longlong.h

早期freebsd实现

/* longlong.h -- definitions for mixed size 32/64 bit arithmetic.
   Copyright (C) 1991, 1992 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#ifndef SI_TYPE_SIZE
#define SI_TYPE_SIZE 32
#endif

#define __BITS4 (SI_TYPE_SIZE / 4)
#define __ll_B (1L << (SI_TYPE_SIZE / 2))
#define __ll_lowpart(t) ((USItype) (t) % __ll_B)
#define __ll_highpart(t) ((USItype) (t) / __ll_B)

/* Define auxiliary asm macros.

   1) umul_ppmm(high_prod, low_prod, multipler, multiplicand)
   multiplies two USItype integers MULTIPLER and MULTIPLICAND,
   and generates a two-part USItype product in HIGH_PROD and
   LOW_PROD.

   2) __umulsidi3(a,b) multiplies two USItype integers A and B,
   and returns a UDItype product.  This is just a variant of umul_ppmm.

   3) udiv_qrnnd(quotient, remainder, high_numerator, low_numerator,
   denominator) divides a two-word unsigned integer, composed by the
   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 non-zero bit.  This is the number of steps X
   needs to be shifted left to set the msb.  Undefined for X == 0.

   6) add_ssaaaa(high_sum, low_sum, high_addend_1, low_addend_1,
   high_addend_2, low_addend_2) adds two two-word unsigned 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.

   7) sub_ddmmss(high_difference, low_difference, high_minuend,
   low_minuend, high_subtrahend, low_subtrahend) subtracts two
   two-word unsigned 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, i960, IBM360.)  */

#if defined (__GNUC__) && !defined (NO_ASM)

/* We sometimes need to clobber "cc" with gcc2, but that would not be
   understood by gcc1.  Use cpp to avoid major code duplication.  */
#if __GNUC__ < 2
#define __CLOBBER_CC
#define __AND_CLOBBER_CC
#else /* __GNUC__ >= 2 */
#define __CLOBBER_CC : "cc"
#define __AND_CLOBBER_CC , "cc"
#endif /* __GNUC__ < 2 */

#if defined (__a29k__) || defined (___AM29K__)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("add %1,%4,%5
	addc %0,%2,%3"							\
	   : "=r" ((USItype)(sh)),					\
	    "=&r" ((USItype)(sl))					\
	   : "%r" ((USItype)(ah)),					\
	     "rI" ((USItype)(bh)),					\
	     "%r" ((USItype)(al)),					\
	     "rI" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("sub %1,%4,%5
	subc %0,%2,%3"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "r" ((USItype)(ah)),					\
	     "rI" ((USItype)(bh)),					\
	     "r" ((USItype)(al)),					\
	     "rI" ((USItype)(bl)))
#define umul_ppmm(xh, xl, m0, m1) \
  do {									\
    USItype __m0 = (m0), __m1 = (m1);					\
    __asm__ ("multiplu %0,%1,%2"					\
	     : "=r" ((USItype)(xl))					\
	     : "r" (__m0),						\
	       "r" (__m1));						\
    __asm__ ("multmu %0,%1,%2"						\
	     : "=r" ((USItype)(xh))					\
	     : "r" (__m0),						\
	       "r" (__m1));						\
  } while (0)
#define udiv_qrnnd(q, r, n1, n0, d) \
  __asm__ ("dividu %0,%3,%4"						\
	   : "=r" ((USItype)(q)),					\
	     "=q" ((USItype)(r))					\
	   : "1" ((USItype)(n1)),					\
	     "r" ((USItype)(n0)),					\
	     "r" ((USItype)(d)))
#define count_leading_zeros(count, x) \
    __asm__ ("clz %0,%1"						\
	     : "=r" ((USItype)(count))					\
	     : "r" ((USItype)(x)))
#endif /* __a29k__ */

#if defined (__arm__)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("adds %1,%4,%5
	adc %0,%2,%3"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "%r" ((USItype)(ah)),					\
	     "rI" ((USItype)(bh)),					\
	     "%r" ((USItype)(al)),					\
	     "rI" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("subs %1,%4,%5
	sbc %0,%2,%3"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "r" ((USItype)(ah)),					\
	     "rI" ((USItype)(bh)),					\
	     "r" ((USItype)(al)),					\
	     "rI" ((USItype)(bl)))
#endif /* __arm__ */

