From 467214fdd324396920f24256f9c614b1f1718c5f Mon Sep 17 00:00:00 2001 From: sayle Date: Mon, 7 Jun 2004 20:50:14 +0000 Subject: * 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/real.c | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'gcc/real.c') diff --git a/gcc/real.c b/gcc/real.c index e702b2d675a..65d57c30a53 100644 --- a/gcc/real.c +++ b/gcc/real.c @@ -4587,3 +4587,11 @@ real_round (REAL_VALUE_TYPE *r, enum machine_mode mode, real_convert (r, mode, r); } +/* Set the sign of R to the sign of X. */ + +void +real_copysign (REAL_VALUE_TYPE *r, const REAL_VALUE_TYPE *x) +{ + r->sign = x->sign; +} + -- cgit v1.2.1