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111
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1 /* Target Definitions for ft32.
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2 Copyright (C) 2015-2017 Free Software Foundation, Inc.
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3 Contributed by FTDI <support@ftdi.com>
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4
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5 This file is part of GCC.
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6
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7 GCC is free software; you can redistribute it and/or modify it
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8 under the terms of the GNU General Public License as published
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9 by the Free Software Foundation; either version 3, or (at your
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10 option) any later version.
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11
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12 GCC is distributed in the hope that it will be useful, but WITHOUT
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13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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15 License for more details.
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16
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17 You should have received a copy of the GNU General Public License
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18 along with GCC; see the file COPYING3. If not see
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19 <http://www.gnu.org/licenses/>. */
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20
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21 #ifndef GCC_FT32_H
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22 #define GCC_FT32_H
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23
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24 #undef STARTFILE_SPEC
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25 #define STARTFILE_SPEC "crt0%O%s %{msim:crti.o%s} %{!msim:crti-hw.o%s} crtbegin.o%s"
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26
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27 /* Provide an ENDFILE_SPEC appropriate for svr4. Here we tack on our own
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28 magical crtend.o file (see crtstuff.c) which provides part of the
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29 support for getting C++ file-scope static object constructed before
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30 entering `main', followed by the normal svr3/svr4 "finalizer" file,
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31 which is either `gcrtn.o' or `crtn.o'. */
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32
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33 #undef ENDFILE_SPEC
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34 #define ENDFILE_SPEC "crtend.o%s crtn.o%s"
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35
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36 /* Provide a LIB_SPEC appropriate for svr4. Here we tack on the default
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37 standard C library (unless we are building a shared library) and
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38 the simulator BSP code. */
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39
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40 #undef LIB_SPEC
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41 #define LIB_SPEC "%{!shared:%{!symbolic:-lc}} \
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42 %{msim:-Tsim.ld}"
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43
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44 #undef LINK_SPEC
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45 #define LINK_SPEC "%{h*} %{v:-V} \
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46 %{static:-Bstatic} %{shared:-shared} %{symbolic:-Bsymbolic}"
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47
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48 /* Layout of Source Language Data Types */
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49
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50 #define INT_TYPE_SIZE 32
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51 #define SHORT_TYPE_SIZE 16
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52 #define LONG_TYPE_SIZE 32
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53 #define LONG_LONG_TYPE_SIZE 64
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54
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55 #define FLOAT_TYPE_SIZE 32
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56 #define DOUBLE_TYPE_SIZE 64
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57 #define LONG_DOUBLE_TYPE_SIZE 64
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58
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59 #define DEFAULT_SIGNED_CHAR 1
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60
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61 #undef SIZE_TYPE
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62 #define SIZE_TYPE "unsigned int"
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63
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64 #undef PTRDIFF_TYPE
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65 #define PTRDIFF_TYPE "int"
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66
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67 #undef WCHAR_TYPE
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68 #define WCHAR_TYPE "long int"
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69
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70 #undef WCHAR_TYPE_SIZE
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71 #define WCHAR_TYPE_SIZE BITS_PER_WORD
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72
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73 #define REGISTER_NAMES { \
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74 "$fp", "$sp", "$r0", "$r1", \
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75 "$r2", "$r3", "$r4", "$r5", \
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76 "$r6", "$r7", "$r8", "$r9", \
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77 "$r10", "$r11", "$r12", "$r13", \
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78 "$r14", "$r15", "$r16", "$r17", "$r18", "$r19", "$r20", "$r21", "$r22", "$r23", "$r24", "$r25", "$r26", "$r27", "$r28", "$cc", \
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79 "?fp", "?ap", "$pc", "?cc" }
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80
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81 #define FT32_FP 0
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82 #define FT32_SP 1
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83 #define FT32_R0 2
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84 #define FT32_R1 3
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85 #define FT32_R2 4
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86 #define FT32_R3 5
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87 #define FT32_R4 6
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88 #define FT32_R5 7
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89 #define FT32_R6 8
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90 #define FT32_R7 9
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91 #define FT32_R8 10
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92 #define FT32_R9 11
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93 #define FT32_R10 12
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94 #define FT32_R11 13
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95 #define FT32_R12 14
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96 #define FT32_R13 15
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97 #define FT32_R14 16
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98 #define FT32_R15 17
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99 #define FT32_R16 18
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100 #define FT32_R17 19
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101 #define FT32_R18 20
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102 #define FT32_R19 21
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103 #define FT32_R20 22
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104 #define FT32_R21 23
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105 #define FT32_R22 24
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106 #define FT32_R23 25
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107 #define FT32_R24 26
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108 #define FT32_R25 27
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109 #define FT32_R26 28
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110 #define FT32_R27 29
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111 #define FT32_R28 30
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112 #define FT32_R29 31
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113 #define FT32_QAP (32 + 1)
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114 #define FT32_PC (32 + 2)
