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| author | das <das@FreeBSD.org> | 2008-07-31 19:57:50 +0000 |
|---|---|---|
| committer | das <das@FreeBSD.org> | 2008-07-31 19:57:50 +0000 |
| commit | 9f333dcb2cca361c8dcfe7743d1061e62e59913a (patch) | |
| tree | 1eeb1f3e2bd18382c5a4cd6b9eac79e12656a791 /lib/msun/src/s_atan.c | |
| parent | 99ec4c843d18fdc20a8ba8ec77c64558085c8794 (diff) | |
| download | FreeBSD-src-9f333dcb2cca361c8dcfe7743d1061e62e59913a.zip FreeBSD-src-9f333dcb2cca361c8dcfe7743d1061e62e59913a.tar.gz | |
As in other parts of libm, mark a few constants as volatile to prevent
spurious optimizations. gcc doesn't support FENV_ACCESS, so when it
folds constants, it assumes that the rounding mode is always the
default and floating point exceptions never matter.
Diffstat (limited to 'lib/msun/src/s_atan.c')
| -rw-r--r-- | lib/msun/src/s_atan.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/msun/src/s_atan.c b/lib/msun/src/s_atan.c index 4b0ab89..01e7bea 100644 --- a/lib/msun/src/s_atan.c +++ b/lib/msun/src/s_atan.c @@ -82,8 +82,8 @@ atan(double x) if(ix>0x7ff00000|| (ix==0x7ff00000&&(low!=0))) return x+x; /* NaN */ - if(hx>0) return atanhi[3]+atanlo[3]; - else return -atanhi[3]-atanlo[3]; + if(hx>0) return atanhi[3]+*(volatile double *)&atanlo[3]; + else return -atanhi[3]-*(volatile double *)&atanlo[3]; } if (ix < 0x3fdc0000) { /* |x| < 0.4375 */ if (ix < 0x3e200000) { /* |x| < 2^-29 */ if(huge+x>one) return x; /* raise inexact */ |
