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author | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-06 16:52:47 +0000 |
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committer | jsm28 <jsm28@138bc75d-0d04-0410-961f-82ee72b054a4> | 2013-11-06 16:52:47 +0000 |
commit | 4f8f4cb846cfc33c5de37ec80c2ab4209ace7f2a (patch) | |
tree | cae87a5350ed0c4d96974ba136c4cdcae7117138 /gcc/c-family/c-cppbuiltin.c | |
parent | 87351ae8912b4a08209db17300d5b679e55db82f (diff) | |
download | ppe42-gcc-4f8f4cb846cfc33c5de37ec80c2ab4209ace7f2a.tar.gz ppe42-gcc-4f8f4cb846cfc33c5de37ec80c2ab4209ace7f2a.zip |
c-family:
* c-opts.c (c_common_post_options): Set -ffp-contract=off in C
standards modes.
* c-cppbuiltin.c (cpp_iec_559_value): Consider -ffp-contract=fast
to mean lack of IEEE 754 support.
testsuite:
* gcc.dg/torture/c99-contract-1.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@204460 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/c-family/c-cppbuiltin.c')
-rw-r--r-- | gcc/c-family/c-cppbuiltin.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/gcc/c-family/c-cppbuiltin.c b/gcc/c-family/c-cppbuiltin.c index 61a124c509c..b9a0f18cd7e 100644 --- a/gcc/c-family/c-cppbuiltin.c +++ b/gcc/c-family/c-cppbuiltin.c @@ -726,16 +726,19 @@ cpp_iec_559_value (void) ret = 0; /* In strict C standards conformance mode, consider unpredictable - excess precision to mean lack of IEEE 754 support. ??? The same - should apply to unpredictable contraction, but at present - standards conformance options do not enable conforming - contraction. For C++, and outside strict conformance mode, do - not consider these options to mean lack of IEEE 754 support. */ + excess precision to mean lack of IEEE 754 support. The same + applies to unpredictable contraction. For C++, and outside + strict conformance mode, do not consider these options to mean + lack of IEEE 754 support. */ if (flag_iso && !c_dialect_cxx () && TARGET_FLT_EVAL_METHOD != 0 && flag_excess_precision_cmdline != EXCESS_PRECISION_STANDARD) ret = 0; + if (flag_iso + && !c_dialect_cxx () + && flag_fp_contract_mode == FP_CONTRACT_FAST) + ret = 0; /* Various options are contrary to IEEE 754 semantics. */ if (flag_unsafe_math_optimizations |