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* [newlib-cygwin] Fix modf/f for NaN input
@ 2020-03-19 15:34 Corinna Vinschen
0 siblings, 0 replies; only message in thread
From: Corinna Vinschen @ 2020-03-19 15:34 UTC (permalink / raw)
To: newlib-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=4ad9ba42fc3dd116bad8b9cb89d434256d3431fb
commit 4ad9ba42fc3dd116bad8b9cb89d434256d3431fb
Author: Fabian Schriever <fabian.schriever@gtd-gmbh.de>
Date: Wed Mar 18 14:18:20 2020 +0100
Fix modf/f for NaN input
For NaN input the modf/f procedures should return NaN instead of zero
with the sign of the input.
Diff:
---
newlib/libm/common/s_modf.c | 1 +
newlib/libm/common/sf_modf.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/newlib/libm/common/s_modf.c b/newlib/libm/common/s_modf.c
index 8551a99e4..c948b8525 100644
--- a/newlib/libm/common/s_modf.c
+++ b/newlib/libm/common/s_modf.c
@@ -100,6 +100,7 @@ static double one = 1.0;
} else if (j0>51) { /* no fraction part */
__uint32_t high;
*iptr = x*one;
+ if (__fpclassifyd(x) == FP_NAN) return x+x; /* x is NaN, return NaN */
GET_HIGH_WORD(high,x);
INSERT_WORDS(x,high&0x80000000,0); /* return +-0 */
return x;
diff --git a/newlib/libm/common/sf_modf.c b/newlib/libm/common/sf_modf.c
index 6c64e3fa0..ae970762b 100644
--- a/newlib/libm/common/sf_modf.c
+++ b/newlib/libm/common/sf_modf.c
@@ -52,6 +52,7 @@ static float one = 1.0;
} else { /* no fraction part */
__uint32_t ix;
*iptr = x*one;
+ if (__fpclassifyf(x) == FP_NAN) return x+x; /* x is NaN, return NaN */
GET_FLOAT_WORD(ix,x);
SET_FLOAT_WORD(x,ix&0x80000000); /* return +-0 */
return x;
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2020-03-19 15:34 [newlib-cygwin] Fix modf/f for NaN input Corinna Vinschen
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