#if defined (__gmicro__)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("add.w %5,%1
	addx %3,%0"							\
	   : "=g" ((USItype)(sh)),					\
	     "=&g" ((USItype)(sl))					\
	   : "%0" ((USItype)(ah)),					\
	     "g" ((USItype)(bh)),					\
	     "%1" ((USItype)(al)),					\
	     "g" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("sub.w %5,%1
	subx %3,%0"							\
	   : "=g" ((USItype)(sh)),					\
	     "=&g" ((USItype)(sl))					\
	   : "0" ((USItype)(ah)),					\
	     "g" ((USItype)(bh)),					\
	     "1" ((USItype)(al)),					\
	     "g" ((USItype)(bl)))
#define umul_ppmm(ph, pl, m0, m1) \
  __asm__ ("mulx %3,%0,%1"						\
	   : "=g" ((USItype)(ph)),					\
	     "=r" ((USItype)(pl))					\
	   : "%0" ((USItype)(m0)),					\
	     "g" ((USItype)(m1)))
#define udiv_qrnnd(q, r, nh, nl, d) \
  __asm__ ("divx %4,%0,%1"						\
	   : "=g" ((USItype)(q)),					\
	     "=r" ((USItype)(r))					\
	   : "1" ((USItype)(nh)),					\
	     "0" ((USItype)(nl)),					\
	     "g" ((USItype)(d)))
#define count_leading_zeros(count, x) \
  __asm__ ("bsch/1 %1,%0"						\
	   : "=g" (count)						\
	   : "g" ((USItype)(x)),					\
	     "0" ((USItype)0))
#endif

#if defined (__hppa)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("add %4,%5,%1
	addc %2,%3,%0"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "%rM" ((USItype)(ah)),					\
	     "rM" ((USItype)(bh)),					\
	     "%rM" ((USItype)(al)),					\
	     "rM" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("sub %4,%5,%1
	subb %2,%3,%0"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "rM" ((USItype)(ah)),					\
	     "rM" ((USItype)(bh)),					\
	     "rM" ((USItype)(al)),					\
	     "rM" ((USItype)(bl)))
#if defined (_PA_RISC1_1)
#define umul_ppmm(w1, w0, u, v) \
  do {									\
    union								\
      {									\
	UDItype __f;							\
	struct {USItype __w1, __w0;} __w1w0;				\
      } __t;								\
    __asm__ ("xmpyu %1,%2,%0"						\
	     : "=x" (__t.__f)						\
	     : "x" ((USItype)(u)),					\
	       "x" ((USItype)(v)));					\
    (w1) = __t.__w1w0.__w1;						\
    (w0) = __t.__w1w0.__w0;						\
     } while (0)
#define UMUL_TIME 8
#else
#define UMUL_TIME 30
#endif
#define UDIV_TIME 40
#endif

#if defined (__i386__) || defined (__i486__)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("addl %5,%1
	adcl %3,%0"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "%0" ((USItype)(ah)),					\
	     "g" ((USItype)(bh)),					\
	     "%1" ((USItype)(al)),					\
	     "g" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("subl %5,%1
	sbbl %3,%0"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "0" ((USItype)(ah)),					\
	     "g" ((USItype)(bh)),					\
	     "1" ((USItype)(al)),					\
	     "g" ((USItype)(bl)))
#define umul_ppmm(w1, w0, u, v) \
  __asm__ ("mull %3"							\
	   : "=a" ((USItype)(w0)),					\
	     "=d" ((USItype)(w1))					\
	   : "%0" ((USItype)(u)),					\
	     "rm" ((USItype)(v)))
#define udiv_qrnnd(q, r, n1, n0, d) \
  __asm__ ("divl %4"							\
	   : "=a" ((USItype)(q)),					\
	     "=d" ((USItype)(r))					\
	   : "0" ((USItype)(n0)),					\
	     "1" ((USItype)(n1)),					\
	     "rm" ((USItype)(d)))
#define count_leading_zeros(count, x) \
  do {									\
    USItype __cbtmp;							\
    __asm__ ("bsrl %1,%0"						\
	     : "=r" (__cbtmp) : "rm" ((USItype)(x)));			\
    (count) = __cbtmp ^ 31;						\
  } while (0)
#define UMUL_TIME 40
#define UDIV_TIME 40
#endif /* 80x86 */

