/* * Linux 386 fpu support * Mimic Plan9 floating point support */ static voidsetfcr(ulong fcr){	__asm__(	"xorb	$0x3f, %%al\n\t"			"pushw	%%ax\n\t"			"fwait\n\t"			"fldcw	(%%esp)\n\t"			"popw	%%ax\n\t"			: /* no output */			: "al" (fcr)	);} static ulonggetfcr(void){	ulong fcr = 0; 	__asm__(	"pushl	%%eax\n\t"			"fwait\n\t"			"fstcw	(%%esp)\n\t"			"popl	%%eax\n\t"			"xorb	$0x3f, %%al\n\t"			: "=a"  (fcr)			: "eax"	(fcr)	);	return fcr; } static ulonggetfsr(void){	ulong fsr = -1; 	__asm__(	"fwait\n\t"			"fstsw	(%%eax)\n\t"			"movl	(%%eax), %%eax\n\t"			"andl	$0xffff, %%eax\n\t"			: "=a"  (fsr)			: "eax" (&fsr)	);	return fsr;} static voidsetfsr(ulong fsr){	__asm__("fclex\n\t");} /* FCR */#define	FPINEX	(1<<5)#define	FPUNFL	((1<<4)|(1<<1))#define	FPOVFL	(1<<3)#define	FPZDIV	(1<<2)#define	FPINVAL	(1<<0)#define	FPRNR	(0<<10)#define	FPRZ	(3<<10)#define	FPRPINF	(2<<10)#define	FPRNINF	(1<<10)#define	FPRMASK	(3<<10)#define	FPPEXT	(3<<8)#define	FPPSGL	(0<<8)#define	FPPDBL	(2<<8)#define	FPPMASK	(3<<8)/* FSR */#define	FPAINEX	FPINEX#define	FPAOVFL	FPOVFL#define	FPAUNFL	FPUNFL#define	FPAZDIV	FPZDIV#define	FPAINVAL	FPINVAL