zig/lib/libc/mingw/misc/winbs_ushort.c
Andrew Kelley 49d1a4c562 move lib dirs to lib subdir
also start prefering NtDll API. so far:
 * NtQueryInformationFile
 * NtClose

adds a performance workaround for windows unicode conversion. but that
should probably be removed before merging
2019-07-15 17:54:50 -04:00

18 lines
569 B
C

unsigned short __cdecl _byteswap_ushort(unsigned short _Short);
unsigned short __cdecl _byteswap_ushort(unsigned short _Short)
{
#if defined(_AMD64_) || defined(__x86_64__) || defined(_X86_) || defined(__i386__)
unsigned short retval;
__asm__ __volatile__ ("rorw $8, %w[retval]" : [retval] "=rm" (retval) : "[retval]" (_Short));
return retval;
#else
unsigned char *b = (void*)&_Short;
unsigned char tmp;
tmp = b[0];
b[0] = b[1];
b[1] = tmp;
return _Short;
#endif /* defined(_AMD64_) || defined(__x86_64__) || defined(_X86_) || defined(__i386__) */
}