1*e415d488SLionel Sambuc /* $NetBSD: fpsetmask.c,v 1.6 2012/03/23 09:34:09 skrll Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras /* $OpenBSD: fpsetmask.c,v 1.4 2004/01/05 06:06:16 otto Exp $ */ 42fe8fb19SBen Gras 52fe8fb19SBen Gras /* 62fe8fb19SBen Gras * Written by Miodrag Vallat. Public domain 72fe8fb19SBen Gras */ 82fe8fb19SBen Gras 92fe8fb19SBen Gras #include <sys/cdefs.h> 102fe8fb19SBen Gras #if defined(LIBC_SCCS) && !defined(lint) 11*e415d488SLionel Sambuc __RCSID("$NetBSD: fpsetmask.c,v 1.6 2012/03/23 09:34:09 skrll Exp $"); 122fe8fb19SBen Gras #endif /* LIBC_SCCS and not lint */ 132fe8fb19SBen Gras 142fe8fb19SBen Gras #include <sys/types.h> 152fe8fb19SBen Gras #include <ieeefp.h> 162fe8fb19SBen Gras 172fe8fb19SBen Gras fp_except fpsetmask(fp_except mask)182fe8fb19SBen Grasfpsetmask(fp_except mask) 192fe8fb19SBen Gras { 202fe8fb19SBen Gras uint64_t fpsr; 212fe8fb19SBen Gras fp_except old; 222fe8fb19SBen Gras 232fe8fb19SBen Gras __asm volatile("fstd %%fr0,0(%1)" : "=m"(fpsr) : "r"(&fpsr) : "memory"); 24*e415d488SLionel Sambuc old = (fp_except)(fpsr >> 32) & 0x1f; 252fe8fb19SBen Gras fpsr = (fpsr & 0xffffffe000000000LL) | ((uint64_t)(mask & 0x1f) << 32); 262fe8fb19SBen Gras __asm volatile("fldd 0(%0),%%fr0" : : "r"(&fpsr) : "memory"); 272fe8fb19SBen Gras return (old); 282fe8fb19SBen Gras } 29