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115 #define FT32_CC (32 + 3)
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116 #define FIRST_PSEUDO_REGISTER (32 + 4)
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117
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118 enum reg_class
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119 {
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120 NO_REGS,
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121 GENERAL_REGS,
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122 SPECIAL_REGS,
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123 CC_REGS,
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124 ALL_REGS,
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125 LIM_REG_CLASSES
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126 };
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127
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128 #define REG_CLASS_CONTENTS \
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129 { { 0x00000000, 0x00000000 }, /* Empty */ \
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130 { 0xFFFFFFFF, 0x00000003 }, /* $fp, $sp, $r0 to $r13, ?fp */ \
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131 { 0x00000000, 0x00000004 }, /* $pc */ \
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132 { 0x00000000, 0x00000008 }, /* ?cc */ \
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133 { 0xFFFFFFFF, 0x0000000F } /* All registers */ \
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134 }
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135
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136 #define N_REG_CLASSES LIM_REG_CLASSES
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137
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138 #define REG_CLASS_NAMES {\
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139 "NO_REGS", \
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140 "GENERAL_REGS", \
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141 "SPECIAL_REGS", \
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142 "CC_REGS", \
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143 "ALL_REGS" }
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144
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145 #define FIXED_REGISTERS /* fp sp r0 r1 */ { 1, 1, 0, 0, \
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146 /* r2 r3 r4 r5 */ 0, 0, 0, 0, \
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147 /* r6 r7 r8 r9 */ 0, 0, 0, 0, \
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148 /* r10 r11 r12 r13 */ 0, 0, 0, 0, \
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149 /* r14 r15 r16 r17 */ 0, 0, 0, 0, \
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150 /* r18 r19 r20 r21 */ 0, 0, 0, 0, \
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151 /* r22 r23 r24 r25 */ 0, 0, 0, 0, \
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152 /* r26 r27 r28 r29 */ 0, 0, 1, 1, \
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153 /* r30 r31 */ 1, 1, 1, 1 }
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154
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155 #define CALL_USED_REGISTERS \
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156 /* fp sp r0 r1 */ { 1, 1, 1, 1, \
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157 /* r2 r3 r4 r5 */ 1, 1, 1, 1, \
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158 /* r6 r7 r8 r9 */ 1, 1, 1, 1, \
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159 /* r10 r11 r12 r13 */ 1, 1, 1, 0, \
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160 /* r14 r15 r16 r17 */ 0, 0, 0, 0, \
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161 /* r18 r19 r20 r21 */ 0, 0, 0, 0, \
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162 /* r22 r23 r24 r25 */ 0, 0, 0, 0, \
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163 /* r26 r27 r28 r29 */ 0, 0, 1, 1, \
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164 /* r30 r31 */ 1, 1, 1, 1 }
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165
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166 /* We can't copy to or from our CC register. */
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167 #define AVOID_CCMODE_COPIES 1
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168
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169 /* A C expression whose value is a register class containing hard
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170 register REGNO. */
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171 #define REGNO_REG_CLASS(R) ((R < FT32_PC) ? GENERAL_REGS : \
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172 (R == FT32_CC ? CC_REGS : SPECIAL_REGS))
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173
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174 /* The Overall Framework of an Assembler File */
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175
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176 #undef ASM_SPEC
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177 #define ASM_COMMENT_START "#"
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178 #define ASM_APP_ON ""
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179 #define ASM_APP_OFF ""
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180
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181 #define FILE_ASM_OP "\t.file\n"
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182
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183 /* Switch to the text or data segment. */
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184 #define TEXT_SECTION_ASM_OP "\t.text"
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185 #define DATA_SECTION_ASM_OP "\t.data"
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186
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187 /* Assembler Commands for Alignment */
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188
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189 #define ASM_OUTPUT_ALIGN(STREAM,POWER) \
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190 fprintf (STREAM, "\t.p2align\t%d\n", POWER);
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191
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192 /* A C compound statement to output to stdio stream STREAM the
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193 assembler syntax for an instruction operand X. */
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194 #define PRINT_OPERAND(STREAM, X, CODE) ft32_print_operand (STREAM, X, CODE)
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195
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196 #define PRINT_OPERAND_ADDRESS(STREAM ,X) ft32_print_operand_address (STREAM, X)
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197
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198 /* Output and Generation of Labels */
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199
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200 #define GLOBAL_ASM_OP "\t.global\t"
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201
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202 #define JUMP_TABLES_IN_TEXT_SECTION 1
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203
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204 /* This is how to output an element of a case-vector that is absolute. */
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205
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206 #define ASM_OUTPUT_ADDR_VEC_ELT(FILE, VALUE) \
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207 fprintf (FILE, "\tjmp\t.L%d\n", VALUE); \
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208
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209 /* Passing Arguments in Registers */
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210
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211 /* A C type for declaring a variable that is used as the first
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212 argument of `FUNCTION_ARG' and other related values. */
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213 #define CUMULATIVE_ARGS unsigned int
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214
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215 /* If defined, the maximum amount of space required for outgoing arguments
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216 will be computed and placed into the variable
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217 `current_function_outgoing_args_size'. No space will be pushed
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218 onto the stack for each call; instead, the function prologue should
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219 increase the stack frame size by this amount. */
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220 #define ACCUMULATE_OUTGOING_ARGS 1
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221
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222 /* A C statement (sans semicolon) for initializing the variable CUM
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223 for the state at the beginning of the argument list.
