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3960
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1 /*
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2 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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20 * or visit www.oracle.com if you need additional information or have any
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21 * questions.
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22 *
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23 */
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24
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25 #ifndef OS_CPU_BSD_X86_VM_COPY_BSD_X86_INLINE_HPP
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26 #define OS_CPU_BSD_X86_VM_COPY_BSD_X86_INLINE_HPP
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27
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28 static void pd_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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29 #ifdef AMD64
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30 (void)memmove(to, from, count * HeapWordSize);
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31 #else
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32 // Includes a zero-count check.
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33 intx temp;
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34 __asm__ volatile(" testl %6,%6 ;"
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35 " jz 7f ;"
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36 " cmpl %4,%5 ;"
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37 " leal -4(%4,%6,4),%3;"
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38 " jbe 1f ;"
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39 " cmpl %7,%5 ;"
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40 " jbe 4f ;"
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41 "1: cmpl $32,%6 ;"
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42 " ja 3f ;"
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43 " subl %4,%1 ;"
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44 "2: movl (%4),%3 ;"
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45 " movl %7,(%5,%4,1) ;"
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46 " addl $4,%0 ;"
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47 " subl $1,%2 ;"
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48 " jnz 2b ;"
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49 " jmp 7f ;"
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50 "3: rep; smovl ;"
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51 " jmp 7f ;"
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52 "4: cmpl $32,%2 ;"
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53 " movl %7,%0 ;"
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54 " leal -4(%5,%6,4),%1;"
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55 " ja 6f ;"
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56 " subl %4,%1 ;"
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57 "5: movl (%4),%3 ;"
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58 " movl %7,(%5,%4,1) ;"
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59 " subl $4,%0 ;"
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60 " subl $1,%2 ;"
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61 " jnz 5b ;"
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62 " jmp 7f ;"
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63 "6: std ;"
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64 " rep; smovl ;"
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65 " cld ;"
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66 "7: nop "
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67 : "=S" (from), "=D" (to), "=c" (count), "=r" (temp)
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68 : "0" (from), "1" (to), "2" (count), "3" (temp)
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69 : "memory", "flags");
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70 #endif // AMD64
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71 }
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72
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73 static void pd_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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74 #ifdef AMD64
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75 switch (count) {
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76 case 8: to[7] = from[7];
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77 case 7: to[6] = from[6];
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78 case 6: to[5] = from[5];
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79 case 5: to[4] = from[4];
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80 case 4: to[3] = from[3];
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81 case 3: to[2] = from[2];
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82 case 2: to[1] = from[1];
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83 case 1: to[0] = from[0];
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84 case 0: break;
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85 default:
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86 (void)memcpy(to, from, count * HeapWordSize);
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87 break;
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88 }
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89 #else
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90 // Includes a zero-count check.
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91 intx temp;
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92 __asm__ volatile(" testl %6,%6 ;"
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93 " jz 3f ;"
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94 " cmpl $32,%6 ;"
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95 " ja 2f ;"
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96 " subl %4,%1 ;"
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97 "1: movl (%4),%3 ;"
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98 " movl %7,(%5,%4,1);"
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99 " addl $4,%0 ;"
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100 " subl $1,%2 ;"
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101 " jnz 1b ;"
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102 " jmp 3f ;"
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103 "2: rep; smovl ;"
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104 "3: nop "
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105 : "=S" (from), "=D" (to), "=c" (count), "=r" (temp)
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106 : "0" (from), "1" (to), "2" (count), "3" (temp)
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107 : "memory", "cc");
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108 #endif // AMD64
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109 }
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110
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111 static void pd_disjoint_words_atomic(HeapWord* from, HeapWord* to, size_t count) {
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112 #ifdef AMD64
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113 switch (count) {
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114 case 8: to[7] = from[7];
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115 case 7: to[6] = from[6];
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116 case 6: to[5] = from[5];
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117 case 5: to[4] = from[4];
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118 case 4: to[3] = from[3];
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119 case 3: to[2] = from[2];
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120 case 2: to[1] = from[1];
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121 case 1: to[0] = from[0];
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122 case 0: break;
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123 default:
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124 while (count-- > 0) {
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125 *to++ = *from++;
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126 }
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127 break;
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128 }
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129 #else
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130 // pd_disjoint_words is word-atomic in this implementation.
