Go to the documentation of this file. 77 #include <jasper/jas_config.h> 90 #define JAS_FIX_ZERO(fix_t, fracbits) \ 91 JAS_INTTOFIX(fix_t, fracbits, 0) 94 #define JAS_FIX_ONE(fix_t, fracbits) \ 95 JAS_INTTOFIX(fix_t, fracbits, 1) 98 #define JAS_FIX_HALF(fix_t, fracbits) \ 99 (JAS_CAST(fix_t, 1) << ((fracbits) - 1)) 106 #define JAS_INTTOFIX(fix_t, fracbits, x) \ 107 (JAS_CAST(fix_t, x) << (fracbits)) 110 #define JAS_FIXTOINT(fix_t, fracbits, x) \ 111 JAS_CAST(int, (x) >> (fracbits)) 114 #define JAS_FIXTODBL(fix_t, fracbits, x) \ 115 (JAS_CAST(double, x) / JAS_FIX_ONE(fix_t, fracbits)) 118 #define JAS_DBLTOFIX(fix_t, fracbits, x) \ 119 JAS_CAST(fix_t, ((x) * JAS_CAST(double, JAS_FIX_ONE(fix_t, fracbits)))) 132 #if !defined(DEBUG_OVERFLOW) 133 #define JAS_FIX_ADD JAS_FIX_ADD_FAST 135 #define JAS_FIX_ADD JAS_FIX_ADD_OFLOW 139 #define JAS_FIX_ADD_FAST(fix_t, fracbits, x, y) ((x) + (y)) 142 #define JAS_FIX_ADD_OFLOW(fix_t, fracbits, x, y) \ 144 (((y) >= 0) ? ((x) + (y) >= 0 || JAS_FIX_OFLOW(), (x) + (y)) : \ 146 (((y) >= 0) ? ((x) + (y)) : ((x) + (y) < 0 || JAS_FIX_OFLOW(), \ 150 #if !defined(DEBUG_OVERFLOW) 151 #define JAS_FIX_MUL JAS_FIX_MUL_FAST 153 #define JAS_FIX_MUL JAS_FIX_MUL_OFLOW 158 #define JAS_FIX_MUL_FAST(fix_t, fracbits, bigfix_t, x, y) \ 159 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y)) >> \ 164 #define JAS_FIX_MUL_OFLOW(fix_t, fracbits, bigfix_t, x, y) \ 165 ((JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> (fracbits)) == \ 166 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \ 168 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \ 169 (fracbits))) : JAS_FIX_OFLOW()) 172 #if !defined(DEBUG_OVERFLOW) 173 #define JAS_FIX_MULBYINT JAS_FIX_MULBYINT_FAST 175 #define JAS_FIX_MULBYINT JAS_FIX_MULBYINT_OFLOW 180 #define JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y) \ 181 JAS_CAST(fix_t, ((x) * (y))) 185 #define JAS_FIX_MULBYINT_OFLOW(fix_t, fracbits, x, y) \ 186 JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y) 189 #if !defined(DEBUG_OVERFLOW) 190 #define JAS_FIX_DIV JAS_FIX_DIV_FAST 192 #define JAS_FIX_DIV JAS_FIX_DIV_UFLOW 197 #define JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y) \ 198 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) << (fracbits)) / (y)) 202 #define JAS_FIX_DIV_UFLOW(fix_t, fracbits, bigfix_t, x, y) \ 203 JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y) 206 #if !defined(DEBUG_OVERFLOW) 207 #define JAS_FIX_NEG JAS_FIX_NEG_FAST 209 #define JAS_FIX_NEG JAS_FIX_NEG_OFLOW 213 #define JAS_FIX_NEG_FAST(fix_t, fracbits, x) \ 219 #define JAS_FIX_NEG_OFLOW(fix_t, fracbits, x) \ 220 (((x) < 0) ? (-(x) > 0 || JAS_FIX_OFLOW(), -(x)) : (-(x))) 223 #if !defined(DEBUG_OVERFLOW) 224 #define JAS_FIX_ASL JAS_FIX_ASL_FAST 226 #define JAS_FIX_ASL JAS_FIX_ASL_OFLOW 231 #define JAS_FIX_ASL_FAST(fix_t, fracbits, x, n) \ 236 #define JAS_FIX_ASL_OFLOW(fix_t, fracbits, x, n) \ 237 ((((x) << (n)) >> (n)) == (x) || JAS_FIX_OFLOW(), (x) << (n)) 240 #if !defined(DEBUG_OVERFLOW) 241 #define JAS_FIX_ASR JAS_FIX_ASR_FAST 243 #define JAS_FIX_ASR JAS_FIX_ASR_UFLOW 248 #define JAS_FIX_ASR_FAST(fix_t, fracbits, x, n) \ 253 #define JAS_FIX_ASR_UFLOW(fix_t, fracbits, x, n) \ 254 JAS_FIX_ASR_FAST(fix_t, fracbits, x, n) 261 #define JAS_FIX_SUB(fix_t, fracbits, x, y) \ 262 JAS_FIX_ADD(fix_t, fracbits, x, JAS_FIX_NEG(fix_t, fracbits, y)) 265 #define JAS_FIX_PLUSEQ(fix_t, fracbits, x, y) \ 266 ((x) = JAS_FIX_ADD(fix_t, fracbits, x, y)) 269 #define JAS_FIX_MINUSEQ(fix_t, fracbits, x, y) \ 270 ((x) = JAS_FIX_SUB(fix_t, fracbits, x, y)) 273 #define JAS_FIX_MULEQ(fix_t, fracbits, bigfix_t, x, y) \ 274 ((x) = JAS_FIX_MUL(fix_t, fracbits, bigfix_t, x, y)) 281 #define JAS_FIX_ABS(fix_t, fracbits, x) \ 282 (((x) >= 0) ? (x) : (JAS_FIX_NEG(fix_t, fracbits, x))) 285 #define JAS_FIX_ISINT(fix_t, fracbits, x) \ 286 (JAS_FIX_FLOOR(fix_t, fracbits, x) == (x)) 289 #define JAS_FIX_SGN(fix_t, fracbits, x) \ 290 ((x) >= 0 ? 1 : (-1)) 297 #define JAS_FIX_CMP(fix_t, fracbits, x, y) \ 298 ((x) > (y) ? 1 : (((x) == (y)) ? 0 : (-1))) 301 #define JAS_FIX_LT(fix_t, fracbits, x, y) \ 305 #define JAS_FIX_LTE(fix_t, fracbits, x, y) \ 309 #define JAS_FIX_GT(fix_t, fracbits, x, y) \ 313 #define JAS_FIX_GTE(fix_t, fracbits, x, y) \ 321 #define JAS_FIX_ROUND(fix_t, fracbits, x) \ 322 (((x) < 0) ? JAS_FIX_FLOOR(fix_t, fracbits, JAS_FIX_ADD(fix_t, fracbits, \ 323 (x), JAS_FIX_HALF(fix_t, fracbits))) : \ 324 JAS_FIX_NEG(fix_t, fracbits, JAS_FIX_FLOOR(fix_t, fracbits, \ 325 JAS_FIX_ADD(fix_t, fracbits, (-(x)), JAS_FIX_HALF(fix_t, fracbits))))) 329 #define JAS_FIX_FLOOR(fix_t, fracbits, x) \ 330 ((x) & (~(JAS_FIX_ONE(fix_t, fracbits) - 1))) 338 #define JAS_FIX_OFLOW() \ 339 jas_eprintf("overflow error: file %s, line %d\n", __FILE__, __LINE__) 342 #define JAS_FIX_UFLOW() \ 343 jas_eprintf("underflow error: file %s, line %d\n", __FILE__, __LINE__)