diff options
| author | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2012-10-18 13:16:11 +0000 |
|---|---|---|
| committer | Ulrich Weigand <ulrich.weigand@de.ibm.com> | 2012-10-18 13:16:11 +0000 |
| commit | d34b5bd610c56354810e154c11b0119e657aa452 (patch) | |
| tree | b1e8506c2ac5afb2ff8f9ebe99ba8a76d87a271f /clang/test/Index/annotate-comments-availability-attrs.cpp | |
| parent | b9fdf27357d2702a6ec90f063cd14d052e86b953 (diff) | |
| download | bcm5719-llvm-d34b5bd610c56354810e154c11b0119e657aa452.tar.gz bcm5719-llvm-d34b5bd610c56354810e154c11b0119e657aa452.zip | |
This patch fixes failures in the SingleSource/Regression/C/uint64_to_float
test case on PowerPC caused by rounding errors when converting from a 64-bit
integer to a single-precision floating point. The reason for this are
double-rounding effects, since on PowerPC we have to convert to an
intermediate double-precision value first, which gets rounded to the
final single-precision result.
The patch fixes the problem by preparing the 64-bit integer so that the
first conversion step to double-precision will always be exact, and the
final rounding step will result in the correctly-rounded single-precision
result. The generated code sequence is equivalent to what GCC would generate.
When -enable-unsafe-fp-math is in effect, that extra effort is omitted
and we accept possible rounding errors (just like GCC does as well).
llvm-svn: 166178
Diffstat (limited to 'clang/test/Index/annotate-comments-availability-attrs.cpp')
0 files changed, 0 insertions, 0 deletions
