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Mon, 24 Aug 2026 04:03:44 -0700 (PDT) Received: from localhost.localdomain ([2407:c800:3620:e800:7910:9280:8105:5a2]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-cc199e4b125sm890517a12.20.2026.08.24.04.03.42 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 24 Aug 2026 04:03:43 -0700 (PDT) Message-ID: <8fc2ea33c1887e63c5b87edfdadbd0fbd1192f9b.camel@gmail.com> Subject: Ping^1 Re: [SH] Fix mac.w insn simulation for SH2 and above From: Oleg Endo To: gdb-patches@sourceware.org Date: Mon, 24 Aug 2026 20:03:41 +0900 In-Reply-To: References: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.54.3 (3.54.3-2.fc41) MIME-Version: 1.0 X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org Ping On Sun, 2026-08-02 at 22:53 +0900, Oleg Endo wrote: > Hi, >=20 > The simulator currently implements only the SH1 version of the mac.w > instruction. On SH1 the MACH:MACL accumulator register is only 42-bit. = It > was extended to 64-bit on SH2 and every variant that followed after. >=20 > The issue probably never showed up because GCC hasn't been able to emit t= he > SH integer mac instructions. I ran into this because I was trying to do > exactly that and while running some tests on sh-sim. >=20 > The attached patch uses the bfd_mach field to distinguish between SH1 and > not-SH1 in the simulation of the mac.w instruction, in a similar way as i= t's > already been done for some SH2A instructions. >=20 >=20 > OK to commit & push? >=20 > Best regards, > Oleg Endo