static void coverage_01032011 (void) { mpfr_t val, cval, sval, svalf; int status_f, status; mpfr_init2 (val, MPFR_PREC_MIN); mpfr_init2 (cval, MPFR_PREC_MIN); mpfr_init2 (sval, MPFR_PREC_MIN); mpfr_init2 (svalf, MPFR_PREC_MIN); mpfr_set_str1 (val, "-0.7"); status_f = mpfr_sincos_fast (svalf, NULL, val, MPFR_RNDN); status = mpfr_sin_cos (sval, cval, val, MPFR_RNDN); if (! mpfr_equal_p (svalf, sval) || SIGN (status_f) != SIGN (status)) { printf ("mpfr_sincos_fast differ from mpfr_sin_cos result:\n" " sin fast is "); mpfr_dump (svalf); printf (" sin is "); mpfr_dump (sval); printf ("status_f = %d, status = %d\n", status_f, status); exit (1); } mpfr_clears(val, cval, sval, svalf, (mpfr_ptr) 0); }
/* check that mpfr_sin_cos and test_mpfr_sincos_fast agree */ static void test_mpfr_sincos_fast (void) { mpfr_t x, y, z, yref, zref, h; mpfr_prec_t p = 1000; int i, inex, inexref; mpfr_rnd_t r; mpfr_init2 (x, p); mpfr_init2 (y, p); mpfr_init2 (z, p); mpfr_init2 (yref, p); mpfr_init2 (zref, p); mpfr_init2 (h, p); mpfr_set_ui (x, 0, MPFR_RNDN); /* we generate a random value x, compute sin(x) and cos(x) with both mpfr_sin_cos and mpfr_sincos_fast, and check the values and the flags agree */ for (i = 0; i < 100; i++) { mpfr_urandomb (h, RANDS); mpfr_add (x, x, h, MPFR_RNDN); r = RND_RAND (); inexref = mpfr_sin_cos (yref, zref, x, r); inex = mpfr_sincos_fast (y, z, x, r); if (mpfr_cmp (y, yref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree\n"); printf ("x="); mpfr_dump (x); printf ("rnd=%s\n", mpfr_print_rnd_mode (r)); printf ("yref="); mpfr_dump (yref); printf ("y="); mpfr_dump (y); exit (1); } if (mpfr_cmp (z, zref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree\n"); printf ("x="); mpfr_dump (x); printf ("rnd=%s\n", mpfr_print_rnd_mode (r)); printf ("zref="); mpfr_dump (zref); printf ("z="); mpfr_dump (z); exit (1); } if (inex != inexref) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree\n"); printf ("x="); mpfr_dump (x); printf ("rnd=%s\n", mpfr_print_rnd_mode (r)); printf ("inexref=%d inex=%d\n", inexref, inex); exit (1); } } mpfr_clear (x); mpfr_clear (y); mpfr_clear (z); mpfr_clear (yref); mpfr_clear (zref); mpfr_clear (h); }
static int mpfr_cos_fast (mpfr_ptr y, mpfr_srcptr x, mpfr_rnd_t rnd_mode) { int inex; inex = mpfr_sincos_fast (NULL, y, x, rnd_mode); inex = inex >> 2; /* 0: exact, 1: rounded up, 2: rounded down */ return (inex == 2) ? -1 : inex; }
static void bug20091013 (void) { mpfr_t x, y, z, yref, zref; mpfr_prec_t p = 1000; int inex, inexref; mpfr_rnd_t r = MPFR_RNDN; mpfr_init2 (x, p); mpfr_init2 (y, p); mpfr_init2 (z, p); mpfr_init2 (yref, p); mpfr_init2 (zref, p); mpfr_set_str (x, "3.240ff3fdcb1ee7cd667b96287593ae24e20fb63ed7c2d5bf4bd0f2cc5509283b04e7628e66382605f14ed5967cef15296041539a1bdaa626c777c7fbb6f2068414759b78cee14f37848689b3a170f583656be4e0837f464d8210556a3a822d4ecfdd59f4e0d5fdb76bf7e15b8a57234e2160b98e14c17bbdf27c4643b8@1", 16, MPFR_RNDN); inexref = mpfr_sin_cos (yref, zref, x, r); inex = mpfr_sincos_fast (y, z, x, r); if (mpfr_cmp (y, yref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091013)\n"); printf ("yref="); mpfr_dump (yref); printf ("y="); mpfr_dump (y); exit (1); } if (mpfr_cmp (z, zref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091013)\n"); printf ("zref="); mpfr_dump (zref); printf ("z="); mpfr_dump (z); exit (1); } /* sin(x) is rounded down and cos(x) is rounded down, thus we should get 2+4*2 = 10 as return value */ if (inex != inexref) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091013)\n"); printf ("inexref=%d inex=%d (10 expected)\n", inexref, inex); exit (1); } mpfr_clear (x); mpfr_clear (y); mpfr_clear (z); mpfr_clear (yref); mpfr_clear (zref); }
/* Note: with the sin_cos.c code before r6507, the disagreement occurs only on the return ("inexact") value, which is new in r6444. */ static void bug20091008 (void) { mpfr_t x, y, z, yref, zref; mpfr_prec_t p = 1000; int inex, inexref; mpfr_rnd_t r = MPFR_RNDN; mpfr_init2 (x, p); mpfr_init2 (y, p); mpfr_init2 (z, p); mpfr_init2 (yref, p); mpfr_init2 (zref, p); mpfr_set_str (x, "c.91813724e28ef6a711d33e6505984699daef7fe93636c1ed5d0168bc96989cc6802f7f9e405c902ec62fb90cd39c9d21084c8ad8b5af4c4aa87bf402e2e4a78e6fe1ffeb6dbbbdbbc2983c196c518966ccc1e094ed39ee77984ef2428069d65de37928e75247edbe7007245e682616b5ebbf05f2fdefc74ad192024f10", 16, MPFR_RNDN); inexref = mpfr_sin_cos (yref, zref, x, r); inex = mpfr_sincos_fast (y, z, x, r); if (mpfr_cmp (y, yref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091008)\n"); printf ("yref="); mpfr_dump (yref); printf ("y="); mpfr_dump (y); exit (1); } if (mpfr_cmp (z, zref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091008)\n"); printf ("zref="); mpfr_dump (zref); printf ("z="); mpfr_dump (z); exit (1); } /* sin(x) is rounded up, cos(x) is rounded up too, thus we should get 5 for the return value */ if (inex != inexref) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091008)\n"); printf ("inexref=%d inex=%d (5 expected)\n", inexref, inex); exit (1); } mpfr_clear (x); mpfr_clear (y); mpfr_clear (z); mpfr_clear (yref); mpfr_clear (zref); }
static void bug20091007 (void) { mpfr_t x, y, z, yref, zref; mpfr_prec_t p = 1000; int inex, inexref; mpfr_rnd_t r = MPFR_RNDZ; mpfr_init2 (x, p); mpfr_init2 (y, p); mpfr_init2 (z, p); mpfr_init2 (yref, p); mpfr_init2 (zref, p); mpfr_set_str (x, "1.9ecdc22ba77a5ab2560f7e84289e2a328906f47377ea3fd4c82d1bb2f13ee05c032cffc1933eadab7b0a5498e03e3bd0508968e59c25829d97a0b54f20cd4662c8dfffa54e714de41fc8ee3e0e0b244d110a194db05b70022b7d77f88955d415b09f17dd404576098dc51a583a3e49c35839551646e880c7eb790a01a4@1", 16, MPFR_RNDN); inexref = mpfr_sin_cos (yref, zref, x, r); inex = mpfr_sincos_fast (y, z, x, r); if (mpfr_cmp (y, yref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091007)\n"); printf ("yref="); mpfr_dump (yref); printf ("y="); mpfr_dump (y); exit (1); } if (mpfr_cmp (z, zref)) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091007)\n"); printf ("zref="); mpfr_dump (zref); printf ("z="); mpfr_dump (z); exit (1); } if (inex != inexref) { printf ("mpfr_sin_cos and mpfr_sincos_fast disagree (bug20091007)\n"); printf ("inexref=%d inex=%d\n", inexref, inex); exit (1); } mpfr_clear (x); mpfr_clear (y); mpfr_clear (z); mpfr_clear (yref); mpfr_clear (zref); }