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alpha: widening multiply pattern

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* config/alpha/alpha.md (umulditi3): New.

From-SVN: r195668
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Richard Henderson 2013-02-01 08:34:28 -08:00 committed by Richard Henderson
parent 749af8ee12
commit ff2a9d88b4
2 changed files with 17 additions and 0 deletions
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2
gcc/ChangeLog
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@ -3,6 +3,8 @@
* config/rs6000/rs6000.md (smulditi3): New.
(umulditi3): New.
* config/alpha/alpha.md (umulditi3): New.
2013-02-01 David Edelsohn <dje.gcc@gmail.com>
* config/rs6000/xcoff.h (ASM_OUTPUT_ALIGNED_COMMON): Use floor_log2.

15
gcc/config/alpha/alpha.md
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@ -719,6 +719,21 @@
"umulh %1,%2,%0"
[(set_attr "type" "imul")
(set_attr "opsize" "udi")])
(define_expand "umulditi3"
[(set (match_operand:TI 0 "register_operand")
(mult:TI
(zero_extend:TI (match_operand:DI 1 "reg_no_subreg_operand"))
(zero_extend:TI (match_operand:DI 2 "reg_no_subreg_operand"))))]
""
{
rtx l = gen_reg_rtx (DImode), h = gen_reg_rtx (DImode);
emit_insn (gen_muldi3 (l, operands[1], operands[2]));
emit_insn (gen_umuldi3_highpart (h, operands[1], operands[2]));
emit_move_insn (gen_lowpart (DImode, operands[0]), l);
emit_move_insn (gen_highpart (DImode, operands[0]), h);
DONE;
})
;; The divide and remainder operations take their inputs from r24 and
;; r25, put their output in r27, and clobber r23 and r28 on all systems.