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[PATCH] Convert 0.0/0.0 to NAN
- From: Richard Allen <rsaxvc at rsaxvc dot net>
- To: newlib at sourceware dot org
- Date: Wed, 19 Apr 2017 18:50:45 -0500
- Subject: [PATCH] Convert 0.0/0.0 to NAN
- Authentication-results: sourceware.org; auth=none
With newlib's default compiler flags(-O2 and whatnot),
the GCC I'm using creates calls to __aeabi_(f|d)div.
This causes a little extra register copying
and an unnecessary branch.
Additionally, __aeabi_?div may throw exceptions,
which is probably not what we want a
simple assignment to do.
Compiler version tested:
arm-none-eabi-gcc (15:5.4.1+svn241155-1) 5.4.1 20160919
-Richard
From 2369a552cf62dfb53f14978587a338072f6abd2c Mon Sep 17 00:00:00 2001
From: Richard <rsaxvc@rsaxvc.net>
Date: Wed, 19 Apr 2017 18:37:17 -0500
Subject: [PATCH] Convert rint() to rintf()
This was causing an unnecessary increase
in precision, as well as additional function
calls to do float->double conversion on
platforms with only a single-precision FPU.
---
newlib/libm/math/wf_pow.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/newlib/libm/math/wf_pow.c b/newlib/libm/math/wf_pow.c
index bd9de0ad0..5b79dd151 100644
--- a/newlib/libm/math/wf_pow.c
+++ b/newlib/libm/math/wf_pow.c
@@ -126,11 +126,11 @@
if (_LIB_VERSION == _SVID_) {
exc.retval = HUGE;
y *= 0.5;
- if(x<0.0&&rint(y)!=y) exc.retval = -HUGE;
+ if(x<0.0&&rintf(y)!=y) exc.retval = -HUGE;
} else {
exc.retval = HUGE_VAL;
y *= 0.5;
- if(x<0.0&&rint(y)!=y) exc.retval = -HUGE_VAL;
+ if(x<0.0&&rintf(y)!=y) exc.retval = -HUGE_VAL;
}
if (_LIB_VERSION == _POSIX_)
errno = ERANGE;
--
2.11.0