diff options
Diffstat (limited to 'config/cmake/ConversionTests.c')
| -rw-r--r-- | config/cmake/ConversionTests.c | 167 |
1 files changed, 89 insertions, 78 deletions
diff --git a/config/cmake/ConversionTests.c b/config/cmake/ConversionTests.c index 082dbd4..321d879 100644 --- a/config/cmake/ConversionTests.c +++ b/config/cmake/ConversionTests.c @@ -9,12 +9,23 @@ * If you do not have access to either file, you may request a copy from * * help@hdfgroup.org. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ ++ +#if defined(__has_attribute) +#if __has_attribute(no_sanitize) +#define HDF_NO_UBSAN __attribute__((no_sanitize("undefined"))) +#else +#define HDF_NO_UBSAN +#endif +#else +#define HDF_NO_UBSAN +#endif + #ifdef H5_LDOUBLE_TO_LONG_SPECIAL_TEST #include <string.h> #include <stdlib.h> -int main(void) +int HDF_NO_UBSAN main(void) { long double ld = 20041683600089727.779961L; long ll; @@ -24,44 +35,44 @@ int main(void) int ret = 1; if(sizeof(long double) == 16 && sizeof(long) == 8) { - /*make sure the long double type has 16 bytes in size and - * 11 bits of exponent. If it is, - *the bit sequence should be like below. It's not - *a decent way to check but this info isn't available. */ - memcpy(s, &ld, 16); - if(s[0]==0x43 && s[1]==0x51 && s[2]==0xcc && s[3]==0xf3 && - s[4]==0x85 && s[5]==0xeb && s[6]==0xc8 && s[7]==0xa0 && - s[8]==0xbf && s[9]==0xcc && s[10]==0x2a && s[11]==0x3c) { - - /* Assign the hexadecimal value of long double type. */ - s[0]=0x43; s[1]=0x51; s[2]=0xcc; s[3]=0xf3; - s[4]=0x85; s[5]=0xeb; s[6]=0xc8; s[7]=0xa0; - s[8]=0xbf; s[9]=0xcc; s[10]=0x2a; s[11]=0x3c; - s[12]=0x3d; s[13]=0x85; s[14]=0x56; s[15]=0x20; - - memcpy(&ld, s, 16); - - ll = (long)ld; - memcpy(s2, &ll, 8); - - /* The library's algorithm converts it to 0x 00 47 33 ce 17 af 22 82 - * and gets wrong value 20041683600089730 on the IBM Power6 Linux. - * But the IBM Power6 Linux converts it to 0x00 47 33 ce 17 af 22 7f - * and gets the correct value 20041683600089727. It uses some special - * algorithm. We're going to define the macro and skip the test until - * we can figure out how they do it. */ - if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce && - s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f) - ret = 0; - - ull = (unsigned long)ld; - memcpy(s2, &ull, 8); - - /* The unsigned long is the same as signed long. */ - if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce && - s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f) - ret = 0; - } + /*make sure the long double type has 16 bytes in size and + * 11 bits of exponent. If it is, + *the bit sequence should be like below. It's not + *a decent way to check but this info isn't available. */ + memcpy(s, &ld, 16); + if(s[0]==0x43 && s[1]==0x51 && s[2]==0xcc && s[3]==0xf3 && + s[4]==0x85 && s[5]==0xeb && s[6]==0xc8 && s[7]==0xa0 && + s[8]==0xbf && s[9]==0xcc && s[10]==0x2a && s[11]==0x3c) { + + /* Assign the hexadecimal value of long double type. */ + s[0]=0x43; s[1]=0x51; s[2]=0xcc; s[3]=0xf3; + s[4]=0x85; s[5]=0xeb; s[6]=0xc8; s[7]=0xa0; + s[8]=0xbf; s[9]=0xcc; s[10]=0x2a; s[11]=0x3c; + s[12]=0x3d; s[13]=0x85; s[14]=0x56; s[15]=0x20; + + memcpy(&ld, s, 16); + + ll = (long)ld; + memcpy(s2, &ll, 8); + + /* The library's algorithm converts it to 0x 00 47 33 ce 17 af 22 82 + * and gets wrong value 20041683600089730 on the IBM Power6 Linux. + * But the IBM Power6 Linux converts it to 0x00 47 33 ce 17 af 22 7f + * and gets the correct value 20041683600089727. It uses some special + * algorithm. We're going to define the macro and skip the test until + * we can figure out how they do it. */ + if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce && + s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f) + ret = 0; + + ull = (unsigned long)ld; + memcpy(s2, &ull, 8); + + /* The unsigned long is the same as signed long. */ + if(s2[0]==0x00 && s2[1]==0x47 && s2[2]==0x33 && s2[3]==0xce && + s2[4]==0x17 && s2[5]==0xaf && s2[6]==0x22 && s2[7]==0x7f) + ret = 0; + } } done: @@ -75,7 +86,7 @@ done: #include <string.h> #include <stdlib.h> -int main(void) +int HDF_NO_UBSAN main(void) { long double ld; long ll; @@ -86,46 +97,46 @@ int main(void) /*Determine if long double has 