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| 1 : | ia64p | 251 | #! /usr/bin/python |
| 2 : | |||
| 3 : | import math | ||
| 4 : | |||
| 5 : | pre_shuffle = [ 0, 4, 2, 6, 1, 7, 3, 5 ] | ||
| 6 : | post_shuffle = [ 0, 1, 6, 3, 7, 2, 5, 4 ] | ||
| 7 : | |||
| 8 : | constants = 16 | ||
| 9 : | float_scratch = range(32, 32+constants) | ||
| 10 : | regbase = max(float_scratch)+1 | ||
| 11 : | intregbase = 33 | ||
| 12 : | |||
| 13 : | def print_matrix(matrix,s=''): | ||
| 14 : | if s != '': | ||
| 15 : | print "\n\t// %s" % s | ||
| 16 : | for i in range(0, 8): | ||
| 17 : | print "\t// ", | ||
| 18 : | for j in range(0, 4): | ||
| 19 : | print "%2d" % matrix[i*4+j], | ||
| 20 : | print "" | ||
| 21 : | |||
| 22 : | def exchange_elements(list, a, b): | ||
| 23 : | """ Exchange two list elements | ||
| 24 : | """ | ||
| 25 : | (list[a], list[b]) = (list[b], list[a]) | ||
| 26 : | |||
| 27 : | def alloc_regs(matrix, n): | ||
| 28 : | """ get the smallest register not used by the matrix | ||
| 29 : | """ | ||
| 30 : | |||
| 31 : | regs = [ ] | ||
| 32 : | for i in range(0, n): | ||
| 33 : | m = regbase | ||
| 34 : | while m in matrix or m in regs: | ||
| 35 : | m = m + 1 | ||
| 36 : | regs.append(m) | ||
| 37 : | return regs | ||
| 38 : | |||
| 39 : | def transpose_2x2_submatrix(matrix, i, j): | ||
| 40 : | """ transpose a 2x2 submatrix in the 8x8 matrix | ||
| 41 : | """ | ||
| 42 : | a = j | ||
| 43 : | b = i | ||
| 44 : | |||
| 45 : | tmp = matrix[i*8+j] | ||
| 46 : | matrix[i*8+j] = matrix[a*8+b] | ||
| 47 : | matrix[a*8+b] = tmp | ||
| 48 : | |||
| 49 : | tmp = matrix[i*8+j+4] | ||
| 50 : | matrix[i*8+j+4] = matrix[a*8+b+4] | ||
| 51 : | matrix[a*8+b+4] = tmp | ||
| 52 : | |||
| 53 : | |||
| 54 : | def transpose(matrix): | ||
| 55 : | """ register renaming for transpose | ||
| 56 : | """ | ||
| 57 : | regs = alloc_regs(matrix, 16) | ||
| 58 : | save_regs = regs[:] | ||
| 59 : | |||
| 60 : | # emit code ... | ||
| 61 : | for i in range(1,8,2): | ||
| 62 : | for j in range(0,4): | ||
| 63 : | r1 = matrix[(i-1)*4+j] | ||
| 64 : | r2 = matrix[i*4+j] | ||
| 65 : | print '\tfmix.r f%d = f%d, f%d' % (save_regs.pop(0), r1, r2) | ||
| 66 : | |||
| 67 : | print '\t;;' | ||
| 68 : | |||
| 69 : | for i in range(0,8,2): | ||
| 70 : | for j in range(0,4): | ||
| 71 : | r1 = matrix[i*4+j] | ||
| 72 : | r2 = matrix[(i+1)*4+j] | ||
| 73 : | print '\tfmix.l f%d = f%d, f%d' % (r1, r1, r2) | ||
| 74 : | |||
| 75 : | print '\t;;' | ||
| 76 : | |||
| 77 : | # first stage, transpose the 2x2 matrices | ||
| 78 : | for i in range(1,8,2): | ||
| 79 : | for j in range(0,4): | ||
| 80 : | r = matrix[i*4+j] | ||
| 81 : | matrix[i*4+j] = regs.pop(0) | ||
| 82 : | |||
| 83 : | # print_matrix(matrix) | ||
| 84 : | |||
| 85 : | # exchange the 2x2 matrices by renaming the registers | ||
