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Use PCB_USEDFPU, and a small performance tweak.

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This commit is contained in:
mycroft 1995-05-03 00:17:16 +00:00
parent 66927585fc
commit f57d609a52
2 changed files with 5 additions and 5 deletions
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4
sys/arch/i386/i386/math_emu.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: math_emu.h,v 1.4 1994/10/27 04:15:30 cgd Exp $ */
/* $NetBSD: math_emu.h,v 1.5 1995/05/03 00:17:16 mycroft Exp $ */
/*
* linux/include/linux/math_emu.h
@ -69,7 +69,7 @@ struct i387_struct {
long st_space[20]; /* 8*10 bytes for each FP-reg = 80 bytes */
};
#define I387 (*(struct i387_struct *)&(curproc->p_addr->u_pcb.pcb_savefpu))
#define I387 (*(struct i387_struct *)&(curpcb->pcb_savefpu))
#define SWD (*(struct swd *) &I387.swd)
#define ROUNDING ((I387.cwd >> 10) & 3)
#define PRECISION ((I387.cwd >> 8) & 3)

6
sys/arch/i386/i386/math_emulate.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: math_emulate.c,v 1.12 1995/05/01 08:06:42 mycroft Exp $ */
/* $NetBSD: math_emulate.c,v 1.13 1995/05/03 00:17:19 mycroft Exp $ */
/*
* expediant "port" of linux 8087 emulator to 386BSD, with apologies -wfj
@ -79,8 +79,8 @@ math_emulate(struct trapframe *info)
panic("math emulator called from supervisor mode");
/* ever used fp? */
if ((curproc->p_addr->u_pcb.pcb_flags & FP_SOFTFP) == 0) {
curproc->p_addr->u_pcb.pcb_flags |= FP_SOFTFP;
if ((curpcb->pcb_flags & PCB_USEDFPU) == 0) {
curpcb->pcb_flags |= PCB_USEDFPU;
fninit();
}