Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 3960 | Serge | 1 | /* |
| 2 | decode_i586: asm synth |
||
| 3 | |||
| 4 | copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1 |
||
| 5 | see COPYING and AUTHORS files in distribution or http://mpg123.org |
||
| 6 | initially written by Stefan Bieschewski |
||
| 7 | |||
| 8 | synth_1to1 works the same way as the c version of this |
||
| 9 | file. only two types of changes have been made: |
||
| 10 | - reordered floating point instructions to |
||
| 11 | prevent pipline stalls |
||
| 12 | - made WRITE_SAMPLE use integer instead of |
||
| 13 | (slower) floating point |
||
| 14 | all kinds of x86 processors should benefit from these |
||
| 15 | modifications. |
||
| 16 | |||
| 17 | useful sources of information on optimizing x86 code include: |
||
| 18 | |||
| 19 | Intel Architecture Optimization Manual |
||
| 20 | http://www.intel.com/design/pentium/manuals/242816.htm |
||
| 21 | |||
| 22 | Cyrix 6x86 Instruction Set Summary |
||
| 23 | ftp://ftp.cyrix.com/6x86/6x-dbch6.pdf |
||
| 24 | |||
| 25 | AMD-K5 Processor Software Development |
||
| 26 | http://www.amd.com/products/cpg/techdocs/appnotes/20007e.pdf |
||
| 27 | |||
| 28 | Stefan Bieschewski |
||
| 29 | |||
| 30 | $Id: decode_i586.s 1 2004-09-18 13:30:08Z thomas $ |
||
| 31 | */ |
||
| 32 | |||
| 33 | #include "mangle.h" |
||
| 34 | |||
| 35 | .data |
||
| 36 | #ifndef __APPLE__ |
||
| 37 | .section .rodata |
||
| 38 | #endif |
||
| 39 | ALIGN8 |
||
| 40 | .LC0: |
||
| 41 | .long 0x0,0x40dfffc0 |
||
| 42 | ALIGN8 |
||
| 43 | .LC1: |
||
| 44 | .long 0x0,0xc0e00000 |
||
| 45 | ALIGN8 |
||
| 46 | .text |
||
| 47 | /* int synth_1to1_i586_asm(real *bandPtr, int channel, unsigned char *out, unsigned char *buffs, int *bo, real *decwin); */ |
||
| 48 | .globl ASM_NAME(synth_1to1_i586_asm) |
||
| 49 | ASM_NAME(synth_1to1_i586_asm): |
||
| 50 | subl $12,%esp |
||
| 51 | pushl %ebp |
||
| 52 | pushl %edi |
||
| 53 | pushl %esi |
||
| 54 | pushl %ebx |
||
| 55 | /* stack: 0=ebx, 4=esi, 8=edi, 12=ebp, 16,20,24=local, 28=back, 32=bandPtr, 36=channel, 40=out, 44=buffs, 48=bo, 52=decwin */ |
||
| 56 | movl 32(%esp),%eax /* *bandPtr */ |
||
| 57 | movl 40(%esp),%esi /* *out */ |
||
| 58 | movl 48(%esp),%edi /* *bo */ |
||
| 59 | movl (%edi),%ebp /* store bo value in ebp */ |
||
| 60 | xorl %edi,%edi |
||
| 61 | cmpl %edi,36(%esp) |
||
| 62 | jne .L48 /* if(!channel) */ |
||
| 63 | decl %ebp /* bo-- */ |
||
| 64 | andl $15,%ebp /* bo &= 0xf */ |
||