| 86 : | for i in range(0, 4): | ||
| 87 : | for j in range(i+1, 4): | ||
| 88 : | transpose_2x2_submatrix(matrix, i, j) | ||
| 89 : | |||
| 90 : | # print '' | ||
| 91 : | # print_matrix(matrix) | ||
| 92 : | # print "transpose" | ||
| 93 : | # print_matrix(matrix) | ||
| 94 : | |||
| 95 : | # register renaming for 8 regs containing a column | ||
| 96 : | def shuffle_column(matrix, col, permutation): | ||
| 97 : | l = [ ] | ||
| 98 : | for i in range(0,8): | ||
| 99 : | l.append(matrix[i*4+col]) | ||
| 100 : | for i in range(0,8): | ||
| 101 : | matrix[i*4+col] = l[permutation[i]] | ||
| 102 : | |||
| 103 : | def butterfly(matrix, col, i, j, c1, c2): | ||
| 104 : | """ register renaming for a butterfly operation in a column | ||
| 105 : | """ | ||
| 106 : | ri = matrix[i*4+col] | ||
| 107 : | rj = matrix[j*4+col] | ||
| 108 : | regs = alloc_regs(matrix, 1) | ||
| 109 : | |||
| 110 : | print '\t// (f%d, f%d) = (f%d, f%d) $ (%s, %s), (line %d, %d)' % \ | ||
| 111 : | (regs[0], rj, ri, rj, c1, c2, i, j) | ||
| 112 : | print '\tfpma f%d = f%d, %s, f%d' % (regs[0], rj, c1, ri) | ||
| 113 : | print '\tfpnma f%d = f%d, %s, f%d' % (rj, rj, c2, ri) | ||
| 114 : | print '\t;;' | ||
| 115 : | |||
| 116 : | matrix[i*4+col] = regs[0] | ||
| 117 : | |||
| 118 : | |||
| 119 : | def column_idct(matrix, col): | ||
| 120 : | |||
| 121 : | print_matrix(matrix, "before pre shuffle") | ||
| 122 : | shuffle_column(matrix, col, pre_shuffle) | ||
| 123 : | print_matrix(matrix, "after pre shuffle") | ||
| 124 : | |||
| 125 : | butterfly(matrix, col, 0, 1, 'c0', 'c0') | ||
| 126 : | butterfly(matrix, col, 2, 3, 'c1', 'c2') | ||
| 127 : | butterfly(matrix, col, 4, 5, 'c3', 'c4') | ||
| 128 : | butterfly(matrix, col, 6, 7, 'c5', 'c6') | ||
| 129 : | print '\t;;' | ||
| 130 : | butterfly(matrix, col, 0, 3, 'c7', 'c7') | ||
| 131 : | butterfly(matrix, col, 1, 2, 'c8', 'c8') | ||
| 132 : | butterfly(matrix, col, 4, 6, 'c9', 'c9') | ||
| 133 : | butterfly(matrix, col, 5, 7, 'c10', 'c10') | ||
| 134 : | print '\t;;' | ||
| 135 : | butterfly(matrix, col, 5, 6, 'c11', 'c11') | ||
| 136 : | butterfly(matrix, col, 0, 4, 'c12', 'c12') | ||
| 137 : | butterfly(matrix, col, 3, 7, 'c14', 'c14') | ||
| 138 : | print '\t;;' | ||
| 139 : | butterfly(matrix, col, 1, 5, 'c13', 'c13') | ||
| 140 : | butterfly(matrix, col, 2, 6, 'c13', 'c13') | ||
| 141 : | |||
| 142 : | print_matrix(matrix, "before post shuffle") | ||
| 143 : | shuffle_column(matrix, col, post_shuffle) | ||
| 144 : | print_matrix(matrix, "after post shuffle") | ||
| 145 : | |||
| 146 : | def gen_idct(matrix): | ||
| 147 : | |||
| 148 : | for j in range(0, 2): | ||
| 149 : | for i in range(0, 4): | ||
| 150 : | print '\tfpma f%d = f%d, c0, f0' \ | ||
| 151 : | % (2 * (matrix[i],)) | ||
| 152 : | print '\t;;' | ||
| 153 : | for i in range(0,4): | ||
| 154 : | column_idct(matrix, i) | ||
