#include void mxcsr_default ( void ) { asm(" pushl $0x1F80 ; ldmxcsr (%esp) ; addl $4, %esp"); } void mxcsr_exns ( void ) { asm(" pushl $0x1F00 ; ldmxcsr (%esp) ; addl $4, %esp"); } /* PIII doesn't have DAZ, so this segfaults (!) on PIII. */a void mxcsr_daz ( void ) { asm(" pushl $0x1FC0 ; ldmxcsr (%esp) ; addl $4, %esp"); } void mxcsr_fz ( void ) { asm(" pushl $0x9F80 ; ldmxcsr (%esp) ; addl $4, %esp"); } int main ( void ) { printf("default\n"); mxcsr_default(); printf("\n"); printf("exns\n"); mxcsr_exns(); printf("\n"); printf("daz\n"); mxcsr_daz(); printf("\n"); printf("fz\n"); mxcsr_fz(); printf("\n"); return 0; }