sparc/math-emu/sfp-util_64.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 /*
0003  * arch/sparc64/math-emu/sfp-util.h
0004  *
0005  * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz)
0006  * Copyright (C) 1999 David S. Miller (davem@redhat.com)
0007  *
0008  */
0009
0010 #include <linux/kernel.h>
0011 #include <linux/sched.h>
0012 #include <linux/types.h>
0013 #include <asm/byteorder.h>
0014
0015 #define add_ssaaaa(sh, sl, ah, al, bh, bl)  \
0016   __asm__ ("addcc %4,%5,%1\n\t"         \
0017        "add %2,%3,%0\n\t"           \
0018        "bcs,a,pn %%xcc, 1f\n\t"     \
0019        "add %0, 1, %0\n"            \
0020        "1:"                 \
0021        : "=r" (sh),             \
0022          "=&r" (sl)             \
0023        : "r" ((UDItype)(ah)),       \
0024          "r" ((UDItype)(bh)),       \
0025          "r" ((UDItype)(al)),       \
0026          "r" ((UDItype)(bl))        \
0027        : "cc")
0028
0029 #define sub_ddmmss(sh, sl, ah, al, bh, bl)  \
0030   __asm__ ("subcc %4,%5,%1\n\t"         \
0031        "sub %2,%3,%0\n\t"           \
0032        "bcs,a,pn %%xcc, 1f\n\t"     \
0033        "sub %0, 1, %0\n"            \
0034        "1:"                 \
0035        : "=r" (sh),             \
0036          "=&r" (sl)             \
0037        : "r" ((UDItype)(ah)),       \
0038          "r" ((UDItype)(bh)),       \
0039          "r" ((UDItype)(al)),       \
0040          "r" ((UDItype)(bl))        \
0041        : "cc")
0042
0043 #define umul_ppmm(wh, wl, u, v)             \
0044   do {                          \
0045       UDItype tmp1, tmp2, tmp3, tmp4;       \
0046       __asm__ __volatile__ (            \
0047            "srl %7,0,%3\n\t"            \
0048            "mulx %3,%6,%1\n\t"          \
0049            "srlx %6,32,%2\n\t"          \
0050            "mulx %2,%3,%4\n\t"          \
0051            "sllx %4,32,%5\n\t"          \
0052            "srl %6,0,%3\n\t"            \
0053            "sub %1,%5,%5\n\t"           \
0054            "srlx %5,32,%5\n\t"          \
0055            "addcc %4,%5,%4\n\t"         \
0056            "srlx %7,32,%5\n\t"          \
0057            "mulx %3,%5,%3\n\t"          \
0058            "mulx %2,%5,%5\n\t"          \
0059            "sethi %%hi(0x80000000),%2\n\t"  \
0060            "addcc %4,%3,%4\n\t"         \
0061            "srlx %4,32,%4\n\t"          \
0062            "add %2,%2,%2\n\t"           \
0063            "movcc %%xcc,%%g0,%2\n\t"        \
0064            "addcc %5,%4,%5\n\t"         \
0065            "sllx %3,32,%3\n\t"          \
0066            "add %1,%3,%1\n\t"           \
0067            "add %5,%2,%0"           \
0068        : "=r" (wh),                 \
0069          "=&r" (wl),                \
0070          "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \
0071        : "r" ((UDItype)(u)),            \
0072          "r" ((UDItype)(v))             \
0073        : "cc");                 \
0074   } while (0)
0075
0076 #define udiv_qrnnd(q, r, n1, n0, d)             \
0077   do {                                                  \
0078     UWtype __d1, __d0, __q1, __q0, __r1, __r0, __m;     \
0079     __d1 = (d >> 32);                                   \
0080     __d0 = (USItype)d;                                  \
0081                                                         \
0082     __r1 = (n1) % __d1;                                 \
0083     __q1 = (n1) / __d1;                                 \
0084     __m = (UWtype) __q1 * __d0;                         \
0085     __r1 = (__r1 << 32) | (n0 >> 32);                   \
0086     if (__r1 < __m)                                     \
0087       {                                                 \
0088         __q1--, __r1 += (d);                            \
0089         if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */ \
0090           if (__r1 < __m)                               \
0091             __q1--, __r1 += (d);                        \
0092       }                                                 \
0093     __r1 -= __m;                                        \
0094                                                         \
0095     __r0 = __r1 % __d1;                                 \
0096     __q0 = __r1 / __d1;                                 \
0097     __m = (UWtype) __q0 * __d0;                         \
0098     __r0 = (__r0 << 32) | ((USItype)n0);                \
0099     if (__r0 < __m)                                     \
0100       {                                                 \
0101         __q0--, __r0 += (d);                            \
0102         if (__r0 >= (d))                                \
0103           if (__r0 < __m)                               \
0104             __q0--, __r0 += (d);                        \
0105       }                                                 \
0106     __r0 -= __m;                                        \
0107                                                         \
0108     (q) = (UWtype) (__q1 << 32)  | __q0;                \
0109     (r) = __r0;                                         \
0110   } while (0)
0111
0112 #define UDIV_NEEDS_NORMALIZATION 1
0113
0114 #define abort() \
0115     return 0
0116
0117 #ifdef __BIG_ENDIAN
0118 #define __BYTE_ORDER __BIG_ENDIAN
0119 #else
0120 #define __BYTE_ORDER __LITTLE_ENDIAN
0121 #endif