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131 pd_disjoint_words(from, to, count);
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132 #endif // AMD64
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133 }
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134
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135 static void pd_aligned_conjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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136 pd_conjoint_words(from, to, count);
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137 }
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138
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139 static void pd_aligned_disjoint_words(HeapWord* from, HeapWord* to, size_t count) {
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140 pd_disjoint_words(from, to, count);
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141 }
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142
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143 static void pd_conjoint_bytes(void* from, void* to, size_t count) {
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144 #ifdef AMD64
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145 (void)memmove(to, from, count);
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146 #else
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147 // Includes a zero-count check.
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148 intx temp;
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149 __asm__ volatile(" testl %6,%6 ;"
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150 " jz 13f ;"
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151 " cmpl %4,%5 ;"
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152 " leal -1(%4,%6),%3 ;"
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153 " jbe 1f ;"
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154 " cmpl %7,%5 ;"
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155 " jbe 8f ;"
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156 "1: cmpl $3,%6 ;"
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157 " jbe 6f ;"
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158 " movl %6,%3 ;"
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159 " movl $4,%2 ;"
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160 " subl %4,%2 ;"
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161 " andl $3,%2 ;"
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162 " jz 2f ;"
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163 " subl %6,%3 ;"
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164 " rep; smovb ;"
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165 "2: movl %7,%2 ;"
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166 " shrl $2,%2 ;"
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167 " jz 5f ;"
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168 " cmpl $32,%2 ;"
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169 " ja 4f ;"
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170 " subl %4,%1 ;"
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171 "3: movl (%4),%%edx ;"
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172 " movl %%edx,(%5,%4,1);"
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173 " addl $4,%0 ;"
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174 " subl $1,%2 ;"
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175 " jnz 3b ;"
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176 " addl %4,%1 ;"
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177 " jmp 5f ;"
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178 "4: rep; smovl ;"
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179 "5: movl %7,%2 ;"
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180 " andl $3,%2 ;"
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181 " jz 13f ;"
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182 "6: xorl %7,%3 ;"
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183 "7: movb (%4,%7,1),%%dl ;"
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184 " movb %%dl,(%5,%7,1) ;"
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185 " addl $1,%3 ;"
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186 " subl $1,%2 ;"
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187 " jnz 7b ;"
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188 " jmp 13f ;"
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189 "8: std ;"
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190 " cmpl $12,%2 ;"
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191 " ja 9f ;"
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192 " movl %7,%0 ;"
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193 " leal -1(%6,%5),%1 ;"
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194 " jmp 11f ;"
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195 "9: xchgl %3,%2 ;"
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196 " movl %6,%0 ;"
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197 " addl $1,%2 ;"
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198 " leal -1(%7,%5),%1 ;"
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199 " andl $3,%2 ;"
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200 " jz 10f ;"
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201 " subl %6,%3 ;"
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202 " rep; smovb ;"
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203 "10: movl %7,%2 ;"
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204 " subl $3,%0 ;"
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205 " shrl $2,%2 ;"
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206 " subl $3,%1 ;"
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207 " rep; smovl ;"
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208 " andl $3,%3 ;"
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209 " jz 12f ;"
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210 " movl %7,%2 ;"
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211 " addl $3,%0 ;"
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212 " addl $3,%1 ;"
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213 "11: rep; smovb ;"
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214 "12: cld ;"
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215 "13: nop ;"
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216 : "=S" (from), "=D" (to), "=c" (count), "=r" (temp)
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217 : "0" (from), "1" (to), "2" (count), "3" (temp)
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218 : "memory", "flags", "%edx");
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219 #endif // AMD64
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220 }
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221
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222 static void pd_conjoint_bytes_atomic(void* from, void* to, size_t count) {
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223 pd_conjoint_bytes(from, to, count);
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224 }
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225
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226 static void pd_conjoint_jshorts_atomic(jshort* from, jshort* to, size_t count) {
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227 _Copy_conjoint_jshorts_atomic(from, to, count);
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228 }
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229
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230 static void pd_conjoint_jints_atomic(jint* from, jint* to, size_t count) {
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231 #ifdef AMD64
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232 _Copy_conjoint_jints_atomic(from, to, count);
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233 #else
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234 assert(HeapWordSize == BytesPerInt, "heapwords and jints must be the same size");
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235 // pd_conjoint_words is word-atomic in this implementation.
