From 121dfd8f1b9e0ccbf5dfa7348ec764ccf1642ca7 Mon Sep 17 00:00:00 2001
From: mycroft <mycroft@NetBSD.org>
Date: Sat, 10 Aug 1996 15:42:33 +0000
Subject: [PATCH] Change PCI_MAPREG_{MEM,IO}_SIZE() to use the standard `x &
 -x' trick to select the lowest bit set.  This isn't any more or less valid
 according to the PCI spec, but it deals with lame devices that don't
 implement all of the top bits.

---
 sys/dev/pci/pcireg.h | 8 +++-----
 1 file changed, 3 insertions(+), 5 deletions(-)

diff --git a/sys/dev/pci/pcireg.h b/sys/dev/pci/pcireg.h
index 3f9d8fd0cfc5..0ff81cd8c1cc 100644
--- a/sys/dev/pci/pcireg.h
+++ b/sys/dev/pci/pcireg.h
@@ -1,4 +1,4 @@
-/*	$NetBSD: pcireg.h,v 1.10 1996/08/06 02:11:25 cgd Exp $	*/
+/*	$NetBSD: pcireg.h,v 1.11 1996/08/10 15:42:33 mycroft Exp $	*/
 
 /*
  * Copyright (c) 1995, 1996 Christopher G. Demetriou.  All rights reserved.
@@ -222,16 +222,14 @@ typedef u_int8_t pci_revision_t;
 #define	PCI_MAPREG_MEM_ADDR(mr)						\
 	    ((mr) & PCI_MAPREG_MEM_ADDR_MASK)
 #define	PCI_MAPREG_MEM_SIZE(mr)						\
-	    ((~PCI_MAPREG_MEM_ADDR(mr) & PCI_MAPREG_MEM_SIZE_MASK) + 1)
+	    (PCI_MAPREG_MEM_ADDR(mr) & -PCI_MAPREG_MEM_ADDR(mr))
 #define	PCI_MAPREG_MEM_ADDR_MASK		0xfffffff0
-#define	PCI_MAPREG_MEM_SIZE_MASK		0xffffffff
 
 #define	PCI_MAPREG_IO_ADDR(mr)						\
 	    ((mr) & PCI_MAPREG_IO_ADDR_MASK)
 #define	PCI_MAPREG_IO_SIZE(mr)						\
-	    ((~PCI_MAPREG_IO_ADDR(mr) & PCI_MAPREG_IO_SIZE_MASK) + 1)
+	    (PCI_MAPREG_IO_ADDR(mr) & -PCI_MAPREG_IO_ADDR(mr))
 #define	PCI_MAPREG_IO_ADDR_MASK			0xfffffffe
-#define	PCI_MAPREG_IO_SIZE_MASK			0xffffffff
 
 /*
  * Interrupt Configuration Register; contains interrupt pin and line.