| … | |
… | |
| 75 | asm ("rep movsb" \ |
75 | asm ("rep movsb" \ |
| 76 | : "=D" (dst), "=S" (src), "=c" (len) \ |
76 | : "=D" (dst), "=S" (src), "=c" (len) \ |
| 77 | : "0" (dst), "1" (src), "2" (len)); |
77 | : "0" (dst), "1" (src), "2" (len)); |
| 78 | #endif |
78 | #endif |
| 79 | |
79 | |
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80 | #if __GNUC__ >= 3 |
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81 | # define expect(expr,value) __builtin_expect ((expr),(value)) |
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82 | # define inline inline |
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83 | #else |
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84 | # define expect(expr,value) (expr) |
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85 | # define inline static |
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86 | #endif |
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87 | |
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88 | #define expect_false(expr) expect ((expr) != 0, 0) |
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89 | #define expect_true(expr) expect ((expr) != 0, 1) |
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90 | |
| 80 | /* |
91 | /* |
| 81 | * compressed format |
92 | * compressed format |
| 82 | * |
93 | * |
| 83 | * 000LLLLL <L+1> ; literal |
94 | * 000LLLLL <L+1> ; literal |
| 84 | * LLLooooo oooooooo ; backref L |
95 | * LLLooooo oooooooo ; backref L |
| … | |
… | |
| 116 | # endif |
127 | # endif |
| 117 | #endif |
128 | #endif |
| 118 | |
129 | |
| 119 | for (;;) |
130 | for (;;) |
| 120 | { |
131 | { |
| 121 | if (ip < in_end - 2) |
132 | if (expect_true (ip < in_end - 2)) |
| 122 | { |
133 | { |
| 123 | hval = NEXT (hval, ip); |
134 | hval = NEXT (hval, ip); |
| 124 | hslot = htab + IDX (hval); |
135 | hslot = htab + IDX (hval); |
| 125 | ref = *hslot; *hslot = ip; |
136 | ref = *hslot; *hslot = ip; |
| 126 | |
137 | |
| … | |
… | |
| 130 | #endif |
141 | #endif |
| 131 | && (off = ip - ref - 1) < MAX_OFF |
142 | && (off = ip - ref - 1) < MAX_OFF |
| 132 | && ip + 4 < in_end |
143 | && ip + 4 < in_end |
| 133 | && ref > (u8 *)in_data |
144 | && ref > (u8 *)in_data |
| 134 | #if STRICT_ALIGN |
145 | #if STRICT_ALIGN |
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146 | x x x |
| 135 | && ref[0] == ip[0] |
147 | && ref[0] == ip[0] |
| 136 | && ref[1] == ip[1] |
148 | && ref[1] == ip[1] |
| 137 | && ref[2] == ip[2] |
149 | && ref[2] == ip[2] |
| 138 | #else |
150 | #else |
| 139 | && *(u16 *)ref == *(u16 *)ip |
151 | && *(u16 *)ref == *(u16 *)ip |
| … | |
… | |
| 144 | /* match found at *ref++ */ |
156 | /* match found at *ref++ */ |
| 145 | unsigned int len = 2; |
157 | unsigned int len = 2; |
| 146 | unsigned int maxlen = in_end - ip - len; |
158 | unsigned int maxlen = in_end - ip - len; |
| 147 | maxlen = maxlen > MAX_REF ? MAX_REF : maxlen; |
159 | maxlen = maxlen > MAX_REF ? MAX_REF : maxlen; |
| 148 | |
160 | |
| 149 | if (op + lit + 1 + 3 >= out_end) |
161 | if (expect_false (op + lit + 1 + 3 >= out_end)) |
| 150 | return 0; |
162 | return 0; |
| 151 | |
163 | |
| 152 | do |
164 | if (expect_false (lit)) |
| 153 | len++; |
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| 154 | while (len < maxlen && ref[len] == ip[len]); |
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| 155 | |
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| 156 | if (lit) |
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| 157 | { |
165 | { |
| 158 | *op++ = lit - 1; |
166 | *op++ = lit - 1; |
| 159 | lit = -lit; |
167 | lit = -lit; |
| 160 | do |
168 | do |
| 161 | *op++ = ip[lit]; |
169 | *op++ = ip[lit]; |
| 162 | while (++lit); |
170 | while (expect_false (++lit)); |
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171 | } |
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172 | |
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173 | for (;;) |
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174 | { |
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175 | if (expect_true (maxlen > 16)) |
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176 | { |
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177 | len++; if (ref [len] != ip [len]) break; |
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178 | len++; if (ref [len] != ip [len]) break; |
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179 | len++; if (ref [len] != ip [len]) break; |
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180 | len++; if (ref [len] != ip [len]) break; |
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181 | len++; if (ref [len] != ip [len]) break; |
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182 | len++; if (ref [len] != ip [len]) break; |
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183 | len++; if (ref [len] != ip [len]) break; |
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184 | len++; if (ref [len] != ip [len]) break; |
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185 | len++; if (ref [len] != ip [len]) break; |
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186 | len++; if (ref [len] != ip [len]) break; |
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187 | len++; if (ref [len] != ip [len]) break; |
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188 | len++; if (ref [len] != ip [len]) break; |
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189 | len++; if (ref [len] != ip [len]) break; |
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190 | len++; if (ref [len] != ip [len]) break; |
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191 | len++; if (ref [len] != ip [len]) break; |
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192 | len++; if (ref [len] != ip [len]) break; |
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193 | } |
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194 | |
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195 | do |
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196 | len++; |
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197 | while (len < maxlen && ref[len] == ip[len]); |
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198 | |
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199 | break; |
| 163 | } |
200 | } |
| 164 | |
201 | |
| 165 | len -= 2; |
202 | len -= 2; |
| 166 | ip++; |
203 | ip++; |
| 167 | |
204 | |
| … | |
… | |
| 203 | while (len--); |
240 | while (len--); |
| 204 | #endif |
241 | #endif |
| 205 | continue; |
242 | continue; |
| 206 | } |
243 | } |
| 207 | } |
244 | } |
| 208 | else if (ip == in_end) |
245 | else if (expect_false (ip == in_end)) |
| 209 | break; |
246 | break; |
| 210 | |
247 | |
| 211 | /* one more literal byte we must copy */ |
248 | /* one more literal byte we must copy */ |
| 212 | lit++; |
249 | lit++; |
| 213 | ip++; |
250 | ip++; |
| 214 | |
251 | |
| 215 | if (lit == MAX_LIT) |
252 | if (expect_false (lit == MAX_LIT)) |
| 216 | { |
253 | { |
| 217 | if (op + 1 + MAX_LIT >= out_end) |
254 | if (op + 1 + MAX_LIT >= out_end) |
| 218 | return 0; |
255 | return 0; |
| 219 | |
256 | |
| 220 | *op++ = MAX_LIT - 1; |
257 | *op++ = MAX_LIT - 1; |
| 221 | |
258 | |
| 222 | #ifdef lzf_movsb |
259 | #ifdef lzf_movsb |
| 223 | ip -= lit; |
260 | ip -= MAX_LIT; |
| 224 | lzf_movsb (op, ip, lit); |
261 | lzf_movsb (op, ip, lit); |
| 225 | #else |
262 | #else |
| 226 | lit = -lit; |
263 | lit = -lit; |
| 227 | do |
264 | do |
| 228 | *op++ = ip[lit]; |
265 | *op++ = ip[lit]; |