| 155 : | print '\t;;' | ||
| 156 : | transpose(matrix) | ||
| 157 : | |||
| 158 : | def gen_consts(): | ||
| 159 : | print 'addreg1 = r14' | ||
| 160 : | print 'addreg2 = r15' | ||
| 161 : | |||
| 162 : | for i in range(0, constants): | ||
| 163 : | print 'c%d = f%d' % (i, float_scratch.pop(0)) | ||
| 164 : | |||
| 165 : | sqrt2 = math.sqrt(2.0) | ||
| 166 : | t = [ ] | ||
| 167 : | s = [ ] | ||
| 168 : | c = [ ] | ||
| 169 : | for i in range(0,5): | ||
| 170 : | t.append(math.tan(i * math.pi / 16)) | ||
| 171 : | s.append(math.sin(i * math.pi / 16)) | ||
| 172 : | c.append(math.cos(i * math.pi / 16)) | ||
| 173 : | |||
| 174 : | consts = [ ] | ||
| 175 : | consts.append(1.0 / (2.0 * sqrt2)) | ||
| 176 : | consts.append(-1 / t[2]) | ||
| 177 : | consts.append(-t[2]) | ||
| 178 : | consts.append(t[1]) | ||
| 179 : | consts.append(1 / t[1]) | ||
| 180 : | consts.append(t[3]) | ||
| 181 : | consts.append(1 / t[3]) | ||
| 182 : | consts.append(0.5 * c[2]) | ||
| 183 : | consts.append(0.5 * s[2]) | ||
| 184 : | consts.append(c[3] / c[1]) | ||
| 185 : | consts.append(s[3] / s[1]) | ||
| 186 : | consts.append(c[1] / s[1]) | ||
| 187 : | consts.append(0.5 * c[1]) | ||
| 188 : | consts.append(0.5 * s[1] * c[4]) | ||
| 189 : | consts.append(0.5 * s[1]) | ||
| 190 : | consts.append(1.0) | ||
| 191 : | |||
| 192 : | print '.sdata' | ||
| 193 : | for i in range(0, constants): | ||
| 194 : | if i % 2 == 0: | ||
| 195 : | print '.align 16' | ||
| 196 : | print '.data_c%d:' % i | ||
| 197 : | print '.single %.30f, %.30f' % (consts[i], consts[i]) | ||
| 198 : | print '' | ||
| 199 : | |||
| 200 : | def gen_load(matrix): | ||
| 201 : | |||
| 202 : | for i in range(0, 64, 2): | ||
| 203 : | print '\tld2 r%d = [addreg1], 4' % (intregbase+i) | ||
| 204 : | print '\tld2 r%d = [addreg2], 4' % (intregbase+i+1) | ||
| 205 : | print '\t;;' | ||
| 206 : | |||
| 207 : | for i in range(0, 64, 2): | ||
| 208 : | print '\tsxt2 r%d = r%d' % (2*(intregbase+i,)) | ||
| 209 : | print '\tsxt2 r%d = r%d' % (2*(intregbase+i+1,)) | ||
| 210 : | print '\t;;' | ||
| 211 : | |||
| 212 : | for i in range(0, 64, 2): | ||
| 213 : | print '\tsetf.sig f%d = r%d' % (regbase+i, intregbase+i) | ||
| 214 : | print '\tsetf.sig f%d = r%d' % (regbase+i+1, intregbase+i+1) | ||
| 215 : | print '\t;;' | ||
| 216 : | |||
| 217 : | for i in range(0, 64, 2): | ||
| 218 : | print '\tfcvt.xf f%d = f%d' % (2*(regbase+i,)) | ||
| 219 : | print '\tfcvt.xf f%d = f%d' % (2*(regbase+i+1,)) | ||
| 220 : | print '\t;;' | ||
| 221 : | |||
| 222 : | for i in range(0, 32): | ||
| 223 : | print '\tfpack f%d = f%d, f%d' \ | ||
| 224 : | % (regbase+i, regbase+2*i, regbase+2*i+1) | ||
| 225 : | print '\t;;' | ||
| 226 : | |||
| 227 : | """ | ||
| 228 : | for i in range(0, len(matrix)): | ||
| 229 : | print '\tld2 r18 = [addreg1], 4' | ||
