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Make the MASK_TO_SHIFT expression less "tall." Hopefully helps

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work-around the gcc bug reported by Erik Osheim.
This commit is contained in:
dyoung 2003-12-07 04:22:57 +00:00
parent 69ed3fa879
commit 78b6786442
1 changed files with 22 additions and 32 deletions
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54
sys/dev/ic/atwreg.h
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@ -1,4 +1,4 @@
/* $NetBSD: atwreg.h,v 1.2 2003/10/13 16:35:49 dyoung Exp $ */
/* $NetBSD: atwreg.h,v 1.3 2003/12/07 04:22:57 dyoung Exp $ */
/*
* Copyright (c) 2003 The NetBSD Foundation, Inc. All rights reserved.
@ -61,37 +61,27 @@
/* for x a power of two and p a non-negative integer, is x a greater power than 2**p? */
#define GTEQ_POWER(x, p) (((u_long)(x) >> (p)) != 0)
#define MASK_TO_SHIFT(m) ((GTEQ_POWER(LOWEST_SET_BIT((m)), 31) ? 31 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 30) ? 30 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 29) ? 29 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 28) ? 28 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 27) ? 27 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 26) ? 26 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 25) ? 25 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 24) ? 24 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 23) ? 23 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 22) ? 22 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 21) ? 21 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 20) ? 20 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 19) ? 19 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 18) ? 18 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 17) ? 17 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 16) ? 16 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 15) ? 15 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 14) ? 14 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 13) ? 13 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 12) ? 12 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 11) ? 11 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 10) ? 10 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 9) ? 9 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 8) ? 8 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 7) ? 7 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 6) ? 6 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 5) ? 5 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 4) ? 4 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 3) ? 3 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 2) ? 2 : \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 1) ? 1 : 0))))))))))))))))))))))))))))))))
#define MASK_TO_SHIFT2(m) (GTEQ_POWER(LOWEST_SET_BIT((m)), 1) ? 1 : 0)
#define MASK_TO_SHIFT4(m) \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 2) \
? 2 + MASK_TO_SHIFT2((m) >> 2) \
: MASK_TO_SHIFT2((m)))
#define MASK_TO_SHIFT8(m) \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 4) \
? 4 + MASK_TO_SHIFT4((m) >> 4) \
: MASK_TO_SHIFT4((m)))
#define MASK_TO_SHIFT16(m) \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 8) \
? 8 + MASK_TO_SHIFT8((m) >> 8) \
: MASK_TO_SHIFT8((m)))
#define MASK_TO_SHIFT(m) \
(GTEQ_POWER(LOWEST_SET_BIT((m)), 16) \
? 16 + MASK_TO_SHIFT16((m) >> 16) \
: MASK_TO_SHIFT16((m)))
#define MASK_AND_RSHIFT(x, mask) (((x) & (mask)) >> MASK_TO_SHIFT(mask))
#define LSHIFT(x, mask) ((x) << MASK_TO_SHIFT(mask))