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1 /* Definitions of target machine for GNU compiler. VAX version.
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2 Copyright (C) 1987, 1988, 1991, 1993, 1994, 1995, 1996, 1997, 1998,
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3 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
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4 Free Software Foundation, Inc.
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5
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6 This file is part of GCC.
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7
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8 GCC is free software; you can redistribute it and/or modify
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9 it under the terms of the GNU General Public License as published by
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10 the Free Software Foundation; either version 3, or (at your option)
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11 any later version.
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12
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13 GCC is distributed in the hope that it will be useful,
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14 but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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16 GNU General Public License for more details.
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17
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18 You should have received a copy of the GNU General Public License
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19 along with GCC; see the file COPYING3. If not see
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20 <http://www.gnu.org/licenses/>. */
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21
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22
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23 /* Target CPU builtins. */
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24 #define TARGET_CPU_CPP_BUILTINS() \
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25 do \
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26 { \
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27 builtin_define ("__vax__"); \
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28 builtin_assert ("cpu=vax"); \
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29 builtin_assert ("machine=vax"); \
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30 if (TARGET_G_FLOAT) \
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31 { \
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32 builtin_define ("__GFLOAT"); \
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33 builtin_define ("__GFLOAT__"); \
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34 } \
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35 } \
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36 while (0)
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37
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38 #define VMS_TARGET 0
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39
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40 /* Use -J option for long branch support with Unix assembler. */
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41
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42 #define ASM_SPEC "-J"
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43
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44 /* Choose proper libraries depending on float format.
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45 Note that there are no profiling libraries for g-format.
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46 Also use -lg for the sake of dbx. */
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47
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48 #define LIB_SPEC "%{g:-lg}\
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49 %{mg:%{lm:-lmg} -lcg \
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50 %{p:%eprofiling not supported with -mg\n}\
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51 %{pg:%eprofiling not supported with -mg\n}}\
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52 %{!mg:%{!p:%{!pg:-lc}}%{p:-lc_p}%{pg:-lc_p}}"
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53
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54 /* Print subsidiary information on the compiler version in use. */
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55
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56 #ifndef TARGET_NAME /* A more specific value might be supplied via -D. */
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57 #define TARGET_NAME "vax"
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58 #endif
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59 #define TARGET_VERSION fprintf (stderr, " (%s)", TARGET_NAME)
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60
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61 /* Run-time compilation parameters selecting different hardware subsets. */
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62
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63 /* Nonzero if ELF. Redefined by vax/elf.h. */
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64 #define TARGET_ELF 0
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65
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66 /* Default target_flags if no switches specified. */
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67
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68 #ifndef TARGET_DEFAULT
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69 #define TARGET_DEFAULT (MASK_UNIX_ASM)
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70 #endif
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71
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72 #define OVERRIDE_OPTIONS override_options ()
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73
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74
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75 /* Target machine storage layout */
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76
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77 /* Define this if most significant bit is lowest numbered
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78 in instructions that operate on numbered bit-fields.
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79 This is not true on the VAX. */
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80 #define BITS_BIG_ENDIAN 0
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81
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82 /* Define this if most significant byte of a word is the lowest numbered. */
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83 /* That is not true on the VAX. */
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84 #define BYTES_BIG_ENDIAN 0
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85
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86 /* Define this if most significant word of a multiword number is the lowest
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87 numbered. */
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88 /* This is not true on the VAX. */
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89 #define WORDS_BIG_ENDIAN 0
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90
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91 /* Width of a word, in units (bytes). */
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92 #define UNITS_PER_WORD 4
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93
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94 /* Allocation boundary (in *bits*) for storing arguments in argument list. */
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95 #define PARM_BOUNDARY 32
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96
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97 /* Allocation boundary (in *bits*) for the code of a function. */
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98 #define FUNCTION_BOUNDARY 16
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99
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100 /* Alignment of field after `int : 0' in a structure. */
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101 #define EMPTY_FIELD_BOUNDARY (TARGET_VAXC_ALIGNMENT ? 8 : 32)
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102
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103 /* Every structure's size must be a multiple of this. */
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104 #define STRUCTURE_SIZE_BOUNDARY 8
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105
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106 /* A bit-field declared as `int' forces `int' alignment for the struct. */
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107 #define PCC_BITFIELD_TYPE_MATTERS (!TARGET_VAXC_ALIGNMENT)
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108
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109 /* No data type wants to be aligned rounder than this. */
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110 #define BIGGEST_ALIGNMENT 32
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111
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112 /* No structure field wants to be aligned rounder than this. */
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113 #define BIGGEST_FIELD_ALIGNMENT (TARGET_VAXC_ALIGNMENT ? 8 : 32)
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114
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115 /* Set this nonzero if move instructions will actually fail to work
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116 when given unaligned data. */
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117 #define STRICT_ALIGNMENT 0
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118
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119 /* Let's keep the stack somewhat aligned. */
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120 #define STACK_BOUNDARY 32
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121
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122 /* The table of an ADDR_DIFF_VEC must be contiguous with the case
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123 opcode, it is part of the case instruction. */
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124 #define ADDR_VEC_ALIGN(ADDR_VEC) 0
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125
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126 /* Standard register usage. */
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127
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128 /* Number of actual hardware registers.
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129 The hardware registers are assigned numbers for the compiler
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130 from 0 to just below FIRST_PSEUDO_REGISTER.
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131 All registers that the compiler knows about must be given numbers,
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132 even those that are not normally considered general registers. */
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133 #define FIRST_PSEUDO_REGISTER 16
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134
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135 /* 1 for registers that have pervasive standard uses
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136 and are not available for the register allocator.
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137 On the VAX, these are the AP, FP, SP and PC. */
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138 #define FIXED_REGISTERS {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1}
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139
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140 /* 1 for registers not available across function calls.
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141 These must include the FIXED_REGISTERS and also any
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142 registers that can be used without being saved.
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143 The latter must include the registers where values are returned
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144 and the register where structure-value addresses are passed.
