From 6bb0e2489c855b8354797a846d84bf6bab41bee5 Mon Sep 17 00:00:00 2001 From: Walter Lee Date: Sat, 25 Jan 2014 20:31:38 +0000 Subject: [PATCH] sync.md (atomic_fetch_sub): Fix negation and avoid clobbering a live register. 2014-01-25 Walter Lee * config/tilegx/sync.md (atomic_fetch_sub): Fix negation and avoid clobbering a live register. From-SVN: r207084 --- gcc/ChangeLog | 5 +++++ gcc/config/tilegx/sync.md | 11 +++++++++-- 2 files changed, 14 insertions(+), 2 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index db40e1826ef..ccbea0f7158 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2014-01-25 Walter Lee + + * config/tilegx/sync.md (atomic_fetch_sub): Fix negation and + avoid clobbering a live register. + 2014-01-25 Walter Lee * config/tilegx/tilegx-c.c (tilegx_cpu_cpp_builtins): diff --git a/gcc/config/tilegx/sync.md b/gcc/config/tilegx/sync.md index 586025760f4..3d9349301ca 100644 --- a/gcc/config/tilegx/sync.md +++ b/gcc/config/tilegx/sync.md @@ -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, operands[2])); + { + addend = gen_reg_rtx (mode); + emit_move_insn (addend, + gen_rtx_MINUS (mode, const0_rtx, operands[2])); + } + else + addend = operands[2]; tilegx_pre_atomic_barrier (model); emit_insn (gen_atomic_fetch_add_bare (operands[0], operands[1], - operands[2])); + addend)); tilegx_post_atomic_barrier (model); DONE; }) -- 2.30.2