| 65 | movl 48(%esp), %edi /* *bo */ |
||
| 66 | movl %ebp,(%edi) /* write back bo */ |
||
| 67 | xorl %edi,%edi /* restore %edi to 0; it's used later */ |
||
| 68 | movl 44(%esp),%ecx /* use buffs */ |
||
| 69 | jmp .L49 |
||
| 70 | .L48: /* if(channel) use buffs+2176 */ |
||
| 71 | addl $2,%esi |
||
| 72 | movl 44(%esp),%ecx /* *buffs */ |
||
| 73 | addl $2176,%ecx |
||
| 74 | .L49: |
||
| 75 | testl $1,%ebp |
||
| 76 | je .L50 |
||
| 77 | movl %ecx,%ebx |
||
| 78 | movl %ebp,16(%esp) |
||
| 79 | pushl %eax |
||
| 80 | movl 20(%esp),%edx |
||
| 81 | leal (%ebx,%edx,4),%eax |
||
| 82 | pushl %eax |
||
| 83 | movl 24(%esp),%eax |
||
| 84 | incl %eax |
||
| 85 | andl $15,%eax |
||
| 86 | leal 1088(,%eax,4),%eax |
||
| 87 | addl %ebx,%eax |
||
| 88 | jmp .L74 |
||
| 89 | .L50: |
||
| 90 | leal 1088(%ecx),%ebx |
||
| 91 | leal 1(%ebp),%edx |
||
| 92 | movl %edx,16(%esp) |
||
| 93 | pushl %eax |
||
| 94 | leal 1092(%ecx,%ebp,4),%eax |
||
| 95 | pushl %eax |
||
| 96 | leal (%ecx,%ebp,4),%eax |
||
| 97 | .L74: |
||
| 98 | pushl %eax |
||
| 99 | call ASM_NAME(dct64_i386) |
||
| 100 | addl $12,%esp |
||
| 101 | /* stack now back on track */ |
||
| 102 | movl 16(%esp),%edx |
||
| 103 | leal 0(,%edx,4),%edx |
||
| 104 | movl 52(%esp),%eax /* decwin */ |
||
| 105 | addl $64,%eax |
||
| 106 | movl %eax,%ecx |
||
| 107 | subl %edx,%ecx |
||
| 108 | movl $16,%ebp |
||
| 109 | .L55: |
||
| 110 | flds (%ecx) |
||
| 111 | fmuls (%ebx) |
||
| 112 | flds 4(%ecx) |
||
| 113 | fmuls 4(%ebx) |
||
| 114 | fxch %st(1) |
||
| 115 | flds 8(%ecx) |
||
| 116 | fmuls 8(%ebx) |
||
| 117 | fxch %st(2) |
||
| 118 | fsubrp %st,%st(1) |
||
| 119 | flds 12(%ecx) |
||
| 120 | fmuls 12(%ebx) |
||
| 121 | fxch %st(2) |
||
| 122 | faddp %st,%st(1) |
||
| 123 | flds 16(%ecx) |
||
| 124 | fmuls 16(%ebx) |
||
| 125 | fxch %st(2) |
||
| 126 | fsubrp %st,%st(1) |
||
| 127 | flds 20(%ecx) |
||
| 128 | fmuls 20(%ebx) |
||
| 129 | fxch %st(2) |
||
| 130 | faddp %st,%st(1) |
||
| 131 | flds 24(%ecx) |
||
| 132 | fmuls 24(%ebx) |
||
| 133 | fxch %st(2) |
||
| 134 | fsubrp %st,%st(1) |
||
| 135 | flds 28(%ecx) |
||
| 136 | fmuls 28(%ebx) |
||
| 137 | fxch %st(2) |
||
| 138 | faddp %st,%st(1) |
||
| 139 | flds 32(%ecx) |
||
| 140 | fmuls 32(%ebx) |
||
| 141 | fxch %st(2) |
||
| 142 | fsubrp %st,%st(1) |
||
| 143 | flds 36(%ecx) |
||
| 144 | fmuls 36(%ebx) |
||
| 145 | fxch %st(2) |
||
| 146 | faddp %st,%st(1) |
||
| 147 | flds 40(%ecx) |
||
| 148 | fmuls 40(%ebx) |
||
| 149 | fxch %st(2) |
||
