upstream u-boot with additional patches for our devices/boards:
https://lists.denx.de/pipermail/u-boot/2017-March/282789.html (AXP crashes) ;
Gbit ethernet patch for some LIME2 revisions ;
with SPI flash support
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
263 lines
9.0 KiB
263 lines
9.0 KiB
/* longlong.h -- definitions for mixed size 32/64 bit arithmetic.
|
|
Copyright (C) 1991, 1992, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2004,
|
|
2005 Free Software Foundation, Inc.
|
|
|
|
This definition file is free software; you can redistribute it
|
|
and/or modify it under the terms of the GNU General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2, or (at your option) any later version.
|
|
|
|
This definition file is distributed in the hope that it will be
|
|
useful, but WITHOUT ANY WARRANTY; without even the implied
|
|
warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
/* You have to define the following before including this file:
|
|
|
|
UWtype -- An unsigned type, default type for operations (typically a "word")
|
|
UHWtype -- An unsigned type, at least half the size of UWtype.
|
|
UDWtype -- An unsigned type, at least twice as large a UWtype
|
|
W_TYPE_SIZE -- size in bits of UWtype
|
|
|
|
UQItype -- Unsigned 8 bit type.
|
|
SItype, USItype -- Signed and unsigned 32 bit types.
|
|
DItype, UDItype -- Signed and unsigned 64 bit types.
|
|
|
|
On a 32 bit machine UWtype should typically be USItype;
|
|
on a 64 bit machine, UWtype should typically be UDItype. */
|
|
|
|
#define __BITS4 (W_TYPE_SIZE / 4)
|
|
#define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))
|
|
#define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))
|
|
#define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))
|
|
|
|
#ifndef W_TYPE_SIZE
|
|
#define W_TYPE_SIZE 32
|
|
#define UWtype USItype
|
|
#define UHWtype USItype
|
|
#define UDWtype UDItype
|
|
#endif
|
|
|
|
extern const UQItype __clz_tab[256];
|
|
|
|
/* Define auxiliary asm macros.
|
|
|
|
1) umul_ppmm(high_prod, low_prod, multiplier, multiplicand) multiplies two
|
|
UWtype integers MULTIPLIER and MULTIPLICAND, and generates a two UWtype
|
|
word product in HIGH_PROD and LOW_PROD.
|
|
|
|
2) __umulsidi3(a,b) multiplies two UWtype integers A and B, and returns a
|
|
UDWtype product. This is just a variant of umul_ppmm.
|
|
|
|
3) udiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
|
|
denominator) divides a UDWtype, composed by the UWtype integers
|
|
HIGH_NUMERATOR and LOW_NUMERATOR, by DENOMINATOR and places the quotient
|
|
in QUOTIENT and the remainder in REMAINDER. HIGH_NUMERATOR must be less
|
|
than DENOMINATOR for correct operation. If, in addition, the most
|
|
significant bit of DENOMINATOR must be 1, then the pre-processor symbol
|
|
UDIV_NEEDS_NORMALIZATION is defined to 1.
|
|
|
|
4) sdiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
|
|
denominator). Like udiv_qrnnd but the numbers are signed. The quotient
|
|
is rounded towards 0.
|
|
|
|
5) count_leading_zeros(count, x) counts the number of zero-bits from the
|
|
msb to the first nonzero bit in the UWtype X. This is the number of
|
|
steps X needs to be shifted left to set the msb. Undefined for X == 0,
|
|
unless the symbol COUNT_LEADING_ZEROS_0 is defined to some value.
|
|
|
|
6) count_trailing_zeros(count, x) like count_leading_zeros, but counts
|
|
from the least significant end.
|
|
|
|
7) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
|
|
high_addend_2, low_addend_2) adds two UWtype integers, composed by
|
|
HIGH_ADDEND_1 and LOW_ADDEND_1, and HIGH_ADDEND_2 and LOW_ADDEND_2
|
|
respectively. The result is placed in HIGH_SUM and LOW_SUM. Overflow
|
|
(i.e. carry out) is not stored anywhere, and is lost.
