From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by sourceware.org (Postfix) with ESMTPS id B12EE3858C50 for ; Mon, 6 Nov 2023 13:04:36 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org B12EE3858C50 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=suse.de Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=suse.de ARC-Filter: OpenARC Filter v1.0.0 sourceware.org B12EE3858C50 Authentication-Results: server2.sourceware.org; arc=none smtp.remote-ip=2001:67c:2178:6::1c ARC-Seal: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1699275881; cv=none; b=wL16efmoAISWLbbsOx/9Cyj3hw3cMFcvk4C1RT0iGg3xKURq9uD9Z4jSkLTqrMbutq3heEPDqersskZhEGlc0FWk5ZExmXLseo6MJKhxENkMe47rhKBxcN/DReG3i8NYootD6ACeIHmI6Bdu6XuC7DpizGK8f+gRTDC07t/udpg= ARC-Message-Signature: i=1; a=rsa-sha256; d=sourceware.org; s=key; t=1699275881; c=relaxed/simple; bh=uX5SXeQmdMBlBNkke4ftqf27nstNKuPxkVNXk9UVTrg=; h=DKIM-Signature:DKIM-Signature:Date:From:To:Subject:Message-ID: MIME-Version; b=kwQlMR3i/MtvTJ8U6S3FiREs+I7p96m0EnbJpEWJWclmVVoxl30/YbPMlFSet3DnYmb5mB4CnKvjJEfqJ4hrYJVFx0UnqMv5LYteh2CG/SX4uXlTA9hd1ZzViNaolYovJVegYz05ebG0JPmz18jArJTiI+6rmAtCmaj9Mu2TQKU= ARC-Authentication-Results: i=1; server2.sourceware.org Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id A4A6D21B34; Mon, 6 Nov 2023 13:04:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1699275875; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=7GhQActvQBNu6VNP70hWwiaz4QR+NBLY35WXhjT/Fbc=; b=1Ow27WoTXvwRBAZmhB8b0tj+EHuJkG4zsRRkATq3E+qiMpKJNvhCsMxoKkm8E4Fy8+GLdK D1BOjLy9yiWnjf5gERklBONGt2zB4ovuo3Iw4O5wcE2l2d4dv5Ao29zIiwqbqRNlzoZCzD HkqwcY1eGqJ4MONqktGrB9bdcjCGkFA= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1699275875; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=7GhQActvQBNu6VNP70hWwiaz4QR+NBLY35WXhjT/Fbc=; b=lkSWSucltWZ6vL7fuFIqB3tj/bm5TSRi5ofnut7fsPkKywlAdkYzuV7yWP73+VfRDBmK5k 1ZG9slno17dXk1AA== Received: from wotan.suse.de (wotan.suse.de [10.160.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by relay2.suse.de (Postfix) with ESMTPS id 5EF092D017; Mon, 6 Nov 2023 13:04:35 +0000 (UTC) Date: Mon, 6 Nov 2023 13:04:35 +0000 (UTC) From: Richard Biener To: Tamar Christina cc: gcc-patches@gcc.gnu.org, nd@arm.com, jlaw@ventanamicro.com Subject: Re: [PATCH v3 2/2]middle-end match.pd: optimize fneg (fabs (x)) to copysign (x, -1) [PR109154] In-Reply-To: Message-ID: References: User-Agent: Alpine 2.22 (LSU 394 2020-01-19) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII X-Spam-Status: No, score=-10.9 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,GIT_PATCH_0,KAM_LOTSOFHASH,KAM_SHORT,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: On Mon, 6 Nov 2023, Tamar Christina wrote: > Hi All, > > This patch transforms fneg (fabs (x)) into copysign (x, -1) which is more > canonical and allows a target to expand this sequence efficiently. Such > sequences are common in scientific code working with gradients. > > There is an existing canonicalization of copysign (x, -1) to fneg (fabs (x)) > which I remove since this is a less efficient form. The testsuite is also > updated in light of this. > > Bootstrapped Regtested on aarch64-none-linux-gnu and no issues. > > Ok for master? > > Thanks, > Tamar > > gcc/ChangeLog: > > PR tree-optimization/109154 > * match.pd: Add new neg+abs rule, remove inverse copysign rule. > > gcc/testsuite/ChangeLog: > > PR tree-optimization/109154 > * gcc.dg/fold-copysign-1.c: Updated. > * gcc.dg/pr55152-2.c: Updated. > * gcc.dg/tree-ssa/abs-4.c: Updated. > * gcc.dg/tree-ssa/backprop-6.c: Updated. > * gcc.dg/tree-ssa/copy-sign-2.c: Updated. > * gcc.dg/tree-ssa/mult-abs-2.c: Updated. > * gcc.target/aarch64/fneg-abs_1.c: New test. > * gcc.target/aarch64/fneg-abs_2.c: New test. > * gcc.target/aarch64/fneg-abs_3.c: New test. > * gcc.target/aarch64/fneg-abs_4.c: New test. > * gcc.target/aarch64/sve/fneg-abs_1.c: New test. > * gcc.target/aarch64/sve/fneg-abs_2.c: New test. > * gcc.target/aarch64/sve/fneg-abs_3.c: New test. > * gcc.target/aarch64/sve/fneg-abs_4.c: New test. > > --- inline copy of patch -- > diff --git a/gcc/match.pd b/gcc/match.pd > index db95931df0672cf4ef08cca36085c3aa6831519e..7a023d510c283c43a87b1795a74761b8af979b53 100644 > --- a/gcc/match.pd > +++ b/gcc/match.pd > @@ -1106,13 +1106,11 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT) > (hypots @0 (copysigns @1 @2)) > (hypots @0 @1)))) > > -/* copysign(x, CST) -> [-]abs (x). */ > -(for copysigns (COPYSIGN_ALL) > - (simplify > - (copysigns @0 REAL_CST@1) > - (if (REAL_VALUE_NEGATIVE (TREE_REAL_CST (@1))) > - (negate (abs @0)) > - (abs @0)))) > +/* Transform fneg (fabs (X)) -> copysign (X, -1). */ > + > +(simplify > + (negate (abs @0)) > + (IFN_COPYSIGN @0 { build_minus_one_cst (type); })) You also drop (copysign, x, CST) -> abx (x) when x is not negative - I think that's still worthwhile as it has one less argument? Keeping that might also need less testsuite adjustments? Richard. > /* copysign(copysign(x, y), z) -> copysign(x, z). */ > (for copysigns (COPYSIGN_ALL) > diff --git a/gcc/testsuite/gcc.dg/fold-copysign-1.c b/gcc/testsuite/gcc.dg/fold-copysign-1.c > index f17d65c24ee4dca9867827d040fe0a404c515e7b..f9cafd14ab05f5e8ab2f6f68e62801d21c2df6a6 100644 > --- a/gcc/testsuite/gcc.dg/fold-copysign-1.c > +++ b/gcc/testsuite/gcc.dg/fold-copysign-1.c > @@ -12,5 +12,5 @@ double bar (double x) > return __builtin_copysign (x, minuszero); > } > > -/* { dg-final { scan-tree-dump-times "= -" 1 "cddce1" } } */ > -/* { dg-final { scan-tree-dump-times "= ABS_EXPR" 2 "cddce1" } } */ > +/* { dg-final { scan-tree-dump-times "__builtin_copysign" 1 "cddce1" } } */ > +/* { dg-final { scan-tree-dump-times "= ABS_EXPR" 1 "cddce1" } } */ > diff --git a/gcc/testsuite/gcc.dg/pr55152-2.c b/gcc/testsuite/gcc.dg/pr55152-2.c > index 54db0f2062da105a829d6690ac8ed9891fe2b588..605f202ed6bc7aa8fe921457b02ff0b88cc63ce6 100644 > --- a/gcc/testsuite/gcc.dg/pr55152-2.c > +++ b/gcc/testsuite/gcc.dg/pr55152-2.c > @@ -10,4 +10,5 @@ int f(int a) > return (a<-a)?a:-a; > } > > -/* { dg-final { scan-tree-dump-times "ABS_EXPR" 2 "optimized" } } */ > +/* { dg-final { scan-tree-dump-times "\.COPYSIGN" 1 "optimized" } } */ > +/* { dg-final { scan-tree-dump-times "ABS_EXPR" 1 "optimized" } } */ > diff --git a/gcc/testsuite/gcc.dg/tree-ssa/abs-4.c b/gcc/testsuite/gcc.dg/tree-ssa/abs-4.c > index 6197519faf7b55aed7bc162cd0a14dd2145210ca..e1b825f37f69ac3c4666b3a52d733368805ad31d 100644 > --- a/gcc/testsuite/gcc.dg/tree-ssa/abs-4.c > +++ b/gcc/testsuite/gcc.dg/tree-ssa/abs-4.c > @@ -9,5 +9,6 @@ long double abs_ld(long double x) { return __builtin_signbit(x) ? x : -x; } > > /* __builtin_signbit(x) ? x : -x. Should be convert into - ABS_EXP */ > /* { dg-final { scan-tree-dump-not "signbit" "optimized"} } */ > -/* { dg-final { scan-tree-dump-times "= ABS_EXPR" 3 "optimized"} } */ > -/* { dg-final { scan-tree-dump-times "= -" 3 "optimized"} } */ > +/* { dg-final { scan-tree-dump-times "= ABS_EXPR" 1 "optimized"} } */ > +/* { dg-final { scan-tree-dump-times "= -" 1 "optimized"} } */ > +/* { dg-final { scan-tree-dump-times "= \.COPYSIGN" 2 "optimized"} } */ > diff --git a/gcc/testsuite/gcc.dg/tree-ssa/backprop-6.c b/gcc/testsuite/gcc.dg/tree-ssa/backprop-6.c > index 31f05716f1498dc709cac95fa20fb5796642c77e..c3a138642d6ff7be984e91fa1343cb2718db7ae1 100644 > --- a/gcc/testsuite/gcc.dg/tree-ssa/backprop-6.c > +++ b/gcc/testsuite/gcc.dg/tree-ssa/backprop-6.c > @@ -26,5 +26,6 @@ TEST_FUNCTION (float, f) > TEST_FUNCTION (double, ) > TEST_FUNCTION (long double, l) > > -/* { dg-final { scan-tree-dump-times {Deleting[^\n]* = -} 6 "backprop" } } */ > -/* { dg-final { scan-tree-dump-times {Deleting[^\n]* = ABS_EXPR <} 3 "backprop" } } */ > +/* { dg-final { scan-tree-dump-times {Deleting[^\n]* = -} 4 "backprop" } } */ > +/* { dg-final { scan-tree-dump-times {Deleting[^\n]* = \.COPYSIGN} 2 "backprop" } } */ > +/* { dg-final { scan-tree-dump-times {Deleting[^\n]* = ABS_EXPR <} 1 "backprop" } } */ > diff --git a/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-2.c b/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-2.c > index de52c5f7c8062958353d91f5031193defc9f3f91..e5d565c4b9832c00106588ef411fbd8c292a5cad 100644 > --- a/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-2.c > +++ b/gcc/testsuite/gcc.dg/tree-ssa/copy-sign-2.c > @@ -10,4 +10,5 @@ float f1(float x) > float t = __builtin_copysignf (1.0f, -x); > return x * t; > } > -/* { dg-final { scan-tree-dump-times "ABS" 2 "optimized"} } */ > +/* { dg-final { scan-tree-dump-times "ABS" 1 "optimized"} } */ > +/* { dg-final { scan-tree-dump-times ".COPYSIGN" 1 "optimized"} } */ > diff --git a/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c b/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c > index a41f1baf25669a4fd301a586a49ba5e3c5b966ab..a22896b21c8b5a4d5d8e28bd8ae0db896e63ade0 100644 > --- a/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c > +++ b/gcc/testsuite/gcc.dg/tree-ssa/mult-abs-2.c > @@ -34,4 +34,5 @@ float i1(float x) > { > return x * (x <= 0.f ? 1.f : -1.f); > } > -/* { dg-final { scan-tree-dump-times "ABS" 8 "gimple"} } */ > +/* { dg-final { scan-tree-dump-times "ABS" 4 "gimple"} } */ > +/* { dg-final { scan-tree-dump-times "\.COPYSIGN" 4 "gimple"} } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/fneg-abs_1.c b/gcc/testsuite/gcc.target/aarch64/fneg-abs_1.c > new file mode 100644 > index 0000000000000000000000000000000000000000..f823013c3ddf6b3a266c3abfcbf2642fc2a75fa6 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/fneg-abs_1.c > @@ -0,0 +1,39 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#pragma GCC target "+nosve" > + > +#include > + > +/* > +** t1: > +** orr v[0-9]+.2s, #128, lsl #24 > +** ret > +*/ > +float32x2_t t1 (float32x2_t a) > +{ > + return vneg_f32 (vabs_f32 (a)); > +} > + > +/* > +** t2: > +** orr v[0-9]+.4s, #128, lsl #24 > +** ret > +*/ > +float32x4_t t2 (float32x4_t a) > +{ > + return vnegq_f32 (vabsq_f32 (a)); > +} > + > +/* > +** t3: > +** adrp x0, .LC[0-9]+ > +** ldr q[0-9]+, \[x0, #:lo12:.LC0\] > +** orr v[0-9]+.16b, v[0-9]+.16b, v[0-9]+.16b > +** ret > +*/ > +float64x2_t t3 (float64x2_t a) > +{ > + return vnegq_f64 (vabsq_f64 (a)); > +} > diff --git a/gcc/testsuite/gcc.target/aarch64/fneg-abs_2.c b/gcc/testsuite/gcc.target/aarch64/fneg-abs_2.c > new file mode 100644 > index 0000000000000000000000000000000000000000..141121176b309e4b2aa413dc55271a6e3c93d5e1 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/fneg-abs_2.c > @@ -0,0 +1,31 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#pragma GCC target "+nosve" > + > +#include > +#include > + > +/* > +** f1: > +** movi v[0-9]+.2s, 0x80, lsl 24 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +float32_t f1 (float32_t a) > +{ > + return -fabsf (a); > +} > + > +/* > +** f2: > +** mov x0, -9223372036854775808 > +** fmov d[0-9]+, x0 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +float64_t f2 (float64_t a) > +{ > + return -fabs (a); > +} > diff --git a/gcc/testsuite/gcc.target/aarch64/fneg-abs_3.c b/gcc/testsuite/gcc.target/aarch64/fneg-abs_3.c > new file mode 100644 > index 0000000000000000000000000000000000000000..b4652173a95d104ddfa70c497f0627a61ea89d3b > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/fneg-abs_3.c > @@ -0,0 +1,36 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#pragma GCC target "+nosve" > + > +#include > +#include > + > +/* > +** f1: > +** ... > +** ldr q[0-9]+, \[x0\] > +** orr v[0-9]+.4s, #128, lsl #24 > +** str q[0-9]+, \[x0\], 16 > +** ... > +*/ > +void f1 (float32_t *a, int n) > +{ > + for (int i = 0; i < (n & -8); i++) > + a[i] = -fabsf (a[i]); > +} > + > +/* > +** f2: > +** ... > +** ldr q[0-9]+, \[x0\] > +** orr v[0-9]+.16b, v[0-9]+.16b, v[0-9]+.16b > +** str q[0-9]+, \[x0\], 16 > +** ... > +*/ > +void f2 (float64_t *a, int n) > +{ > + for (int i = 0; i < (n & -8); i++) > + a[i] = -fabs (a[i]); > +} > diff --git a/gcc/testsuite/gcc.target/aarch64/fneg-abs_4.c b/gcc/testsuite/gcc.target/aarch64/fneg-abs_4.c > new file mode 100644 > index 0000000000000000000000000000000000000000..10879dea74462d34b26160eeb0bd54ead063166b > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/fneg-abs_4.c > @@ -0,0 +1,39 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#pragma GCC target "+nosve" > + > +#include > + > +/* > +** negabs: > +** mov x0, -9223372036854775808 > +** fmov d[0-9]+, x0 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +double negabs (double x) > +{ > + unsigned long long y; > + memcpy (&y, &x, sizeof(double)); > + y = y | (1UL << 63); > + memcpy (&x, &y, sizeof(double)); > + return x; > +} > + > +/* > +** negabsf: > +** movi v[0-9]+.2s, 0x80, lsl 24 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +float negabsf (float x) > +{ > + unsigned int y; > + memcpy (&y, &x, sizeof(float)); > + y = y | (1U << 31); > + memcpy (&x, &y, sizeof(float)); > + return x; > +} > + > diff --git a/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_1.c b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_1.c > new file mode 100644 > index 0000000000000000000000000000000000000000..0c7664e6de77a497682952653ffd417453854d52 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_1.c > @@ -0,0 +1,37 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#include > + > +/* > +** t1: > +** orr v[0-9]+.2s, #128, lsl #24 > +** ret > +*/ > +float32x2_t t1 (float32x2_t a) > +{ > + return vneg_f32 (vabs_f32 (a)); > +} > + > +/* > +** t2: > +** orr