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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/arch/sh/math-emu/sfp-util.h
26424 views
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/* SPDX-License-Identifier: GPL-2.0 */

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/*

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 * These are copied from glibc/stdlib/longlong.h

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 */

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#define add_ssaaaa(sh, sl, ah, al, bh, bl) \

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  do {                                                                  \

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    UWtype __x;                                                         \

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    __x = (al) + (bl);                                                  \

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    (sh) = (ah) + (bh) + (__x < (al));                                  \

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    (sl) = __x;                                                         \

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  } while (0)

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#define sub_ddmmss(sh, sl, ah, al, bh, bl) \

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  do {                                                                  \

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    UWtype __x;                                                         \

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    __x = (al) - (bl);                                                  \

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    (sh) = (ah) - (bh) - (__x > (al));                                  \

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    (sl) = __x;                                                         \

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  } while (0)

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#define umul_ppmm(w1, w0, u, v) \

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  __asm__ ("dmulu.l %2,%3\n\tsts    macl,%1\n\tsts  mach,%0"	\

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	: "=r" ((u32)(w1)), "=r" ((u32)(w0))	\

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	:  "r" ((u32)(u)),   "r" ((u32)(v))	\

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	: "macl", "mach")

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#define __ll_B ((UWtype) 1 << (W_TYPE_SIZE / 2))

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#define __ll_lowpart(t) ((UWtype) (t) & (__ll_B - 1))

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#define __ll_highpart(t) ((UWtype) (t) >> (W_TYPE_SIZE / 2))

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#define udiv_qrnnd(q, r, n1, n0, d) \

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  do {									\

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    UWtype __d1, __d0, __q1, __q0;					\

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    UWtype __r1, __r0, __m;						\

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    __d1 = __ll_highpart (d);						\

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    __d0 = __ll_lowpart (d);						\

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									\

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    __r1 = (n1) % __d1;							\

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    __q1 = (n1) / __d1;							\

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    __m = (UWtype) __q1 * __d0;						\

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    __r1 = __r1 * __ll_B | __ll_highpart (n0);				\

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    if (__r1 < __m)							\

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      {									\

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	__q1--, __r1 += (d);						\

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	if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */\

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	  if (__r1 < __m)						\

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	    __q1--, __r1 += (d);					\

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      }									\

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    __r1 -= __m;							\

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									\

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    __r0 = __r1 % __d1;							\

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    __q0 = __r1 / __d1;							\

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    __m = (UWtype) __q0 * __d0;						\

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    __r0 = __r0 * __ll_B | __ll_lowpart (n0);				\

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    if (__r0 < __m)							\

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      {									\

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	__q0--, __r0 += (d);						\

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	if (__r0 >= (d))						\

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	  if (__r0 < __m)						\

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	    __q0--, __r0 += (d);					\

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      }									\

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    __r0 -= __m;							\

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									\

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    (q) = (UWtype) __q1 * __ll_B | __q0;				\

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    (r) = __r0;								\

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  } while (0)

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#define abort()	return 0

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