint64_round_to_zero(float128, float_status *status); +uint32_t float128_to_uint32_round_to_zero(float128, float_status *status); float32 float128_to_float32(float128, float_status *status); float64 float128_to_float64(float128, float_status *status); floatx80 float128_to_floatx80(float128, float_status *status);