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rs6000.c (special_handling_values): Add SH_EXTRACT.

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[gcc]

2014-09-04  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* config/rs6000/rs6000.c (special_handling_values): Add
	SH_EXTRACT.
	(rtx_is_swappable_p): Look for patterns with a VEC_SELECT, perhaps
	wrapped in a VEC_DUPLICATE, representing an extract.  Mark these
	as swappable with special handling SH_EXTRACT.  Remove
	UNSPEC_VSX_XXSPLTW from the list of disallowed unspecs for the
	optimization.
	(adjust_extract): New function.
	(handle_special_swappables): Add default to case statement; add
	case for SH_EXTRACT that calls adjust_extract.
	(dump_swap_insn_table): Handle SH_EXTRACT.

[gcc/testsuite]

2014-09-04  Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	* gcc.target/powerpc/swaps-p8-13.c: New test.
	* gcc.target/powerpc/swaps-p8-14.c: New test.
	* gcc.target/powerpc/swaps-p8-15.c: New test.

From-SVN: r214903
This commit is contained in:
Bill Schmidt 2014-09-04 14:31:34 +00:00 committed by William Schmidt
parent 2b3106ecef
commit 6bf5ce8f85
6 changed files with 217 additions and 3 deletions
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14
gcc/ChangeLog
View File

@ -1,3 +1,17 @@
2014-09-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* config/rs6000/rs6000.c (special_handling_values): Add
SH_EXTRACT.
(rtx_is_swappable_p): Look for patterns with a VEC_SELECT, perhaps
wrapped in a VEC_DUPLICATE, representing an extract. Mark these
as swappable with special handling SH_EXTRACT. Remove
UNSPEC_VSX_XXSPLTW from the list of disallowed unspecs for the
optimization.
(adjust_extract): New function.
(handle_special_swappables): Add default to case statement; add
case for SH_EXTRACT that calls adjust_extract.
(dump_swap_insn_table): Handle SH_EXTRACT.
2014-09-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* config/rs6000/vsx.md (*vsx_extract_<mode>_load): Always match

56
gcc/config/rs6000/rs6000.c
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@ -33523,7 +33523,8 @@ enum special_handling_values {
SH_CONST_VECTOR,
SH_SUBREG,
SH_NOSWAP_LD,
SH_NOSWAP_ST
SH_NOSWAP_ST,
SH_EXTRACT
};
/* Union INSN with all insns containing definitions that reach USE.
@ -33665,6 +33666,7 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
{
enum rtx_code code = GET_CODE (op);
int i, j;
rtx parallel;
switch (code)
{
@ -33675,7 +33677,6 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
return 1;
case VEC_CONCAT:
case VEC_SELECT:
case ASM_INPUT:
case ASM_OPERANDS:
return 0;
@ -33693,6 +33694,28 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
handling. */
if (GET_CODE (XEXP (op, 0)) == CONST_INT)
return 1;
else if (GET_CODE (XEXP (op, 0)) == REG
&& GET_MODE_INNER (GET_MODE (op)) == GET_MODE (XEXP (op, 0)))
/* This catches V2DF and V2DI splat, at a minimum. */
return 1;
else if (GET_CODE (XEXP (op, 0)) == VEC_SELECT)
/* If the duplicated item is from a select, defer to the select
processing to see if we can change the lane for the splat. */
return rtx_is_swappable_p (XEXP (op, 0), special);
else
return 0;
case VEC_SELECT:
/* A vec_extract operation is ok if we change the lane. */
if (GET_CODE (XEXP (op, 0)) == REG
&& GET_MODE_INNER (GET_MODE (XEXP (op, 0))) == GET_MODE (op)
&& GET_CODE ((parallel = XEXP (op, 1))) == PARALLEL
&& XVECLEN (parallel, 0) == 1
&& GET_CODE (XVECEXP (parallel, 0, 0)) == CONST_INT)
{
*special = SH_EXTRACT;
return 1;
}
else
return 0;
@ -33738,7 +33761,6 @@ rtx_is_swappable_p (rtx op, unsigned int *special)
|| val == UNSPEC_VSX_CVSPDPN
|| val == UNSPEC_VSX_SET
|| val == UNSPEC_VSX_SLDWI
|| val == UNSPEC_VSX_XXSPLTW
|| val == UNSPEC_VUNPACK_HI_SIGN
|| val == UNSPEC_VUNPACK_HI_SIGN_DIRECT
|| val == UNSPEC_VUNPACK_LO_SIGN
@ -34076,6 +34098,27 @@ permute_store (rtx_insn *insn)
INSN_UID (insn));
}
/* Given OP that contains a vector extract operation, change the index
of the extracted lane to count from the other side of the vector. */
static void
adjust_extract (rtx_insn *insn)
{
rtx body = PATTERN (insn);
/* The vec_select may be wrapped in a vec_duplicate for a splat, so
account for that. */
rtx sel = (GET_CODE (body) == VEC_DUPLICATE
? XEXP (XEXP (body, 0), 1)
: XEXP (body, 1));
rtx par = XEXP (sel, 1);
int nunits = GET_MODE_NUNITS (GET_MODE (XEXP (sel, 0)));
XVECEXP (par, 0, 0) = GEN_INT (nunits - 1 - INTVAL (XVECEXP (par, 0, 0)));
INSN_CODE (insn) = -1; /* Force re-recognition. */
df_insn_rescan (insn);
if (dump_file)
fprintf (dump_file, "Changing lane for extract %d\n", INSN_UID (insn));
}
/* The insn described by INSN_ENTRY[I] can be swapped, but only
with special handling. Take care of that here. */
static void
@ -34086,6 +34129,8 @@ handle_special_swappables (swap_web_entry *insn_entry, unsigned i)
switch (insn_entry[i].special_handling)
{
default:
gcc_unreachable ();
case SH_CONST_VECTOR:
{
/* A CONST_VECTOR will only show up somewhere in the RHS of a SET. */
@ -34112,6 +34157,9 @@ handle_special_swappables (swap_web_entry *insn_entry, unsigned i)
/* Convert a non-permuting store to a permuting one. */
permute_store (insn);
break;
case SH_EXTRACT:
/* Change the lane on an extract operation. */
adjust_extract (insn);
}
}
@ -34180,6 +34228,8 @@ dump_swap_insn_table (swap_web_entry *insn_entry)
fputs ("special:load ", dump_file);
else if (insn_entry[i].special_handling == SH_NOSWAP_ST)
fputs ("special:store ", dump_file);
else if (insn_entry[i].special_handling == SH_EXTRACT)
fputs ("special:extract ", dump_file);
}
if (insn_entry[i].web_not_optimizable)
fputs ("unoptimizable ", dump_file);

