From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:40328) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ewvFH-0007Tm-6E for qemu-devel@nongnu.org; Fri, 16 Mar 2018 15:42:32 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ewvFF-0003mC-49 for qemu-devel@nongnu.org; Fri, 16 Mar 2018 15:42:31 -0400 Received: from mail-pf0-x241.google.com ([2607:f8b0:400e:c00::241]:38196) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1ewvFE-0003lt-U8 for qemu-devel@nongnu.org; Fri, 16 Mar 2018 15:42:29 -0400 Received: by mail-pf0-x241.google.com with SMTP id d26so4547801pfn.5 for ; Fri, 16 Mar 2018 12:42:28 -0700 (PDT) From: Michael Clark Date: Fri, 16 Mar 2018 12:41:09 -0700 Message-Id: <1521229281-73637-13-git-send-email-mjc@sifive.com> In-Reply-To: <1521229281-73637-1-git-send-email-mjc@sifive.com> References: <1521229281-73637-1-git-send-email-mjc@sifive.com> Subject: [Qemu-devel] [PATCH v3 12/24] RISC-V: Update E order and I extension order List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: patches@groups.riscv.org, Michael Clark , Sagar Karandikar , Bastian Koppelmann , Palmer Dabbelt Section 22.8 Subset Naming Convention of the RISC-V ISA Specification defines the canonical order for extensions in the ISA string. It is silent on the position of the E extension however E is a substitute for I so it must come early in the extension list order. A comment is added to state E and I are mutually exclusive, as the E extension will be added to the RISC-V port in the future. Cc: Sagar Karandikar Cc: Bastian Koppelmann Signed-off-by: Michael Clark Signed-off-by: Palmer Dabbelt --- target/riscv/cpu.c | 2 +- target/riscv/cpu.h | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c index 4851890..d2ae56a 100644 --- a/target/riscv/cpu.c +++ b/target/riscv/cpu.c @@ -26,7 +26,7 @@ /* RISC-V CPU definitions */ -static const char riscv_exts[26] = "IMAFDQECLBJTPVNSUHKORWXYZG"; +static const char riscv_exts[26] = "IEMAFDQCLBJTPVNSUHKORWXYZG"; const char * const riscv_int_regnames[] = { "zero", "ra ", "sp ", "gp ", "tp ", "t0 ", "t1 ", "t2 ", diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h index cff02a2..3a0ca2f 100644 --- a/target/riscv/cpu.h +++ b/target/riscv/cpu.h @@ -71,6 +71,7 @@ #define RV(x) ((target_ulong)1 << (x - 'A')) #define RVI RV('I') +#define RVE RV('E') /* E and I are mutually exclusive */ #define RVM RV('M') #define RVA RV('A') #define RVF RV('F') -- 2.7.0