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* real.c (real_copysign): New function to implement libm's copysign.
authorsayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4>
Mon, 7 Jun 2004 20:50:14 +0000 (20:50 +0000)
committersayle <sayle@138bc75d-0d04-0410-961f-82ee72b054a4>
Mon, 7 Jun 2004 20:50:14 +0000 (20:50 +0000)
commit467214fdd324396920f24256f9c614b1f1718c5f
treecf683ee1008a7ca53b18dd77effb242f594c9a57
parent29f35f64b0af5c407822c7e16de1e365a2165025
* real.c (real_copysign): New function to implement libm's copysign.
* real.h (real_copysign): Prototype here.
* fold-const.c (tree_expr_nonnegative_p): The result of sqrt, sqrtf
and sqrtl can be negative, as sqrt(-0.0) = -0.0.  Correct whitespace.
* builtins.c (fold_builtin_isascii, fold_builtin_toascii,
fold_builtin_isdigit): Add function prototypes.
(fold_builtin_copysign): New function to fold copysign, copysignf
and copysignl.  Optimize copysign(x,x) as x.  Evaluate copysign of
constant arguments at compile-time using real_copysign.  Fold
copysign(X,Y) as fabs(X) if Y is always non-negative.
(fold_builtin_1): Correct minor whitespace/style issues.  Call
fold_builtin_copysign for BUILT_IN_COPYSIGN{,F,L}.

* gcc.dg/builtins-41.c: New test case.
* gcc.dg/builtins-42.c: New test case.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@82721 138bc75d-0d04-0410-961f-82ee72b054a4
gcc/ChangeLog
gcc/builtins.c
gcc/fold-const.c
gcc/real.c
gcc/real.h
gcc/testsuite/ChangeLog
gcc/testsuite/gcc.dg/builtins-41.c [new file with mode: 0644]
gcc/testsuite/gcc.dg/builtins-42.c [new file with mode: 0644]