1 /* asm.h -- macros for m68k asm 2 * 3 * Copyright (c) 1995, 1996 Cygnus Support 4 * 5 * The authors hereby grant permission to use, copy, modify, distribute, 6 * and license this software and its documentation for any purpose, provided 7 * that existing copyright notices are retained in all copies and that this 8 * notice is included verbatim in any distributions. No written agreement, 9 * license, or royalty fee is required for any of the authorized uses. 10 * Modifications to this software may be copyrighted by their authors 11 * and need not follow the licensing terms described here, provided that 12 * the new terms are clearly indicated on the first page of each file where 13 * they apply. 14 */ 15 16 #if 0 17 /* 18 * XXX __USER_LABEL_PREFIX__ and __REGISTER_PREFIX__ do not work on gcc 2.7.0-3 19 * XXX The following ifdef magic fixes the problem but results in a warning 20 * XXX when compiling assembly code. 21 */ 22 #ifndef __USER_LABEL_PREFIX__ 23 /* #define __USER_LABEL_PREFIX__ "" /* no underscore for coff */ 24 #define __USER_LABEL_PREFIX__ _ /* leading underscore for aout */ 25 #endif 26 27 #ifndef __REGISTER_PREFIX__ 28 #define __REGISTER_PREFIX__ /* never has anything prefixed */ 29 #endif 30 #endif 31 32 /* 33 * some assemblers choke on '#' as an immediate value. As gcc can also 34 * use '&', use that in those cases. 35 */ 36 #ifndef __IMMEDIATE_PREFIX__ 37 #define __IMMEDIATE_PREFIX__ # 38 #endif 39 40 /* ANSI concatenation macros. */ 41 #define CONCAT1(a, b) CONCAT2(a, b) 42 #define CONCAT2(a, b) a ## b 43 44 /* use the right prefix for global labels. */ 45 #define SYM(x) CONCAT1 (__USER_LABEL_PREFIX__,x) 46 47 /* use the right prefix for registers. */ 48 #define REG(x) CONCAT1 (__REGISTER_PREFIX__,x) 49 50 /* use the right prefix for immediate values. */ 51 #define IMM(x) CONCAT1 (__IMMEDIATE_PREFIX__,x) 52 53 /* use the right prefix for register names */ 54 #define d0 REG (d0) 55 #define d1 REG (d1) 56 #define d2 REG (d2) 57 #define d3 REG (d3) 58 #define d4 REG (d4) 59 #define d5 REG (d5) 60 #define d6 REG (d6) 61 #define d7 REG (d7) 62 #define a0 REG (a0) 63 #define a1 REG (a1) 64 #define a2 REG (a2) 65 #define a3 REG (a3) 66 #define a4 REG (a4) 67 #define a5 REG (a5) 68 #define a6 REG (a6) 69 #define a7 REG (a7) 70 #define fp REG (fp) 71 #define fp0 REG (fp0) 72 #define fp1 REG (fp1) 73 #define fp2 REG (fp2) 74 #define fp3 REG (fp3) 75 #define fp4 REG (fp4) 76 #define fp5 REG (fp5) 77 #define fp6 REG (fp6) 78 #define fp7 REG (fp7) 79 #define sp REG (sp) 80 #define usp REG (usp) 81 #define vbr REG (vbr) 82 #define sr REG (sr) 83 #define fpcr REG (fpcr) 84 #define fpsr REG (fpsr) 85 #define fpi REG (fpi) 86 87 /* Provide a few macros to allow for PIC code support. 88 * With PIC, data is stored A5 relative so we've got to take a bit of special 89 * care to ensure that all loads of global data is via A5. PIC also requires 90 * jumps and subroutine calls to be PC relative rather than absolute. We cheat 91 * a little on this and in the PIC case, we use short offset branches and 92 * hope that the final object code is within range (which it should be). 93 */ 94 #ifndef __PIC__ 95 96 /* Non PIC (absolute/relocatable) versions */ 97 98 .macro PICCALL addr 99 jbsr \addr 100 .endm 101 102 .macro PICJUMP addr 103 jmp \addr 104 .endm 105 106 .macro PICLEA sym, reg 107 lea \sym, \reg 108 .endm 109 110 .macro PICPEA sym, areg 111 pea \sym 112 .endm 113 114 #else /* __PIC__ */ 115 116 /* Common for -mid-shared-libary and -msep-data */ 117 118 .macro PICCALL addr 119 bsr \addr 120 .endm 121 122 .macro PICJUMP addr 123 bra \addr 124 .endm 125 126 # if defined(__ID_SHARED_LIBRARY__) 127 128 /* -mid-shared-library versions */ 129 130 .macro PICLEA sym, reg 131 movel a5@(_current_shared_library_a5_offset_), \reg 132 movel \sym@GOT(\reg), \reg 133 .endm 134 135 .macro PICPEA sym, areg 136 movel a5@(_current_shared_library_a5_offset_), \areg 137 movel \sym@GOT(\areg), sp@- 138 .endm 139 140 # else /* !__ID_SHARED_LIBRARY__ */ 141 142 /* Versions for -msep-data */ 143 144 .macro PICLEA sym, reg 145 movel \sym@GOT(a5), \reg 146 .endm 147 148 .macro PICPEA sym, areg 149 movel \sym@GOT(a5), sp@- 150 .endm 151 152 # endif /* !__ID_SHARED_LIBRARY__ */ 153 #endif /* __PIC__ */ 154 155