asm.h revision 1.1.6.2
1 1.1.6.2 simonb /* $NetBSD: asm.h,v 1.1.6.2 2006/04/22 11:37:36 simonb Exp $ */ 2 1.1.6.2 simonb 3 1.1.6.2 simonb /* - 4 1.1.6.2 simonb * Copyright (c) 1991,1990,1989,1994,1995,1996 Carnegie Mellon University 5 1.1.6.2 simonb * All Rights Reserved. 6 1.1.6.2 simonb * 7 1.1.6.2 simonb * Permission to use, copy, modify and distribute this software and its 8 1.1.6.2 simonb * documentation is hereby granted, provided that both the copyright 9 1.1.6.2 simonb * notice and this permission notice appear in all copies of the 10 1.1.6.2 simonb * software, derivative works or modified versions, and any portions 11 1.1.6.2 simonb * thereof, and that both notices appear in supporting documentation. 12 1.1.6.2 simonb * 13 1.1.6.2 simonb * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 14 1.1.6.2 simonb * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR 15 1.1.6.2 simonb * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 16 1.1.6.2 simonb * 17 1.1.6.2 simonb * Carnegie Mellon requests users of this software to return to 18 1.1.6.2 simonb * 19 1.1.6.2 simonb * Software Distribution Coordinator or Software.Distribution (at) CS.CMU.EDU 20 1.1.6.2 simonb * School of Computer Science 21 1.1.6.2 simonb * Carnegie Mellon University 22 1.1.6.2 simonb * Pittsburgh PA 15213-3890 23 1.1.6.2 simonb * 24 1.1.6.2 simonb * any improvements or extensions that they make and grant Carnegie Mellon 25 1.1.6.2 simonb * the rights to redistribute these changes. 26 1.1.6.2 simonb */ 27 1.1.6.2 simonb 28 1.1.6.2 simonb /* 29 1.1.6.2 simonb * Assembly coding style 30 1.1.6.2 simonb * 31 1.1.6.2 simonb * This file contains macros and register defines to 32 1.1.6.2 simonb * aid in writing more readable assembly code. 33 1.1.6.2 simonb * Some rules to make assembly code understandable by 34 1.1.6.2 simonb * a debugger are also noted. 35 1.1.6.2 simonb */ 36 1.1.6.2 simonb 37 1.1.6.2 simonb /* 38 1.1.6.2 simonb * Macro to make a local label name. 39 1.1.6.2 simonb */ 40 1.1.6.2 simonb #define LLABEL(name,num) L ## name ## num 41 1.1.6.2 simonb 42 1.1.6.2 simonb /* 43 1.1.6.2 simonb * MCOUNT 44 1.1.6.2 simonb */ 45 1.1.6.2 simonb #if defined(GPROF) 46 1.1.6.2 simonb #define MCOUNT \ 47 1.1.6.2 simonb alloc out0 = ar.pfs, 8, 0, 4, 0; \ 48 1.1.6.2 simonb mov out1 = r1; \ 49 1.1.6.2 simonb mov out2 = b0;; \ 50 1.1.6.2 simonb mov out3 = r0; \ 51 1.1.6.2 simonb br.call.sptk b0 = _mcount;; 52 1.1.6.2 simonb #else 53 1.1.6.2 simonb #define MCOUNT /* nothing */ 54 1.1.6.2 simonb #endif 55 1.1.6.2 simonb 56 1.1.6.2 simonb /* 57 1.1.6.2 simonb * ENTRY 58 1.1.6.2 simonb * Declare a global leaf function. 59 1.1.6.2 simonb * A leaf function does not call other functions. 60 1.1.6.2 simonb */ 61 1.1.6.2 simonb #define ENTRY(_name_, _n_args_) \ 62 1.1.6.2 simonb .global _name_; \ 63 1.1.6.2 simonb .align 16; \ 64 1.1.6.2 simonb .proc _name_; \ 65 1.1.6.2 simonb _name_:; \ 66 1.1.6.2 simonb .regstk _n_args_, 0, 0, 0; \ 67 1.1.6.2 simonb MCOUNT 68 1.1.6.2 simonb 69 1.1.6.2 simonb #define ENTRY_NOPROFILE(_name_, _n_args_) \ 70 1.1.6.2 simonb .global _name_; \ 71 1.1.6.2 simonb .align 16; \ 72 1.1.6.2 simonb .proc _name_; \ 73 1.1.6.2 simonb _name_:; \ 74 1.1.6.2 simonb .regstk _n_args_, 0, 0, 0 75 1.1.6.2 simonb 76 1.1.6.2 simonb /* 77 1.1.6.2 simonb * STATIC_ENTRY 78 1.1.6.2 simonb * Declare a local leaf function. 