87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
// RUN: %clang_builtins %s %librt -o %t && %run %t
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// REQUIRES: librt_has_floatundisf
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#include "int_lib.h"
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#include <float.h>
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#include <stdio.h>
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// Returns: convert a to a float, rounding toward even.
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// Assumption: float is a IEEE 32 bit floating point type
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// du_int is a 64 bit integral type
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// seee eeee emmm mmmm mmmm mmmm mmmm mmmm
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COMPILER_RT_ABI float __floatundisf(du_int a);
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int test__floatundisf(du_int a, float expected)
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{
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float x = __floatundisf(a);
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if (x != expected)
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printf("error in __floatundisf(%llX) = %a, expected %a\n",
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a, x, expected);
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return x != expected;
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}
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char assumption_1[sizeof(du_int) == 2*sizeof(si_int)] = {0};
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char assumption_2[sizeof(du_int)*CHAR_BIT == 64] = {0};
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char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};
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int main()
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{
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if (test__floatundisf(0, 0.0F))
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return 1;
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if (test__floatundisf(1, 1.0F))
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return 1;
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if (test__floatundisf(2, 2.0F))
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return 1;
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if (test__floatundisf(0x7FFFFF8000000000ULL, 0x1.FFFFFEp+62F))
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return 1;
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if (test__floatundisf(0x7FFFFF0000000000ULL, 0x1.FFFFFCp+62F))
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return 1;
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if (test__floatundisf(0x8000008000000000ULL, 0x1p+63F))
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return 1;
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if (test__floatundisf(0x8000010000000000LL, 0x1.000002p+63F))
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return 1;
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if (test__floatundisf(0x8000000000000000LL, 0x1p+63F))
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return 1;
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if (test__floatundisf(0x8000000000000001LL, 0x1p+63F))
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return 1;
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if (test__floatundisf(0xFFFFFFFFFFFFFFFELL, 0x1p+64F))
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return 1;
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if (test__floatundisf(0xFFFFFFFFFFFFFFFFLL, 0x1p+64F))
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return 1;
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if (test__floatundisf(0x0007FB72E8000000LL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72EA000000LL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72EB000000LL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72EBFFFFFFLL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72EC000000LL, 0x1.FEDCBCp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72E8000001LL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72E6000000LL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72E7000000LL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72E7FFFFFFLL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72E4000001LL, 0x1.FEDCBAp+50F))
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return 1;
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if (test__floatundisf(0x0007FB72E4000000LL, 0x1.FEDCB8p+50F))
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return 1;
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return 0;
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}
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