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145 Aside from that, you can include as many other registers as you like. */
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146 #define CALL_USED_REGISTERS {1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1}
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147
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148 /* Return number of consecutive hard regs needed starting at reg REGNO
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149 to hold something of mode MODE.
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150 This is ordinarily the length in words of a value of mode MODE
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151 but can be less for certain modes in special long registers.
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152 On the VAX, all registers are one word long. */
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153 #define HARD_REGNO_NREGS(REGNO, MODE) \
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154 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
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155
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156 /* Value is 1 if hard register REGNO can hold a value of machine-mode MODE.
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157 On the VAX, all registers can hold all modes. */
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158 #define HARD_REGNO_MODE_OK(REGNO, MODE) 1
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159
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160 /* Value is 1 if it is a good idea to tie two pseudo registers
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161 when one has mode MODE1 and one has mode MODE2.
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162 If HARD_REGNO_MODE_OK could produce different values for MODE1 and MODE2,
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163 for any hard reg, then this must be 0 for correct output. */
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164 #define MODES_TIEABLE_P(MODE1, MODE2) 1
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165
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166 /* Specify the registers used for certain standard purposes.
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167 The values of these macros are register numbers. */
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168
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169 /* VAX pc is overloaded on a register. */
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170 #define PC_REGNUM VAX_PC_REGNUM
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171
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172 /* Register to use for pushing function arguments. */
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173 #define STACK_POINTER_REGNUM VAX_SP_REGNUM
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174
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175 /* Base register for access to local variables of the function. */
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176 #define FRAME_POINTER_REGNUM VAX_FP_REGNUM
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177
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178 /* Value should be nonzero if functions must have frame pointers.
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179 Zero means the frame pointer need not be set up (and parms
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180 may be accessed via the stack pointer) in functions that seem suitable.
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181 This is computed in `reload', in reload1.c. */
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182 #define FRAME_POINTER_REQUIRED 1
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183
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184 /* Base register for access to arguments of the function. */
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185 #define ARG_POINTER_REGNUM VAX_AP_REGNUM
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186
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187 /* Register in which static-chain is passed to a function. */
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188 #define STATIC_CHAIN_REGNUM 0
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189
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190 /* Register in which address to store a structure value
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191 is passed to a function. */
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192 #define VAX_STRUCT_VALUE_REGNUM 1
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193
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194 /* Define the classes of registers for register constraints in the
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195 machine description. Also define ranges of constants.
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196
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197 One of the classes must always be named ALL_REGS and include all hard regs.
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198 If there is more than one class, another class must be named NO_REGS
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199 and contain no registers.
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200
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201 The name GENERAL_REGS must be the name of a class (or an alias for
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202 another name such as ALL_REGS). This is the class of registers
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203 that is allowed by "g" or "r" in a register constraint.
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204 Also, registers outside this class are allocated only when
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205 instructions express preferences for them.
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206
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207 The classes must be numbered in nondecreasing order; that is,
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208 a larger-numbered class must never be contained completely
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209 in a smaller-numbered class.
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210
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211 For any two classes, it is very desirable that there be another
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212 class that represents their union. */
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213
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214 /* The VAX has only one kind of registers, so NO_REGS and ALL_REGS
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215 are the only classes. */
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216
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217 enum reg_class { NO_REGS, ALL_REGS, LIM_REG_CLASSES };
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218
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219 #define N_REG_CLASSES (int) LIM_REG_CLASSES
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220
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221 /* Since GENERAL_REGS is the same class as ALL_REGS,
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222 don't give it a different class number; just make it an alias. */
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223
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224 #define GENERAL_REGS ALL_REGS
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225
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226 /* Give names of register classes as strings for dump file. */
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227
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228 #define REG_CLASS_NAMES \
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229 { "NO_REGS", "ALL_REGS" }
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230
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231 /* Define which registers fit in which classes.
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232 This is an initializer for a vector of HARD_REG_SET
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233 of length N_REG_CLASSES. */
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234
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235 #define REG_CLASS_CONTENTS {{0}, {0xffff}}
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236
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237 /* The same information, inverted:
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238 Return the class number of the smallest class containing
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239 reg number REGNO. This could be a conditional expression
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240 or could index an array. */
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241
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242 #define REGNO_REG_CLASS(REGNO) ALL_REGS
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243
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244 /* The class value for index registers, and the one for base regs. */
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245
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246 #define INDEX_REG_CLASS ALL_REGS
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247 #define BASE_REG_CLASS ALL_REGS
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248
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249 /* Get reg_class from a letter such as appears in the machine description. */
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250
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251 #define REG_CLASS_FROM_LETTER(C) NO_REGS
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252
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253 /* The letters I, J, K, L, M, N, and O in a register constraint string
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254 can be used to stand for particular ranges of immediate operands.
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255 This macro defines what the ranges are.
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256 C is the letter, and VALUE is a constant value.
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257 Return 1 if VALUE is in the range specified by C.
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258
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259 `I' is the constant zero.
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260 `J' is a value between 0 .. 63 (inclusive)
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261 `K' is a value between -128 and 127 (inclusive)
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262 'L' is a value between -32768 and 32767 (inclusive)
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263 `M' is a value between 0 and 255 (inclusive)
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264 'N' is a value between 0 and 65535 (inclusive)
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265 `O' is a value between -63 and -1 (inclusive) */
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266
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267 #define CONST_OK_FOR_LETTER_P(VALUE, C) \
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268 ( (C) == 'I' ? (VALUE) == 0 \
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269 : (C) == 'J' ? 0 <= (VALUE) && (VALUE) < 64 \
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270 : (C) == 'O' ? -63 <= (VALUE) && (VALUE) < 0 \
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271 : (C) == 'K' ? -128 <= (VALUE) && (VALUE) < 128 \
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272 : (C) == 'M' ? 0 <= (VALUE) && (VALUE) < 256 \
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273 : (C) == 'L' ? -32768 <= (VALUE) && (VALUE) < 32768 \
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274 : (C) == 'N' ? 0 <= (VALUE) && (VALUE) < 65536 \
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275 : 0)
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276
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277 /* Similar, but for floating constants, and defining letters G and H.
