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1 /* Miscellaneous BPABI functions. ARMv6M implementation
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2
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3 Copyright (C) 2006, 2008, 2009 Free Software Foundation, Inc.
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4 Contributed by CodeSourcery.
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5
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6 This file is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 3, or (at your option) any
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9 later version.
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10
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11 This file is distributed in the hope that it will be useful, but
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12 WITHOUT ANY WARRANTY; without even the implied warranty of
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13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 General Public License for more details.
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15
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16 Under Section 7 of GPL version 3, you are granted additional
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17 permissions described in the GCC Runtime Library Exception, version
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18 3.1, as published by the Free Software Foundation.
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19
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20 You should have received a copy of the GNU General Public License and
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21 a copy of the GCC Runtime Library Exception along with this program;
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22 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 <http://www.gnu.org/licenses/>. */
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24
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25 #ifdef L_aeabi_lcmp
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26
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27 FUNC_START aeabi_lcmp
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28 cmp xxh, yyh
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29 beq 1f
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30 bgt 2f
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31 mov r0, #1
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32 neg r0, r0
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33 RET
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34 2:
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35 mov r0, #1
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36 RET
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37 1:
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38 sub r0, xxl, yyl
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39 beq 1f
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40 bhi 2f
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41 mov r0, #1
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42 neg r0, r0
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43 RET
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44 2:
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45 mov r0, #1
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46 1:
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47 RET
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48 FUNC_END aeabi_lcmp
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49
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50 #endif /* L_aeabi_lcmp */
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51
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52 #ifdef L_aeabi_ulcmp
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53
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54 FUNC_START aeabi_ulcmp
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55 cmp xxh, yyh
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56 bne 1f
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57 sub r0, xxl, yyl
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58 beq 2f
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59 1:
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60 bcs 1f
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61 mov r0, #1
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62 neg r0, r0
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63 RET
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64 1:
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65 mov r0, #1
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66 2:
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67 RET
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68 FUNC_END aeabi_ulcmp
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69
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70 #endif /* L_aeabi_ulcmp */
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71
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72 #ifdef L_aeabi_ldivmod
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73
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74 FUNC_START aeabi_ldivmod
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75 push {r0, r1}
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76 mov r0, sp
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77 push {r0, lr}
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78 ldr r0, [sp, #8]
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79 bl SYM(__gnu_ldivmod_helper)
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80 ldr r3, [sp, #4]
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81 mov lr, r3
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82 add sp, sp, #8
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83 pop {r2, r3}
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84 RET
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85 FUNC_END aeabi_ldivmod
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86
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87 #endif /* L_aeabi_ldivmod */
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88
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89 #ifdef L_aeabi_uldivmod
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90
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91 FUNC_START aeabi_uldivmod
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92 push {r0, r1}
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93 mov r0, sp
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94 push {r0, lr}
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95 ldr r0, [sp, #8]
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96 bl SYM(__gnu_uldivmod_helper)
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97 ldr r3, [sp, #4]
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98 mov lr, r3
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99 add sp, sp, #8
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100 pop {r2, r3}
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101 RET
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102 FUNC_END aeabi_uldivmod
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103
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104 #endif /* L_aeabi_uldivmod */
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105
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106 #ifdef L_arm_addsubsf3
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107
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108 FUNC_START aeabi_frsub
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109
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110 push {r4, lr}
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111 mov r4, #1
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112 lsl r4, #31
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113 eor r0, r0, r4
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114 bl __aeabi_fadd
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115 pop {r4, pc}
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116
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117 FUNC_END aeabi_frsub
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118
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119 #endif /* L_arm_addsubsf3 */
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120
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121 #ifdef L_arm_cmpsf2
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122
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123 FUNC_START aeabi_cfrcmple
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124
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125 mov ip, r0
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126 mov r0, r1
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127 mov r1, ip
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128 b 6f
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129
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130 FUNC_START aeabi_cfcmpeq
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131 FUNC_ALIAS aeabi_cfcmple aeabi_cfcmpeq
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132
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133 @ The status-returning routines are required to preserve all
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134 @ registers except ip, lr, and cpsr.