| 150 | fsubrp %st,%st(1) |
||
| 151 | flds 44(%ecx) |
||
| 152 | fmuls 44(%ebx) |
||
| 153 | fxch %st(2) |
||
| 154 | faddp %st,%st(1) |
||
| 155 | flds 48(%ecx) |
||
| 156 | fmuls 48(%ebx) |
||
| 157 | fxch %st(2) |
||
| 158 | fsubrp %st,%st(1) |
||
| 159 | flds 52(%ecx) |
||
| 160 | fmuls 52(%ebx) |
||
| 161 | fxch %st(2) |
||
| 162 | faddp %st,%st(1) |
||
| 163 | flds 56(%ecx) |
||
| 164 | fmuls 56(%ebx) |
||
| 165 | fxch %st(2) |
||
| 166 | fsubrp %st,%st(1) |
||
| 167 | flds 60(%ecx) |
||
| 168 | fmuls 60(%ebx) |
||
| 169 | fxch %st(2) |
||
| 170 | subl $4,%esp |
||
| 171 | faddp %st,%st(1) |
||
| 172 | fxch %st(1) |
||
| 173 | fsubrp %st,%st(1) |
||
| 174 | fistpl (%esp) |
||
| 175 | popl %eax |
||
| 176 | cmpl $32767,%eax |
||
| 177 | jg 1f |
||
| 178 | cmpl $-32768,%eax |
||
| 179 | jl 2f |
||
| 180 | movw %ax,(%esi) |
||
| 181 | jmp 4f |
||
| 182 | 1: movw $32767,(%esi) |
||
| 183 | jmp 3f |
||
| 184 | 2: movw $-32768,(%esi) |
||
| 185 | 3: incl %edi |
||
| 186 | 4: |
||
| 187 | .L54: |
||
| 188 | addl $64,%ebx |
||
| 189 | subl $-128,%ecx |
||
| 190 | addl $4,%esi |
||
| 191 | decl %ebp |
||
| 192 | jnz .L55 |
||
| 193 | flds (%ecx) |
||
| 194 | fmuls (%ebx) |
||
| 195 | flds 8(%ecx) |
||
| 196 | fmuls 8(%ebx) |
||
| 197 | flds 16(%ecx) |
||
| 198 | fmuls 16(%ebx) |
||
| 199 | fxch %st(2) |
||
| 200 | faddp %st,%st(1) |
||
| 201 | flds 24(%ecx) |
||
| 202 | fmuls 24(%ebx) |
||
| 203 | fxch %st(2) |
||
| 204 | faddp %st,%st(1) |
||
| 205 | flds 32(%ecx) |
||
| 206 | fmuls 32(%ebx) |
||
| 207 | fxch %st(2) |
||
| 208 | faddp %st,%st(1) |
||
| 209 | flds 40(%ecx) |
||
| 210 | fmuls 40(%ebx) |
||
| 211 | fxch %st(2) |
||
| 212 | faddp %st,%st(1) |
||
| 213 | flds 48(%ecx) |
||
| 214 | fmuls 48(%ebx) |
||
| 215 | fxch %st(2) |
||
| 216 | faddp %st,%st(1) |
||
| 217 | flds 56(%ecx) |
||
| 218 | fmuls 56(%ebx) |
||
| 219 | fxch %st(2) |
||
| 220 | subl $4,%esp |
||
| 221 | faddp %st,%st(1) |
||
| 222 | fxch %st(1) |
||
| 223 | faddp %st,%st(1) |
||
| 224 | fistpl (%esp) |
||
| 225 | popl %eax |
||
| 226 | cmpl $32767,%eax |
||
| 227 | jg 1f |
||
| 228 | cmpl $-32768,%eax |
||
| 229 | jl 2f |
||
| 230 | movw %ax,(%esi) |
||
| 231 | jmp 4f |
||
| 232 | 1: movw $32767,(%esi) |
||
| 233 | jmp 3f |
||
| 234 | 2: movw $-32768,(%esi) |
||
| 235 | 3: incl %edi |
||
| 236 | 4: |
||
| 237 | .L62: |
||
| 238 | addl $-64,%ebx |
||
| 239 | addl $4,%esi |
||
| 240 | movl 16(%esp),%edx |
||
| 241 | leal -128(%ecx,%edx,8),%ecx |
||
| 242 | movl $15,%ebp |
||
