Previously users of mulsidi_600 and umulsidi_600 had to take care of
moving the multiplication result into the final destination themselves
(from the MUL64_OUT_REG register). This commit converts these two
instruction patterns into insn_and_split patterns that now take the
final destination as an extra operand. The insn_and_split patterns
generate the multiplication using two new multiplication instruction
patterns, then generate the move of the result from the MUL64_OUT_REG
register into the final destination.
This is a clean up commit, there should be no user visible changes
after this commit.
2016-12-16 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc.md (mulsidi_600): Change to insn_and_split,
generate new mul64 insn for core multiplication work.
(umulsidi_600): Likewise, but use mulu64 insn.
(mul64): New pattern, content taken from old mulsidi_600 insn
pattern.
(mulu64): Likewise, but using umulsidi_600.
(mulsidi3): Remove move to destination, this is now handled by
mulsidi_600 insn_and_split.
(umulsidi3): Likewise, but using umulsidi_600.
From-SVN: r243741
