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[8.43.85.97]) by mx.google.com with ESMTPS id b19-20020aa7dc13000000b005259d57fb82si640911edu.3.2023.08.31.00.03.48 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 31 Aug 2023 00:03:49 -0700 (PDT) Received-SPF: pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) client-ip=8.43.85.97; Authentication-Results: mx.google.com; spf=pass (google.com: domain of gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org designates 8.43.85.97 as permitted sender) smtp.mailfrom="gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org" Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id EB69638582AC for ; Thu, 31 Aug 2023 07:03:43 +0000 (GMT) X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from eggs.gnu.org (eggs.gnu.org [IPv6:2001:470:142:3::10]) by sourceware.org (Postfix) with ESMTPS id 726423858C62 for ; Thu, 31 Aug 2023 07:03:15 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 726423858C62 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: sourceware.org; spf=fail smtp.mailfrom=loongson.cn Received: from mail.loongson.cn ([114.242.206.163]) by eggs.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qbbhu-0007uq-Q9 for gcc-patches@gcc.gnu.org; Thu, 31 Aug 2023 03:03:14 -0400 Received: from loongson.cn (unknown [10.10.130.252]) by gateway (Coremail) with SMTP id _____8Cxh+gkO_Bk9lgdAA--.24419S3; Thu, 31 Aug 2023 15:03:01 +0800 (CST) Received: from slurm-master.loongson.cn (unknown [10.10.130.252]) by localhost.localdomain (Coremail) with SMTP id AQAAf8CxbSMjO_Bkr+hnAA--.5869S4; Thu, 31 Aug 2023 15:03:00 +0800 (CST) From: chenxiaolong To: gcc-patches@gcc.gnu.org Subject: [PATCH v5] LoongArch:Implement 128-bit floating point functions in gcc. Date: Thu, 31 Aug 2023 15:02:57 +0800 Message-Id: <20230831070257.16848-1-chenxiaolong@loongson.cn> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-CM-TRANSID: AQAAf8CxbSMjO_Bkr+hnAA--.5869S4 X-CM-SenderInfo: hfkh05xldrz0tqj6z05rqj20fqof0/1tbiAQAABWTwEzQAJwACsS X-Coremail-Antispam: 1Uk129KBj93XoW3ZF4kWF4rZFy7GFWUKrW5XFc_yoWDKF43pF W7Cr1FyrZ7JFs3Zw1fJ3Z5ArnxAr47Gw4xZF9xKa4jka1UXr92q3W5trW2qF15J3yrWr4I q390qay293W8A3gCm3ZEXasCq-sJn29KB7ZKAUJUUUU5529EdanIXcx71UUUUU7KY7ZEXa sCq-sGcSsGvfJ3Ic02F40EFcxC0VAKzVAqx4xG6I80ebIjqfuFe4nvWSU5nxnvy29KBjDU 0xBIdaVrnRJUUUkFb4IE77IF4wAFF20E14v26r1j6r4UM7CY07I20VC2zVCF04k26cxKx2 IYs7xG6rWj6s0DM7CIcVAFz4kK6r106r15M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48v e4kI8wA2z4x0Y4vE2Ix0cI8IcVAFwI0_JFI_Gr1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI 0_Jr0_Gr1l84ACjcxK6I8E87Iv67AKxVW8Jr0_Cr1UM28EF7xvwVC2z280aVCY1x0267AK xVW8Jr0_Cr1UM2AIxVAIcxkEcVAq07x20xvEncxIr21l57IF6xkI12xvs2x26I8E6xACxx 1l5I8CrVACY4xI64kE6c02F40Ex7xfMcIj6xIIjxv20xvE14v26r1Y6r17McIj6I8E87Iv 67AKxVWUJVW8JwAm72CE4IkC6x0Yz7v_Jr0_Gr1lF7xvr2IYc2Ij64vIr41l42xK82IYc2 Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxVWUJVWUGwC20s02 6x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI7VAKI48JMIIF0x vE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r1j6r4UMIIF0xvE 42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVWUJVW8JwCI42IY6I8E87Iv6x kF7I0E14v26r1j6r4UYxBIdaVFxhVjvjDU0xZFpf9x07j1YL9UUUUU= Received-SPF: pass client-ip=114.242.206.163; envelope-from=chenxiaolong@loongson.cn; helo=mail.loongson.cn X-Spam_score_int: -18 X-Spam_score: -1.9 X-Spam_bar: - X-Spam_report: (-1.9 / 5.0 requ) BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Status: No, score=-14.6 required=5.0 