|
|
|
|
8) sub_ddmmss(high_difference, low_difference, high_minuend, low_minuend,
|
|
high_subtrahend, low_subtrahend) subtracts two two-word UWtype integers,
|
|
composed by HIGH_MINUEND_1 and LOW_MINUEND_1, and HIGH_SUBTRAHEND_2 and
|
|
LOW_SUBTRAHEND_2 respectively. The result is placed in HIGH_DIFFERENCE
|
|
and LOW_DIFFERENCE. Overflow (i.e. carry out) is not stored anywhere,
|
|
and is lost.
|
|
|
|
If any of these macros are left undefined for a particular CPU,
|
|
C macros are used. */
|
|
|
|
/* The CPUs come in alphabetical order below.
|
|
|
|
Please add support for more CPUs here, or improve the current support
|
|
for the CPUs below!
|
|
(E.g. WE32100, IBM360.) */
|
|
|
|
/* Snipped per CPU support */
|
|
|
|
/* If this machine has no inline assembler, use C macros. */
|
|
|
|
#if !defined (add_ssaaaa)
|
|
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
|
|
do { \
|
|
UWtype __x; \
|
|
__x = (al) + (bl); \
|
|
(sh) = (ah) + (bh) + (__x < (al)); \
|
|
(sl) = __x; \
|
|
} while (0)
|
|
#endif
|
|
|
|
#if !defined (sub_ddmmss)
|
|
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
|
|
do { \
|
|
UWtype __x; \
|
|
__x = (al) - (bl); \
|
|
(sh) = (ah) - (bh) - (__x > (al)); \
|
|
(sl) = __x; \
|
|
} while (0)
|
|
#endif
|
|
|
|
/* If we lack umul_ppmm but have smul_ppmm, define umul_ppmm in terms of
|
|
smul_ppmm. */
|
|
#if !defined (umul_ppmm) && defined (smul_ppmm)
|
|
#define umul_ppmm(w1, w0, u, v) \
|
|
do { \
|
|
UWtype __w1; \
|
|
UWtype __xm0 = (u), __xm1 = (v); \
|
|
smul_ppmm (__w1, w0, __xm0, __xm1); \
|
|
(w1) = __w1 + (-(__xm0 >> (W_TYPE_SIZE - 1)) & __xm1) \
|
|
+ (-(__xm1 >> (W_TYPE_SIZE - 1)) & __xm0); \
|
|
} while (0)
|
|
#endif
|
|
|
|
/* If we still don't have umul_ppmm, define it using plain C. */
|
|
#if !defined (umul_ppmm)
|
|
#define umul_ppmm(w1, w0, u, v) \
|
|
do { \
|
|
UWtype __x0, __x1, __x2, __x3; \
|
|
UHWtype __ul, __vl, __uh, __vh; \
|
|
\
|
|
__ul = __ll_lowpart (u); \
|
|
__uh = __ll_highpart (u); \
|
|
__vl = __ll_lowpart (v); \
|
|
__vh = __ll_highpart (v); \
|
|
\
|
|
__x0 = (UWtype) __ul * __vl; \
|
|
__x1 = (UWtype) __ul * __vh; \
|
|
__x2 = (UWtype) __uh * __vl; \
|
|
__x3 = (UWtype) __uh * __vh; \
|
|
\
|
|
__x1 += __ll_highpart (__x0);/* this can't give carry */ \
|
|
__x1 += __x2; /* but this indeed can */ \
|
|
if (__x1 < __x2) /* did we get it? */ \
|
|
__x3 += __ll_B; /* yes, add it in the proper pos. */ \
|
|
\
|
|
(w1) = __x3 + __ll_highpart (__x1); \
|
|
(w0) = __ll_lowpart (__x1) * __ll_B + __ll_lowpart (__x0); \
|
|
} while (0)
|
|
#endif
|
|
|
|
#if !defined (__umulsidi3)
|
|
#define __umulsidi3(u, v) \
|
|
({DWunion __w; \
|
|
umul_ppmm (__w.s.high, __w.s.low, u, v); \
|
|
