1 /* SPDX-License-Identifier: GPL-2.0 */ 2 /* 3 * arch/sparc64/math-emu/sfp-util.h 4 * 5 * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz) 6 * Copyright (C) 1999 David S. Miller (davem@redhat.com) 7 * 8 */ 9 10 #include <linux/kernel.h> 11 #include <linux/sched.h> 12 #include <linux/types.h> 13 #include <asm/byteorder.h> 14 15 #define add_ssaaaa(sh, sl, ah, al, bh, bl) \ 16 __asm__ ("addcc %4,%5,%1\n\t" \ 17 "add %2,%3,%0\n\t" \ 18 "bcs,a,pn %%xcc, 1f\n\t" \ 19 "add %0, 1, %0\n" \ 20 "1:" \ 21 : "=r" (sh), \ 22 "=&r" (sl) \ 23 : "r" ((UDItype)(ah)), \ 24 "r" ((UDItype)(bh)), \ 25 "r" ((UDItype)(al)), \ 26 "r" ((UDItype)(bl)) \ 27 : "cc") 28 29 #define sub_ddmmss(sh, sl, ah, al, bh, bl) \ 30 __asm__ ("subcc %4,%5,%1\n\t" \ 31 "sub %2,%3,%0\n\t" \ 32 "bcs,a,pn %%xcc, 1f\n\t" \ 33 "sub %0, 1, %0\n" \ 34 "1:" \ 35 : "=r" (sh), \ 36 "=&r" (sl) \ 37 : "r" ((UDItype)(ah)), \ 38 "r" ((UDItype)(bh)), \ 39 "r" ((UDItype)(al)), \ 40 "r" ((UDItype)(bl)) \ 41 : "cc") 42 43 #define umul_ppmm(wh, wl, u, v) \ 44 do { \ 45 UDItype tmp1, tmp2, tmp3, tmp4; \ 46 __asm__ __volatile__ ( \ 47 "srl %7,0,%3\n\t" \ 48 "mulx %3,%6,%1\n\t" \ 49 "srlx %6,32,%2\n\t" \ 50 "mulx %2,%3,%4\n\t" \ 51 "sllx %4,32,%5\n\t" \ 52 "srl %6,0,%3\n\t" \ 53 "sub %1,%5,%5\n\t" \ 54 "srlx %5,32,%5\n\t" \ 55 "addcc %4,%5,%4\n\t" \ 56 "srlx %7,32,%5\n\t" \ 57 "mulx %3,%5,%3\n\t" \ 58 "mulx %2,%5,%5\n\t" \ 59 "sethi %%hi(0x80000000),%2\n\t" \ 60 "addcc %4,%3,%4\n\t" \ 61 "srlx %4,32,%4\n\t" \ 62 "add %2,%2,%2\n\t" \ 63 "movcc %%xcc,%%g0,%2\n\t" \ 64 "addcc %5,%4,%5\n\t" \ 65 "sllx %3,32,%3\n\t" \ 66 "add %1,%3,%1\n\t" \ 67 "add %5,%2,%0" \ 68 : "=r" (wh), \ 69 "=&r" (wl), \ 70 "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \ 71 : "r" ((UDItype)(u)), \ 72 "r" ((UDItype)(v)) \ 73 : "cc"); \ 74 } while (0) 75 76 #define udiv_qrnnd(q, r, n1, n0, d) \ 77 do { \ 78 UWtype __d1, __d0, __q1, __q0, __r1, __r0, __m; \ 79 __d1 = (d >> 32); \ 80 __d0 = (USItype)d; \ 81 \ 82 __r1 = (n1) % __d1; \ 83 __q1 = (n1) / __d1; \ 84 __m = (UWtype) __q1 * __d0; \ 85 __r1 = (__r1 << 32) | (n0 >> 32); \ 86 if (__r1 < __m) \ 87 { \ 88 __q1--, __r1 += (d); \ 89 if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */ \ 90 if (__r1 < __m) \ 91 __q1--, __r1 += (d); \ 92 } \ 93 __r1 -= __m; \ 94 \ 95 __r0 = __r1 % __d1; \ 96 __q0 = __r1 / __d1; \ 97 __m = (UWtype) __q0 * __d0; \ 98 __r0 = (__r0 << 32) | ((USItype)n0); \ 99 if (__r0 < __m) \ 100 { \ 101 __q0--, __r0 += (d); \ 102 if (__r0 >= (d)) \ 103 if (__r0 < __m) \ 104 __q0--, __r0 += (d); \ 105 } \ 106 __r0 -= __m; \ 107 \ 108 (q) = (UWtype) (__q1 << 32) | __q0; \ 109 (r) = __r0; \ 110 } while (0) 111 112 #define UDIV_NEEDS_NORMALIZATION 1 113 114 #define abort() \ 115 return 0 116 117 #ifdef __BIG_ENDIAN 118 #define __BYTE_ORDER __BIG_ENDIAN 119 #else 120 #define __BYTE_ORDER __LITTLE_ENDIAN 121 #endif 122