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Rozycki" To: gcc-patches@gcc.gnu.org cc: Andrew Waterman , Jim Wilson , Kito Cheng , Palmer Dabbelt Subject: [PATCH 33/44] RISC-V: Also allow FP conditions in `riscv_expand_conditional_move' In-Reply-To: Message-ID: References: User-Agent: Alpine 2.20 (DEB 67 2015-01-07) MIME-Version: 1.0 X-Spam-Status: No, score=-1.7 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_PASS, TXREP, T_SCC_BODY_TEXT_LINE, URIBL_BLACK autolearn=no 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: , Errors-To: gcc-patches-bounces+ouuuleilei=gmail.com@gcc.gnu.org X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1782969861589643256 X-GMAIL-MSGID: 1782969861589643256 In `riscv_expand_conditional_move' we only let integer conditions through at the moment, even though code has already been prepared to handle floating-point conditions as well. Lift this restriction and only bail out if a non-word-mode integer condition has been requested, as we cannot handle this specific case owing to machine instruction set restriction. We already take care of the non-integer, non-floating-point case later on. gcc/ * config/riscv/riscv.cc (riscv_expand_conditional_move): Don't bail out in floating-point conditions. --- gcc/config/riscv/riscv.cc | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) gcc-riscv-expand-conditional-move-fp.diff Index: gcc/gcc/config/riscv/riscv.cc =================================================================== --- gcc.orig/gcc/config/riscv/riscv.cc +++ gcc/gcc/config/riscv/riscv.cc @@ -4109,12 +4109,12 @@ riscv_expand_conditional_move (rtx dest, machine_mode mode0 = GET_MODE (op0); machine_mode mode1 = GET_MODE (op1); - /* The comparison must be comparing WORD_MODE objects. We must - enforce that so that we don't strip away a sign_extension + /* An integer comparison must be comparing WORD_MODE objects. We + must enforce that so that we don't strip away a sign_extension thinking it is unnecessary. We might consider using riscv_extend_operands if they are not already properly extended. */ - if ((mode0 != word_mode && mode0 != VOIDmode) - || (mode1 != word_mode && mode1 != VOIDmode)) + if ((INTEGRAL_MODE_P (mode0) && mode0 != word_mode) + || (INTEGRAL_MODE_P (mode1) && mode1 != word_mode)) return false; /* In the fallback generic case use MODE rather than WORD_MODE for