v[0-9]+.4s, #128, lsl #24 > +** ret > +*/ > +float32x4_t t2 (float32x4_t a) > +{ > + return vnegq_f32 (vabsq_f32 (a)); > +} > + > +/* > +** t3: > +** adrp x0, .LC[0-9]+ > +** ldr q[0-9]+, \[x0, #:lo12:.LC0\] > +** orr v[0-9]+.16b, v[0-9]+.16b, v[0-9]+.16b > +** ret > +*/ > +float64x2_t t3 (float64x2_t a) > +{ > + return vnegq_f64 (vabsq_f64 (a)); > +} > diff --git a/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_2.c b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_2.c > new file mode 100644 > index 0000000000000000000000000000000000000000..a60cd31b9294af2dac69eed1c93f899bd5c78fca > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_2.c > @@ -0,0 +1,29 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#include > +#include > + > +/* > +** f1: > +** movi v[0-9]+.2s, 0x80, lsl 24 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +float32_t f1 (float32_t a) > +{ > + return -fabsf (a); > +} > + > +/* > +** f2: > +** mov x0, -9223372036854775808 > +** fmov d[0-9]+, x0 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +float64_t f2 (float64_t a) > +{ > + return -fabs (a); > +} > diff --git a/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_3.c b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_3.c > new file mode 100644 > index 0000000000000000000000000000000000000000..1bf34328d8841de8e6b0a5458562a9f00e31c275 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_3.c > @@ -0,0 +1,34 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#include > +#include > + > +/* > +** f1: > +** ... > +** ld1w z[0-9]+.s, p[0-9]+/z, \[x0, x2, lsl 2\] > +** orr z[0-9]+.s, z[0-9]+.s, #0x80000000 > +** st1w z[0-9]+.s, p[0-9]+, \[x0, x2, lsl 2\] > +** ... > +*/ > +void f1 (float32_t *a, int n) > +{ > + for (int i = 0; i < (n & -8); i++) > + a[i] = -fabsf (a[i]); > +} > + > +/* > +** f2: > +** ... > +** ld1d z[0-9]+.d, p[0-9]+/z, \[x0, x2, lsl 3\] > +** orr z[0-9]+.d, z[0-9]+.d, #0x8000000000000000 > +** st1d z[0-9]+.d, p[0-9]+, \[x0, x2, lsl 3\] > +** ... > +*/ > +void f2 (float64_t *a, int n) > +{ > + for (int i = 0; i < (n & -8); i++) > + a[i] = -fabs (a[i]); > +} > diff --git a/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_4.c b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_4.c > new file mode 100644 > index 0000000000000000000000000000000000000000..21f2a8da2a5d44e3d01f6604ca7be87e3744d494 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/sve/fneg-abs_4.c > @@ -0,0 +1,37 @@ > +/* { dg-do compile } */ > +/* { dg-options "-O3" } */ > +/* { dg-final { check-function-bodies "**" "" "" { target lp64 } } } */ > + > +#include > + > +/* > +** negabs: > +** mov x0, -9223372036854775808 > +** fmov d[0-9]+, x0 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +double negabs (double x) > +{ > + unsigned long long y; > + memcpy (&y, &x, sizeof(double)); > + y = y | (1UL << 63); > + memcpy (&x, &y, sizeof(double)); > + return x; > +} > + > +/* > +** negabsf: > +** movi v[0-9]+.2s, 0x80, lsl 24 > +** orr v[0-9]+.8b, v[0-9]+.8b, v[0-9]+.8b > +** ret > +*/ > +float negabsf (float x) > +{ > + unsigned int y; > + memcpy (&y, &x, sizeof(float)); > + y = y | (1U << 31); > + memcpy (&x, &y, sizeof(float)); > + return x; > +} > + > > > > > -- Richard Biener SUSE Software Solutions Germany GmbH, Frankenstrasse 146, 90461 Nuernberg, Germany; GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)