--- /dev/null
+/* 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.
+
+ * SPDX-License-Identifier: GPL-2.0+
+ */
+
+/* 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
Code Review / kvmfornfv.git / blobdiff