diff options
| author | hp <hp@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-09-20 03:06:25 +0000 |
|---|---|---|
| committer | hp <hp@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-09-20 03:06:25 +0000 |
| commit | 8fd007d79a04ea4bbd244c755a366b33198fd8cd (patch) | |
| tree | efd31f86a99ed9e398c49c538f5d9db14f66ac53 /gcc/config | |
| parent | 5a5748d4102955bfc29fcd159b1ed5622479af05 (diff) | |
| download | gcc-8fd007d79a04ea4bbd244c755a366b33198fd8cd.tar.gz | |
* config/mmix/mmix.md ("negdf2"): Rewrite.
("*expanded_negdf2"): New.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@57332 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/config')
| -rw-r--r-- | gcc/config/mmix/mmix.md | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/gcc/config/mmix/mmix.md b/gcc/config/mmix/mmix.md index 0f368729312..d234d8c9cb6 100644 --- a/gcc/config/mmix/mmix.md +++ b/gcc/config/mmix/mmix.md @@ -348,13 +348,22 @@ DIVU %1,%1,%2\;GET %0,:rR\;NEGU %2,0,%0\;CSNN %0,$255,%2") "" "NEGU %0,0,%1") -;; FIXME: GCC should be able to synthesize this by itself as "0.0 - x". (define_expand "negdf2" + [(parallel [(set (match_operand:DF 0 "register_operand" "=r") + (neg:DF (match_operand:DF 1 "register_operand" "r"))) + (use (match_dup 2))])] + "" +{ + /* Emit bit-flipping sequence to be IEEE-safe wrt. -+0. */ + operands[2] = force_reg (DImode, GEN_INT ((HOST_WIDE_INT) 1 << 63)); +}) + +(define_insn "*expanded_negdf2" [(set (match_operand:DF 0 "register_operand" "=r") - (minus:DF (match_dup 2) - (match_operand:DF 1 "register_operand" "r")))] + (neg:DF (match_operand:DF 1 "register_operand" "r"))) + (use (match_operand:DI 2 "register_operand" "r"))] "" - "operands[2] = force_reg (DFmode, CONST0_RTX (DFmode));") + "XOR %0,%1,%2") ;; FIXME: define_expand for absdi2? |