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278 Here VALUE is the CONST_DOUBLE rtx itself.
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279
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280 `G' is a floating-point zero. */
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281
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282 #define CONST_DOUBLE_OK_FOR_LETTER_P(VALUE, C) \
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283 ((C) == 'G' ? ((VALUE) == CONST0_RTX (DFmode) \
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284 || (VALUE) == CONST0_RTX (SFmode)) \
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285 : 0)
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286
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287 /* Optional extra constraints for this machine.
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288
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289 For the VAX, `Q' means that OP is a MEM that does not have a mode-dependent
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290 address. */
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291
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292 #define EXTRA_CONSTRAINT(OP, C) \
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293 ((C) == 'Q' \
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294 ? MEM_P (OP) && !mode_dependent_address_p (XEXP (OP, 0)) \
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295 : 0)
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296
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297 /* Given an rtx X being reloaded into a reg required to be
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298 in class CLASS, return the class of reg to actually use.
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299 In general this is just CLASS; but on some machines
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300 in some cases it is preferable to use a more restrictive class. */
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301
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302 #define PREFERRED_RELOAD_CLASS(X,CLASS) (CLASS)
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303
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304 /* Return the maximum number of consecutive registers
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305 needed to represent mode MODE in a register of class CLASS. */
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306 /* On the VAX, this is always the size of MODE in words,
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307 since all registers are the same size. */
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308 #define CLASS_MAX_NREGS(CLASS, MODE) \
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309 ((GET_MODE_SIZE (MODE) + UNITS_PER_WORD - 1) / UNITS_PER_WORD)
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310
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311 /* Stack layout; function entry, exit and calling. */
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312
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313 /* Define this if pushing a word on the stack
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314 makes the stack pointer a smaller address. */
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315 #define STACK_GROWS_DOWNWARD
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316
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317 /* Define this to nonzero if the nominal address of the stack frame
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318 is at the high-address end of the local variables;
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319 that is, each additional local variable allocated
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320 goes at a more negative offset in the frame. */
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321 #define FRAME_GROWS_DOWNWARD 1
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322
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323 /* Offset within stack frame to start allocating local variables at.
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324 If FRAME_GROWS_DOWNWARD, this is the offset to the END of the
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325 first local allocated. Otherwise, it is the offset to the BEGINNING
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326 of the first local allocated. */
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327 #define STARTING_FRAME_OFFSET 0
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328
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329 /* Given an rtx for the address of a frame,
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330 return an rtx for the address of the word in the frame
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331 that holds the dynamic chain--the previous frame's address. */
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332 #define DYNAMIC_CHAIN_ADDRESS(FRAME) plus_constant ((FRAME), 12)
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333
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334 /* If we generate an insn to push BYTES bytes,
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335 this says how many the stack pointer really advances by.
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336 On the VAX, -(sp) pushes only the bytes of the operands. */
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337 #define PUSH_ROUNDING(BYTES) (BYTES)
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338
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339 /* Offset of first parameter from the argument pointer register value. */
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340 #define FIRST_PARM_OFFSET(FNDECL) 4
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341
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342 /* Value is the number of bytes of arguments automatically
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343 popped when returning from a subroutine call.
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344 FUNDECL is the declaration node of the function (as a tree),
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345 FUNTYPE is the data type of the function (as a tree),
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346 or for a library call it is an identifier node for the subroutine name.
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347 SIZE is the number of bytes of arguments passed on the stack.
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348
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349 On the VAX, the RET insn pops a maximum of 255 args for any function. */
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350
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351 #define RETURN_POPS_ARGS(FUNDECL,FUNTYPE,SIZE) \
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352 ((SIZE) > 255 * 4 ? 0 : (SIZE))
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353
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354 /* Define how to find the value returned by a function.
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355 VALTYPE is the data type of the value (as a tree).
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356 If the precise function being called is known, FUNC is its FUNCTION_DECL;
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357 otherwise, FUNC is 0. */
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358
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359 /* On the VAX the return value is in R0 regardless. */
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360
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361 #define FUNCTION_VALUE(VALTYPE, FUNC) \
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362 gen_rtx_REG (TYPE_MODE (VALTYPE), 0)
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363
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364 /* Define how to find the value returned by a library function
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365 assuming the value has mode MODE. */
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366
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367 /* On the VAX the return value is in R0 regardless. */
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368
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369 #define LIBCALL_VALUE(MODE) gen_rtx_REG (MODE, 0)
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370
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371 /* Define this if PCC uses the nonreentrant convention for returning
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372 structure and union values. */
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373
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374 #define PCC_STATIC_STRUCT_RETURN
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375
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376 /* 1 if N is a possible register number for a function value.
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377 On the VAX, R0 is the only register thus used. */
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378
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|
|
379 #define FUNCTION_VALUE_REGNO_P(N) ((N) == 0)
|
|
|
380
|
|
|
381 /* 1 if N is a possible register number for function argument passing.
|
|
|
382 On the VAX, no registers are used in this way. */
|
|
|
383
|
|
|
384 #define FUNCTION_ARG_REGNO_P(N) 0
|
|
|
385
|
|
|
386 /* Define a data type for recording info about an argument list
|
|
|
387 during the scan of that argument list. This data type should
|
|
|
388 hold all necessary information about the function itself
|
|
|
389 and about the args processed so far, enough to enable macros
|
|
|
390 such as FUNCTION_ARG to determine where the next arg should go.
|
|
|
391
|
|
|
392 On the VAX, this is a single integer, which is a number of bytes
|
|
|
393 of arguments scanned so far. */
|
|
|
394
|
|
|
395 #define CUMULATIVE_ARGS int
|
|
|
396
|
|
|
397 /* Initialize a variable CUM of type CUMULATIVE_ARGS
|
|
|
398 for a call to a function whose data type is FNTYPE.
