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backport: re PR target/72863 (Powerpc64le: redundant swaps when using vec_vsx_ld/st) 

[gcc]

2016-08-25  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	Backport from mainline (minus test for POWER9 support)
	2016-08-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/72863
	* vsx.md (vsx_load_<mode>): For P8LE, emit swaps at expand time.
	(vsx_store_<mode>): Likewise.

[gcc/testsuite]

2016-08-25  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	Backport from mainline
	2016-08-11  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/72863
	* gcc.target/powerpc/pr72863.c: New test.

From-SVN: r239762
This commit is contained in:
Bill Schmidt 2016-08-25 16:12:23 +00:00 committed by William Schmidt
parent 9501daabe2
commit 0a23c3476b
4 changed files with 60 additions and 2 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2016-08-25 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline (minus test for POWER9 support)
2016-08-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/72863
* vsx.md (vsx_load_<mode>): For P8LE, emit swaps at expand time.
(vsx_store_<mode>): Likewise.
2016-08-25 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Backport from mainline

18
gcc/config/rs6000/vsx.md
View File

@ -716,13 +716,27 @@
[(set (match_operand:VSX_M 0 "vsx_register_operand" "")
(match_operand:VSX_M 1 "memory_operand" ""))]
"VECTOR_MEM_VSX_P (<MODE>mode)"
"")
{
/* Expand to swaps if needed, prior to swap optimization. */
if (!BYTES_BIG_ENDIAN)
{
rs6000_emit_le_vsx_move (operands[0], operands[1], <MODE>mode);
DONE;
}
})
(define_expand "vsx_store_<mode>"
[(set (match_operand:VSX_M 0 "memory_operand" "")
(match_operand:VSX_M 1 "vsx_register_operand" ""))]
"VECTOR_MEM_VSX_P (<MODE>mode)"
"")
{
/* Expand to swaps if needed, prior to swap optimization. */
if (!BYTES_BIG_ENDIAN)
{
rs6000_emit_le_vsx_move (operands[0], operands[1], <MODE>mode);
DONE;
}
})
;; VSX vector floating point arithmetic instructions. The VSX scalar

8
gcc/testsuite/ChangeLog
View File

@ -1,3 +1,11 @@
2016-08-25 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
Backport from mainline
2016-08-11 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/72863
* gcc.target/powerpc/pr72863.c: New test.
2016-08-25 Kyrylo Tkachov <kyrylo.tkachov@arm.com>
Backport from mainline

27
gcc/testsuite/gcc.target/powerpc/pr72863.c Normal file
View File

@ -0,0 +1,27 @@
/* { dg-do compile { target { powerpc64le-*-* } } } */
/* { dg-skip-if "do not override -mcpu" { powerpc*-*-* } { "-mcpu=*" } { "-mcpu=power8" } } */
/* { dg-options "-mcpu=power8 -O3" } */
/* { dg-final { scan-assembler "lxvd2x" } } */
/* { dg-final { scan-assembler "stxvd2x" } } */
/* { dg-final { scan-assembler-not "xxpermdi" } } */
#include <altivec.h>
extern unsigned char *src, *dst;
void b(void)
{
int i;
unsigned char *s8 = src;
unsigned char *d8 = dst;
for (i = 0; i < 100; i++) {
vector unsigned char vs = vec_vsx_ld(0, s8);
vector unsigned char vd = vec_vsx_ld(0, d8);
vector unsigned char vr = vec_xor(vs, vd);
vec_vsx_st(vr, 0, d8);
s8 += 16;
d8 += 16;
}
}