1*9a24a17aSotto /* $OpenBSD: fpsetmask.c,v 1.4 2004/01/05 06:06:16 otto Exp $ */ 2c9d6e9aeSmiod 3c9d6e9aeSmiod /* 44451fc0fSmiod * Written by Miodrag Vallat. Public domain 5c9d6e9aeSmiod */ 6c9d6e9aeSmiod 7c9d6e9aeSmiod #include <sys/types.h> 8c9d6e9aeSmiod #include <ieeefp.h> 9c9d6e9aeSmiod 10c9d6e9aeSmiod fp_except 11c9d6e9aeSmiod fpsetmask(mask) 12c9d6e9aeSmiod fp_except mask; 13c9d6e9aeSmiod { 148524f5e4Smickey u_int64_t fpsr; 15*9a24a17aSotto fp_except old; 16c9d6e9aeSmiod 178524f5e4Smickey __asm__ __volatile__("fstd %%fr0,0(%1)" : "=m"(fpsr) : "r"(&fpsr)); 188524f5e4Smickey old = (fpsr >> 32) & 0x1f; 198524f5e4Smickey fpsr = (fpsr & 0xffffffe000000000LL) | ((u_int64_t)(mask & 0x1f) << 32); 208524f5e4Smickey __asm__ __volatile__("fldd 0(%0),%%fr0" : : "r"(&fpsr)); 21c9d6e9aeSmiod return (old); 22c9d6e9aeSmiod } 23