|
|
|
399 For a library call, FNTYPE is 0.
|
|
|
400
|
|
|
401 On the VAX, the offset starts at 0. */
|
|
|
402
|
|
|
403 #define INIT_CUMULATIVE_ARGS(CUM, FNTYPE, LIBNAME, INDIRECT, N_NAMED_ARGS) \
|
|
|
404 ((CUM) = 0)
|
|
|
405
|
|
|
406 /* Update the data in CUM to advance over an argument
|
|
|
407 of mode MODE and data type TYPE.
|
|
|
408 (TYPE is null for libcalls where that information may not be available.) */
|
|
|
409
|
|
|
410 #define FUNCTION_ARG_ADVANCE(CUM, MODE, TYPE, NAMED) \
|
|
|
411 ((CUM) += ((MODE) != BLKmode \
|
|
|
412 ? (GET_MODE_SIZE (MODE) + 3) & ~3 \
|
|
|
413 : (int_size_in_bytes (TYPE) + 3) & ~3))
|
|
|
414
|
|
|
415 /* Define where to put the arguments to a function.
|
|
|
416 Value is zero to push the argument on the stack,
|
|
|
417 or a hard register in which to store the argument.
|
|
|
418
|
|
|
419 MODE is the argument's machine mode.
|
|
|
420 TYPE is the data type of the argument (as a tree).
|
|
|
421 This is null for libcalls where that information may
|
|
|
422 not be available.
|
|
|
423 CUM is a variable of type CUMULATIVE_ARGS which gives info about
|
|
|
424 the preceding args and about the function being called.
|
|
|
425 NAMED is nonzero if this argument is a named parameter
|
|
|
426 (otherwise it is an extra parameter matching an ellipsis). */
|
|
|
427
|
|
|
428 /* On the VAX all args are pushed. */
|
|
|
429
|
|
|
430 #define FUNCTION_ARG(CUM, MODE, TYPE, NAMED) 0
|
|
|
431
|
|
|
432 /* Output assembler code to FILE to increment profiler label # LABELNO
|
|
|
433 for profiling a function entry. */
|
|
|
434
|
|
|
435 #define VAX_FUNCTION_PROFILER_NAME "mcount"
|
|
|
436 #define FUNCTION_PROFILER(FILE, LABELNO) \
|
|
|
437 do \
|
|
|
438 { \
|
|
|
439 char label[256]; \
|
|
|
440 ASM_GENERATE_INTERNAL_LABEL (label, "LP", (LABELNO)); \
|
|
|
441 fprintf (FILE, "\tmovab "); \
|
|
|
442 assemble_name (FILE, label); \
|
|
|
443 asm_fprintf (FILE, ",%Rr0\n\tjsb %s\n", \
|
|
|
444 VAX_FUNCTION_PROFILER_NAME); \
|
|
|
445 } \
|
|
|
446 while (0)
|
|
|
447
|
|
|
448 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
|
|
|
449 the stack pointer does not matter. The value is tested only in
|
|
|
450 functions that have frame pointers.
|
|
|
451 No definition is equivalent to always zero. */
|
|
|
452
|
|
|
453 #define EXIT_IGNORE_STACK 1
|
|
|
454
|
|
|
455 /* Store in the variable DEPTH the initial difference between the
|
|
|
456 frame pointer reg contents and the stack pointer reg contents,
|
|
|
457 as of the start of the function body. This depends on the layout
|
|
|
458 of the fixed parts of the stack frame and on how registers are saved.
|
|
|
459
|
|
|
460 On the VAX, FRAME_POINTER_REQUIRED is always 1, so the definition of this
|
|
|
461 macro doesn't matter. But it must be defined. */
|
|
|
462
|
|
|
463 #define INITIAL_FRAME_POINTER_OFFSET(DEPTH) (DEPTH) = 0;
|
|
|
464
|
|
|
465 /* Output assembler code for a block containing the constant parts
|
|
|
466 of a trampoline, leaving space for the variable parts. */
|
|
|
467
|
|
|
468 /* On the VAX, the trampoline contains an entry mask and two instructions:
|
|
|
469 .word NN
|
|
|
470 movl $STATIC,r0 (store the functions static chain)
|
|
|
471 jmp *$FUNCTION (jump to function code at address FUNCTION) */
|
|
|
472
|
|
|
473 #define TRAMPOLINE_TEMPLATE(FILE) \
|
|
|
474 { \
|
|
|
475 assemble_aligned_integer (2, const0_rtx); \
|
|
|
476 assemble_aligned_integer (2, GEN_INT (0x8fd0)); \
|
|
|
477 assemble_aligned_integer (4, const0_rtx); \
|
|
|
478 assemble_aligned_integer (1, GEN_INT (0x50 + STATIC_CHAIN_REGNUM)); \
|
|
|
479 assemble_aligned_integer (2, GEN_INT (0x9f17)); \
|
|
|
480 assemble_aligned_integer (4, const0_rtx); \
|
|
|
481 }
|
|
|
482
|
|
|
483 /* Length in units of the trampoline for entering a nested function. */
|
|
|
484
|
|
|
485 #define TRAMPOLINE_SIZE 15
|
|
|
486
|
|
|
487 /* Emit RTL insns to initialize the variable parts of a trampoline.