#if defined (__i860__)
#if 0
/* Make sure these patterns really improve the code before
   switching them on.  */
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  do {									\
    union								\
      {									\
	DItype __ll;							\
	struct {USItype __l, __h;} __i;					\
      }  __a, __b, __s;							\
    __a.__i.__l = (al);							\
    __a.__i.__h = (ah);							\
    __b.__i.__l = (bl);							\
    __b.__i.__h = (bh);							\
    __asm__ ("fiadd.dd %1,%2,%0"					\
	     : "=f" (__s.__ll)						\
	     : "%f" (__a.__ll), "f" (__b.__ll));			\
    (sh) = __s.__i.__h;							\
    (sl) = __s.__i.__l;							\
    } while (0)
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  do {									\
    union								\
      {									\
	DItype __ll;							\
	struct {USItype __l, __h;} __i;					\
      }  __a, __b, __s;							\
    __a.__i.__l = (al);							\
    __a.__i.__h = (ah);							\
    __b.__i.__l = (bl);							\
    __b.__i.__h = (bh);							\
    __asm__ ("fisub.dd %1,%2,%0"					\
	     : "=f" (__s.__ll)						\
	     : "%f" (__a.__ll), "f" (__b.__ll));			\
    (sh) = __s.__i.__h;							\
    (sl) = __s.__i.__l;							\
    } while (0)
#endif
#endif /* __i860__ */

#if defined (___IBMR2__) /* IBM RS6000 */
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("a%I5 %1,%4,%5
	ae %0,%2,%3"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "%r" ((USItype)(ah)),					\
	     "r" ((USItype)(bh)),					\
	     "%r" ((USItype)(al)),					\
	     "rI" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("sf%I4 %1,%5,%4
	sfe %0,%3,%2"							\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "r" ((USItype)(ah)),					\
	     "r" ((USItype)(bh)),					\
	     "rI" ((USItype)(al)),					\
	     "r" ((USItype)(bl)))
#define umul_ppmm(xh, xl, m0, m1) \
  do {									\
    USItype __m0 = (m0), __m1 = (m1);					\
    __asm__ ("mul %0,%2,%3"						\
	     : "=r" ((USItype)(xh)),					\
	       "=q" ((USItype)(xl))					\
	     : "r" (__m0),						\
	       "r" (__m1));						\
    (xh) += ((((SItype) __m0 >> 31) & __m1)				\
	     + (((SItype) __m1 >> 31) & __m0));				\
  } while (0)
#define smul_ppmm(xh, xl, m0, m1) \
  __asm__ ("mul %0,%2,%3"						\
	   : "=r" ((USItype)(xh)),					\
	     "=q" ((USItype)(xl))					\
	   : "r" ((USItype)(m0)),					\
	     "r" ((USItype)(m1)))
#define UMUL_TIME 8
#define sdiv_qrnnd(q, r, nh, nl, d) \
  __asm__ ("div %0,%2,%4"						\
	   : "=r" ((USItype)(q)), "=q" ((USItype)(r))			\
	   : "r" ((USItype)(nh)), "1" ((USItype)(nl)), "r" ((USItype)(d)))
#define UDIV_TIME 40
#define UDIV_NEEDS_NORMALIZATION 1
#define count_leading_zeros(count, x) \
  __asm__ ("cntlz %0,%1"						\
	   : "=r" ((USItype)(count))					\
	   : "r" ((USItype)(x)))
#endif /* ___IBMR2__ */