79 1.1.6.2 simonb */ 80 1.1.6.2 simonb #define STATIC_ENTRY(_name_, _n_args_) \ 81 1.1.6.2 simonb .align 16; \ 82 1.1.6.2 simonb .proc _name_; \ 83 1.1.6.2 simonb _name_:; \ 84 1.1.6.2 simonb .regstk _n_args_, 0, 0, 0 \ 85 1.1.6.2 simonb MCOUNT 86 1.1.6.2 simonb /* 87 1.1.6.2 simonb * XENTRY 88 1.1.6.2 simonb * Global alias for a leaf function, or alternate entry point 89 1.1.6.2 simonb */ 90 1.1.6.2 simonb #define XENTRY(_name_) \ 91 1.1.6.2 simonb .globl _name_; \ 92 1.1.6.2 simonb _name_: 93 1.1.6.2 simonb 94 1.1.6.2 simonb /* 95 1.1.6.2 simonb * STATIC_XENTRY 96 1.1.6.2 simonb * Local alias for a leaf function, or alternate entry point 97 1.1.6.2 simonb */ 98 1.1.6.2 simonb #define STATIC_XENTRY(_name_) \ 99 1.1.6.2 simonb _name_: 100 1.1.6.2 simonb 101 1.1.6.2 simonb 102 1.1.6.2 simonb /* 103 1.1.6.2 simonb * END 104 1.1.6.2 simonb * Function delimiter 105 1.1.6.2 simonb */ 106 1.1.6.2 simonb #define END(_name_) \ 107 1.1.6.2 simonb .endp _name_ 108 1.1.6.2 simonb 109 1.1.6.2 simonb 110 1.1.6.2 simonb /* 111 1.1.6.2 simonb * EXPORT 112 1.1.6.2 simonb * Export a symbol 113 1.1.6.2 simonb */ 114 1.1.6.2 simonb #define EXPORT(_name_) \ 115 1.1.6.2 simonb .global _name_; \ 116 1.1.6.2 simonb _name_: 117 1.1.6.2 simonb 118 1.1.6.2 simonb 119 1.1.6.2 simonb /* 120 1.1.6.2 simonb * IMPORT 121 1.1.6.2 simonb * Make an external name visible, typecheck the size 122 1.1.6.2 simonb */ 123 1.1.6.2 simonb #define IMPORT(_name_, _size_) \ 124 1.1.6.2 simonb /* .extern _name_,_size_ */ 125 1.1.6.2 simonb 126 1.1.6.2 simonb 127 1.1.6.2 simonb /* 128 1.1.6.2 simonb * ABS 129 1.1.6.2 simonb * Define an absolute symbol 130 1.1.6.2 simonb */ 131 1.1.6.2 simonb #define ABS(_name_, _value_) \ 132 1.1.6.2 simonb .globl _name_; \ 133 1.1.6.2 simonb _name_ = _value_ 134 1.1.6.2 simonb 135 1.1.6.2 simonb 136 1.1.6.2 simonb /* 137 1.1.6.2 simonb * BSS 138 1.1.6.2 simonb * Allocate un-initialized space for a global symbol 139 1.1.6.2 simonb */ 140 1.1.6.2 simonb #define BSS(_name_,_numbytes_) \ 141 1.1.6.2 simonb .comm _name_,_numbytes_ 142 1.1.6.2 simonb 143 1.1.6.2 simonb 144 1.1.6.2 simonb /* 145 1.1.6.2 simonb * MSG 146 1.1.6.2 simonb * Allocate space for a message (a read-only ascii string) 147 1.1.6.2 simonb */ 148 1.1.6.2 simonb #define ASCIZ .asciz 149 1.1.6.2 simonb #define MSG(msg,reg,label) \ 150 1.1.6.2 simonb addl reg,@ltoff(label),gp;; \ 151 1.1.6.2 simonb ld8 reg=[reg];; \ 152 1.1.6.2 simonb .data; \ 153 1.1.6.2 simonb label: ASCIZ msg; \ 154 1.1.6.2 simonb .text; 155 1.1.6.2 simonb 156 1.1.6.2 simonb 157 1.1.6.2 simonb /* 158 1.1.6.2 simonb * System call glue. 159 1.1.6.2 simonb */ 160 1.1.6.2 simonb #define SYSCALLNUM(name) SYS_ ## name 161 1.1.6.2 simonb 162 1.1.6.2 simonb #define CALLSYS_NOERROR(name) \ 163 1.1.6.2 simonb { .mmi ; \ 164 1.1.6.2 simonb alloc r9 = ar.pfs, 0, 0, 8, 0 ; \ 165 1.1.6.2 simonb mov r31 = ar.k5 ; \ 166 1.1.6.2 simonb mov r10 = b0 ;; } \ 167 1.1.6.2 simonb { .mib ; \ 168 1.1.6.2 simonb mov r8 = SYSCALLNUM(name) ; \ 169 1.1.6.2 simonb mov b7 = r31 ; \ 170 1.1.6.2 simonb br.call.sptk b0 = b7 ;; } 171 1.1.6.2 simonb 172 1.1.6.2 simonb 173 1.1.6.2 simonb /* 174 1.1.6.2 simonb * WEAK_ALIAS: create a weak alias (ELF only). 175 1.1.6.2 simonb */ 176 1.1.6.2 simonb #define WEAK_ALIAS(alias,sym) \ 177 1.1.6.2 simonb .weak alias; \ 178 1.1.6.2 simonb alias = sym 179 1.1.6.2 simonb 180
Indexes created Thu Oct 02 01:09:59 GMT 2025