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Write kvtopte() and kvtophys() as inline assembler. GCC create quite bad 

code for them, and they are only 2-3 instructions each if written by hand.
This commit is contained in:
ragge 2000-05-27 21:17:06 +00:00
parent f460c85cb3
commit 8293b12111
1 changed files with 16 additions and 4 deletions
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20
sys/arch/vax/include/pte.h
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@ -1,4 +1,4 @@
/* $NetBSD: pte.h,v 1.13 1999/08/03 19:53:23 ragge Exp $ */
/* $NetBSD: pte.h,v 1.14 2000/05/27 21:17:06 ragge Exp $ */
/*
* Copyright (c) 1994 Ludd, University of Lule}, Sweden.
@ -80,11 +80,23 @@ extern pt_entry_t *Sysmap;
*/
#endif
#define kvtopte(va) (&Sysmap[PG_PFNUM(va)])
#define ptetokv(pt) \
((((pt_entry_t *)(pt) - Sysmap) << VAX_PGSHIFT) + 0x80000000)
#ifdef __GNUC__
#define kvtopte(va) ({ \
struct pte *r; \
asm("extzv $9,$21,%1,%0;moval *_Sysmap[%0],%0" : "=r"(r) : "g"(va)); \
r; \
})
#define kvtophys(va) ({ \
long r; \
asm("extzv $9,$21,%1,%0;ashl $9,*_Sysmap[%0],%0;insv %1,$0,$9,%0" \
: "&=r"(r) : "g"(va) : "cc"); \
r; \
})
#else /* __GNUC__ */
#define kvtophys(va) \
(((kvtopte(va))->pg_pfn << VAX_PGSHIFT) | ((int)(va) & VAX_PGOFSET))
#define kvtopte(va) (&Sysmap[PG_PFNUM(va)])
#endif /* __GNUC__ */
#define uvtopte(va, pcb) \
(((unsigned)va < 0x40000000) ? \
&((pcb->P0BR)[PG_PFNUM(va)]) : \