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https://github.com/netwide-assembler/nasm.git
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f114a6276e
Macroize and update more instruction patterns. Begin organizing the instructions by functional groups. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
101 lines
3.2 KiB
C
101 lines
3.2 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2024 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* common.c - code common to nasm and ndisasm
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*/
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#include "compiler.h"
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#include "nasm.h"
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#include "nasmlib.h"
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#include "insns.h"
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/*
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* The current bit size of the CPU
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*/
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int globalbits = 0;
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/*
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* Name of a register token, if applicable; otherwise NULL
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*/
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const char *register_name(int token)
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{
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if (is_register(token))
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return nasm_reg_names[token - EXPR_REG_START];
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else
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return NULL;
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}
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/*
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* Common list of prefix names; ideally should be auto-generated
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* from tokens.dat. This MUST match the enum in include/nasm.h.
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*/
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const char *prefix_name(int token)
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{
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static const char * const
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prefix_names[PREFIX_ENUM_LIMIT - PREFIX_ENUM_START] = {
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"a16", "a32", "a64", "asp", "lock", "o16", "o32", "o64", "osp",
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"rep", "repe", "repne", "repnz", "repz", "wait",
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"xacquire", "xrelease", "bnd", "nobnd", "{rex}", "{rex2}",
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"{evex}", "{vex}", "{vex3}", "{vex2}", "{nf}", "{zu}"
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};
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const char *name;
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/* A register can also be a prefix */
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name = register_name(token);
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if (!name) {
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const unsigned int prefix = token - PREFIX_ENUM_START;
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if (prefix < ARRAY_SIZE(prefix_names))
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name = prefix_names[prefix];
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}
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return name;
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}
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/*
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* True for a valid hinting-NOP opcode, after 0F.
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*/
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bool is_hint_nop(uint64_t op)
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{
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if (op >> 16)
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return false;
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if ((op >> 8) == 0x0f)
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op = (uint8_t)op;
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else if (op >> 8)
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return false;
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return ((op & ~7) == 0x18) || (op == 0x0d);
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}
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