| 230 : | print '\tld2 r19 = [addreg2], 4' | ||
| 231 : | print '\t;;' | ||
| 232 : | print '\tsxt2 r18 = r18' | ||
| 233 : | print '\tsxt2 r19 = r19' | ||
| 234 : | print '\t;;' | ||
| 235 : | print '\tsetf.sig f18 = r18' | ||
| 236 : | print '\tsetf.sig f19 = r19' | ||
| 237 : | print '\t;;' | ||
| 238 : | print '\tfcvt.xf f18 = f18' | ||
| 239 : | print '\tfcvt.xf f19 = f19' | ||
| 240 : | print '\t;;' | ||
| 241 : | print '\tfpack f%d = f18, f19' % (matrix[i]) | ||
| 242 : | print '\t;;' | ||
| 243 : | """ | ||
| 244 : | |||
| 245 : | def gen_store(matrix): | ||
| 246 : | print '\tmov addreg1 = in0' | ||
| 247 : | print '\tadd addreg2 = 4, in0' | ||
| 248 : | print '\t;;' | ||
| 249 : | |||
| 250 : | for i in range(0, len(matrix)): | ||
| 251 : | print '\tfpcvt.fx f%d = f%d' % (2*(matrix[i],)) | ||
| 252 : | print '\t;;' | ||
| 253 : | |||
| 254 : | for i in range(0, len(matrix)): | ||
| 255 : | print '\tgetf.sig r%d = f%d' % (intregbase+i, matrix[i]) | ||
| 256 : | print '\t;;' | ||
| 257 : | |||
| 258 : | for i in range(0, len(matrix)): | ||
| 259 : | print '\tshl r%d = r%d, 7' % (2*(intregbase+i,)) | ||
| 260 : | print '\t;;' | ||
| 261 : | |||
| 262 : | for i in range(0, len(matrix)): | ||
| 263 : | print '\tpack4.sss r%d = r%d, r0' % (2*(intregbase+i,)) | ||
| 264 : | print '\t;;' | ||
| 265 : | |||
| 266 : | for i in range(0, len(matrix)): | ||
| 267 : | print '\tpshr2 r%d = r%d, 7' % (2*(intregbase+i,)) | ||
| 268 : | print '\t;;' | ||
| 269 : | |||
| 270 : | for i in range(0, len(matrix)): | ||
| 271 : | print '\tmux2 r%d = r%d, 0xe1' % (2*(intregbase+i,)) | ||
| 272 : | print '\t;;' | ||
| 273 : | |||
| 274 : | for i in range(0, len(matrix), 2): | ||
| 275 : | print '\tst4 [addreg1] = r%d, 8' % (intregbase+i) | ||
| 276 : | print '\tst4 [addreg2] = r%d, 8' % (intregbase+i+1) | ||
| 277 : | |||
| 278 : | def main(): | ||
| 279 : | gen_consts() | ||
| 280 : | |||
| 281 : | print '.text' | ||
| 282 : | print '.global idct_ia64' | ||
| 283 : | print '.align 16' | ||
| 284 : | print '.proc idct_ia64' | ||
| 285 : | print 'idct_ia64:' | ||
| 286 : | |||
| 287 : | f = open('idct_init.s') | ||
| 288 : | print f.read() | ||
| 289 : | f.close() | ||
| 290 : | |||
| 291 : | matrix = [ ] | ||
| 292 : | for i in range(0,32): | ||
| 293 : | matrix.append(regbase + i) | ||
| 294 : | |||
| 295 : | gen_load(matrix) | ||
| 296 : | # print_matrix(matrix) | ||
| 297 : | gen_idct(matrix) | ||
| 298 : | # transpose(matrix) | ||
| 299 : | print_matrix(matrix) | ||
| 300 : | gen_store(matrix) | ||
| 301 : | |||
| 302 : | f = open('idct_fini.s') | ||
| 303 : | print f.read() | ||
| 304 : | f.close() | ||
| 305 : | |||
| 306 : | print '.endp' | ||
| 307 : | |||
| 308 : | |||
| 309 : | if __name__ == "__main__": | ||
| 310 : | main() |
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