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224 For ft32, the first arg is passed in register 2 (aka $r0). */
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225 #define INIT_CUMULATIVE_ARGS(CUM,FNTYPE,LIBNAME,FNDECL,N_NAMED_ARGS) \
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226 (CUM = FT32_R0)
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227
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228 /* How Scalar Function Values Are Returned */
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229
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230 /* STACK AND CALLING */
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231
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232 /* Define this macro if pushing a word onto the stack moves the stack
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233 pointer to a smaller address. */
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234 #define STACK_GROWS_DOWNWARD 1
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235
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236 /* Offset from the argument pointer register to the first argument's
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237 address. On some machines it may depend on the data type of the
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238 function. */
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239 #define FIRST_PARM_OFFSET(F) 0
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240
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241 /* Define this macro to nonzero value if the addresses of local variable slots
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242 are at negative offsets from the frame pointer. */
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243 #define FRAME_GROWS_DOWNWARD 1
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244
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245 /* EXIT_IGNORE_STACK should be nonzero if, when returning from a function,
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246 the stack pointer does not matter. The value is tested only in
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247 functions that have frame pointers.
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248 No definition is equivalent to always zero. */
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249
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250 #define EXIT_IGNORE_STACK 0
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251
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252 /* Define this macro as a C expression that is nonzero for registers that are
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253 used by the epilogue or the return pattern. The stack and frame
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254 pointer registers are already assumed to be used as needed. */
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255 #define EPILOGUE_USES(R) (R == FT32_R5)
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256
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257 /* A C expression whose value is RTL representing the location of the
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258 incoming return address at the beginning of any function, before
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259 the prologue. */
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260 #define INCOMING_RETURN_ADDR_RTX \
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261 gen_frame_mem (Pmode, \
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262 plus_constant (Pmode, stack_pointer_rtx, 333 * UNITS_PER_WORD))
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263
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264 #define RETURN_ADDR_RTX(COUNT, FRAMEADDR) \
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265 ((COUNT) == 0 \
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266 ? gen_rtx_MEM (Pmode, gen_rtx_PLUS (Pmode, arg_pointer_rtx, GEN_INT (-4))) \
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267 : NULL_RTX)
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268
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269 /* Describe how we implement __builtin_eh_return. */
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270 #define EH_RETURN_DATA_REGNO(N) ((N) < 4 ? (N+2) : INVALID_REGNUM)
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271
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272 /* Store the return handler into the call frame. */
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273 #define EH_RETURN_HANDLER_RTX \
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274 gen_frame_mem (Pmode, \
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275 plus_constant (Pmode, frame_pointer_rtx, UNITS_PER_WORD))
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276
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277 /* Storage Layout */
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278
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279 #define BITS_BIG_ENDIAN 0
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280 #define BYTES_BIG_ENDIAN 0
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281 #define WORDS_BIG_ENDIAN 0
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282
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283 /* Alignment required for a function entry point, in bits. */
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284 #define FUNCTION_BOUNDARY 32
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285
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286 #define BRANCH_COST(speed_p, predictable_p) 2
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287
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288 /* Define this macro as a C expression which is nonzero if accessing
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289 less than a word of memory (i.e. a `char' or a `short') is no
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290 faster than accessing a word of memory. */
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291 #define SLOW_BYTE_ACCESS 1
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292
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293 #define STORE_FLAG_VALUE 1
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294
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295 #define MOVE_RATIO(speed) ((speed) ? 6 : 2)
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296
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297 /* Number of storage units in a word; normally the size of a
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298 general-purpose register, a power of two from 1 or 8. */
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299 #define UNITS_PER_WORD 4
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300
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301 /* Define this macro to the minimum alignment enforced by hardware
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302 for the stack pointer on this machine. The definition is a C
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303 expression for the desired alignment (measured in bits). */
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304 #define STACK_BOUNDARY 32
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305
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306 /* Normal alignment required for function parameters on the stack, in
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307 bits. All stack parameters receive at least this much alignment
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308 regardless of data type. */
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309 #define PARM_BOUNDARY 32
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310
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311 /* Alignment of field after `int : 0' in a structure. */
