1/* $NetBSD: fpsetsticky.S,v 1.6 2014/05/22 15:01:56 uebayasi Exp $ */ 2 3/* 4 * Written by Frank van der Linden at Wasabi Systems for NetBSD 5 * Public domain. 6 */ 7 8#include <machine/asm.h> 9 10/* 11 * XXX set both the x87 status word and the SSE mxcsr register. 12 * Applications should only set exception and round flags 13 * via the fp*() interface, otherwise the status words 14 * will get our of sync. 15 */ 16 17 18#ifdef WEAK_ALIAS 19WEAK_ALIAS(fpsetsticky, _fpsetsticky) 20ENTRY(_fpsetsticky) 21#else 22ENTRY(fpsetsticky) 23#endif 24 fnstenv -28(%rsp) 25 stmxcsr -32(%rsp) 26 27 andl $63,%edi 28 29 movl -24(%rsp),%eax 30 movl %eax,%edx 31 andb $0xc0,%dl 32 33 orl %edi,%edx 34 movl %edx,-24(%rsp) 35 36 movl -32(%rsp),%edx 37 orl %edx,%eax 38 andl $63,%eax 39 andb $0xc0,%dl 40 orl %edi,%edx 41 movl %edx,-32(%rsp) 42 43 ldmxcsr -32(%rsp) 44 fldenv -28(%rsp) 45 ret 46#ifdef WEAK_ALIAS 47END(_fpsetsticky) 48#else 49END(fpsetsticky) 50#endif 51