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| author | Doug Evans <dje@gnu.org> | 1994-11-17 20:14:21 +0000 |
|---|---|---|
| committer | Doug Evans <dje@gnu.org> | 1994-11-17 20:14:21 +0000 |
| commit | b82b6eea9339954d55d1e189565f8574bd95f9e3 (patch) | |
| tree | 71e6865a183347deedd2fcae9a64bd096f992818 | |
| parent | 13d50804a069f42c12e54d56f523ee5cad386bd1 (diff) | |
| download | gcc-b82b6eea9339954d55d1e189565f8574bd95f9e3.zip gcc-b82b6eea9339954d55d1e189565f8574bd95f9e3.tar.gz gcc-b82b6eea9339954d55d1e189565f8574bd95f9e3.tar.bz2 | |
(expand_unop): Try subtraction from zero if there isn't a
negate library function.
From-SVN: r8485
| -rw-r--r-- | gcc/optabs.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/optabs.c b/gcc/optabs.c index db68da8..724f36b 100644 --- a/gcc/optabs.c +++ b/gcc/optabs.c @@ -2041,6 +2041,17 @@ expand_unop (mode, unoptab, op0, target, unsignedp) } } + /* If there is no negate operation, try doing a subtract from zero. + The US Software GOFAST library needs this. */ + if (unoptab == neg_optab) + { + rtx temp; + temp = expand_binop (mode, sub_optab, CONST0_RTX (mode), op0, + target, unsignedp, OPTAB_LIB_WIDEN); + if (temp) + return temp; + } + return 0; } |