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From 5664ecf49828edb20f53937ab2e417ba173fc903 Mon Sep 17 00:00:00 2001
From: claziss <claziss@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Wed, 13 Jun 2018 08:54:09 +0000
Subject: [PATCH] [ARC] Update fma expansions.
Accept at most a single constant for fma patterns.
gcc/
2018-03-21 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/fpu.md (fmasf4): Force operand to register.
(fnmasf4): Likewise.
gcc/testsuite
2018-03-21 Claudiu Zissulescu <claziss@synopsys.com>
* gcc.target/arc/fma-1.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@261543 138bc75d-0d04-0410-961f-82ee72b054a4
---
gcc/config/arc/fpu.md | 6 ++++++
gcc/testsuite/gcc.target/arc/fma-1.c | 13 +++++++++++++
2 files changed, 19 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/arc/fma-1.c
diff --git a/gcc/config/arc/fpu.md b/gcc/config/arc/fpu.md
index 5c56f76c679..66a4d91616f 100644
--- a/gcc/config/arc/fpu.md
+++ b/gcc/config/arc/fpu.md
@@ -64,6 +64,9 @@
tmp = gen_rtx_REG (SFmode, ACCL_REGNO);
emit_move_insn (tmp, operands[3]);
operands[3] = tmp;
+ if (!register_operand (operands[1], SFmode)
+ && !register_operand (operands[2], SFmode))
+ operands[2] = force_reg (SFmode, operands[2]);
}")
(define_expand "fnmasf4"
@@ -77,6 +80,9 @@
tmp = gen_rtx_REG (SFmode, ACCL_REGNO);
emit_move_insn (tmp, operands[3]);
operands[3] = tmp;
+ if (!register_operand (operands[1], SFmode)
+ && !register_operand (operands[2], SFmode))
+ operands[2] = force_reg (SFmode, operands[2]);
}")
(define_insn "fmasf4_fpu"
diff --git a/gcc/testsuite/gcc.target/arc/fma-1.c b/gcc/testsuite/gcc.target/arc/fma-1.c
new file mode 100644
index 00000000000..c195ad98127
--- /dev/null
+++ b/gcc/testsuite/gcc.target/arc/fma-1.c
@@ -0,0 +1,13 @@
+/* { dg-do compile } */
+/* { dg-skip-if "FPU not available" { arc700 || arc6xx } } */
+/* { dg-options "-s -std=gnu11 -O2 -frounding-math -mfpu=fpus_all" } */
+
+const float a, b = 7.8539818525e01;
+
+/* Check if the fma operation is generated correctly. */
+
+int foo (void)
+{
+ return (float)3.0 * b + a;
+}
+/* { dg-final { scan-assembler "fsmadd" } } */
--
2.16.2
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