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236 pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count);
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237 #endif // AMD64
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238 }
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239
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240 static void pd_conjoint_jlongs_atomic(jlong* from, jlong* to, size_t count) {
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241 #ifdef AMD64
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242 _Copy_conjoint_jlongs_atomic(from, to, count);
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243 #else
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244 // Guarantee use of fild/fistp or xmm regs via some asm code, because compilers won't.
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245 if (from > to) {
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246 while (count-- > 0) {
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247 __asm__ volatile("fildll (%0); fistpll (%1)"
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248 :
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249 : "r" (from), "r" (to)
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250 : "memory" );
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251 ++from;
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252 ++to;
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253 }
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254 } else {
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255 while (count-- > 0) {
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256 __asm__ volatile("fildll (%0,%2,8); fistpll (%1,%2,8)"
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257 :
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258 : "r" (from), "r" (to), "r" (count)
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259 : "memory" );
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260 }
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261 }
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262 #endif // AMD64
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263 }
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264
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265 static void pd_conjoint_oops_atomic(oop* from, oop* to, size_t count) {
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266 #ifdef AMD64
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267 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
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268 _Copy_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
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269 #else
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270 assert(HeapWordSize == BytesPerOop, "heapwords and oops must be the same size");
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271 // pd_conjoint_words is word-atomic in this implementation.
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272 pd_conjoint_words((HeapWord*)from, (HeapWord*)to, count);
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273 #endif // AMD64
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274 }
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275
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276 static void pd_arrayof_conjoint_bytes(HeapWord* from, HeapWord* to, size_t count) {
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277 _Copy_arrayof_conjoint_bytes(from, to, count);
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278 }
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279
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280 static void pd_arrayof_conjoint_jshorts(HeapWord* from, HeapWord* to, size_t count) {
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281 _Copy_arrayof_conjoint_jshorts(from, to, count);
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282 }
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283
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284 static void pd_arrayof_conjoint_jints(HeapWord* from, HeapWord* to, size_t count) {
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285 #ifdef AMD64
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286 _Copy_arrayof_conjoint_jints(from, to, count);
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287 #else
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288 pd_conjoint_jints_atomic((jint*)from, (jint*)to, count);
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289 #endif // AMD64
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290 }
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291
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292 static void pd_arrayof_conjoint_jlongs(HeapWord* from, HeapWord* to, size_t count) {
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293 #ifdef AMD64
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294 _Copy_arrayof_conjoint_jlongs(from, to, count);
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295 #else
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296 pd_conjoint_jlongs_atomic((jlong*)from, (jlong*)to, count);
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297 #endif // AMD64
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298 }
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299
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300 static void pd_arrayof_conjoint_oops(HeapWord* from, HeapWord* to, size_t count) {
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301 #ifdef AMD64
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302 assert(BytesPerLong == BytesPerOop, "jlongs and oops must be the same size");
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303 _Copy_arrayof_conjoint_jlongs(from, to, count);
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304 #else
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305 pd_conjoint_oops_atomic((oop*)from, (oop*)to, count);
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306 #endif // AMD64
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307 }
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308
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309 #endif // OS_CPU_BSD_X86_VM_COPY_BSD_X86_INLINE_HPP
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