|
|
|
488 FNADDR is an RTX for the address of the function's pure code.
|
|
|
489 CXT is an RTX for the static chain value for the function. */
|
|
|
490
|
|
|
491 /* We copy the register-mask from the function's pure code
|
|
|
492 to the start of the trampoline. */
|
|
|
493 #define INITIALIZE_TRAMPOLINE(TRAMP, FNADDR, CXT) \
|
|
|
494 { \
|
|
|
495 emit_move_insn (gen_rtx_MEM (HImode, TRAMP), \
|
|
|
496 gen_rtx_MEM (HImode, FNADDR)); \
|
|
|
497 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 4)), CXT); \
|
|
|
498 emit_move_insn (gen_rtx_MEM (SImode, plus_constant (TRAMP, 11)), \
|
|
|
499 plus_constant (FNADDR, 2)); \
|
|
|
500 emit_insn (gen_sync_istream ()); \
|
|
|
501 }
|
|
|
502
|
|
|
503 /* Byte offset of return address in a stack frame. The "saved PC" field
|
|
|
504 is in element [4] when treating the frame as an array of longwords. */
|
|
|
505
|
|
|
506 #define RETURN_ADDRESS_OFFSET (4 * UNITS_PER_WORD) /* 16 */
|
|
|
507
|
|
|
508 /* A C expression whose value is RTL representing the value of the return
|
|
|
509 address for the frame COUNT steps up from the current frame.
|
|
|
510 FRAMEADDR is already the frame pointer of the COUNT frame, so we
|
|
|
511 can ignore COUNT. */
|
|
|
512
|
|
|
513 #define RETURN_ADDR_RTX(COUNT, FRAME) \
|
|
|
514 ((COUNT == 0) \
|
|
|
515 ? gen_rtx_MEM (Pmode, plus_constant (FRAME, RETURN_ADDRESS_OFFSET)) \
|
|
|
516 : (rtx) 0)
|
|
|
517
|
|
|
518
|
|
|
519 /* Addressing modes, and classification of registers for them. */
|
|
|
520
|
|
|
521 #define HAVE_POST_INCREMENT 1
|
|
|
522
|
|
|
523 #define HAVE_PRE_DECREMENT 1
|
|
|
524
|
|
|
525 /* Macros to check register numbers against specific register classes. */
|
|
|
526
|
|
|
527 /* These assume that REGNO is a hard or pseudo reg number.
|
|
|
528 They give nonzero only if REGNO is a hard reg of the suitable class
|
|
|
529 or a pseudo reg currently allocated to a suitable hard reg.
|
|
|
530 Since they use reg_renumber, they are safe only once reg_renumber
|
|
|
531 has been allocated, which happens in local-alloc.c. */
|
|
|
532
|
|
|
533 #define REGNO_OK_FOR_INDEX_P(regno) \
|
|
|
534 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
|
|
|
535 #define REGNO_OK_FOR_BASE_P(regno) \
|
|
|
536 ((regno) < FIRST_PSEUDO_REGISTER || reg_renumber[regno] >= 0)
|
|
|
537
|
|
|
538 /* Maximum number of registers that can appear in a valid memory address. */
|
|
|
539
|
|
|
540 #define MAX_REGS_PER_ADDRESS 2
|
|
|
541
|
|
|
542 /* 1 if X is an rtx for a constant that is a valid address. */
|
|
|
543
|
|
|
544 #define CONSTANT_ADDRESS_P(X) legitimate_constant_address_p (X)
|
|
|
545
|
|
|
546 /* Nonzero if the constant value X is a legitimate general operand.
|
|
|
547 It is given that X satisfies CONSTANT_P or is a CONST_DOUBLE. */
|
|
|
548
|
|
|
549 #define LEGITIMATE_CONSTANT_P(X) legitimate_constant_p (X)
|
|
|
550
|
|
|
551 /* The macros REG_OK_FOR..._P assume that the arg is a REG rtx
|
|
|
552 and check its validity for a certain class.
|
|
|
553 We have two alternate definitions for each of them.
|
|
|
554 The usual definition accepts all pseudo regs; the other rejects
|
|
|
555 them unless they have been allocated suitable hard regs.
|
|
|
556 The symbol REG_OK_STRICT causes the latter definition to be used.
|
|
|
557
|
|
|
558 Most source files want to accept pseudo regs in the hope that
|
|
|
559 they will get allocated to the class that the insn wants them to be in.
|
|
|
560 Source files for reload pass need to be strict.
|
|
|
561 After reload, it makes no difference, since pseudo regs have
|
|
|
562 been eliminated by then. */
|
|
|
563
|
|
|
564 #ifndef REG_OK_STRICT
|
|
|
565
|
|
|
566 /* Nonzero if X is a hard reg that can be used as an index
|
|
|
567 or if it is a pseudo reg. */
|
|
|
568 #define REG_OK_FOR_INDEX_P(X) 1
|
|
|
569
|
|
|
570 /* Nonzero if X is a hard reg that can be used as a base reg
|
|
|
571 or if it is a pseudo reg. */
|
|
|
572 #define REG_OK_FOR_BASE_P(X) 1
|
|
|
573
|
|
|
574 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
|
|
|
575 that is a valid memory address for an instruction. */
|
|
|
576 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
|
|
|
577 { if (legitimate_address_p ((MODE), (X), 0)) goto ADDR; }
|
|
|
578
|
|
|
579 #else
|
|
|
580
|
|
|
581 /* Nonzero if X is a hard reg that can be used as an index. */
|
|
|
582 #define REG_OK_FOR_INDEX_P(X) REGNO_OK_FOR_INDEX_P (REGNO (X))
|
|
|
583
|
|
|
584 /* Nonzero if X is a hard reg that can be used as a base reg. */
|
|
|
585 #define REG_OK_FOR_BASE_P(X) REGNO_OK_FOR_BASE_P (REGNO (X))
|
|
|
586
|
|
|
587 /* GO_IF_LEGITIMATE_ADDRESS recognizes an RTL expression
|
|
|
588 that is a valid memory address for an instruction. */
|
|
|
589 #define GO_IF_LEGITIMATE_ADDRESS(MODE, X, ADDR) \
|
|
|
590 { if (legitimate_address_p ((MODE), (X), 1)) goto ADDR; }
|
|
|
591
|
|
|
592 #endif
|
|
|
593
|
|
|
594 /* Go to LABEL if ADDR (a legitimate address expression)
|
|
|
595 has an effect that depends on the machine mode it is used for. */
|
|
|
596 #define GO_IF_MODE_DEPENDENT_ADDRESS(ADDR, LABEL) \
|
|
|
597 { if (vax_mode_dependent_address_p (ADDR)) goto LABEL; }
|
|
|
598
|
|
|
599 /* Specify the machine mode that this machine uses
|
|
|
600 for the index in the tablejump instruction. */
|
|
|
601 #define CASE_VECTOR_MODE HImode
|
|
|
602
|
|
|
603 /* Define as C expression which evaluates to nonzero if the tablejump
|
|
|
604 instruction expects the table to contain offsets from the address of the
|
|
|
605 table.