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312 #define EMPTY_FIELD_BOUNDARY 32
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313
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314 /* No data type wants to be aligned rounder than this. */
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315 #define BIGGEST_ALIGNMENT 32
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316
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317 /* The best alignment to use in cases where we have a choice. */
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318 #define FASTEST_ALIGNMENT 32
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319
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320 /* Align definitions of arrays, unions and structures so that
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321 initializations and copies can be made more efficient. This is not
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322 ABI-changing, so it only affects places where we can see the
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323 definition. Increasing the alignment tends to introduce padding,
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324 so don't do this when optimizing for size/conserving stack space. */
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325 #define FT32_EXPAND_ALIGNMENT(COND, EXP, ALIGN) \
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326 (((COND) && ((ALIGN) < BITS_PER_WORD) \
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327 && (TREE_CODE (EXP) == ARRAY_TYPE \
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328 || TREE_CODE (EXP) == UNION_TYPE \
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329 || TREE_CODE (EXP) == RECORD_TYPE)) ? BITS_PER_WORD : (ALIGN))
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330
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331 /* Make arrays of chars word-aligned for the same reasons. */
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332 #define DATA_ALIGNMENT(TYPE, ALIGN) \
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333 (TREE_CODE (TYPE) == ARRAY_TYPE \
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334 && TYPE_MODE (TREE_TYPE (TYPE)) == QImode \
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335 && (ALIGN) < FASTEST_ALIGNMENT ? FASTEST_ALIGNMENT : (ALIGN))
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336
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337 /* Similarly, make sure that objects on the stack are sensibly aligned. */
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338 #define LOCAL_ALIGNMENT(EXP, ALIGN) \
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339 FT32_EXPAND_ALIGNMENT(/*!flag_conserve_stack*/ 1, EXP, ALIGN)
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340
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341 /* Every structures size must be a multiple of 8 bits. */
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342 #define STRUCTURE_SIZE_BOUNDARY 8
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343
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344 /* Look at the fundamental type that is used for a bit-field and use
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345 that to impose alignment on the enclosing structure.
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346 struct s {int a:8}; should have same alignment as "int", not "char". */
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347 #define PCC_BITFIELD_TYPE_MATTERS 1
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348
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349 /* Largest integer machine mode for structures. If undefined, the default
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350 is GET_MODE_SIZE(DImode). */
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351 #define MAX_FIXED_MODE_SIZE 32
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352
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353 /* Set this nonzero if move instructions will actually fail to work
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354 when given unaligned data. */
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355 #define STRICT_ALIGNMENT 1
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356
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357 /* Generating Code for Profiling */
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358 #define FUNCTION_PROFILER(FILE,LABELNO) (abort (), 0)
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359
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360 /* Trampolines for Nested Functions. */
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361 #define TRAMPOLINE_SIZE (2 + 6 + 6 + 2 + 2 + 6)
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362
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363 /* Alignment required for trampolines, in bits. */
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364 #define TRAMPOLINE_ALIGNMENT 32
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365
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366 /* An alias for the machine mode for pointers. */
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367 #define Pmode SImode
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368
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369 #define PROMOTE_MODE(MODE, UNSIGNEDP, TYPE) \
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370 do { \
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371 if (((MODE) == HImode) \
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372 || ((MODE) == QImode)) \
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373 (MODE) = SImode; \
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374 } while (0)
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375
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376 /* An alias for the machine mode used for memory references to
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377 functions being called, in `call' RTL expressions. */
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378 #define FUNCTION_MODE QImode
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379
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380 #define STATIC_CHAIN_REGNUM FT32_R28
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381
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382 /* The register number of the stack pointer register, which must also
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383 be a fixed register according to `FIXED_REGISTERS'. */
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384 #define STACK_POINTER_REGNUM FT32_SP
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385
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386 /* The register number of the frame pointer register, which is used to
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387 access automatic variables in the stack frame. */
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388 #define FRAME_POINTER_REGNUM FT32_FP
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389
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390 /* The register number of the arg pointer register, which is used to
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391 access the function's argument list. */
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392 #define ARG_POINTER_REGNUM FT32_QAP
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393
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394 #define ELIMINABLE_REGS \
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395 {{ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
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396 {ARG_POINTER_REGNUM, FRAME_POINTER_REGNUM}, \
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397 {FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}}
