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[ARC] Update fma expansions.

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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.

From-SVN: r261543
This commit is contained in:
Claudiu Zissulescu 2018-06-13 10:54:09 +02:00 • committed by Claudiu Zissulescu
parent 16493b5771
commit 8c191c89cf
4 changed files with 28 additions and 0 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2018-06-12 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/fpu.md (fmasf4): Force operand to register.
(fnmasf4): Likewise.
2018-06-12 Claudiu Zissulescu <claziss@synopsys.com>
* config/arc/arc-protos.h (arc_pad_return): Remove.

6
gcc/config/arc/fpu.md
View file

@ -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"

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2018-06-12 Claudiu Zissulescu <claziss@synopsys.com>
* gcc.target/arc/fma-1.c: New test.
2018-06-12 Claudiu Zissulescu <claziss@synopsys.com>
* gcc.target/arc/pr9001107555.c: New file.

13
gcc/testsuite/gcc.target/arc/fma-1.c Normal file
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@ -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" } } */