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| author | Roger Sayle <roger@eyesopen.com> | 2002-07-28 02:11:05 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2002-07-28 02:11:05 +0000 |
| commit | 52bfebf09121f90fb62f448ccb817ce9208d8f24 (patch) | |
| tree | 811f8a9808cc8a4ff4fa003afa503d9d758bdcc8 /gcc/c-common.c | |
| parent | e66f55b878b78b51895f907fd624b583732d7659 (diff) | |
| download | gcc-52bfebf09121f90fb62f448ccb817ce9208d8f24.zip gcc-52bfebf09121f90fb62f448ccb817ce9208d8f24.tar.gz gcc-52bfebf09121f90fb62f448ccb817ce9208d8f24.tar.bz2 | |
Makefile.in: rtlanal.o now depends upon real.h.
* Makefile.in: rtlanal.o now depends upon real.h.
* flags.h [flag_signaling_nans]: New flag.
[HONOR_SNANS]: New macro.
* toplev.c [flag_signaling_nans]: Initialize to false.
(f_options): Add processing for "-fsignaling-nans".
(set_fast_math_flags): Clear flag_signaling_nans with -ffast-math.
(process_options): flag_signaling_nans implies flag_trapping_math.
* c-common.c (cb_register_builtins): Define __SUPPORT_SNAN__
when -fsignaling-nans. First step to implementing WG14's N965.
* fold-const.c (fold) [MULT_EXPR]: Conditionalize transforming
1.0 * x into x, and -1.0 * x into -x on !HONOR_SNANS.
[RDIV_EXPR]: Conditionalize x/1.0 into x on !HONOR_SNANS.
* simplify-rtx.c (simplify_relational_operation): Conditionalize
transforming abs(x) < 0.0 into false on !HONOR_SNANS.
* rtlanal.c: #include real.c for TARGET_FLOAT_FORMAT definitions
required by HONOR_SNANS. (may_trap_p): Floating point DIV, MOD,
UDIV, UMOD, GE, GT, LE, LT and COMPARE may always trap with
-fsignaling_nans. EQ and NE only trap for flag_signaling_nans
not flag_trapping_math (i.e. HONOR_SNANS but not HONOR_NANS).
* doc/invoke.texi: Document new -fsignaling-nans compiler option.
From-SVN: r55804
Diffstat (limited to 'gcc/c-common.c')
| -rw-r--r-- | gcc/c-common.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gcc/c-common.c b/gcc/c-common.c index 88c3ef5..f7bbc1b 100644 --- a/gcc/c-common.c +++ b/gcc/c-common.c @@ -4383,6 +4383,8 @@ cb_register_builtins (pfile) cpp_define (pfile, "__FAST_MATH__"); if (flag_no_inline) cpp_define (pfile, "__NO_INLINE__"); + if (flag_signaling_nans) + cpp_define (pfile, "__SUPPORT_SNAN__"); if (flag_iso) cpp_define (pfile, "__STRICT_ANSI__"); |