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398
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399
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400 /* This macro returns the initial difference between the specified pair
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401 of registers. */
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402 #define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
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403 do { \
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404 (OFFSET) = ft32_initial_elimination_offset ((FROM), (TO)); \
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405 } while (0)
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406
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407 /* A C expression that is nonzero if REGNO is the number of a hard
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408 register in which function arguments are sometimes passed. */
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409 #define FUNCTION_ARG_REGNO_P(r) (r >= FT32_R0 && r <= FT32_R5)
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410
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411 /* A macro whose definition is the name of the class to which a valid
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412 base register must belong. A base register is one used in an
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413 address which is the register value plus a displacement. */
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414 #define BASE_REG_CLASS GENERAL_REGS
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415
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416 #define INDEX_REG_CLASS NO_REGS
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417
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418 #define HARD_REGNO_OK_FOR_BASE_P(NUM) \
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419 ((unsigned) (NUM) < FIRST_PSEUDO_REGISTER \
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420 && (REGNO_REG_CLASS(NUM) == GENERAL_REGS \
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421 || (NUM) == HARD_FRAME_POINTER_REGNUM))
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422
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423 /* A C expression which is nonzero if register number NUM is suitable
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424 for use as a base register in operand addresses. */
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425 #ifdef REG_OK_STRICT
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426 #define REGNO_OK_FOR_BASE_P(NUM) \
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427 (HARD_REGNO_OK_FOR_BASE_P(NUM) \
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428 || HARD_REGNO_OK_FOR_BASE_P(reg_renumber[(NUM)]))
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429 #else
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430 #define REGNO_OK_FOR_BASE_P(NUM) \
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431 ((NUM) >= FIRST_PSEUDO_REGISTER || HARD_REGNO_OK_FOR_BASE_P(NUM))
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432 #endif
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433
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434 /* A C expression which is nonzero if register number NUM is suitable
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435 for use as an index register in operand addresses. */
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436 #define REGNO_OK_FOR_INDEX_P(NUM) FT32_FP
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437
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438 /* The maximum number of bytes that a single instruction can move
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439 quickly between memory and registers or between two memory
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440 locations. */
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441 #define MOVE_MAX 4
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442
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443 /* Define this to be nonzero if shift instructions ignore all but the low-order
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444 few bits. */
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445 #define SHIFT_COUNT_TRUNCATED 1
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446
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447 /* All load operations zero extend. */
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448 #define LOAD_EXTEND_OP(MEM) ZERO_EXTEND
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449
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450 /* A number, the maximum number of registers that can appear in a
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451 valid memory address. */
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452 #define MAX_REGS_PER_ADDRESS 1
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453
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454 /* An alias for a machine mode name. This is the machine mode that
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455 elements of a jump-table should have. */
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456 #define CASE_VECTOR_MODE SImode
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457
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458 /* Run-time Target Specification */
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459
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460 #define TARGET_CPU_CPP_BUILTINS() \
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461 { \
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462 builtin_define ("__FT32__"); \
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463 }
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464
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465 #define HAS_LONG_UNCOND_BRANCH true
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466
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467 #define NO_FUNCTION_CSE 1
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468
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469 #define ADDR_SPACE_PM 1
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470
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471 #define REGISTER_TARGET_PRAGMAS() do { \
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472 c_register_addr_space ("__flash__", ADDR_SPACE_PM); \
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473 } while (0);
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474
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475 extern int ft32_is_mem_pm(rtx o);
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476
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477 #define ASM_OUTPUT_SYMBOL_REF(stream, sym) \
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478 do { \
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|
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479 assemble_name (stream, XSTR (sym, 0)); \
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|
480 int section_debug = in_section && \
|
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|
481 (SECTION_STYLE (in_section) == SECTION_NAMED) && \
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482 (in_section->named.common.flags & SECTION_DEBUG); \
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483 if (!section_debug && SYMBOL_REF_FLAGS (sym) & 0x1000) \
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484 asm_fprintf (stream, "-0x800000"); \
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|
|
485 } while (0)
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486
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|
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487 #endif /* GCC_FT32_H */
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