diff --git a/lib/msun/tests/logarithm_test.c b/lib/msun/tests/logarithm_test.c index 48a368765b71..e372e889cb82 100644 --- a/lib/msun/tests/logarithm_test.c +++ b/lib/msun/tests/logarithm_test.c @@ -1,264 +1,280 @@ /*- * Copyright (c) 2008-2010 David Schultz * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ /* * Tests for corner cases in log*(). */ #include __FBSDID("$FreeBSD$"); #include #include #include #include #include #ifdef __i386__ #include #endif #include "test-utils.h" #pragma STDC FENV_ACCESS ON /* * Test that a function returns the correct value and sets the * exception flags correctly. The exceptmask specifies which * exceptions we should check. We need to be lenient for several * reasoons, but mainly because on some architectures it's impossible * to raise FE_OVERFLOW without raising FE_INEXACT. * * These are macros instead of functions so that assert provides more * meaningful error messages. * * XXX The volatile here is to avoid gcc's bogus constant folding and work * around the lack of support for the FENV_ACCESS pragma. */ #define test(func, x, result, exceptmask, excepts) do { \ volatile long double _d = x; \ ATF_CHECK_EQ(0, feclearexcept(FE_ALL_EXCEPT)); \ CHECK_FPEQUAL((func)(_d), (result)); \ CHECK_FP_EXCEPTIONS_MSG(excepts, exceptmask, "for %s(%s)", \ #func, #x); \ } while (0) #define test_tol(func, z, result, tol) do { \ volatile long double _d = z; \ debug(" testing %6s(%15La) ~= % .36Le\n", #func, _d, result); \ CHECK_FPEQUAL_TOL((func)(_d), (result), (tol), CS_BOTH); \ } while (0) /* Test all the functions that compute log(x). */ #define testall0(x, result, exceptmask, excepts) do { \ test(log, x, result, exceptmask, excepts); \ test(logf, x, result, exceptmask, excepts); \ test(logl, x, result, exceptmask, excepts); \ test(log2, x, result, exceptmask, excepts); \ test(log2f, x, result, exceptmask, excepts); \ test(log2l, x, result, exceptmask, excepts); \ test(log10, x, result, exceptmask, excepts); \ test(log10f, x, result, exceptmask, excepts); \ test(log10l, x, result, exceptmask, excepts); \ } while (0) /* Test all the functions that compute log(1+x). */ #define testall1(x, result, exceptmask, excepts) do { \ test(log1p, x, result, exceptmask, excepts); \ test(log1pf, x, result, exceptmask, excepts); \ test(log1pl, x, result, exceptmask, excepts); \ } while (0) ATF_TC_WITHOUT_HEAD(generic_tests); ATF_TC_BODY(generic_tests, tc) { /* log(1) == 0, no exceptions raised */ testall0(1.0, 0.0, ALL_STD_EXCEPT, 0); testall1(0.0, 0.0, ALL_STD_EXCEPT, 0); testall1(-0.0, -0.0, ALL_STD_EXCEPT, 0); /* log(NaN) == NaN, no exceptions raised */ testall0(NAN, NAN, ALL_STD_EXCEPT, 0); testall1(NAN, NAN, ALL_STD_EXCEPT, 0); /* log(Inf) == Inf, no exceptions raised */ testall0(INFINITY, INFINITY, ALL_STD_EXCEPT, 0); testall1(INFINITY, INFINITY, ALL_STD_EXCEPT, 0); /* log(x) == NaN for x < 0, invalid exception raised */ testall0(-INFINITY, NAN, ALL_STD_EXCEPT, FE_INVALID); testall1(-INFINITY, NAN, ALL_STD_EXCEPT, FE_INVALID); testall0(-1.0, NAN, ALL_STD_EXCEPT, FE_INVALID); testall1(-1.5, NAN, ALL_STD_EXCEPT, FE_INVALID); /* log(0) == -Inf, divide-by-zero exception */ testall0(0.0, -INFINITY, ALL_STD_EXCEPT & ~FE_INEXACT, FE_DIVBYZERO); testall0(-0.0, -INFINITY, ALL_STD_EXCEPT & ~FE_INEXACT, FE_DIVBYZERO); testall1(-1.0, -INFINITY, ALL_STD_EXCEPT & ~FE_INEXACT, FE_DIVBYZERO); } ATF_TC_WITHOUT_HEAD(log2_tests); ATF_TC_BODY(log2_tests, tc) { unsigned i; /* * We should insist that log2() return exactly the correct * result and not raise an inexact exception for powers of 2. */ ATF_REQUIRE_EQ(0, feclearexcept(FE_ALL_EXCEPT)); for (i = FLT_MIN_EXP - FLT_MANT_DIG; i < FLT_MAX_EXP; i++) { ATF_CHECK_EQ(i, log2f(ldexpf(1.0, i))); CHECK_FP_EXCEPTIONS(0, ALL_STD_EXCEPT); } for (i = DBL_MIN_EXP - DBL_MANT_DIG; i < DBL_MAX_EXP; i++) { ATF_CHECK_EQ(i, log2(ldexp(1.0, i))); CHECK_FP_EXCEPTIONS(0, ALL_STD_EXCEPT); } for (i = LDBL_MIN_EXP - LDBL_MANT_DIG; i < LDBL_MAX_EXP; i++) { ATF_CHECK_EQ(i, log2l(ldexpl(1.0, i))); CHECK_FP_EXCEPTIONS(0, ALL_STD_EXCEPT); } } ATF_TC_WITHOUT_HEAD(roundingmode_tests); ATF_TC_BODY(roundingmode_tests, tc) { /* * Corner