mirror of
https://github.com/jart/cosmopolitan.git
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66 lines
3.5 KiB
C
66 lines
3.5 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 2021 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/runtime/gc.internal.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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TEST(log2l, test) {
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EXPECT_STREQ("1", gc(xdtoal(log2l(2))));
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EXPECT_STREQ("NAN", gc(xdtoal(log2l(NAN))));
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EXPECT_STREQ("0", gc(xdtoal(log2l(1))));
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EXPECT_STREQ("INFINITY", gc(xdtoal(log2l(INFINITY))));
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EXPECT_STREQ("-INFINITY", gc(xdtoal(log2l(0))));
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EXPECT_STREQ("-INFINITY", gc(xdtoal(log2l(-0.))));
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EXPECT_STREQ("-NAN", gc(xdtoal(log2l(-1))));
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EXPECT_STREQ("-NAN", gc(xdtoal(log2l(-2))));
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}
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TEST(log2, test) {
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EXPECT_STREQ("1", gc(xdtoa(log2(2))));
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EXPECT_STREQ("2", gc(xdtoa(log2(2 * 2))));
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EXPECT_STREQ("NAN", gc(xdtoa(log2(NAN))));
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EXPECT_STREQ("0", gc(xdtoa(log2(1))));
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EXPECT_STREQ("INFINITY", gc(xdtoa(log2(INFINITY))));
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EXPECT_STREQ("-INFINITY", gc(xdtoa(log2(0))));
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EXPECT_STREQ("-INFINITY", gc(xdtoa(log2(-0.))));
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EXPECT_STREQ("-NAN", gc(xdtoa(log2(-1))));
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EXPECT_STREQ("-NAN", gc(xdtoa(log2(-2))));
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}
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TEST(log2f, test) {
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EXPECT_STREQ("1", gc(xdtoaf(log2f(2))));
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EXPECT_STREQ("NAN", gc(xdtoaf(log2f(NAN))));
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EXPECT_STREQ("0", gc(xdtoaf(log2f(1))));
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EXPECT_STREQ("INFINITY", gc(xdtoaf(log2f(INFINITY))));
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EXPECT_STREQ("-INFINITY", gc(xdtoaf(log2f(0))));
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EXPECT_STREQ("-INFINITY", gc(xdtoaf(log2f(-0.))));
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EXPECT_STREQ("-NAN", gc(xdtoaf(log2f(-1))));
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EXPECT_STREQ("-NAN", gc(xdtoaf(log2f(-2))));
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}
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BENCH(log2, bench) {
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double _log2(double) asm("log2");
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float _log2f(float) asm("log2f");
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long double _log2l(long double) asm("log2l");
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EZBENCH2("log2", donothing, _log2(.7)); /* ~9ns */
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EZBENCH2("log2f", donothing, _log2f(.7)); /* ~6ns */
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EZBENCH2("log2l", donothing, _log2l(.7)); /* ~21ns */
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}
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