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/* insns.h header file for insns.c
*
* The Netwide Assembler is copyright (C) 1996 Simon Tatham and
* Julian Hall. All rights reserved. The software is
* redistributable under the licence given in the file "Licence"
* distributed in the NASM archive.
*/
#ifndef NASM_INSNS_H
#define NASM_INSNS_H
struct itemplate {
int opcode; /* the token, passed from "parser.c" */
int operands; /* number of operands */
long opd[3]; /* bit flags for operand types */
char *code; /* the code it assembles to */
int flags; /* some flags */
};
/*
* Instruction template flags. These specify which processor
* targets the instruction is eligible for, whether it is
* privileged or undocumented, and also specify extra error
* checking on the matching of the instruction.
*
* IF_SM stands for Size Match: any operand whose size is not
* explicitly specified by the template is `really' intended to be
* the same size as the first size-specified operand.
* Non-specification is tolerated in the input instruction, but
* _wrong_ specification is not.
*
* IF_SM2 invokes Size Match on only the first _two_ operands, for
* three-operand instructions such as SHLD: it implies that the
* first two operands must match in size, but that the third is
* required to be _unspecified_.
*
* IF_SB invokes Size Byte: operands with unspecified size in the
* template are really bytes, and so no non-byte specification in
* the input instruction will be tolerated. IF_SW similarly invokes
* Size Word, and IF_SD invokes Size Doubleword.
*
* (The default state if neither IF_SM nor IF_SM2 is specified is
* that any operand with unspecified size in the template is
* required to have unspecified size in the instruction too...)
*/
#define IF_SM 0x0001 /* size match */
#define IF_SM2 0x0002 /* size match first two operands */
#define IF_SB 0x0004 /* unsized operands can't be non-byte */
#define IF_SW 0x0008 /* unsized operands can't be non-word */
#define IF_SD 0x0010 /* unsized operands can't be nondword */
#define IF_8086 0x0000 /* 8086 instruction */
#define IF_186 0x0100 /* 186+ instruction */
#define IF_286 0x0200 /* 286+ instruction */
#define IF_386 0x0300 /* 386+ instruction */
#define IF_486 0x0400 /* 486+ instruction */
#define IF_PENT 0x0500 /* Pentium instruction */
#define IF_P6 0x0600 /* P6 instruction */
#define IF_PMASK 0x0F00 /* the mask for processor types */
#define IF_PRIV 0x1000 /* it's a privileged instruction */
#define IF_UNDOC 0x2000 /* it's an undocumented instruction */
#define IF_FPU 0x4000 /* it's an FPU instruction */
#define IF_MMX 0x8000 /* it's an MMX instruction */
#endif
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