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__)