From patchwork Wed Nov 9 13:53:28 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xi Ruoyao X-Patchwork-Id: 1701755 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=2620:52:3:1:0:246e:9693:128c; helo=sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=paN1dd6q; dkim-atps=neutral Received: from sourceware.org (server2.sourceware.org [IPv6:2620:52:3:1:0:246e:9693:128c]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4N6mfq2fTYz1yqS for ; Thu, 10 Nov 2022 00:54:27 +1100 (AEDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id DBAA03887F73 for ; Wed, 9 Nov 2022 13:54:24 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org DBAA03887F73 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1668002064; bh=/HhmholP03x/SwIqP1eH4tGwCqOJIPT08IEWtpb7FLM=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=paN1dd6qoV0jAMvAaJX382sJx7oZYV/DJ8y8NKH5XT3JcnC98jLHCl7Pn1MQR+ED1 OMadfEDmgyE/UjcgSqJ2SzU6zvPrN3vafkmBVZ9KUk6T1PnxhH/g9OlARB2+qGr4NS c4fR0NxSoWAQzbGT7Z8IxLDnoAVmDmB+Px+6XICs= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from xry111.site (xry111.site [IPv6:2001:470:683e::1]) by sourceware.org (Postfix) with ESMTPS id 60E123858C2F for ; Wed, 9 Nov 2022 13:54:03 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 60E123858C2F Received: from xry111-x57s1.. (unknown [IPv6:240e:358:113a:1300:dc73:854d:832e:2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (Client did not present a certificate) (Authenticated sender: xry111@xry111.site) by xry111.site (Postfix) with ESMTPSA id 5E47B66887; Wed, 9 Nov 2022 08:53:55 -0500 (EST) To: gcc-patches@gcc.gnu.org Cc: Lulu Cheng , Wang Xuerui , Chenghua Xu , Xiaolin Tang , Xi Ruoyao Subject: [PATCH v2 3/4] LoongArch: Add fscaleb.{s, d} instructions as ldexp{sf, df}3 Date: Wed, 9 Nov 2022 21:53:28 +0800 Message-Id: <20221109135329.952128-4-xry111@xry111.site> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221109135329.952128-1-xry111@xry111.site> References: <20221109135329.952128-1-xry111@xry111.site> MIME-Version: 1.0 X-Spam-Status: No, score=-7.1 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FROM_SUSPICIOUS_NTLD, GIT_PATCH_0, KAM_NUMSUBJECT, KAM_SHORT, LIKELY_SPAM_FROM, PDS_OTHER_BAD_TLD, SPF_HELO_PASS, SPF_PASS, TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Xi Ruoyao via Gcc-patches From: Xi Ruoyao Reply-To: Xi Ruoyao Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" This allows optimizing __builtin_ldexp{,f} and __builtin_scalbn{,f} with -fno-math-errno. IMODE is added because we can't hard code SI for operand 2: fscaleb.d instruction always take the high half of both source registers into account. See my_ldexp_long in the test case. gcc/ChangeLog: * config/loongarch/loongarch.md (UNSPEC_FSCALEB): New unspec. (type): Add fscaleb. (IMODE): New mode attr. (ldexp3): New instruction template. gcc/testsuite/ChangeLog: * gcc.target/loongarch/fscaleb.c: New test. --- gcc/config/loongarch/loongarch.md | 26 ++++++++++- gcc/testsuite/gcc.target/loongarch/fscaleb.c | 48 ++++++++++++++++++++ 2 files changed, 72 insertions(+), 2 deletions(-) create mode 100644 gcc/testsuite/gcc.target/loongarch/fscaleb.c diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md index eb127c346a3..c141c9adde2 100644 --- a/gcc/config/loongarch/loongarch.md +++ b/gcc/config/loongarch/loongarch.md @@ -41,6 +41,7 @@ (define_c_enum "unspec" [ UNSPEC_FTINT UNSPEC_FTINTRM UNSPEC_FTINTRP + UNSPEC_FSCALEB ;; Override return address for exception handling. UNSPEC_EH_RETURN @@ -220,6 +221,7 @@ (define_attr "qword_mode" "no,yes" ;; fcmp floating point compare ;; fcopysign floating point copysign ;; fcvt floating point convert +;; fscaleb floating point scale ;; fsqrt floating point square root ;; frsqrt floating point reciprocal square root ;; multi multiword sequence (or user asm statements) @@ -231,8 +233,8 @@ (define_attr "type" "unknown,branch,jump,call,load,fpload,fpidxload,store,fpstore,fpidxstore, prefetch,prefetchx,condmove,mgtf,mftg,const,arith,logical, shift,slt,signext,clz,trap,imul,idiv,move, - fmove,fadd,fmul,fmadd,fdiv,frdiv,fabs,fneg,fcmp,fcopysign,fcvt,fsqrt, - frsqrt,accext,accmod,multi,atomic,syncloop,nop,ghost" + fmove,fadd,fmul,fmadd,fdiv,frdiv,fabs,fneg,fcmp,fcopysign,fcvt,fscaleb, + fsqrt,frsqrt,accext,accmod,multi,atomic,syncloop,nop,ghost" (cond [(eq_attr "jirl" "!unset") (const_string "call") (eq_attr "got" "load") (const_string "load") @@ -418,6 +420,10 @@ (define_mode_attr UNITMODE [(SF "SF") (DF "DF")]) ;; the controlling mode. (define_mode_attr HALFMODE [(DF "SI") (DI "SI") (TF "DI")]) +;; This attribute gives the integer mode that has the same size of a +;; floating-point mode. +(define_mode_attr IMODE [(SF "SI") (DF "DI")]) + ;; This code iterator allows signed and unsigned widening multiplications ;; to use the same template. (define_code_iterator any_extend [sign_extend zero_extend]) @@ -1014,7 +1020,23 @@ (define_insn "copysign3" "fcopysign.\t%0,%1,%2" [(set_attr "type" "fcopysign") (set_attr "mode" "")]) + +;; +;; .................... +;; +;; FLOATING POINT SCALE +;; +;; .................... +(define_insn "ldexp3" + [(set (match_operand:ANYF 0 "register_operand" "=f") + (unspec:ANYF [(match_operand:ANYF 1 "register_operand" "f") + (match_operand: 2 "register_operand" "f")] + UNSPEC_FSCALEB))] + "TARGET_HARD_FLOAT" + "fscaleb.\t%0,%1,%2" + [(set_attr "type" "fscaleb") + (set_attr "mode" "")]) ;; ;; ................... diff --git a/gcc/testsuite/gcc.target/loongarch/fscaleb.c b/gcc/testsuite/gcc.target/loongarch/fscaleb.c new file mode 100644 index 00000000000..f18470fbb8f --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/fscaleb.c @@ -0,0 +1,48 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -mabi=lp64d -mdouble-float -fno-math-errno" } */ +/* { dg-final { scan-assembler-times "fscaleb\\.s" 3 } } */ +/* { dg-final { scan-assembler-times "fscaleb\\.d" 4 } } */ +/* { dg-final { scan-assembler-times "slli\\.w" 1 } } */ + +double +my_scalbln (double a, long b) +{ + return __builtin_scalbln (a, b); +} + +double +my_scalbn (double a, int b) +{ + return __builtin_scalbn (a, b); +} + +double +my_ldexp (double a, int b) +{ + return __builtin_ldexp (a, b); +} + +float +my_scalblnf (float a, long b) +{ + return __builtin_scalblnf (a, b); +} + +float +my_scalbnf (float a, int b) +{ + return __builtin_scalbnf (a, b); +} + +float +my_ldexpf (float a, int b) +{ + return __builtin_ldexpf (a, b); +} + +/* b must be sign-extended */ +double +my_ldexp_long (double a, long b) +{ + return __builtin_ldexp (a, b); +}