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135 6: push {r0, r1, r2, r3, r4, lr}
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136 bl __lesf2
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137 @ Set the Z flag correctly, and the C flag unconditionally.
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138 cmp r0, #0
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139 @ Clear the C flag if the return value was -1, indicating
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140 @ that the first operand was smaller than the second.
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141 bmi 1f
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142 mov r1, #0
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143 cmn r0, r1
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144 1:
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145 pop {r0, r1, r2, r3, r4, pc}
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146
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147 FUNC_END aeabi_cfcmple
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148 FUNC_END aeabi_cfcmpeq
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149 FUNC_END aeabi_cfrcmple
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150
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151 FUNC_START aeabi_fcmpeq
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152
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153 push {r4, lr}
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154 bl __eqsf2
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155 neg r0, r0
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156 add r0, r0, #1
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157 pop {r4, pc}
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158
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159 FUNC_END aeabi_fcmpeq
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160
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161 .macro COMPARISON cond, helper, mode=sf2
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162 FUNC_START aeabi_fcmp\cond
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163
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164 push {r4, lr}
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165 bl __\helper\mode
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166 cmp r0, #0
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167 b\cond 1f
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168 mov r0, #0
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169 pop {r4, pc}
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170 1:
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171 mov r0, #1
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172 pop {r4, pc}
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173
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174 FUNC_END aeabi_fcmp\cond
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175 .endm
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176
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177 COMPARISON lt, le
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178 COMPARISON le, le
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179 COMPARISON gt, ge
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180 COMPARISON ge, ge
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181
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182 #endif /* L_arm_cmpsf2 */
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183
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184 #ifdef L_arm_addsubdf3
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185
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186 FUNC_START aeabi_drsub
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187
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188 push {r4, lr}
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189 mov r4, #1
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190 lsl r4, #31
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191 eor xxh, xxh, r4
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192 bl __aeabi_dadd
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193 pop {r4, pc}
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194
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195 FUNC_END aeabi_drsub
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196
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197 #endif /* L_arm_addsubdf3 */
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198
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199 #ifdef L_arm_cmpdf2
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200
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201 FUNC_START aeabi_cdrcmple
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202
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203 mov ip, r0
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204 mov r0, r2
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205 mov r2, ip
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206 mov ip, r1
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207 mov r1, r3
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208 mov r3, ip
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209 b 6f
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210
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211 FUNC_START aeabi_cdcmpeq
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212 FUNC_ALIAS aeabi_cdcmple aeabi_cdcmpeq
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213
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214 @ The status-returning routines are required to preserve all
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215 @ registers except ip, lr, and cpsr.
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216 6: push {r0, r1, r2, r3, r4, lr}
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217 bl __ledf2
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218 @ Set the Z flag correctly, and the C flag unconditionally.
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219 cmp r0, #0
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220 @ Clear the C flag if the return value was -1, indicating
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221 @ that the first operand was smaller than the second.
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222 bmi 1f
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223 mov r1, #0
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224 cmn r0, r1
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225 1:
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226 pop {r0, r1, r2, r3, r4, pc}
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227
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228 FUNC_END aeabi_cdcmple
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229 FUNC_END aeabi_cdcmpeq
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230 FUNC_END aeabi_cdrcmple
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231
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232 FUNC_START aeabi_dcmpeq
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233
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234 push {r4, lr}
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235 bl __eqdf2
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236 neg r0, r0
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237 add r0, r0, #1
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238 pop {r4, pc}
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239
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240 FUNC_END aeabi_dcmpeq
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241
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242 .macro COMPARISON cond, helper, mode=df2
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243 FUNC_START aeabi_dcmp\cond
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244
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245 push {r4, lr}
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246 bl __\helper\mode
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247 cmp r0, #0
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248 b\cond 1f
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249 mov r0, #0
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250 pop {r4, pc}
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251 1:
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252 mov r0, #1
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253 pop {r4, pc}
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254
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255 FUNC_END aeabi_dcmp\cond
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256 .endm
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257
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258 COMPARISON lt, le
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259 COMPARISON le, le
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260 COMPARISON gt, ge
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261 COMPARISON ge, ge
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262
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263 #endif /* L_arm_cmpdf2 */
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