tests=BAYES_00, GIT_PATCH_0, KAM_DMARC_STATUS, KAM_SHORT, SPF_FAIL, SPF_HELO_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: 2.1.30 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: chenxiaolong , xuchenghua@loongson.cn, chenglulu@loongson.cn, i@xen0n.name Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org Sender: "Gcc-patches" X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1775727205820716028 X-GMAIL-MSGID: 1775727205820716028 Brief version history of patch set: v1 -> v2: According to the GNU code specification, adjust the format of the function implementation with "q" as the suffix function. v2 - >v3: 1.On the LoongArch architecture, refer to the functionality of 64-bit functions and modify the underlying implementation of __builtin_{nanq,nansq} functions in libgcc. 2.Modify the function's instruction template to use some instructions such as "bstrins.d" to implement the 128-bit __builtin_{fabsq,copysignq} function instead of calling libgcc library support, so as to better play the machine's performance. v3 -> v4: 1.The above v1,v2, and v3 all implement 128-bit floating-point functions with "q" as the suffix, but it is an older implementation. The v4 version completely abandoned the old implementation by associating the 128-bit floating-point function with the "q" suffix with the "f128" function that already existed in GCC. 2.Modify the code so that both "__float128" and "_Float128" function types can be supported in compiler gcc. 3.Associating a function with the suffix "q" to the "f128" function allows two different forms of the function to produce the same effect, For example, __builtin_{huge_{valq,valf128},{infq/inff128},{nanq/nanf128},{nansq/nansf128}, {fabsq/fabsf128}}. 4.For the _builtin_copysignq function, do not call the new "f128" implementation, but use the "bstrins" and other instructions in the machine description file to implement the function function, the result is that the number of assembly instructions can be reduced and the function optimization to achieve the optimal effect. v4 -> v5: Removed the v4 implementation of the __builtin_fabsf128() function added to LoongArch.md. During implementation, float128_type_node is bound with the type "__float128" so that the compiler can correctly identify the type of the function. The "q" suffix is associated with the "f128" function, which makes GCC more flexible to support different user input cases, implementing functions such as __builtin_{huge_valq,infq, fabsq, copysignq, nanq,nansq}.At the same time, the __builtin_{copysign{q/f128}} functions are optimized by using "bstrins" and other instructions on LoongArch architecture to better play the optimization performance of the compiler. gcc/ChangeLog: * config/loongarch/loongarch-builtins.cc (loongarch_init_builtins): Associate the __float128 type to float128_type_node so that it can be recognized by the compiler. * config/loongarch/loongarch-c.cc (loongarch_cpu_cpp_builtins): Add the flag "FLOAT128_TYPE" to gcc and associate a function with the suffix "q" to "f128". * config/loongarch/loongarch.md (copysigntf3):Modify the instruction template to implement the __builtin_{copysignf128} function. * doc/extend.texi:Added support for 128-bit floating-point functions on the LoongArch architecture. gcc/testsuite/ChangeLog: * gcc.target/loongarch/math-float-128.c: New test. --- gcc/config/loongarch/loongarch-builtins.cc | 5 + gcc/config/loongarch/loongarch-c.cc | 11 ++ gcc/config/loongarch/loongarch.md | 33 +++++ gcc/doc/extend.texi | 20 ++- .../gcc.target/loongarch/math-float-128.c | 115 ++++++++++++++++++ 5 files changed, 181 insertions(+), 3 deletions(-) create mode 100644 gcc/testsuite/gcc.target/loongarch/math-float-128.c diff --git a/gcc/config/loongarch/loongarch-builtins.cc b/gcc/config/loongarch/loongarch-builtins.cc index b929f224dfa..58b612bf445 100644 --- a/gcc/config/loongarch/loongarch-builtins.cc +++ b/gcc/config/loongarch/loongarch-builtins.cc @@ -256,6 +256,11 @@ loongarch_init_builtins (void) unsigned int i; tree type; + /* Register the type float128_type_node as a built-in type and + give it an alias "__float128". */ + (*lang_hooks.types.register_builtin_type) (float128_type_node, + "__float128"); + /* Iterate through all of the bdesc arrays, initializing all of the builtin functions. */ for (i = 0; i < ARRAY_SIZE (loongarch_builtins); i++) diff --git a/gcc/config/loongarch/loongarch-c.cc b/gcc/config/loongarch/loongarch-c.cc index 67911b78f28..6ffbf748316 100644 --- a/gcc/config/loongarch/loongarch-c.cc +++ b/gcc/config/loongarch/loongarch-c.cc @@ -99,6 +99,17 @@ loongarch_cpu_cpp_builtins (cpp_reader *pfile) else builtin_define ("__loongarch_frlen=0"); + /* Add support for FLOAT128_TYPE on the LoongArch architecture. */ + builtin_define ("__FLOAT128_TYPE__"); + + /* Map the old _Float128 'q' builtins into the new 'f128' builtins. */ + builtin_define ("__builtin_fabsq=__builtin_fabsf128"); + builtin_define ("__builtin_copysignq=__builtin_copysignf128"); + builtin_define ("__builtin_nanq=__builtin_nanf128"); + builtin_define ("__builtin_nansq=__builtin_nansf128"); + builtin_define ("__builtin_infq=__builtin_inff128"); + builtin_define ("__builtin_huge_valq=__builtin_huge_valf128"); + /* Native Data Sizes. */ builtin_define_with_int_value ("_LOONGARCH_SZINT", INT_TYPE_SIZE); builtin_define_with_int_value ("_LOONGARCH_SZLONG", LONG_TYPE_SIZE); diff --git a/gcc/config/loongarch/loongarch.md b/gcc/config/loongarch/loongarch.md index b37e070660f..1b72d9d2cde 100644 --- a/gcc/config/loongarch/loongarch.md +++ b/gcc/config/loongarch/loongarch.md @@ -38,6 +38,7 @@ (define_c_enum "unspec" [ UNSPEC_FMAX UNSPEC_FMIN UNSPEC_FCOPYSIGN + UNSPEC_COPYSIGNF128 UNSPEC_FTINT UNSPEC_FTINTRM UNSPEC_FTINTRP @@ -2008,6 +2009,38 @@ (define_insn "movfcc" "" "movgr2cf\t%0,$r0") +;; Implement __builtin_copysignf128 function. + +(define_insn_and_split "copysigntf3" + [(set (match_operand:TF 0 "register_operand" "=&r") + (unspec:TF [(match_operand:TF 1 "register_operand" "r") + (match_operand:TF 2 "register_operand" "r")] + UNSPEC_COPYSIGNF128))] + "TARGET_64BIT" + "#" + "reload_completed" + [(const_int 0)] +{ + rtx op0_lo = gen_rtx_REG (DImode,REGNO (operands[0]) + 0); + rtx op0_hi = gen_rtx_REG (DImode,REGNO (operands[0]) + 1); + rtx op1_lo = gen_rtx_REG (DImode,REGNO (operands[1]) + 0); + rtx op1_hi = gen_rtx_REG (DImode,REGNO (operands[1]) + 1); + rtx op2_hi = gen_rtx_REG (DImode,REGNO (operands[2]) + 1); + + if (REGNO (operands[1]) == REGNO (operands[2])) + { + loongarch_emit_move (operands[0], operands[1]); + DONE; + } + else + { + loongarch_emit_move (op0_hi, op2_hi); + loongarch_emit_move (op0_lo, op1_lo); + emit_insn (gen_insvdi (op0_hi, GEN_INT (63), GEN_INT (0), op1_hi)); + DONE; + } +}) + ;; Conditional move instructions. (define_insn "*sel_using_" diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi index 400284b85f5..074f1ee33a0 100644 --- a/gcc/doc/extend.texi +++ b/gcc/doc/extend.texi @@ -1093,10 +1093,10 @@ types. As an extension, GNU C and GNU C++ support additional floating types, which