#if defined (__mc68000__)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("add%.l %5,%1
	addx%.l %3,%0"							\
	   : "=d" ((USItype)(sh)),					\
	     "=&d" ((USItype)(sl))					\
	   : "%0" ((USItype)(ah)),					\
	     "d" ((USItype)(bh)),					\
	     "%1" ((USItype)(al)),					\
	     "g" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("sub%.l %5,%1
	subx%.l %3,%0"							\
	   : "=d" ((USItype)(sh)),					\
	     "=&d" ((USItype)(sl))					\
	   : "0" ((USItype)(ah)),					\
	     "d" ((USItype)(bh)),					\
	     "1" ((USItype)(al)),					\
	     "g" ((USItype)(bl)))
#if defined (__mc68020__) || defined (__NeXT__) || defined(mc68020)
#define umul_ppmm(w1, w0, u, v) \
  __asm__ ("mulu%.l %3,%1:%0"						\
	   : "=d" ((USItype)(w0)),					\
	     "=d" ((USItype)(w1))					\
	   : "%0" ((USItype)(u)),					\
	     "dmi" ((USItype)(v)))
#define UMUL_TIME 45
#define udiv_qrnnd(q, r, n1, n0, d) \
  __asm__ ("divu%.l %4,%1:%0"						\
	   : "=d" ((USItype)(q)),					\
	     "=d" ((USItype)(r))					\
	   : "0" ((USItype)(n0)),					\
	     "1" ((USItype)(n1)),					\
	     "dmi" ((USItype)(d)))
#define UDIV_TIME 90
#define sdiv_qrnnd(q, r, n1, n0, d) \
  __asm__ ("divs%.l %4,%1:%0"						\
	   : "=d" ((USItype)(q)),					\
	     "=d" ((USItype)(r))					\
	   : "0" ((USItype)(n0)),					\
	     "1" ((USItype)(n1)),					\
	     "dmi" ((USItype)(d)))
#define count_leading_zeros(count, x) \
  __asm__ ("bfffo %1{%b2:%b2},%0"					\
	   : "=d" ((USItype)(count))					\
	   : "od" ((USItype)(x)), "n" (0))
#else /* not mc68020 */
/* %/ inserts REGISTER_PREFIX.  */
#define umul_ppmm(xh, xl, a, b) \
  __asm__ ("| Inlined umul_ppmm
	movel	%2,%/d0
	movel	%3,%/d1
	movel	%/d0,%/d2
	swap	%/d0
	movel	%/d1,%/d3
	swap	%/d1
	movew	%/d2,%/d4
	mulu	%/d3,%/d4
	mulu	%/d1,%/d2
	mulu	%/d0,%/d3
	mulu	%/d0,%/d1
	movel	%/d4,%/d0
	eorw	%/d0,%/d0
	swap	%/d0
	addl	%/d0,%/d2
	addl	%/d3,%/d2
	jcc	1f
	addl	#65536,%/d1
1:	swap	%/d2
	moveq	#0,%/d0
	movew	%/d2,%/d0
	movew	%/d4,%/d2
	movel	%/d2,%1
	addl	%/d1,%/d0
	movel	%/d0,%0"						\
	   : "=g" ((USItype)(xh)),					\
	     "=g" ((USItype)(xl))					\
	   : "g" ((USItype)(a)),					\
	     "g" ((USItype)(b))						\
	   : "d0", "d1", "d2", "d3", "d4")
#define UMUL_TIME 100
#define UDIV_TIME 400
#endif /* not mc68020 */
#endif /* mc68000 */

#if defined (__m88000__)
#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
  __asm__ ("addu.co %1,%r4,%r5
	addu.ci %0,%r2,%r3"						\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "%rJ" ((USItype)(ah)),					\
	     "rJ" ((USItype)(bh)),					\
	     "%rJ" ((USItype)(al)),					\
	     "rJ" ((USItype)(bl)))
#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
  __asm__ ("subu.co %1,%r4,%r5
	subu.ci %0,%r2,%r3"						\
	   : "=r" ((USItype)(sh)),					\
	     "=&r" ((USItype)(sl))					\
	   : "rJ" ((USItype)(ah)),					\
	     "rJ" ((USItype)(bh)),					\
	     "rJ" ((USItype)(al)),					\
	     "rJ" ((USItype)(bl)))
#define UMUL_TIME 17
#define UDIV_TIME 150
#define count_leading_zeros(count, x) \
  do {									\
    USItype __cbtmp;							\
    __asm__ ("ff1 %0,%1"						\
	     : "=r" (__cbtmp)						\
	     : "r" ((USItype)(x)));					\
    (count) = __cbtmp ^ 31;						\
  } while (0)
#if defined (__mc88110__)
#define umul_ppmm(w1, w0, u, v) \
  __asm__ ("mulu.d	r10,%2,%3
	or	%0,r10,0
	or	%1,r11,0"						\
	   : "=r" (w1),							\
	     "=r" (w0)							\
	   : "r" ((USItype)(u)),					\
	     "r" ((USItype)(v))						\
	   : "r10", "r11")
#define udiv_qrnnd(q, r, n1, n0, d) \
  __asm__ ("or	r10,%2,0
	or	r11,%3,0
	divu.d	r10,r10,%4
	mulu	%1,%4,r11
	subu	%1,%3,%1
	or	%0,r11,0"						\
	   : "=r" (q),							\
	     "=&r" (r)							\
	   : "r" ((USItype)(n1)),					\
	     "r" ((USItype)(n0)),					\
	     "r" ((USItype)(d))						\
	   : "r10", "r11")