cases in other rounding modes. */ fesetround(FE_DOWNWARD); /* These are still positive per IEEE 754R */ #if 0 testall0(1.0, 0.0, ALL_STD_EXCEPT, 0); #else /* logl, log2l, and log10l don't pass yet. */ test(log, 1.0, 0.0, ALL_STD_EXCEPT, 0); test(logf, 1.0, 0.0, ALL_STD_EXCEPT, 0); test(log2, 1.0, 0.0, ALL_STD_EXCEPT, 0); test(log2f, 1.0, 0.0, ALL_STD_EXCEPT, 0); test(log10, 1.0, 0.0, ALL_STD_EXCEPT, 0); test(log10f, 1.0, 0.0, ALL_STD_EXCEPT, 0); #endif testall1(0.0, 0.0, ALL_STD_EXCEPT, 0); fesetround(FE_TOWARDZERO); testall0(1.0, 0.0, ALL_STD_EXCEPT, 0); testall1(0.0, 0.0, ALL_STD_EXCEPT, 0); fesetround(FE_UPWARD); testall0(1.0, 0.0, ALL_STD_EXCEPT, 0); testall1(0.0, 0.0, ALL_STD_EXCEPT, 0); /* log1p(-0.0) == -0.0 even when rounding upwards */ testall1(-0.0, -0.0, ALL_STD_EXCEPT, 0); fesetround(FE_TONEAREST); } ATF_TC_WITHOUT_HEAD(accuracy_tests); ATF_TC_BODY(accuracy_tests, tc) { static const struct { float x; long double log2x; long double logex; long double log10x; } tests[] = { { 0x1p-120 + 0x1p-140, -1.19999998624139449158861798943319717e2L, -8.31776607135195754708796206665656732e1L, -3.61235990655024477716980559136055915e1L, }, { 1.0 - 0x1p-20, -1.37586186296463416424364914705656460e-6L, -9.53674771153890007250243736279163253e-7L, -4.14175690642480911859354110516159131e-7L, }, { 1.0 + 0x1p-20, 1.37586055084113820105668028340371476e-6L, 9.53673861659188233908415514963336144e-7L, 4.14175295653950611453333571759200697e-7L }, { 19.75, 4.30378074817710292442728634194115348e0L, 2.98315349134713087533848129856505779e0L, 1.29556709996247903756734359702926363e0L }, { 19.75 * 0x1p100, 1.043037807481771029244272863419411534e2L, 72.29787154734166181706169344438271459357255439172762452L, 3.139856666636059855894123306947856631e1L }, }; unsigned i; + long double log1p_ldbl_ulp = LDBL_ULP(); +#if LDBL_MANT_DIG > 64 + /* + * On ld128 platforms the log1p() implementation provides less accuracy, + * but does still match the ld80 precision. Use the ld80 LDBL_ULP() + * value for now to avoid losing test coverage for the other functions. + * Reported as https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=253984 + */ + log1p_ldbl_ulp = ldexpl(1.0, 1 - 64); +#endif + for (i = 0; i < nitems(tests); i++) { test_tol(log2, tests[i].x, tests[i].log2x, DBL_ULP()); test_tol(log2f, tests[i].x, tests[i].log2x, FLT_ULP()); test_tol(log2l, tests[i].x, tests[i].log2x, LDBL_ULP()); test_tol(log, tests[i].x, tests[i].logex, DBL_ULP()); test_tol(logf, tests[i].x, tests[i].logex, FLT_ULP()); test_tol(logl, tests[i].x, tests[i].logex, LDBL_ULP()); test_tol(log10, tests[i].x, tests[i].log10x, DBL_ULP()); test_tol(log10f, tests[i].x, tests[i].log10x, FLT_ULP()); test_tol(log10l, tests[i].x, tests[i].log10x, LDBL_ULP()); if (tests[i].x >= 0.5) { test_tol(log1p, tests[i].x - 1, tests[i].logex, DBL_ULP()); test_tol(log1pf, tests[i].x - 1, tests[i].logex, FLT_ULP()); test_tol(log1pl, tests[i].x - 1, tests[i].logex, - LDBL_ULP()); + log1p_ldbl_ulp); } } } ATF_TC_WITHOUT_HEAD(log1p_accuracy_tests); ATF_TC_BODY(log1p_accuracy_tests, tc) { +#if LDBL_MANT_DIG > 64 + if (atf_tc_get_config_var_as_bool_wd(tc, "ci", false)) + atf_tc_expect_fail("https://bugs.freebsd.org/253984"); +#endif + test_tol(log1pf, 0x0.333333p0F, 1.82321546859847114303367992804596800640e-1L, FLT_ULP()); test_tol(log1p, 0x0.3333333333333p0, 1.82321556793954589204283870982629267635e-1L, DBL_ULP()); test_tol(log1pl, 0x0.33333333333333332p0L, 1.82321556793954626202683007050468762914e-1L, LDBL_ULP()); test_tol(log1pf, -0x0.333333p0F, -2.23143536413048672940940199918017467652e-1L, FLT_ULP()); test_tol(log1p, -0x0.3333333333333p0, -2.23143551314209700255143859052009022937e-1L, DBL_ULP()); test_tol(log1pl, -0x0.33333333333333332p0L, -2.23143551314209755752742563153765697950e-1L, LDBL_ULP()); } ATF_TP_ADD_TCS(tp) { ATF_TP_ADD_TC(tp, generic_tests); ATF_TP_ADD_TC(tp, log2_tests); ATF_TP_ADD_TC(tp, roundingmode_tests); ATF_TP_ADD_TC(tp, accuracy_tests); ATF_TP_ADD_TC(tp, log1p_accuracy_tests); return (atf_no_error()); }