are not supported by all targets. @itemize @bullet -@item @code{__float128} is available on i386, x86_64, IA-64, and -hppa HP-UX, as well as on PowerPC GNU/Linux targets that enable +@item @code{__float128} is available on i386, x86_64, IA-64, LoongArch +and hppa HP-UX, as well as on PowerPC GNU/Linux targets that enable the vector scalar (VSX) instruction set. @code{__float128} supports -the 128-bit floating type. On i386, x86_64, PowerPC, and IA-64 +the 128-bit floating type. On i386, x86_64, PowerPC, LoongArch and IA-64, other than HP-UX, @code{__float128} is an alias for @code{_Float128}. On hppa and IA-64 HP-UX, @code{__float128} is an alias for @code{long double}. @@ -16657,6 +16657,20 @@ function you need to include @code{larchintrin.h}. void __break (imm0_32767) @end smallexample +Additional built-in functions are available for LoongArch family +processors to efficiently use 128-bit floating-point (__float128) +values. + +The following are the basic built-in functions supported. +@smallexample +__float128 __builtin_fabsq (__float128); +__float128 __builtin_copysignq (__float128, __float128); +__float128 __builtin_infq (void); +__float128 __builtin_huge_valq (void); +__float128 __builtin_nanq (void); +__float128 __builtin_nansq (void); +@end smallexample + @node MIPS DSP Built-in Functions @subsection MIPS DSP Built-in Functions diff --git a/gcc/testsuite/gcc.target/loongarch/math-float-128.c b/gcc/testsuite/gcc.target/loongarch/math-float-128.c new file mode 100644 index 00000000000..5eab3019278 --- /dev/null +++ b/gcc/testsuite/gcc.target/loongarch/math-float-128.c @@ -0,0 +1,115 @@ +/* { dg-do compile } */ +/* { dg-options " -march=loongarch64 " } */ +/* { dg-final { scan-assembler-times {bstrins.d} 6} } */ +/* { dg-final { scan-assembler-not "my_fabsq2:.*\\bl\t%plt\\(__fabsq\\).*my_fabsq2" } } */ +/* { dg-final { scan-assembler-not "my_copysignq2:.*\\bl\t%plt\\(__copysignq\\).*my_copysignq2" } } */ +/* { dg-final { scan-assembler-not "my_nanq2:.*\\bl\t%plt\\(__builtin_nanq\\).*my_nanq2" } } */ +/* { dg-final { scan-assembler-not "my_nansq2:.*\\bl\t%plt\\(__builtin_nansq\\).*my_nansq2" } } */ + +__float128 +my_fabsq1 (__float128 a) +{ + return __builtin_fabsq (a); +} + +_Float128 +my_fabsq2 (_Float128 a) +{ + return __builtin_fabsq (a); +} + +_Float128 +my_fabsf128 (_Float128 a) +{ + return __builtin_fabsf128 (a); +} + +__float128 +my_copysignq1 (__float128 a, __float128 b) +{ + return __builtin_copysignq (a, b); +} + +_Float128 +my_copysignq2 (_Float128 a, _Float128 b) +{ + return __builtin_copysignq (a, b); +} + +_Float128 +my_copysignf128 (_Float128 a, _Float128 b) +{ + return __builtin_copysignf128 (a, b); +} + +__float128 +my_infq1 (void) +{ + return __builtin_infq (); +} + +_Float128 +my_infq2 (void) +{ + return __builtin_infq (); +} + +_Float128 +my_inff128 (void) +{ + return __builtin_inff128 (); +} + +__float128 +my_huge_valq1 (void) +{ + return __builtin_huge_valq (); +} + +_Float128 +my_huge_valq2 (void) +{ + return __builtin_huge_valq (); +} + +_Float128 +my_huge_valf128 (void) +{ + return __builtin_huge_valf128 (); +} + +__float128 +my_nanq1 (void) +{ + return __builtin_nanq (""); +} + +_Float128 +my_nanq2 (void) +{ + return __builtin_nanq (""); +} + +_Float128 +my_nanf128 (void) +{ + return __builtin_nanf128 (""); +} + +__float128 +my_nansq1 (void) +{ + return __builtin_nansq (""); +} + +_Float128 +my_nansq2 (void) +{ + return __builtin_nansq (""); +} + +_Float128 +my_nansf128 (void) +{ + return __builtin_nansf128 (""); +}