16 byte in size, 11 bit exponent, and *the bias is 0x3ff */ if(sizeof(long double) == 16) { - ld = 1.0L; - memcpy(s, &ld, 16); - if(s[0]==0x3f && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 && - s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00) - flag = 1; + ld = 1.0L; + memcpy(s, &ld, 16); + if(s[0]==0x3f && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 && + s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00) + flag = 1; } if(flag==1 && sizeof(long)==8) { - ll = 0x003fffffffffffffL; - ld = (long double)ll; - memcpy(s, &ld, 16); - /* The library converts the value to 0x434fffffffffffff8000000000000000. - * In decimal it is 18014398509481982.000000, one value short of the original. - * The IBM Power6 Linux converts it to 0x4350000000000000bff0000000000000. - * The value is correct in decimal. It uses some special - * algorithm. We're going to define the macro and skip the test until - * we can figure out how they do it. */ - if(s[0]==0x43 && s[1]==0x50 && s[2]==0x00 && s[3]==0x00 && - s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 && - s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 && - s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00) - ret = 0; + ll = 0x003fffffffffffffL; + ld = (long double)ll; + memcpy(s, &ld, 16); + /* The library converts the value to 0x434fffffffffffff8000000000000000. + * In decimal it is 18014398509481982.000000, one value short of the original. + * The IBM Power6 Linux converts it to 0x4350000000000000bff0000000000000. + * The value is correct in decimal. It uses some special + * algorithm. We're going to define the macro and skip the test until + * we can figure out how they do it. */ + if(s[0]==0x43 && s[1]==0x50 && s[2]==0x00 && s[3]==0x00 && + s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 && + s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 && + s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00) + ret = 0; } if(flag==1 && sizeof(unsigned long)==8) { - ull = 0xffffffffffffffffUL; - ld = (long double)ull; - memcpy(s, &ld, 16); - /* Use a different value from signed long to test. The problem is the same - * for both long and unsigned long. The value is 18446744073709551615. - * The library converts the value to 0x43effffffffffffffe000000000000000. - * In decimal it's 18446744073709548544.000000, very different from the original. - * The IBM Power6 Linux converts it to 0x43f0000000000000bff0000000000000. - * The value is correct in decimal. It uses some special - * algorithm. We're going to define the macro and skip the test until - * we can figure out how they do it. */ - if(s[0]==0x43 && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 && - s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 && - s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 && - s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00) - ret = 0; + ull = 0xffffffffffffffffUL; + ld = (long double)ull; + memcpy(s, &ld, 16); + /* Use a different value from signed long to test. The problem is the same + * for both long and unsigned long. The value is 18446744073709551615. + * The library converts the value to 0x43effffffffffffffe000000000000000. + * In decimal it's 18446744073709548544.000000, very different from the original. + * The IBM Power6 Linux converts it to 0x43f0000000000000bff0000000000000. + * The value is correct in decimal. It uses some special + * algorithm. We're going to define the macro and skip the test until + * we can figure out how they do it. */ + if(s[0]==0x43 && s[1]==0xf0 && s[2]==0x00 && s[3]==0x00 && + s[4]==0x00 && s[5]==0x00 && s[6]==0x00 && s[7]==0x00 && + s[8]==0xbf && s[9]==0xf0 && s[10]==0x00 && s[11]==0x00 && + s[12]==0x00 && s[13]==0x00 && s[14]==0x00 && s[15]==0x00) + ret = 0; } done: exit(ret); @@ -138,7 +149,7 @@ done: #include <string.h> #include <stdlib.h> -int main(void) +int HDF_NO_UBSAN main(void) { long double ld = 20041683600089727.779961L; long long ll; @@ -181,7 +192,7 @@ done: #include <string.h> #include <stdlib.h> -int main(void) +int HDF_NO_UBSAN main(void) { long double ld; long long ll; @@ -242,7 +253,7 @@ int FC_DUMMY_MAIN() { return 1;} #endif #endif -int +int HDF_NO_UBSAN main () { |