78 #include <jasper/jas_config.h> 
   84 #include <jasper/jas_types.h> 
   85 #include <jasper/jas_debug.h> 
   96 #define JAS_FIX_ZERO(fix_t, fracbits) \ 
  100 #define JAS_FIX_ONE(fix_t, fracbits) \ 
  101         (JAS_CAST(fix_t, 1) << (fracbits)) 
  104 #define JAS_FIX_HALF(fix_t, fracbits) \ 
  105         (JAS_CAST(fix_t, 1) << ((fracbits) - 1)) 
  112 #define JAS_INTTOFIX(fix_t, fracbits, x) \ 
  113         JAS_CAST(fix_t, (x) << (fracbits)) 
  116 #define JAS_FIXTOINT(fix_t, fracbits, x) \ 
  117         JAS_CAST(int, (x) >> (fracbits)) 
  120 #define JAS_FIXTODBL(fix_t, fracbits, x) \ 
  121         (JAS_CAST(double, x) / (JAS_CAST(fix_t, 1) << (fracbits))) 
  124 #define JAS_DBLTOFIX(fix_t, fracbits, x) \ 
  125         JAS_CAST(fix_t, ((x) * JAS_CAST(double, JAS_CAST(fix_t, 1) << (fracbits)))) 
  138 #if !defined(DEBUG_OVERFLOW) 
  139 #define JAS_FIX_ADD                     JAS_FIX_ADD_FAST 
  141 #define JAS_FIX_ADD                     JAS_FIX_ADD_OFLOW 
  145 #define JAS_FIX_ADD_FAST(fix_t, fracbits, x, y) ((x) + (y)) 
  148 #define JAS_FIX_ADD_OFLOW(fix_t, fracbits, x, y) \ 
  150           (((y) >= 0) ? ((x) + (y) >= 0 || JAS_FIX_OFLOW(), (x) + (y)) : \ 
  152           (((y) >= 0) ? ((x) + (y)) : ((x) + (y) < 0 || JAS_FIX_OFLOW(), \ 
  156 #if !defined(DEBUG_OVERFLOW) 
  157 #define JAS_FIX_MUL                     JAS_FIX_MUL_FAST 
  159 #define JAS_FIX_MUL                     JAS_FIX_MUL_OFLOW 
  164 #define JAS_FIX_MUL_FAST(fix_t, fracbits, bigfix_t, x, y) \ 
  165         JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y)) >> \ 
  170 #define JAS_FIX_MUL_OFLOW(fix_t, fracbits, bigfix_t, x, y) \ 
  171         ((JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> (fracbits)) == \ 
  172           JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \ 
  174           JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \ 
  175           (fracbits))) : JAS_FIX_OFLOW()) 
  178 #if !defined(DEBUG_OVERFLOW) 
  179 #define JAS_FIX_MULBYINT        JAS_FIX_MULBYINT_FAST 
  181 #define JAS_FIX_MULBYINT        JAS_FIX_MULBYINT_OFLOW 
  186 #define JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y) \ 
  187         JAS_CAST(fix_t, ((x) * (y))) 
  191 #define JAS_FIX_MULBYINT_OFLOW(fix_t, fracbits, x, y) \ 
  192         JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y) 
  195 #if !defined(DEBUG_OVERFLOW) 
  196 #define JAS_FIX_DIV                     JAS_FIX_DIV_FAST 
  198 #define JAS_FIX_DIV                     JAS_FIX_DIV_UFLOW 
  203 #define JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y) \ 
  204         JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) << (fracbits)) / (y)) 
  208 #define JAS_FIX_DIV_UFLOW(fix_t, fracbits, bigfix_t, x, y) \ 
  209         JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y) 
  212 #if !defined(DEBUG_OVERFLOW) 
  213 #define JAS_FIX_NEG                     JAS_FIX_NEG_FAST 