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2014-09-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* gcc.target/powerpc/swaps-p8-13.c: New test.
* gcc.target/powerpc/swaps-p8-14.c: New test.
* gcc.target/powerpc/swaps-p8-15.c: New test.
2014-09-04 Bill Schmidt <wschmidt@linux.vnet.ibm.com>
* gcc.target/powerpc/vsx-extract-1.c: Test 0th doubleword

53
gcc/testsuite/gcc.target/powerpc/swaps-p8-13.c Normal file
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@ -0,0 +1,53 @@
/* { dg-do run { target { powerpc64le-*-* } } } */
/* { dg-options "-mcpu=power8 -O3" } */
#include <altivec.h>
void abort ();
#define N 4096
long long ca[N] __attribute__((aligned(16)));
long long cb[N] __attribute__((aligned(16)));
long long cc[N] __attribute__((aligned(16)));
long long cd[N] __attribute__((aligned(16)));
long long x;
__attribute__((noinline)) void foo ()
{
int i;
vector long long va, vb, vc, vd, tmp;
volatile unsigned long long three = 3;
vector unsigned long long threes = vec_splats (three);
for (i = 0; i < N; i+=2) {
vb = vec_vsx_ld (0, (vector long long *)&cb[i]);
vc = vec_vsx_ld (0, (vector long long *)&cc[i]);
vd = vec_vsx_ld (0, (vector long long *)&cd[i]);
tmp = vec_add (vb, vc);
tmp = vec_sub (tmp, vd);
tmp = vec_sra (tmp, threes);
x = vec_extract (tmp, 0);
vec_vsx_st (tmp, 0, (vector long long *)&ca[i]);
}
}
__attribute__((noinline)) void init ()
{
int i;
for (i = 0; i < N; ++i) {
cb[i] = 3 * i - 2048;
cc[i] = -5 * i + 93;
cd[i] = i + 14;
}
}
int main ()
{
int i;
init ();
foo ();
for (i = 0; i < N; ++i)
if (ca[i] != (-3 * i - 1969) >> 3)
abort ();
if (x != ca[N-1])
abort ();
return 0;
}