|
|
|
606 Do not define this if the table should contain absolute addresses. */
|
|
|
607 #define CASE_VECTOR_PC_RELATIVE 1
|
|
|
608
|
|
|
609 /* Indicate that jump tables go in the text section. This is
|
|
|
610 necessary when compiling PIC code. */
|
|
|
611 #define JUMP_TABLES_IN_TEXT_SECTION 1
|
|
|
612
|
|
|
613 /* Define this as 1 if `char' should by default be signed; else as 0. */
|
|
|
614 #define DEFAULT_SIGNED_CHAR 1
|
|
|
615
|
|
|
616 /* This flag, if defined, says the same insns that convert to a signed fixnum
|
|
|
617 also convert validly to an unsigned one. */
|
|
|
618 #define FIXUNS_TRUNC_LIKE_FIX_TRUNC
|
|
|
619
|
|
|
620 /* Max number of bytes we can move from memory to memory
|
|
|
621 in one reasonably fast instruction. */
|
|
|
622 #define MOVE_MAX 8
|
|
|
623
|
|
|
624 /* Nonzero if access to memory by bytes is slow and undesirable. */
|
|
|
625 #define SLOW_BYTE_ACCESS 0
|
|
|
626
|
|
|
627 /* Define if shifts truncate the shift count
|
|
|
628 which implies one can omit a sign-extension or zero-extension
|
|
|
629 of a shift count. */
|
|
|
630 /* #define SHIFT_COUNT_TRUNCATED */
|
|
|
631
|
|
|
632 /* Value is 1 if truncating an integer of INPREC bits to OUTPREC bits
|
|
|
633 is done just by pretending it is already truncated. */
|
|
|
634 #define TRULY_NOOP_TRUNCATION(OUTPREC, INPREC) 1
|
|
|
635
|
|
|
636 /* Specify the machine mode that pointers have.
|
|
|
637 After generation of rtl, the compiler makes no further distinction
|
|
|
638 between pointers and any other objects of this machine mode. */
|
|
|
639 #define Pmode SImode
|
|
|
640
|
|
|
641 /* A function address in a call instruction
|
|
|
642 is a byte address (for indexing purposes)
|
|
|
643 so give the MEM rtx a byte's mode. */
|
|
|
644 #define FUNCTION_MODE QImode
|
|
|
645
|
|
|
646 /* Specify the cost of a branch insn; roughly the number of extra insns that
|
|
|
647 should be added to avoid a branch.
|
|
|
648
|
|
|
649 Branches are extremely cheap on the VAX while the shift insns often
|
|
|
650 used to replace branches can be expensive. */
|
|
|
651
|
|
|
652 #define BRANCH_COST(speed_p, predictable_p) 0
|
|
|
653
|
|
|
654 /* Tell final.c how to eliminate redundant test instructions. */
|
|
|
655
|
|
|
656 /* Here we define machine-dependent flags and fields in cc_status
|
|
|
657 (see `conditions.h'). No extra ones are needed for the VAX. */
|
|
|
658
|
|
|
659 /* Store in cc_status the expressions
|
|
|
660 that the condition codes will describe
|
|
|
661 after execution of an instruction whose pattern is EXP.
|
|
|
662 Do not alter them if the instruction would not alter the cc's. */
|
|
|
663
|
|
|
664 #define NOTICE_UPDATE_CC(EXP, INSN) \
|
|
|
665 vax_notice_update_cc ((EXP), (INSN))
|
|
|
666
|
|
|
667 #define OUTPUT_JUMP(NORMAL, FLOAT, NO_OV) \
|
|
|
668 { if (cc_status.flags & CC_NO_OVERFLOW) \
|
|
|
669 return NO_OV; \
|
|
|
670 return NORMAL; \
|
|
|
671 }
|
|
|
672
|
|
|
673 /* Control the assembler format that we output. */
|
|
|
674
|
|
|
675 /* A C string constant describing how to begin a comment in the target
|
|
|
676 assembler language. The compiler assumes that the comment will end at
|
|
|
677 the end of the line. */
|
|
|
678
|
|
|
679 #define ASM_COMMENT_START "#"
|
|
|
680
|
|
|
681 /* Output to assembler file text saying following lines
|
|
|
682 may contain character constants, extra white space, comments, etc. */
|
|
|
683
|
|
|
684 #define ASM_APP_ON "#APP\n"
|
|
|
685
|
|
|
686 /* Output to assembler file text saying following lines
|
|
|
687 no longer contain unusual constructs. */
|
|
|
688
|
|
|
689 #define ASM_APP_OFF "#NO_APP\n"
|
|
|
690
|
|
|
691 /* Output before read-only data. */
|
|
|
692
|
|
|
693 #define TEXT_SECTION_ASM_OP "\t.text"
|
|
|
694
|
|
|
695 /* Output before writable data. */
|
|
|
696
|
|
|
697 #define DATA_SECTION_ASM_OP "\t.data"
|
|
|
698
|
|
|
699 /* How to refer to registers in assembler output.
