cosmopolitan/test/libc/tinymath/trunc_test.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
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│ 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.      │
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│ 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"
#include "libc/mem/gc.internal.h"
#include "libc/testlib/ezbench.h"
#include "libc/testlib/testlib.h"
#include "libc/x/x.h"

double _trunc(double) asm("trunc");
float _truncf(float) asm("truncf");
long double _truncl(long double) asm("truncl");

TEST(trunc, test) {
  EXPECT_STREQ("3", gc(xdtoa(_trunc(3))));
  EXPECT_STREQ("3", gc(xdtoa(_trunc(3.14))));
  EXPECT_STREQ("-3", gc(xdtoa(_trunc(-3.14))));
  EXPECT_STREQ("-0", gc(xdtoa(_trunc(-0.))));
  EXPECT_STREQ("NAN", gc(xdtoa(_trunc(NAN))));
  EXPECT_STREQ("-NAN", gc(xdtoa(_trunc(-NAN))));
  EXPECT_STREQ("INFINITY", gc(xdtoa(_trunc(INFINITY))));
  EXPECT_STREQ("-INFINITY", gc(xdtoa(_trunc(-INFINITY))));
}

TEST(truncf, test) {
  EXPECT_STREQ("3", gc(xdtoaf(_truncf(3))));
  EXPECT_STREQ("3", gc(xdtoaf(_truncf(3.14))));
  EXPECT_STREQ("-3", gc(xdtoaf(_truncf(-3.14))));
  EXPECT_STREQ("-0", gc(xdtoaf(_truncf(-0.))));
  EXPECT_STREQ("NAN", gc(xdtoaf(_truncf(NAN))));
  EXPECT_STREQ("-NAN", gc(xdtoaf(_truncf(-NAN))));
  EXPECT_STREQ("INFINITY", gc(xdtoaf(_truncf(INFINITY))));
  EXPECT_STREQ("-INFINITY", gc(xdtoaf(_truncf(-INFINITY))));
}

TEST(truncl, test) {
  EXPECT_STREQ("3", gc(xdtoal(_truncl(3))));
  EXPECT_STREQ("3", gc(xdtoal(_truncl(3.14))));
  EXPECT_STREQ("-3", gc(xdtoal(_truncl(-3.14))));
  EXPECT_STREQ("-0", gc(xdtoal(_truncl(-0.))));
  EXPECT_STREQ("NAN", gc(xdtoal(_truncl(NAN))));
  EXPECT_STREQ("-NAN", gc(xdtoal(_truncl(-NAN))));
  EXPECT_STREQ("INFINITY", gc(xdtoal(_truncl(INFINITY))));
  EXPECT_STREQ("-INFINITY", gc(xdtoal(_truncl(-INFINITY))));
}

BENCH(truncl, bench) {
  EZBENCH2("trunc", donothing, _trunc(.7));    // ~1ns
  EZBENCH2("truncf", donothing, _truncf(.7));  // ~1ns
  EZBENCH2("truncl", donothing, _truncl(.7));  // ~7ns
}