78 #include <jasper/jas_config.h>
80 #include <jasper/jas_types.h>
91 #define JAS_FIX_ZERO(fix_t, fracbits) \
95 #define JAS_FIX_ONE(fix_t, fracbits) \
96 (JAS_CAST(fix_t, 1) << (fracbits))
99 #define JAS_FIX_HALF(fix_t, fracbits) \
100 (JAS_CAST(fix_t, 1) << ((fracbits) - 1))
107 #define JAS_INTTOFIX(fix_t, fracbits, x) \
108 JAS_CAST(fix_t, (x) << (fracbits))
111 #define JAS_FIXTOINT(fix_t, fracbits, x) \
112 JAS_CAST(int, (x) >> (fracbits))
115 #define JAS_FIXTODBL(fix_t, fracbits, x) \
116 (JAS_CAST(double, x) / (JAS_CAST(fix_t, 1) << (fracbits)))
119 #define JAS_DBLTOFIX(fix_t, fracbits, x) \
120 JAS_CAST(fix_t, ((x) * JAS_CAST(double, JAS_CAST(fix_t, 1) << (fracbits))))
133 #if !defined(DEBUG_OVERFLOW)
134 #define JAS_FIX_ADD JAS_FIX_ADD_FAST
136 #define JAS_FIX_ADD JAS_FIX_ADD_OFLOW
140 #define JAS_FIX_ADD_FAST(fix_t, fracbits, x, y) ((x) + (y))
143 #define JAS_FIX_ADD_OFLOW(fix_t, fracbits, x, y) \
145 (((y) >= 0) ? ((x) + (y) >= 0 || JAS_FIX_OFLOW(), (x) + (y)) : \
147 (((y) >= 0) ? ((x) + (y)) : ((x) + (y) < 0 || JAS_FIX_OFLOW(), \
151 #if !defined(DEBUG_OVERFLOW)
152 #define JAS_FIX_MUL JAS_FIX_MUL_FAST
154 #define JAS_FIX_MUL JAS_FIX_MUL_OFLOW
159 #define JAS_FIX_MUL_FAST(fix_t, fracbits, bigfix_t, x, y) \
160 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y)) >> \
165 #define JAS_FIX_MUL_OFLOW(fix_t, fracbits, bigfix_t, x, y) \
166 ((JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> (fracbits)) == \
167 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \
169 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) * JAS_CAST(bigfix_t, y) >> \
170 (fracbits))) : JAS_FIX_OFLOW())
173 #if !defined(DEBUG_OVERFLOW)
174 #define JAS_FIX_MULBYINT JAS_FIX_MULBYINT_FAST
176 #define JAS_FIX_MULBYINT JAS_FIX_MULBYINT_OFLOW
181 #define JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y) \
182 JAS_CAST(fix_t, ((x) * (y)))
186 #define JAS_FIX_MULBYINT_OFLOW(fix_t, fracbits, x, y) \
187 JAS_FIX_MULBYINT_FAST(fix_t, fracbits, x, y)
190 #if !defined(DEBUG_OVERFLOW)
191 #define JAS_FIX_DIV JAS_FIX_DIV_FAST
193 #define JAS_FIX_DIV JAS_FIX_DIV_UFLOW
198 #define JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y) \
199 JAS_CAST(fix_t, (JAS_CAST(bigfix_t, x) << (fracbits)) / (y))
203 #define JAS_FIX_DIV_UFLOW(fix_t, fracbits, bigfix_t, x, y) \
204 JAS_FIX_DIV_FAST(fix_t, fracbits, bigfix_t, x, y)
207 #if !defined(DEBUG_OVERFLOW)
208 #define JAS_FIX_NEG JAS_FIX_NEG_FAST
210 #define JAS_FIX_NEG JAS_FIX_NEG_OFLOW