42
gcc/testsuite/gcc.target/powerpc/swaps-p8-14.c Normal file
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@ -0,0 +1,42 @@
/* { dg-do compile { target { powerpc64le-*-* } } } */
/* { dg-options "-mcpu=power8 -O3" } */
/* { dg-final { scan-assembler "lxvd2x" } } */
/* { dg-final { scan-assembler "stxvd2x" } } */
/* { dg-final { scan-assembler "stxsdx" } } */
/* { dg-final { scan-assembler-times "xxpermdi" 1 } } */
/* The only xxpermdi expected is for the vec_splats. */
#include <altivec.h>
void abort ();
#define N 4096
long long ca[N] __attribute__((aligned(16)));
long long cb[N] __attribute__((aligned(16)));
long long cc[N] __attribute__((aligned(16)));
long long cd[N] __attribute__((aligned(16)));
long long x;
__attribute__((noinline)) void foo ()
{
int i;
vector long long va, vb, vc, vd, tmp;
volatile unsigned long long three = 3;
vector unsigned long long threes = vec_splats (three);
for (i = 0; i < N; i+=2) {
vb = vec_vsx_ld (0, (vector long long *)&cb[i]);
vc = vec_vsx_ld (0, (vector long long *)&cc[i]);
vd = vec_vsx_ld (0, (vector long long *)&cd[i]);
tmp = vec_add (vb, vc);
tmp = vec_sub (tmp, vd);
tmp = vec_sra (tmp, threes);
x = vec_extract (tmp, 0);
vec_vsx_st (tmp, 0, (vector long long *)&ca[i]);
}
}
int main ()
{
foo ();
return 0;
}

49
gcc/testsuite/gcc.target/powerpc/swaps-p8-15.c Normal file
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@ -0,0 +1,49 @@
/* { dg-do compile { target { powerpc64le-*-* } } } */
/* { dg-options "-mcpu=power8 -O3" } */
/* { dg-final { scan-assembler "lxvd2x" } } */
/* { dg-final { scan-assembler "stxvd2x" } } */
/* { dg-final { scan-assembler "xxspltw" } } */
/* { dg-final { scan-assembler-not "xxpermdi" } } */
#include <altivec.h>
void abort();
typedef struct xx {vector double l; vector double h;} xx;
#define N 4096
#define M 10000000
vector float ca[N][4] = {0};
vector float cb[N][4] = {0};
vector float cc[N][4] = {0};
__attribute__((noinline)) void foo ()
{
int i;
for (i = 0; i < N; i++) {
cc[i][0] = vec_mul(vec_splats(cb[i][0][0]), ca[i][0]);
cc[i][0] = vec_madd(cc[i][0],vec_splats(cb[i][0][1]), ca[i][1]);
cc[i][0] = vec_madd(cc[i][0],vec_splats(cb[i][0][2]), ca[i][2]);
cc[i][0] = vec_madd(cc[i][0],vec_splats(cb[i][0][3]), ca[i][3]);
cc[i][1] = vec_mul(vec_splats(cb[i][1][0]), ca[i][0]);
cc[i][1] = vec_madd(cc[i][0],vec_splats(cb[i][1][1]), ca[i][1]);
cc[i][1] = vec_madd(cc[i][0],vec_splats(cb[i][1][2]), ca[i][2]);
cc[i][1] = vec_madd(cc[i][0],vec_splats(cb[i][1][3]), ca[i][3]);
cc[i][2] = vec_mul(vec_splats(cb[i][2][0]), ca[i][0]);
cc[i][2] = vec_madd(cc[i][0],vec_splats(cb[i][2][1]), ca[i][1]);
cc[i][2] = vec_madd(cc[i][0],vec_splats(cb[i][2][2]), ca[i][2]);
cc[i][2] = vec_madd(cc[i][0],vec_splats(cb[i][2][3]), ca[i][3]);
cc[i][3] = vec_mul(vec_splats(cb[i][3][0]), ca[i][0]);
cc[i][3] = vec_madd(cc[i][0],vec_splats(cb[i][3][1]), ca[i][1]);
cc[i][3] = vec_madd(cc[i][0],vec_splats(cb[i][3][2]), ca[i][2]);
cc[i][3] = vec_madd(cc[i][0],vec_splats(cb[i][3][3]), ca[i][3]);
}
}
int main ()
{
foo ();
return 0;
}