86 lines · c
1// RUN: %clang_builtins %s %librt -o %t && %run %t2// REQUIRES: librt_has_fixunssfsi3 4#include "int_lib.h"5#include <stdio.h>6 7// Returns: convert a to a unsigned int, rounding toward zero.8// Negative values all become zero.9 10// Assumption: float is a IEEE 32 bit floating point type 11// su_int is a 32 bit integral type12// value in float is representable in su_int or is negative 13// (no range checking performed)14 15// seee eeee emmm mmmm mmmm mmmm mmmm mmmm16 17COMPILER_RT_ABI su_int __fixunssfsi(float a);18 19int test__fixunssfsi(float a, su_int expected)20{21 su_int x = __fixunssfsi(a);22 if (x != expected)23 printf("error in __fixunssfsi(%A) = %X, expected %X\n", a, x, expected);24 return x != expected;25}26 27char assumption_2[sizeof(su_int)*CHAR_BIT == 32] = {0};28char assumption_3[sizeof(float)*CHAR_BIT == 32] = {0};29 30int main()31{32 if (test__fixunssfsi(0.0F, 0))33 return 1;34 35 if (test__fixunssfsi(0.5F, 0))36 return 1;37 if (test__fixunssfsi(0.99F, 0))38 return 1;39 if (test__fixunssfsi(1.0F, 1))40 return 1;41 if (test__fixunssfsi(1.5F, 1))42 return 1;43 if (test__fixunssfsi(1.99F, 1))44 return 1;45 if (test__fixunssfsi(2.0F, 2))46 return 1;47 if (test__fixunssfsi(2.01F, 2))48 return 1;49 if (test__fixunssfsi(-0.5F, 0))50 return 1;51 if (test__fixunssfsi(-0.99F, 0))52 return 1;53#if !TARGET_LIBGCC54 if (test__fixunssfsi(-1.0F, 0)) // libgcc ignores "returns 0 for negative input" spec55 return 1;56 if (test__fixunssfsi(-1.5F, 0))57 return 1;58 if (test__fixunssfsi(-1.99F, 0))59 return 1;60 if (test__fixunssfsi(-2.0F, 0))61 return 1;62 if (test__fixunssfsi(-2.01F, 0))63 return 1;64#endif65 66 if (test__fixunssfsi(0x1.000000p+31F, 0x80000000))67 return 1;68 if (test__fixunssfsi(0x1.000000p+32F, 0xFFFFFFFF))69 return 1;70 if (test__fixunssfsi(0x1.FFFFFEp+31F, 0xFFFFFF00))71 return 1;72 if (test__fixunssfsi(0x1.FFFFFEp+30F, 0x7FFFFF80))73 return 1;74 if (test__fixunssfsi(0x1.FFFFFCp+30F, 0x7FFFFF00))75 return 1;76 77#if !TARGET_LIBGCC78 if (test__fixunssfsi(-0x1.FFFFFEp+30F, 0))79 return 1;80 if (test__fixunssfsi(-0x1.FFFFFCp+30F, 0))81 return 1;82#endif83 84 return 0;85}86