From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from xry111.site (xry111.site [IPv6:2001:470:683e::1]) by sourceware.org (Postfix) with ESMTPS id 21FDB3858D3C for ; Wed, 9 Nov 2022 07:22:47 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 21FDB3858D3C Authentication-Results: sourceware.org; dmarc=pass (p=reject dis=none) header.from=xry111.site Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=xry111.site DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=xry111.site; s=default; t=1667978564; bh=hHAeRwFFK6H9WzagKxAEz6kVsJ2KfJwxg481hcjjFbE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=QSfaPAUl8bBIXUFyYtv0XWnDBZfpzqkG2IQf5I86FlPXD9yiMA0/H9l74hcwZ2Do3 0qx9REuLoSzKSjX6jw18a1Rb1brf3I4Qbu+9TU3Ztkq/eNUkCp05MgaNNoemie55jS 7mjxcKkBgaWA7c4iW9gQQuq7PXjvi1Zo+7h8vHKM= 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 0424365DCC; Wed, 9 Nov 2022 02:22:40 -0500 (EST) From: Xi Ruoyao To: gcc-patches@gcc.gnu.org Cc: Lulu Cheng , Wang Xuerui , Chenghua Xu , Xiaolin Tang , Xi Ruoyao Subject: [PATCH 3/4] LoongArch: Add fscaleb.{s,d} instructions as ldexp{sf,df}3 Date: Wed, 9 Nov 2022 15:21:46 +0800 Message-Id: <20221109072147.789090-4-xry111@xry111.site> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221109072147.789090-1-xry111@xry111.site> References: <20221109072147.789090-1-xry111@xry111.site> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 List-Id: 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 35cef272060..9070ac4e2f8 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]) @@ -1011,7 +1017,23 @@ (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); +} -- 2.38.1