  215 #define JAS_FIX_NEG                     JAS_FIX_NEG_OFLOW 
  219 #define JAS_FIX_NEG_FAST(fix_t, fracbits, x) \ 
  225 #define JAS_FIX_NEG_OFLOW(fix_t, fracbits, x) \ 
  226         (((x) < 0) ? (-(x) > 0 || JAS_FIX_OFLOW(), -(x)) : (-(x))) 
  229 #if !defined(DEBUG_OVERFLOW) 
  230 #define JAS_FIX_ASL                     JAS_FIX_ASL_FAST 
  232 #define JAS_FIX_ASL                     JAS_FIX_ASL_OFLOW 
  237 #define JAS_FIX_ASL_FAST(fix_t, fracbits, x, n) \ 
  242 #define JAS_FIX_ASL_OFLOW(fix_t, fracbits, x, n) \ 
  243         ((((x) << (n)) >> (n)) == (x) || JAS_FIX_OFLOW(), (x) << (n)) 
  246 #if !defined(DEBUG_OVERFLOW) 
  247 #define JAS_FIX_ASR                     JAS_FIX_ASR_FAST 
  249 #define JAS_FIX_ASR                     JAS_FIX_ASR_UFLOW 
  254 #define JAS_FIX_ASR_FAST(fix_t, fracbits, x, n) \ 
  259 #define JAS_FIX_ASR_UFLOW(fix_t, fracbits, x, n) \ 
  260         JAS_FIX_ASR_FAST(fix_t, fracbits, x, n) 
  267 #define JAS_FIX_SUB(fix_t, fracbits, x, y) \ 
  268         JAS_FIX_ADD(fix_t, fracbits, x, JAS_FIX_NEG(fix_t, fracbits, y)) 
  271 #define JAS_FIX_PLUSEQ(fix_t, fracbits, x, y) \ 
  272         ((x) = JAS_FIX_ADD(fix_t, fracbits, x, y)) 
  275 #define JAS_FIX_MINUSEQ(fix_t, fracbits, x, y) \ 
  276         ((x) = JAS_FIX_SUB(fix_t, fracbits, x, y)) 
  279 #define JAS_FIX_MULEQ(fix_t, fracbits, bigfix_t, x, y) \ 
  280         ((x) = JAS_FIX_MUL(fix_t, fracbits, bigfix_t, x, y)) 
  287 #define JAS_FIX_ABS(fix_t, fracbits, x) \ 
  288         (((x) >= 0) ? (x) : (JAS_FIX_NEG(fix_t, fracbits, x))) 
  291 #define JAS_FIX_ISINT(fix_t, fracbits, x) \ 
  292         (JAS_FIX_FLOOR(fix_t, fracbits, x) == (x)) 
  295 #define JAS_FIX_SGN(fix_t, fracbits, x) \ 
  296         ((x) >= 0 ? 1 : (-1)) 
  303 #define JAS_FIX_CMP(fix_t, fracbits, x, y) \ 
  304         ((x) > (y) ? 1 : (((x) == (y)) ? 0 : (-1))) 
  307 #define JAS_FIX_LT(fix_t, fracbits, x, y) \ 
  311 #define JAS_FIX_LTE(fix_t, fracbits, x, y) \ 
  315 #define JAS_FIX_GT(fix_t, fracbits, x, y) \ 
  319 #define JAS_FIX_GTE(fix_t, fracbits, x, y) \ 
  327 #define JAS_FIX_ROUND(fix_t, fracbits, x) \ 
  328         (((x) < 0) ? JAS_FIX_FLOOR(fix_t, fracbits, JAS_FIX_ADD(fix_t, fracbits, \ 
  329           (x), JAS_FIX_HALF(fix_t, fracbits))) : \ 
  330           JAS_FIX_NEG(fix_t, fracbits, JAS_FIX_FLOOR(fix_t, fracbits, \ 
  331           JAS_FIX_ADD(fix_t, fracbits, (-(x)), JAS_FIX_HALF(fix_t, fracbits))))) 
  335 #define JAS_FIX_FLOOR(fix_t, fracbits, x) \ 
  336         ((x) & (~((JAS_CAST(fix_t, 1) << (fracbits)) - 1))) 
  340 #define JAS_FIX_TRUNC(fix_t, fracbits, x) \ 
  341         (((x) >= 0) ? JAS_FIX_FLOOR(fix_t, fracbits, x) : \ 
  342           JAS_FIX_CEIL(fix_t, fracbits, x)) 
  350 #define JAS_FIX_OFLOW() \ 
  351         jas_eprintf("overflow error: file %s, line %d\n", __FILE__, __LINE__) 
  354 #define JAS_FIX_UFLOW() \ 
  355         jas_eprintf("underflow error: file %s, line %d\n", __FILE__, __LINE__)