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https://github.com/jart/cosmopolitan.git
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71 lines
3.6 KiB
C
71 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/math.h"
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#include "libc/mem/gc.h"
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#include "libc/stdio/stdio.h"
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#include "libc/testlib/ezbench.h"
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#include "libc/testlib/testlib.h"
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#include "libc/x/x.h"
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#include "libc/x/xasprintf.h"
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double _exp(double) asm("exp");
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float _expf(float) asm("expf");
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long double _expl(long double) asm("expl");
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TEST(expl, test) {
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EXPECT_STREQ("1", _gc(xdtoal(_expl(0))));
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EXPECT_STREQ("1", _gc(xdtoal(_expl(-0.))));
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EXPECT_STREQ("INFINITY", _gc(xdtoal(_expl(INFINITY))));
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EXPECT_STREQ("0", _gc(xdtoal(_expl(-INFINITY))));
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EXPECT_STREQ("NAN", _gc(xdtoal(_expl(NAN))));
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// EXPECT_STREQ("0", _gc(xdtoal(_expl(-132098844872390))));
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EXPECT_STREQ("INFINITY", _gc(xdtoal(_expl(132098844872390))));
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}
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TEST(exp, test) {
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EXPECT_STREQ("1", _gc(xdtoa(_exp(0))));
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EXPECT_STREQ("1", _gc(xdtoa(_exp(-0.))));
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EXPECT_STREQ("INFINITY", _gc(xdtoa(_exp(INFINITY))));
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EXPECT_STREQ("0", _gc(xdtoa(_exp(-INFINITY))));
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EXPECT_STREQ("NAN", _gc(xdtoa(_exp(NAN))));
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EXPECT_STREQ("0", _gc(xdtoa(_exp(-132098844872390))));
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EXPECT_STREQ("INFINITY", _gc(xdtoa(_exp(132098844872390))));
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}
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TEST(expf, test) {
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EXPECT_STREQ("1", _gc(xdtoaf(_expf(0))));
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EXPECT_STREQ("1", _gc(xdtoaf(_expf(-0.))));
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EXPECT_STREQ("INFINITY", _gc(xdtoaf(_expf(INFINITY))));
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EXPECT_STREQ("0", _gc(xdtoaf(_expf(-INFINITY))));
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EXPECT_STREQ("NAN", _gc(xdtoaf(_expf(NAN))));
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EXPECT_STREQ("0", _gc(xdtoaf(_expf(-132098844872390))));
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EXPECT_STREQ("INFINITY", _gc(xdtoaf(_expf(132098844872390))));
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}
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TEST(exp, fun) {
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ASSERT_STREQ("7.389056", _gc(xasprintf("%f", _exp(2.0))));
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ASSERT_STREQ("6.389056", _gc(xasprintf("%f", expm1(2.0))));
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ASSERT_STREQ("6.389056", _gc(xasprintf("%f", _exp(2.0) - 1.0)));
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}
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BENCH(expl, bench) {
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EZBENCH2("exp", donothing, _exp(.7)); /* ~6ns */
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EZBENCH2("expf", donothing, _expf(.7)); /* ~5ns */
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EZBENCH2("expl", donothing, _expl(.7)); /* ~20ns */
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}
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