From: Ilya Verbin Date: Tue, 21 Jun 2016 14:38:02 +0000 (+0000) Subject: [AVX-512ER] vrsqrt28ps auto generation X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3b9bc511ee48c7c2e868baaa48f02e7e7e115ce7;p=gcc.git [AVX-512ER] vrsqrt28ps auto generation gcc/ * config/i386/i386.c (ix86_emit_swsqrtsf): Emit vrsqrt28ps. * config/i386/sse.md (define_expand "rsqrtv16sf2"): New. gcc/testsuite/ * gcc.target/i386/avx512er-vrsqrt28ps-3.c: New test. * gcc.target/i386/avx512er-vrsqrt28ps-4.c: New test. * gcc.target/i386/avx512er-vrsqrt28ps-5.c: New test. * gcc.target/i386/avx512er-vrsqrt28ps-6.c: New test. From-SVN: r237649 --- diff --git a/gcc/ChangeLog b/gcc/ChangeLog index dacf8c16fe9..a1719d0d6cd 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2016-06-21 Ilya Verbin + + * config/i386/i386.c (ix86_emit_swsqrtsf): Emit vrsqrt28ps. + * config/i386/sse.md (define_expand "rsqrtv16sf2"): New. + 2016-06-21 Ilya Verbin * config/i386/i386.c (ix86_emit_swdivsf): Emit vrcp28ps. diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index 8139807512b..9d3610647f0 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -48774,6 +48774,24 @@ void ix86_emit_swsqrtsf (rtx res, rtx a, machine_mode mode, bool recip) e2 = gen_reg_rtx (mode); e3 = gen_reg_rtx (mode); + if (TARGET_AVX512ER && mode == V16SFmode) + { + if (recip) + /* res = rsqrt28(a) estimate */ + emit_insn (gen_rtx_SET (res, gen_rtx_UNSPEC (mode, gen_rtvec (1, a), + UNSPEC_RSQRT28))); + else + { + /* x0 = rsqrt28(a) estimate */ + emit_insn (gen_rtx_SET (x0, gen_rtx_UNSPEC (mode, gen_rtvec (1, a), + UNSPEC_RSQRT28))); + /* res = rcp28(x0) estimate */ + emit_insn (gen_rtx_SET (res, gen_rtx_UNSPEC (mode, gen_rtvec (1, x0), + UNSPEC_RCP28))); + } + return; + } + real_from_integer (&r, VOIDmode, -3, SIGNED); mthree = const_double_from_real_value (r, SFmode); diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md index 6056ddc2ee5..c1ea04ffca8 100644 --- a/gcc/config/i386/sse.md +++ b/gcc/config/i386/sse.md @@ -1559,6 +1559,17 @@ DONE; }) +(define_expand "rsqrtv16sf2" + [(set (match_operand:V16SF 0 "register_operand") + (unspec:V16SF + [(match_operand:V16SF 1 "vector_operand")] + UNSPEC_RSQRT28))] + "TARGET_SSE_MATH && TARGET_AVX512ER" +{ + ix86_emit_swsqrtsf (operands[0], operands[1], V16SFmode, true); + DONE; +}) + (define_insn "_rsqrt2" [(set (match_operand:VF1_128_256 0 "register_operand" "=x") (unspec:VF1_128_256 diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index cff25cc1979..461665e6833 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,10 @@ +2016-06-21 Ilya Verbin + + * gcc.target/i386/avx512er-vrsqrt28ps-3.c: New test. + * gcc.target/i386/avx512er-vrsqrt28ps-4.c: New test. + * gcc.target/i386/avx512er-vrsqrt28ps-5.c: New test. + * gcc.target/i386/avx512er-vrsqrt28ps-6.c: New test. + 2016-06-21 Ilya Verbin * gcc.target/i386/avx512er-vrcp28ps-3.c: New test. diff --git a/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-3.c b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-3.c new file mode 100644 index 00000000000..1ba8172d6e3 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-3.c @@ -0,0 +1,47 @@ +/* { dg-do run } */ +/* { dg-require-effective-target avx512er } */ +/* { dg-options "-O2 -ffast-math -ftree-vectorize -mavx512er" } */ + +#include +#include "avx512er-check.h" + +#define MAX 1000 +#define EPS 0.00001 + +__attribute__ ((noinline, optimize (1))) +void static +compute_rsqrt_ref (float *a, float *r) +{ + for (int i = 0; i < MAX; i++) + r[i] = 1.0 / sqrtf (a[i]); +} + +__attribute__ ((noinline)) +void static +compute_rsqrt_exp (float *a, float *r) +{ + for (int i = 0; i < MAX; i++) + r[i] = 1.0 / sqrtf (a[i]); +} + +void static +avx512er_test (void) +{ + float in[MAX]; + float ref[MAX]; + float exp[MAX]; + + for (int i = 0; i < MAX; i++) + in[i] = 8765.987 - 8.6756 * i; + + compute_rsqrt_ref (in, ref); + compute_rsqrt_exp (in, exp); + + for (int i = 0; i < MAX; i++) + { + float rel_err = (ref[i] - exp[i]) / ref[i]; + rel_err = rel_err > 0.0 ? rel_err : -rel_err; + if (rel_err > EPS) + abort (); + } +} diff --git a/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-4.c b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-4.c new file mode 100644 index 00000000000..2f5f73fd781 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-4.c @@ -0,0 +1,7 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -ffast-math -ftree-vectorize -mavx512er" } */ + +#include "avx512er-vrsqrt28ps-3.c" + +/* { dg-final { scan-assembler-times "vrsqrt28ps\[^\n\r\]*zmm\[0-9\]+(?:\n|\[ \\t\]+#)" 1 } } */ +/* { dg-final { scan-assembler-not "vrcp28ps\[^\n\r\]*zmm\[0-9\]+(?:\n|\[ \\t\]+#)" } } */ diff --git a/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-5.c b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-5.c new file mode 100644 index 00000000000..e067a81e562 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-5.c @@ -0,0 +1,47 @@ +/* { dg-do run } */ +/* { dg-require-effective-target avx512er } */ +/* { dg-options "-O2 -ffast-math -ftree-vectorize -mavx512er" } */ + +#include +#include "avx512er-check.h" + +#define MAX 1000 +#define EPS 0.00001 + +__attribute__ ((noinline, optimize (1))) +void static +compute_sqrt_ref (float *a, float *r) +{ + for (int i = 0; i < MAX; i++) + r[i] = sqrtf (a[i]); +} + +__attribute__ ((noinline)) +void static +compute_sqrt_exp (float *a, float *r) +{ + for (int i = 0; i < MAX; i++) + r[i] = sqrtf (a[i]); +} + +void static +avx512er_test (void) +{ + float in[MAX]; + float ref[MAX]; + float exp[MAX]; + + for (int i = 0; i < MAX; i++) + in[i] = 8765.987 - 8.6756 * i; + + compute_sqrt_ref (in, ref); + compute_sqrt_exp (in, exp); + + for (int i = 0; i < MAX; i++) + { + float rel_err = (ref[i] - exp[i]) / ref[i]; + rel_err = rel_err > 0.0 ? rel_err : -rel_err; + if (rel_err > EPS) + abort (); + } +} diff --git a/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-6.c b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-6.c new file mode 100644 index 00000000000..77c5cba1cef --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/avx512er-vrsqrt28ps-6.c @@ -0,0 +1,7 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -ffast-math -ftree-vectorize -mavx512er" } */ + +#include "avx512er-vrsqrt28ps-5.c" + +/* { dg-final { scan-assembler-times "vrsqrt28ps\[^\n\r\]*zmm\[0-9\]+(?:\n|\[ \\t\]+#)" 1 } } */ +/* { dg-final { scan-assembler-times "vrcp28ps\[^\n\r\]*zmm\[0-9\]+(?:\n|\[ \\t\]+#)" 1 } } */