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authorBharata B Rao <bharata@linux.vnet.ibm.com>2017-02-10 12:53:07 +0530
committerDavid Gibson <david@gibson.dropbear.id.au>2017-02-22 11:28:28 +1100
commitfd425037d25cecaaffdb3831697e0adc10ca2ba3 (patch)
tree28c0d9e433f0bfca273aa840a065accd3603ea51 /fpu/softfloat.c
parent2e6d85683576c970c714c1cc071dca742835b9d4 (diff)
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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 <bharata@linux.vnet.ibm.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'fpu/softfloat.c')
-rw-r--r--fpu/softfloat.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index 47e4646..485a006 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -6188,6 +6188,34 @@ uint64_t float128_to_uint64_round_to_zero(float128 a, float_status *status)
/*----------------------------------------------------------------------------
| 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
| is performed according to the IEC/IEEE Standard for Binary Floating-Point
| Arithmetic.