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