|
|
|
700 This sequence is indexed by compiler's hard-register-number (see above).
|
|
|
701 The register names will be prefixed by REGISTER_PREFIX, if any. */
|
|
|
702
|
|
|
703 #define REGISTER_PREFIX ""
|
|
|
704 #define REGISTER_NAMES \
|
|
|
705 { "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
|
|
|
706 "r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc", }
|
|
|
707
|
|
|
708 /* This is BSD, so it wants DBX format. */
|
|
|
709
|
|
|
710 #define DBX_DEBUGGING_INFO 1
|
|
|
711
|
|
|
712 /* Do not break .stabs pseudos into continuations. */
|
|
|
713
|
|
|
714 #define DBX_CONTIN_LENGTH 0
|
|
|
715
|
|
|
716 /* This is the char to use for continuation (in case we need to turn
|
|
|
717 continuation back on). */
|
|
|
718
|
|
|
719 #define DBX_CONTIN_CHAR '?'
|
|
|
720
|
|
|
721 /* Don't use the `xsfoo;' construct in DBX output; this system
|
|
|
722 doesn't support it. */
|
|
|
723
|
|
|
724 #define DBX_NO_XREFS
|
|
|
725
|
|
|
726 /* Output the .stabs for a C `static' variable in the data section. */
|
|
|
727 #define DBX_STATIC_STAB_DATA_SECTION
|
|
|
728
|
|
|
729 /* VAX specific: which type character is used for type double? */
|
|
|
730
|
|
|
731 #define ASM_DOUBLE_CHAR (TARGET_G_FLOAT ? 'g' : 'd')
|
|
|
732
|
|
|
733 /* This is how to output a command to make the user-level label named NAME
|
|
|
734 defined for reference from other files. */
|
|
|
735
|
|
|
736 /* Globalizing directive for a label. */
|
|
|
737 #define GLOBAL_ASM_OP ".globl "
|
|
|
738
|
|
|
739 /* The prefix to add to user-visible assembler symbols. */
|
|
|
740
|
|
|
741 #define USER_LABEL_PREFIX "_"
|
|
|
742
|
|
|
743 /* This is how to store into the string LABEL
|
|
|
744 the symbol_ref name of an internal numbered label where
|
|
|
745 PREFIX is the class of label and NUM is the number within the class.
|
|
|
746 This is suitable for output with `assemble_name'. */
|
|
|
747
|
|
|
748 #define ASM_GENERATE_INTERNAL_LABEL(LABEL,PREFIX,NUM) \
|
|
|
749 sprintf (LABEL, "*%s%ld", PREFIX, (long)(NUM))
|
|
|
750
|
|
|
751 /* This is how to output an insn to push a register on the stack.
|
|
|
752 It need not be very fast code. */
|
|
|
753
|
|
|
754 #define ASM_OUTPUT_REG_PUSH(FILE,REGNO) \
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|
755 fprintf (FILE, "\tpushl %s\n", reg_names[REGNO])
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756
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757 /* This is how to output an insn to pop a register from the stack.
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758 It need not be very fast code. */
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|
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759
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|
760 #define ASM_OUTPUT_REG_POP(FILE,REGNO) \
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|
761 fprintf (FILE, "\tmovl (%s)+,%s\n", reg_names[STACK_POINTER_REGNUM], \
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|
|
762 reg_names[REGNO])
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|
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763
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764 /* This is how to output an element of a case-vector that is absolute.
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765 (The VAX does not use such vectors,
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766 but we must define this macro anyway.) */
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|
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767
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768 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
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769 do \
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|
770 { \
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|
771 char label[256]; \
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772 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE));\
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773 fprintf (FILE, "\t.long "); \
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774 assemble_name (FILE, label); \
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|
775 fprintf (FILE, "\n"); \
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|
776 } \
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|
777 while (0)
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|
778
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|
|
779 /* This is how to output an element of a case-vector that is relative. */
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|
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780
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|
|
781 #define ASM_OUTPUT_ADDR_DIFF_ELT(FILE, BODY, VALUE, REL) \
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|
782 do \
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783 { \
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784 char label[256]; \
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785 ASM_GENERATE_INTERNAL_LABEL (label, "L", (VALUE)); \
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786 fprintf (FILE, "\t.word "); \
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787 assemble_name (FILE, label); \
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788 ASM_GENERATE_INTERNAL_LABEL (label, "L", (REL)); \
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789 fprintf (FILE, "-"); \
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790 assemble_name (FILE, label); \
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|
791 fprintf (FILE, "\n"); \
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|
792 } \
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793 while (0)
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|
|
794
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|
|
795 /* This is how to output an assembler line
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|
|
796 that says to advance the location counter
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|
|
797 to a multiple of 2**LOG bytes. */
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|
|
798
|
|
|
799 #define ASM_OUTPUT_ALIGN(FILE,LOG) \
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|
|
800 fprintf (FILE, "\t.align %d\n", (LOG))
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|
|
801
|
|
|
802 /* This is how to output an assembler line
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803 that says to advance the location counter by SIZE bytes. */
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|
|
804
|
|
|
805 #define ASM_OUTPUT_SKIP(FILE,SIZE) \
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|
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806 fprintf (FILE, "\t.space %u\n", (int)(SIZE))
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|
|
807
|
|
|
808 /* This says how to output an assembler line
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|
809 to define a global common symbol. */
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|
810
|
|
|
811 #define ASM_OUTPUT_COMMON(FILE, NAME, SIZE, ROUNDED) \
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|
|
812 ( fputs (".comm ", (FILE)), \
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|
|
813 assemble_name ((FILE), (NAME)), \
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|
|
814 fprintf ((FILE), ",%u\n", (int)(ROUNDED)))
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|
|
815
|
|
|
816 /* This says how to output an assembler line
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|
|
817 to define a local common symbol. */
|
|
|
818
|
|
|
819 #define ASM_OUTPUT_LOCAL(FILE, NAME, SIZE, ROUNDED) \
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|
|
820 ( fputs (".lcomm ", (FILE)), \
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|
|
821 assemble_name ((FILE), (NAME)), \
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|
|
822 fprintf ((FILE), ",%u\n", (int)(ROUNDED)))
|
|
|
823
|
|
|
824 /* Print an instruction operand X on file FILE.
|
|
|
825 CODE is the code from the %-spec that requested printing this operand;
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|
|
826 if `%z3' was used to print operand 3, then CODE is 'z'.