214 #define JAS_FIX_NEG_FAST(fix_t, fracbits, x) \
220 #define JAS_FIX_NEG_OFLOW(fix_t, fracbits, x) \
221 (((x) < 0) ? (-(x) > 0 || JAS_FIX_OFLOW(), -(x)) : (-(x)))
224 #if !defined(DEBUG_OVERFLOW)
225 #define JAS_FIX_ASL JAS_FIX_ASL_FAST
227 #define JAS_FIX_ASL JAS_FIX_ASL_OFLOW
232 #define JAS_FIX_ASL_FAST(fix_t, fracbits, x, n) \
237 #define JAS_FIX_ASL_OFLOW(fix_t, fracbits, x, n) \
238 ((((x) << (n)) >> (n)) == (x) || JAS_FIX_OFLOW(), (x) << (n))
241 #if !defined(DEBUG_OVERFLOW)
242 #define JAS_FIX_ASR JAS_FIX_ASR_FAST
244 #define JAS_FIX_ASR JAS_FIX_ASR_UFLOW
249 #define JAS_FIX_ASR_FAST(fix_t, fracbits, x, n) \
254 #define JAS_FIX_ASR_UFLOW(fix_t, fracbits, x, n) \
255 JAS_FIX_ASR_FAST(fix_t, fracbits, x, n)
262 #define JAS_FIX_SUB(fix_t, fracbits, x, y) \
263 JAS_FIX_ADD(fix_t, fracbits, x, JAS_FIX_NEG(fix_t, fracbits, y))
266 #define JAS_FIX_PLUSEQ(fix_t, fracbits, x, y) \
267 ((x) = JAS_FIX_ADD(fix_t, fracbits, x, y))
270 #define JAS_FIX_MINUSEQ(fix_t, fracbits, x, y) \
271 ((x) = JAS_FIX_SUB(fix_t, fracbits, x, y))
274 #define JAS_FIX_MULEQ(fix_t, fracbits, bigfix_t, x, y) \
275 ((x) = JAS_FIX_MUL(fix_t, fracbits, bigfix_t, x, y))
282 #define JAS_FIX_ABS(fix_t, fracbits, x) \
283 (((x) >= 0) ? (x) : (JAS_FIX_NEG(fix_t, fracbits, x)))
286 #define JAS_FIX_ISINT(fix_t, fracbits, x) \
287 (JAS_FIX_FLOOR(fix_t, fracbits, x) == (x))
290 #define JAS_FIX_SGN(fix_t, fracbits, x) \
291 ((x) >= 0 ? 1 : (-1))
298 #define JAS_FIX_CMP(fix_t, fracbits, x, y) \
299 ((x) > (y) ? 1 : (((x) == (y)) ? 0 : (-1)))
302 #define JAS_FIX_LT(fix_t, fracbits, x, y) \
306 #define JAS_FIX_LTE(fix_t, fracbits, x, y) \
310 #define JAS_FIX_GT(fix_t, fracbits, x, y) \
314 #define JAS_FIX_GTE(fix_t, fracbits, x, y) \
322 #define JAS_FIX_ROUND(fix_t, fracbits, x) \
323 (((x) < 0) ? JAS_FIX_FLOOR(fix_t, fracbits, JAS_FIX_ADD(fix_t, fracbits, \
324 (x), JAS_FIX_HALF(fix_t, fracbits))) : \
325 JAS_FIX_NEG(fix_t, fracbits, JAS_FIX_FLOOR(fix_t, fracbits, \
326 JAS_FIX_ADD(fix_t, fracbits, (-(x)), JAS_FIX_HALF(fix_t, fracbits)))))
330 #define JAS_FIX_FLOOR(fix_t, fracbits, x) \
331 ((x) & (~((JAS_CAST(fix_t, 1) << (fracbits)) - 1)))
335 #define JAS_FIX_TRUNC(fix_t, fracbits, x) \
336 (((x) >= 0) ? JAS_FIX_FLOOR(fix_t, fracbits, x) : \
337 JAS_FIX_CEIL(fix_t, fracbits, x))
345 #define JAS_FIX_OFLOW() \
346 jas_eprintf("overflow error: file %s, line %d\n", __FILE__, __LINE__)
349 #define JAS_FIX_UFLOW() \
350 jas_eprintf("underflow error: file %s, line %d\n", __FILE__, __LINE__)