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Stop using cr0 to flag that the FPU has not been used.

This commit is contained in:
mycroft 1995-08-06 06:05:28 +00:00
parent ce7cc0c18a
commit a326c49adf
1 changed files with 11 additions and 11 deletions
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22
sys/arch/i386/isa/npx.c
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@ -1,4 +1,4 @@
/* $NetBSD: npx.c,v 1.44 1995/08/06 05:33:39 mycroft Exp $ */
/* $NetBSD: npx.c,v 1.45 1995/08/06 06:05:28 mycroft Exp $ */
#if 0
#define iprintf(x) printf x
@ -342,7 +342,7 @@ npxattach(parent, self, aux)
fninit();
if (npx586bug1(4195835, 3145727) != 0)
printf("WARNING: Pentium FDIV bug detected!\n");
lcr0(rcr0() | (CR0_EM|CR0_TS));
lcr0(rcr0() | (CR0_TS));
}
/*
@ -497,17 +497,17 @@ npxdna()
{
register struct pcb *pcb = &curproc->p_addr->u_pcb;
if ((pcb->pcb_cr0 & CR0_EM) != 0) {
if ((curproc->p_md.md_flags & MDP_USEDFPU) == 0 &&
npx_type != NPX_NONE) {
iprintf(("Init"));
npxinit();
return (1);
}
if (npx_type == NPX_NONE) {
iprintf(("Emul"));
return (0);
}
if ((curproc->p_md.md_flags & MDP_USEDFPU) == 0) {
iprintf(("Init"));
npxinit();
return (1);
}
#ifdef DIAGNOSTIC
if (cpl != 0 || npx_nointr != 0)
panic("npxdna: masked");
@ -546,7 +546,7 @@ void
npxdrop()
{
npxproc->p_addr->u_pcb.pcb_cr0 |= CR0_EM|CR0_TS;
npxproc->p_addr->u_pcb.pcb_cr0 |= CR0_TS;
npxproc = 0;
}
@ -590,7 +590,7 @@ npxinit()
if (cpl != 0 || npx_nointr != 0)
panic("npxinit: masked");
#endif
lcr0(curproc->p_addr->u_pcb.pcb_cr0 &= ~(CR0_EM|CR0_TS));
lcr0(curproc->p_addr->u_pcb.pcb_cr0 &= ~CR0_TS);
if (npxproc != 0 && npxproc != curproc)
npxsave1();
else {