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fixdfti_test.c
124 lines (106 loc) · 3.74 KB
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fixdfti_test.c
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// RUN: %clang_builtins %s %librt -o %t && %run %t
//===-- fixdfti_test.c - Test __fixdfti -----------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file tests __fixdfti for the compiler_rt library.
//
//===----------------------------------------------------------------------===//
#include "int_lib.h"
#include <stdio.h>
#ifdef CRT_HAS_128BIT
// Returns: convert a to a signed long long, rounding toward zero.
// Assumption: double is a IEEE 64 bit floating point type
// su_int is a 32 bit integral type
// value in double is representable in ti_int (no range checking performed)
// seee eeee eeee mmmm mmmm mmmm mmmm mmmm | mmmm mmmm mmmm mmmm mmmm mmmm mmmm mmmm
COMPILER_RT_ABI ti_int __fixdfti(double a);
int test__fixdfti(double a, ti_int expected)
{
ti_int x = __fixdfti(a);
if (x != expected)
{
twords xt;
xt.all = x;
twords expectedt;
expectedt.all = expected;
printf("error in __fixdfti(%A) = 0x%.16llX%.16llX, expected 0x%.16llX%.16llX\n",
a, xt.s.high, xt.s.low, expectedt.s.high, expectedt.s.low);
}
return x != expected;
}
char assumption_1[sizeof(ti_int) == 2*sizeof(di_int)] = {0};
char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};
char assumption_3[sizeof(double)*CHAR_BIT == 64] = {0};
#endif
int main()
{
#ifdef CRT_HAS_128BIT
if (test__fixdfti(0.0, 0))
return 1;
if (test__fixdfti(0.5, 0))
return 1;
if (test__fixdfti(0.99, 0))
return 1;
if (test__fixdfti(1.0, 1))
return 1;
if (test__fixdfti(1.5, 1))
return 1;
if (test__fixdfti(1.99, 1))
return 1;
if (test__fixdfti(2.0, 2))
return 1;
if (test__fixdfti(2.01, 2))
return 1;
if (test__fixdfti(-0.5, 0))
return 1;
if (test__fixdfti(-0.99, 0))
return 1;
if (test__fixdfti(-1.0, -1))
return 1;
if (test__fixdfti(-1.5, -1))
return 1;
if (test__fixdfti(-1.99, -1))
return 1;
if (test__fixdfti(-2.0, -2))
return 1;
if (test__fixdfti(-2.01, -2))
return 1;
if (test__fixdfti(0x1.FFFFFEp+62, 0x7FFFFF8000000000LL))
return 1;
if (test__fixdfti(0x1.FFFFFCp+62, 0x7FFFFF0000000000LL))
return 1;
if (test__fixdfti(-0x1.FFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
0x8000008000000000LL)))
return 1;
if (test__fixdfti(-0x1.FFFFFCp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
0x8000010000000000LL)))
return 1;
if (test__fixdfti(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00LL))
return 1;
if (test__fixdfti(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800LL))
return 1;
if (test__fixdfti(-0x1.FFFFFFFFFFFFFp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
0x8000000000000400LL)))
return 1;
if (test__fixdfti(-0x1.FFFFFFFFFFFFEp+62, make_ti(0xFFFFFFFFFFFFFFFFLL,
0x8000000000000800LL)))
return 1;
if (test__fixdfti(0x1.FFFFFFFFFFFFFp+126, make_ti(0x7FFFFFFFFFFFFC00LL, 0)))
return 1;
if (test__fixdfti(0x1.FFFFFFFFFFFFEp+126, make_ti(0x7FFFFFFFFFFFF800LL, 0)))
return 1;
if (test__fixdfti(-0x1.FFFFFFFFFFFFFp+126, make_ti(0x8000000000000400LL, 0)))
return 1;
if (test__fixdfti(-0x1.FFFFFFFFFFFFEp+126, make_ti(0x8000000000000800LL, 0)))
return 1;
#else
printf("skipped\n");
#endif
return 0;
}