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cosmopolitan/test/libc/tinymath/hypot_test.c

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Implement better hypot function
2021-02-21 19:06:18 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
Pay off more technical debt This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
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#include "libc/mem/gc.internal.h"
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#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"
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double _hypot(double, double) asm("hypot");
float _hypotf(float, float) asm("hypotf");
long double _hypotl(long double, long double) asm("hypotl");
Improve signal handling and math - Polyfill ucontext_t on FreeBSD/OpenBSD/NetBSD - Add tests confirming signals can edit CPU state - Work towards supporting ZIP filesystem on bare metal - Add more tinymath unit tests for POSIX conformance - Add X87 and SSE status flags to crash report - Fix some bugs in blinkenlights - Fix llvm build breakage
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TEST(hypot, test) {
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EXPECT_STREQ("0", gc(xdtoa(_hypot(0, 0))));
EXPECT_STREQ("3", gc(xdtoa(_hypot(3, 0))));
EXPECT_STREQ("3", gc(xdtoa(_hypot(0, 3))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(3, 4))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(4, 3))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(3, -4))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(-4, 3))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(-3, 4))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(4, -3))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(-3, -4))));
EXPECT_STREQ("5", gc(xdtoa(_hypot(-4, -3))));
EXPECT_STREQ("1.4142135623731", gc(xdtoa(_hypot(1, 1))));
EXPECT_STREQ("1.4142135623731", gc(xdtoa(_hypot(1, -1))));
EXPECT_STREQ("1.4142135623731", gc(xdtoa(_hypot(-1, 1))));
EXPECT_STREQ("1.41421362601271", gc(xdtoa(_hypot(1.0000001, .99999999))));
EXPECT_STREQ("1.41421362601271", gc(xdtoa(_hypot(.99999999, 1.0000001))));
EXPECT_STREQ("1.4142135623731e+154", gc(xdtoa(_hypot(1e154, 1e154))));
EXPECT_STREQ("NAN", gc(xdtoa(_hypot(0, NAN))));
EXPECT_STREQ("NAN", gc(xdtoa(_hypot(NAN, 0))));
EXPECT_STREQ("NAN", gc(xdtoa(_hypot(NAN, NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoa(_hypot(INFINITY, 0))));
EXPECT_STREQ("INFINITY", gc(xdtoa(_hypot(0, INFINITY))));
EXPECT_STREQ("INFINITY", gc(xdtoa(_hypot(INFINITY, NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoa(_hypot(NAN, INFINITY))));
EXPECT_STREQ("INFINITY", gc(xdtoa(_hypot(INFINITY, INFINITY))));
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}
TEST(hypotf, test) {
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EXPECT_STREQ("0", gc(xdtoa(_hypotf(0, 0))));
EXPECT_STREQ("3", gc(xdtoa(_hypotf(3, 0))));
EXPECT_STREQ("3", gc(xdtoa(_hypotf(0, 3))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(3, 4))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(4, 3))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(3, -4))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(-4, 3))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(-3, 4))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(4, -3))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(-3, -4))));
EXPECT_STREQ("5", gc(xdtoa(_hypotf(-4, -3))));
EXPECT_STREQ("1.41421", gc(xdtoaf(_hypotf(1, 1))));
EXPECT_STREQ("1.41421", gc(xdtoaf(_hypotf(1, -1))));
EXPECT_STREQ("1.41421", gc(xdtoaf(_hypotf(-1, 1))));
EXPECT_STREQ("1.41421", gc(xdtoaf(_hypotf(1.000001, 0.999999))));
EXPECT_STREQ("1.41421", gc(xdtoaf(_hypotf(0.999999, 1.000001))));
EXPECT_STREQ("1.41421e+38", gc(xdtoaf(_hypotf(1e38, 1e38))));
EXPECT_STREQ("NAN", gc(xdtoaf(_hypotf(0, NAN))));
EXPECT_STREQ("NAN", gc(xdtoaf(_hypotf(NAN, 0))));
EXPECT_STREQ("NAN", gc(xdtoaf(_hypotf(NAN, NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(_hypotf(INFINITY, 0))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(_hypotf(0, INFINITY))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(_hypotf(INFINITY, NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(_hypotf(NAN, INFINITY))));
EXPECT_STREQ("INFINITY", gc(xdtoaf(_hypotf(INFINITY, INFINITY))));
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}
Further refine hypot implementation Thanks go to Fabian Giesen on Twitter for code review and advice.
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TEST(hypotll, test) {
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EXPECT_STREQ("0", gc(xdtoal(_hypotl(0, 0))));
EXPECT_STREQ("3", gc(xdtoal(_hypotl(3, 0))));
EXPECT_STREQ("3", gc(xdtoal(_hypotl(0, 3))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(3, 4))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(4, 3))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(3, -4))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(-4, 3))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(-3, 4))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(4, -3))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(-3, -4))));
EXPECT_STREQ("5", gc(xdtoal(_hypotl(-4, -3))));
EXPECT_STREQ("1.414213562373095", gc(xdtoal(_hypotl(1, 1))));
EXPECT_STREQ("1.414213562373095", gc(xdtoal(_hypotl(1, -1))));
EXPECT_STREQ("1.414213562373095", gc(xdtoal(_hypotl(-1, 1))));
EXPECT_STREQ("1.414213626012708", gc(xdtoal(_hypotl(1.0000001, .99999999))));
EXPECT_STREQ("1.414213626012708", gc(xdtoal(_hypotl(.99999999, 1.0000001))));
EXPECT_STREQ("1.414213562373095e+4931",
gc(xdtoal(_hypotl(1e4931L, 1e4931L))));
EXPECT_STREQ("NAN", gc(xdtoal(_hypotl(0, NAN))));
EXPECT_STREQ("NAN", gc(xdtoal(_hypotl(NAN, 0))));
EXPECT_STREQ("NAN", gc(xdtoal(_hypotl(NAN, NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoal(_hypotl(INFINITY, 0))));
EXPECT_STREQ("INFINITY", gc(xdtoal(_hypotl(0, INFINITY))));
EXPECT_STREQ("INFINITY", gc(xdtoal(_hypotl(INFINITY, NAN))));
EXPECT_STREQ("INFINITY", gc(xdtoal(_hypotl(NAN, INFINITY))));
EXPECT_STREQ("INFINITY", gc(xdtoal(_hypotl(INFINITY, INFINITY))));
Implement better hypot function
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}
Get more Python tests passing (#141)
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/*
Get LIBC_TESTLIB building on AARCH64
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_hypot (musl) l: 53𝑐 17𝑛𝑠 m: 85𝑐 27𝑛𝑠
_hypot l: 39𝑐 13𝑛𝑠 m: 66𝑐 21𝑛𝑠
_hypotf l: 25𝑐 8𝑛𝑠 m: 55𝑐 18𝑛𝑠
_hypotl l: 43𝑐 14𝑛𝑠 m: 74𝑐 24𝑛𝑠
Get more Python tests passing (#141)
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*/
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BENCH(_hypot, bench) {
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volatile double a = 2;
volatile double b = 3;
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EZBENCH2("hypotf", donothing, EXPROPRIATE(_hypotf(a, b)));
EZBENCH2("hypot", donothing, EXPROPRIATE(_hypot(a, b)));
EZBENCH2("hypotl", donothing, EXPROPRIATE(_hypotl(a, b)));
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}
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