__w.ll; })
|
|
#endif
|
|
|
|
/* Define this unconditionally, so it can be used for debugging. */
|
|
#define __udiv_qrnnd_c(q, r, n1, n0, d) \
|
|
do { \
|
|
UWtype __d1, __d0, __q1, __q0; \
|
|
UWtype __r1, __r0, __m; \
|
|
__d1 = __ll_highpart (d); \
|
|
__d0 = __ll_lowpart (d); \
|
|
\
|
|
__r1 = (n1) % __d1; \
|
|
__q1 = (n1) / __d1; \
|
|
__m = (UWtype) __q1 * __d0; \
|
|
__r1 = __r1 * __ll_B | __ll_highpart (n0); \
|
|
if (__r1 < __m) \
|
|
{ \
|
|
__q1--, __r1 += (d); \
|
|
if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\
|
|
if (__r1 < __m) \
|
|
__q1--, __r1 += (d); \
|
|
} \
|
|
__r1 -= __m; \
|
|
\
|
|
__r0 = __r1 % __d1; \
|
|
__q0 = __r1 / __d1; \
|
|
__m = (UWtype) __q0 * __d0; \
|
|
__r0 = __r0 * __ll_B | __ll_lowpart (n0); \
|
|
if (__r0 < __m) \
|
|
{ \
|
|
__q0--, __r0 += (d); \
|
|
if (__r0 >= (d)) \
|
|
if (__r0 < __m) \
|
|
__q0--, __r0 += (d); \
|
|
} \
|
|
__r0 -= __m; \
|
|
\
|
|
(q) = (UWtype) __q1 * __ll_B | __q0; \
|
|
(r) = __r0; \
|
|
} while (0)
|
|
|
|
/* If the processor has no udiv_qrnnd but sdiv_qrnnd, go through
|
|
__udiv_w_sdiv (defined in libgcc or elsewhere). */
|
|
#if !defined (udiv_qrnnd) && defined (sdiv_qrnnd)
|
|
#define udiv_qrnnd(q, r, nh, nl, d) \
|
|
do { \
|
|
USItype __r; \
|
|
(q) = __udiv_w_sdiv (&__r, nh, nl, d); \
|
|
(r) = __r; \
|
|
} while (0)
|
|
#endif
|
|
|
|
/* If udiv_qrnnd was not defined for this processor, use __udiv_qrnnd_c. */
|
|
#if !defined (udiv_qrnnd)
|
|
#define UDIV_NEEDS_NORMALIZATION 1
|
|
#define udiv_qrnnd __udiv_qrnnd_c
|
|
#endif
|
|
|
|
#if !defined (count_leading_zeros)
|
|
#define count_leading_zeros(count, x) \
|
|
do { \
|
|
UWtype __xr = (x); \
|
|
UWtype __a; \
|
|
\
|
|
if (W_TYPE_SIZE <= 32) \
|
|
{ \
|
|
__a = __xr < ((UWtype)1<<2*__BITS4) \
|
|
? (__xr < ((UWtype)1<<__BITS4) ? 0 : __BITS4) \
|
|
: (__xr < ((UWtype)1<<3*__BITS4) ? 2*__BITS4 : 3*__BITS4); \
|
|
} \
|
|
else \
|
|
{ \
|
|
for (__a = W_TYPE_SIZE - 8; __a > 0; __a -= 8) \
|
|
if (((__xr >> __a) & 0xff) != 0) \
|
|
break; \
|
|
} \
|
|
\
|
|
(count) = W_TYPE_SIZE - (__clz_tab[__xr >> __a] + __a); \
|
|
} while (0)
|
|
#define COUNT_LEADING_ZEROS_0 W_TYPE_SIZE
|
|
#endif
|
|
|
|
#if !defined (count_trailing_zeros)
|
|
/* Define count_trailing_zeros using count_leading_zeros. The latter might be
|
|
defined in asm, but if it is not, the C version above is good enough. */
|
|
#define count_trailing_zeros(count, x) \
|
|
do { \
|
|
UWtype __ctz_x = (x); \
|
|
UWtype __ctz_c; \
|
|
count_leading_zeros (__ctz_c, __ctz_x & -__ctz_x); \
|
|
(count) = W_TYPE_SIZE - 1 - __ctz_c; \
|
|
} while (0)
|
|
#endif
|
|
|
|
#ifndef UDIV_NEEDS_NORMALIZATION
|
|
#define UDIV_NEEDS_NORMALIZATION 0
|
|
#endif
|
|
|