|
|
|
827
|
|
|
828 VAX operand formatting codes:
|
|
|
829
|
|
|
830 letter print
|
|
|
831 C reverse branch condition
|
|
|
832 D 64-bit immediate operand
|
|
|
833 B the low 8 bits of the complement of a constant operand
|
|
|
834 H the low 16 bits of the complement of a constant operand
|
|
|
835 M a mask for the N highest bits of a word
|
|
|
836 N the complement of a constant integer operand
|
|
|
837 P constant operand plus 1
|
|
|
838 R 32 - constant operand
|
|
|
839 b the low 8 bits of a negated constant operand
|
|
|
840 h the low 16 bits of a negated constant operand
|
|
|
841 # 'd' or 'g' depending on whether dfloat or gfloat is used
|
|
|
842 | register prefix */
|
|
|
843
|
|
|
844 /* The purpose of D is to get around a quirk or bug in VAX assembler
|
|
|
845 whereby -1 in a 64-bit immediate operand means 0x00000000ffffffff,
|
|
|
846 which is not a 64-bit minus one. As a workaround, we output negative
|
|
|
847 values in hex. */
|
|
|
848 #if HOST_BITS_PER_WIDE_INT == 64
|
|
|
849 # define NEG_HWI_PRINT_HEX16 HOST_WIDE_INT_PRINT_HEX
|
|
|
850 #else
|
|
|
851 # define NEG_HWI_PRINT_HEX16 "0xffffffff%08lx"
|
|
|
852 #endif
|
|
|
853
|
|
|
854 #define PRINT_OPERAND_PUNCT_VALID_P(CODE) \
|
|
|
855 ((CODE) == '#' || (CODE) == '|')
|
|
|
856
|
|
|
857 #define PRINT_OPERAND(FILE, X, CODE) \
|
|
|
858 { if (CODE == '#') fputc (ASM_DOUBLE_CHAR, FILE); \
|
|
|
859 else if (CODE == '|') \
|
|
|
860 fputs (REGISTER_PREFIX, FILE); \
|
|
|
861 else if (CODE == 'C') \
|
|
|
862 fputs (rev_cond_name (X), FILE); \
|
|
|
863 else if (CODE == 'D' && CONST_INT_P (X) && INTVAL (X) < 0) \
|
|
|
864 fprintf (FILE, "$" NEG_HWI_PRINT_HEX16, INTVAL (X)); \
|
|
|
865 else if (CODE == 'P' && CONST_INT_P (X)) \
|
|
|
866 fprintf (FILE, "$" HOST_WIDE_INT_PRINT_DEC, INTVAL (X) + 1); \
|
|
|
867 else if (CODE == 'N' && CONST_INT_P (X)) \
|
|
|
868 fprintf (FILE, "$" HOST_WIDE_INT_PRINT_DEC, ~ INTVAL (X)); \
|
|
|
869 /* rotl instruction cannot deal with negative arguments. */ \
|
|
|
870 else if (CODE == 'R' && CONST_INT_P (X)) \
|
|
|
871 fprintf (FILE, "$" HOST_WIDE_INT_PRINT_DEC, 32 - INTVAL (X)); \
|
|
|
872 else if (CODE == 'H' && CONST_INT_P (X)) \
|
|
|
873 fprintf (FILE, "$%d", (int) (0xffff & ~ INTVAL (X))); \
|
|
|
874 else if (CODE == 'h' && CONST_INT_P (X)) \
|
|
|
875 fprintf (FILE, "$%d", (short) - INTVAL (x)); \
|
|
|
876 else if (CODE == 'B' && CONST_INT_P (X)) \
|
|
|
877 fprintf (FILE, "$%d", (int) (0xff & ~ INTVAL (X))); \
|
|
|
878 else if (CODE == 'b' && CONST_INT_P (X)) \
|
|
|
879 fprintf (FILE, "$%d", (int) (0xff & - INTVAL (X))); \
|
|
|
880 else if (CODE == 'M' && CONST_INT_P (X)) \
|
|
|
881 fprintf (FILE, "$%d", ~((1 << INTVAL (x)) - 1)); \
|
|
|
882 else if (REG_P (X)) \
|
|
|
883 fprintf (FILE, "%s", reg_names[REGNO (X)]); \
|
|
|
884 else if (MEM_P (X)) \
|
|
|
885 output_address (XEXP (X, 0)); \
|
|
|
886 else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == SFmode) \
|
|
|
887 { char dstr[30]; \
|
|
|
888 real_to_decimal (dstr, CONST_DOUBLE_REAL_VALUE (X), \
|
|
|
889 sizeof (dstr), 0, 1); \
|
|
|
890 fprintf (FILE, "$0f%s", dstr); } \
|
|
|
891 else if (GET_CODE (X) == CONST_DOUBLE && GET_MODE (X) == DFmode) \
|
|
|
892 { char dstr[30]; \
|
|
|
893 real_to_decimal (dstr, CONST_DOUBLE_REAL_VALUE (X), \
|
|
|
894 sizeof (dstr), 0, 1); \
|
|
|
895 fprintf (FILE, "$0%c%s", ASM_DOUBLE_CHAR, dstr); } \
|
|
|
896 else { putc ('$', FILE); output_addr_const (FILE, X); }}
|
|
|
897
|
|
|
898 /* Print a memory operand whose address is X, on file FILE.
|
|
|
899 This uses a function in output-vax.c. */
|
|
|
900
|
|
|
901 #define PRINT_OPERAND_ADDRESS(FILE, ADDR) \
|
|
|
902 print_operand_address (FILE, ADDR)
|
|
|
903
|
|
|
904 /* This is a blatent lie. However, it's good enough, since we don't
|
|
|
905 actually have any code whatsoever for which this isn't overridden
|
|
|
906 by the proper FDE definition. */
|
|
|
907 #define INCOMING_RETURN_ADDR_RTX gen_rtx_REG (Pmode, PC_REGNUM)
|
|
|
908
|
