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aarch64.md (popcount<mode>2): New pattern. 

2016-02-07  Andrew Pinski  <apinski@cavium.com>

gcc
	* config/aarch64/aarch64.md (popcount<mode>2): New pattern.

gcc/testsuite
	* gcc.target/aarch64/popcount.c : New Testcase.

From-SVN: r245267
This commit is contained in:
Andrew Pinski 2017-02-08 02:54:17 +00:00 committed by Naveen H.S
parent 71aba51d64
commit 9d5019a196
4 changed files with 64 additions and 0 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2017-02-07 Andrew Pinski <apinski@cavium.com>
* config/aarch64/aarch64.md (popcount<mode>2): New pattern.
2017-02-07 Andrew Pinski <apinski@cavium.com>
* config/aarch64/aarch64-cores.def (thunderx): Disable LSE.

33
gcc/config/aarch64/aarch64.md
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@ -3779,6 +3779,39 @@
}
)
;; Pop count be done via the "CNT" instruction in AdvSIMD.
;;
;; MOV v.1d, x0
;; CNT v1.8b, v.8b
;; ADDV b2, v1.8b
;; MOV w0, v2.b[0]
(define_expand "popcount<mode>2"
[(match_operand:GPI 0 "register_operand")
(match_operand:GPI 1 "register_operand")]
"TARGET_SIMD"
{
rtx v = gen_reg_rtx (V8QImode);
rtx v1 = gen_reg_rtx (V8QImode);
rtx r = gen_reg_rtx (QImode);
rtx in = operands[1];
rtx out = operands[0];
if(<MODE>mode == SImode)
{
rtx tmp;
tmp = gen_reg_rtx (DImode);
/* If we have SImode, zero extend to DImode, pop count does
not change if we have extra zeros. */
emit_insn (gen_zero_extendsidi2 (tmp, in));
in = tmp;
}
emit_move_insn (v, gen_lowpart (V8QImode, in));
emit_insn (gen_popcountv8qi2 (v1, v));
emit_insn (gen_reduc_plus_scal_v8qi (r, v1));
emit_insn (gen_zero_extendqi<mode>2 (out, r));
DONE;
})
(define_insn "clrsb<mode>2"
[(set (match_operand:GPI 0 "register_operand" "=r")
(clrsb:GPI (match_operand:GPI 1 "register_operand" "r")))]

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2017-02-07 Andrew Pinski <apinski@cavium.com>
* gcc.target/aarch64/popcount.c : New Testcase.
2017-02-07 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/79386

23
gcc/testsuite/gcc.target/aarch64/popcnt.c Normal file
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@ -0,0 +1,23 @@
/* { dg-do compile } */
/* { dg-options "-O2" } */
int
foo (int x)
{
return __builtin_popcount (x);
}
long
foo1 (long x)
{
return __builtin_popcountl (x);
}
long long
foo2 (long long x)
{
return __builtin_popcountll (x);
}
/* { dg-final { scan-assembler-not "popcount" } } */
/* { dg-final { scan-assembler-times "cnt\t" 3 } } */