From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-sender-0.a4lg.com (mail-sender.a4lg.com [153.120.152.154]) by sourceware.org (Postfix) with ESMTPS id 42EA33857016 for ; Tue, 25 Oct 2022 13:04:13 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 42EA33857016 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=irq.a4lg.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=irq.a4lg.com Received: from [127.0.0.1] (localhost [127.0.0.1]) by mail-sender-0.a4lg.com (Postfix) with ESMTPSA id 9E2A0300089; Tue, 25 Oct 2022 13:04:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=irq.a4lg.com; s=2017s01; t=1666703050; bh=XYGQba8o+sTq5wG5JlenZ6SCuuQr52AvRhmvj68Dmhg=; h=From:To:Cc:Subject:Date:Message-Id:Mime-Version: Content-Transfer-Encoding; b=WopBRuh3aZGyuwVUPY8iIC0oPRgX8mZPs3bucUF0lUTB8CBk6d5E9LKufh+3bFWTR 3dcP4ph4qIL5XGAaMWlTvwH7eXK6DgMLowEHnh6cr6hKSbImUrl+y2Tl0e4iATYaiY pUHR7nbAHoskMcFh/gYbt76z/S9PURBerOjlbSzQ= From: Tsukasa OI To: Tsukasa OI , Nelson Chu , Kito Cheng , Palmer Dabbelt Cc: binutils@sourceware.org Subject: [RFC PATCH] RISC-V: Allocate "various" operand type Date: Tue, 25 Oct 2022 13:04:02 +0000 Message-Id: <6a8e7a71acccd0efb9789dfb3edfa307e83bdaa1.1666702934.git.research_trasio@irq.a4lg.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-12.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,GIT_PATCH_0,SPF_HELO_NONE,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 commit intends to move operands that require very special handling or operand types that are so minor (e.g. only useful on a few instructions) under "W". I also intend this "W" to be "temporary" operand storage until we can find good two character (or less) operand type. In this commit, prefetch offset operand "f" for 'Zicbop' extension is moved to "Wif" because of its special handling (and allocating single character "f" for this operand type seemed too much). Current expected allocation guideline is as follows: 1. 'W' 2. The most closely related single-letter extension in lowercase (strongly recommended but not mandatory) 3. Identify operand type The author currently plans to allocate following three-character operand types (for operands including instructions from unratified extensions). 1. "Wif" ('Zicbop': fetch offset) 2. "Wfv" (unratified 'Zfa': value operand from FLI.[HSDQ] instructions) 3. "Wfm" / "WfM" 'Zfh', 'F', 'D', 'Q': rounding modes "m" with special handling solely for widening conversion instructions. gas/ChangeLog: * config/tc-riscv.c (validate_riscv_insn, riscv_ip): Move from "f" to "Wif". opcodes/ChangeLog: * riscv-dis.c (print_insn_args): Move from "f" to "Wif". * riscv-opc.c (riscv_opcodes): Reflect new operand type. --- gas/config/tc-riscv.c | 64 +++++++++++++++++++++++++++++++------------ opcodes/riscv-dis.c | 26 ++++++++++++++---- opcodes/riscv-opc.c | 6 ++-- 3 files changed, 71 insertions(+), 25 deletions(-) diff --git a/gas/config/tc-riscv.c b/gas/config/tc-riscv.c index 22385d1baa0..c3ac1d0bf60 100644 --- a/gas/config/tc-riscv.c +++ b/gas/config/tc-riscv.c @@ -1243,7 +1243,6 @@ validate_riscv_insn (const struct riscv_opcode *opc, int length) case 'j': used_bits |= ENCODE_ITYPE_IMM (-1U); break; case 'a': used_bits |= ENCODE_JTYPE_IMM (-1U); break; case 'p': used_bits |= ENCODE_BTYPE_IMM (-1U); break; - case 'f': /* Fall through. */ case 'q': used_bits |= ENCODE_STYPE_IMM (-1U); break; case 'u': used_bits |= ENCODE_UTYPE_IMM (-1U); break; case 'z': break; /* Zero immediate. */ @@ -1270,6 +1269,21 @@ validate_riscv_insn (const struct riscv_opcode *opc, int length) goto unknown_validate_operand; } break; + case 'W': /* RVI various operands. */ + switch (*++oparg) + { + case 'i': + switch (*++oparg) + { + case 'f': used_bits |= ENCODE_STYPE_IMM (-1U); break; + default: + goto unknown_validate_operand; + } + break; + default: + goto unknown_validate_operand; + } + break; case 'X': /* Integer immediate. */ { size_t n; @@ -3285,22 +3299,37 @@ riscv_ip (char *str, struct riscv_cl_insn *ip, expressionS *imm_expr, imm_expr->X_op = O_absent; continue; - case 'f': /* Prefetch offset, pseudo S-type but lower 5-bits zero. */ - if (riscv_handle_implicit_zero_offset (imm_expr, asarg)) - continue; - my_getExpression (imm_expr, asarg); - check_absolute_expr (ip, imm_expr, false); - if (((unsigned) (imm_expr->X_add_number) & 0x1fU) - || imm_expr->X_add_number >= (signed) RISCV_IMM_REACH / 2 - || imm_expr->X_add_number < -(signed) RISCV_IMM_REACH / 2) - as_bad (_("improper prefetch offset (%ld)"), - (long) imm_expr->X_add_number); - ip->insn_opcode |= - ENCODE_STYPE_IMM ((unsigned) (imm_expr->X_add_number) & - ~ 0x1fU); - imm_expr->X_op = O_absent; - asarg = expr_end; - continue; + case 'W': /* RVI various operands. */ + switch (*++oparg) + { + case 'i': + switch (*++oparg) + { + case 'f': + /* Prefetch offset for 'Zicbop' extension. + pseudo S-type but lower 5-bits zero. */ + if (riscv_handle_implicit_zero_offset (imm_expr, asarg)) + continue; + my_getExpression (imm_expr, asarg); + check_absolute_expr (ip, imm_expr, false); + if (((unsigned) (imm_expr->X_add_number) & 0x1fU) + || imm_expr->X_add_number >= RISCV_IMM_REACH / 2 + || imm_expr->X_add_number < -RISCV_IMM_REACH / 2) + as_bad (_ ("improper prefetch offset (%ld)"), + (long) imm_expr->X_add_number); + ip->insn_opcode |= ENCODE_STYPE_IMM ( + (unsigned) (imm_expr->X_add_number) & ~0x1fU); + imm_expr->X_op = O_absent; + asarg = expr_end; + continue; + default: + goto unknown_riscv_ip_operand; + } + break; + default: + goto unknown_riscv_ip_operand; + } + break; case 'X': /* Integer immediate. */ { @@ -3353,6 +3382,7 @@ riscv_ip (char *str, struct riscv_cl_insn *ip, expressionS *imm_expr, } } break; + default: unknown_riscv_ip_operand: as_fatal (_("internal: unknown argument type `%s'"), diff --git a/opcodes/riscv-dis.c b/opcodes/riscv-dis.c index daeb1b5fd15..b851bcaa8af 100644 --- a/opcodes/riscv-dis.c +++ b/opcodes/riscv-dis.c @@ -473,11 +473,6 @@ print_insn_args (const char *oparg, insn_t l, bfd_vma pc, disassemble_info *info (int)EXTRACT_STYPE_IMM (l)); break; - case 'f': - print (info->stream, dis_style_address_offset, "%d", - (int)EXTRACT_STYPE_IMM (l)); - break; - case 'a': info->target = EXTRACT_JTYPE_IMM (l) + pc; (*info->print_address_func) (info->target, info); @@ -582,6 +577,27 @@ print_insn_args (const char *oparg, insn_t l, bfd_vma pc, disassemble_info *info print (info->stream, dis_style_immediate, "%d", rs1); break; + case 'W': /* RVI various operands. */ + { + switch (*++oparg) + { + case 'i': + switch (*++oparg) + { + case 'f': + print (info->stream, dis_style_address_offset, "%d", + (int) EXTRACT_STYPE_IMM (l)); + break; + default: + goto undefined_modifier; + } + break; + default: + goto undefined_modifier; + } + } + break; + case 'X': /* Integer immediate. */ { size_t n; diff --git a/opcodes/riscv-opc.c b/opcodes/riscv-opc.c index 4029c1881b8..f3b6ca819bb 100644 --- a/opcodes/riscv-opc.c +++ b/opcodes/riscv-opc.c @@ -313,9 +313,9 @@ const struct riscv_opcode riscv_opcodes[] = /* name, xlen, isa, operands, match, mask, match_func, pinfo. */ /* Standard hints. */ -{"prefetch.i", 0, INSN_CLASS_ZICBOP, "f(s)", MATCH_PREFETCH_I, MASK_PREFETCH_I, match_opcode, 0 }, -{"prefetch.r", 0, INSN_CLASS_ZICBOP, "f(s)", MATCH_PREFETCH_R, MASK_PREFETCH_R, match_opcode, 0 }, -{"prefetch.w", 0, INSN_CLASS_ZICBOP, "f(s)", MATCH_PREFETCH_W, MASK_PREFETCH_W, match_opcode, 0 }, +{"prefetch.i", 0, INSN_CLASS_ZICBOP, "Wif(s)", MATCH_PREFETCH_I, MASK_PREFETCH_I, match_opcode, 0 }, +{"prefetch.r", 0, INSN_CLASS_ZICBOP, "Wif(s)", MATCH_PREFETCH_R, MASK_PREFETCH_R, match_opcode, 0 }, +{"prefetch.w", 0, INSN_CLASS_ZICBOP, "Wif(s)", MATCH_PREFETCH_W, MASK_PREFETCH_W, match_opcode, 0 }, {"pause", 0, INSN_CLASS_ZIHINTPAUSE, "", MATCH_PAUSE, MASK_PAUSE, match_opcode, 0 }, /* Basic RVI instructions and aliases. */ base-commit: 0f2cd53cf4f730136e2b275e8279d8bc348a9a88 -- 2.37.2