[PATCH] Fix modf/f for NaN input
Fabian Schriever <[email protected]>
| Newsgroups | gmane.comp.lib.newlib |
|---|---|
| Message-ID | <[email protected]> |
For NaN input the modf/f procedures should return NaN instead of zero
with the sign of the input.
---
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;
--
2.24.1.windows.2