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sync.md (atomic_fetch_sub): Fix negation and avoid clobbering a live register.

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2014-01-25  Walter Lee  <walt@tilera.com>

            * config/tilegx/sync.md (atomic_fetch_sub): Fix negation and
            avoid clobbering a live register.

From-SVN: r207084
This commit is contained in:
Walter Lee 2014-01-25 20:31:38 +00:00 committed by Walter Lee
parent dab03fe308
commit 6bb0e2489c
2 changed files with 14 additions and 2 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2014-01-25 Walter Lee <walt@tilera.com>
* config/tilegx/sync.md (atomic_fetch_sub): Fix negation and
avoid clobbering a live register.
2014-01-25 Walter Lee <walt@tilera.com>
* config/tilegx/tilegx-c.c (tilegx_cpu_cpp_builtins):

11
gcc/config/tilegx/sync.md
View File

@ -150,15 +150,22 @@
(match_operand:SI 3 "const_int_operand" "")] ;; model
""
{
rtx addend;
enum memmodel model = (enum memmodel) INTVAL (operands[3]);
if (operands[2] != const0_rtx)
emit_move_insn (operands[2], gen_rtx_NEG (<MODE>mode, operands[2]));
{
addend = gen_reg_rtx (<MODE>mode);
emit_move_insn (addend,
gen_rtx_MINUS (<MODE>mode, const0_rtx, operands[2]));
}
else
addend = operands[2];
tilegx_pre_atomic_barrier (model);
emit_insn (gen_atomic_fetch_add_bare<mode> (operands[0],
operands[1],
operands[2]));
addend));
tilegx_post_atomic_barrier (model);
DONE;
})