| 243 | .L68: |
||
| 244 | flds -4(%ecx) |
||
| 245 | fchs |
||
| 246 | fmuls (%ebx) |
||
| 247 | flds -8(%ecx) |
||
| 248 | fmuls 4(%ebx) |
||
| 249 | fxch %st(1) |
||
| 250 | flds -12(%ecx) |
||
| 251 | fmuls 8(%ebx) |
||
| 252 | fxch %st(2) |
||
| 253 | fsubrp %st,%st(1) |
||
| 254 | flds -16(%ecx) |
||
| 255 | fmuls 12(%ebx) |
||
| 256 | fxch %st(2) |
||
| 257 | fsubrp %st,%st(1) |
||
| 258 | flds -20(%ecx) |
||
| 259 | fmuls 16(%ebx) |
||
| 260 | fxch %st(2) |
||
| 261 | fsubrp %st,%st(1) |
||
| 262 | flds -24(%ecx) |
||
| 263 | fmuls 20(%ebx) |
||
| 264 | fxch %st(2) |
||
| 265 | fsubrp %st,%st(1) |
||
| 266 | flds -28(%ecx) |
||
| 267 | fmuls 24(%ebx) |
||
| 268 | fxch %st(2) |
||
| 269 | fsubrp %st,%st(1) |
||
| 270 | flds -32(%ecx) |
||
| 271 | fmuls 28(%ebx) |
||
| 272 | fxch %st(2) |
||
| 273 | fsubrp %st,%st(1) |
||
| 274 | flds -36(%ecx) |
||
| 275 | fmuls 32(%ebx) |
||
| 276 | fxch %st(2) |
||
| 277 | fsubrp %st,%st(1) |
||
| 278 | flds -40(%ecx) |
||
| 279 | fmuls 36(%ebx) |
||
| 280 | fxch %st(2) |
||
| 281 | fsubrp %st,%st(1) |
||
| 282 | flds -44(%ecx) |
||
| 283 | fmuls 40(%ebx) |
||
| 284 | fxch %st(2) |
||
| 285 | fsubrp %st,%st(1) |
||
| 286 | flds -48(%ecx) |
||
| 287 | fmuls 44(%ebx) |
||
| 288 | fxch %st(2) |
||
| 289 | fsubrp %st,%st(1) |
||
| 290 | flds -52(%ecx) |
||
| 291 | fmuls 48(%ebx) |
||
| 292 | fxch %st(2) |
||
| 293 | fsubrp %st,%st(1) |
||
| 294 | flds -56(%ecx) |
||
| 295 | fmuls 52(%ebx) |
||
| 296 | fxch %st(2) |
||
| 297 | fsubrp %st,%st(1) |
||
| 298 | flds -60(%ecx) |
||
| 299 | fmuls 56(%ebx) |
||
| 300 | fxch %st(2) |
||
| 301 | fsubrp %st,%st(1) |
||
| 302 | flds (%ecx) |
||
| 303 | fmuls 60(%ebx) |
||
| 304 | fxch %st(2) |
||
| 305 | subl $4,%esp |
||
| 306 | fsubrp %st,%st(1) |
||
| 307 | fxch %st(1) |
||
| 308 | fsubrp %st,%st(1) |
||
| 309 | fistpl (%esp) |
||
| 310 | popl %eax |
||
| 311 | cmpl $32767,%eax |
||
| 312 | jg 1f |
||
| 313 | cmpl $-32768,%eax |
||
| 314 | jl 2f |
||
| 315 | movw %ax,(%esi) |
||
| 316 | jmp 4f |
||
| 317 | 1: movw $32767,(%esi) |
||
| 318 | jmp 3f |
||
| 319 | 2: movw $-32768,(%esi) |
||
| 320 | 3: incl %edi |
||
| 321 | 4: |
||
| 322 | .L67: |
||
| 323 | addl $-64,%ebx |
||
| 324 | addl $-128,%ecx |
||
| 325 | addl $4,%esi |
||
| 326 | decl %ebp |
||
| 327 | jnz .L68 |
||
| 328 | movl %edi,%eax |
||
| 329 | popl %ebx |
||
| 330 | popl %esi |
||
| 331 | popl %edi |
||
| 332 | popl %ebp |
||
| 333 | addl $12,%esp |
||
| 334 | ret |
||
| 335 | |||
| 336 | NONEXEC_STACK |