| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* $Id: sfp-util.h,v 1.5 2001/06/10 06:48:46 davem Exp $ |
| 2 | * arch/sparc64/math-emu/sfp-util.h |
| 3 | * |
| 4 | * Copyright (C) 1999 Jakub Jelinek (jj@ultra.linux.cz) |
| 5 | * Copyright (C) 1999 David S. Miller (davem@redhat.com) |
| 6 | * |
| 7 | */ |
| 8 | |
| 9 | #include <linux/kernel.h> |
| 10 | #include <linux/sched.h> |
| 11 | #include <linux/types.h> |
| 12 | #include <asm/byteorder.h> |
| 13 | |
| 14 | #define add_ssaaaa(sh, sl, ah, al, bh, bl) \ |
| 15 | __asm__ ("addcc %4,%5,%1\n\t" \ |
| 16 | "add %2,%3,%0\n\t" \ |
| 17 | "bcs,a,pn %%xcc, 1f\n\t" \ |
| 18 | "add %0, 1, %0\n" \ |
| 19 | "1:" \ |
| 20 | : "=r" ((UDItype)(sh)), \ |
| 21 | "=&r" ((UDItype)(sl)) \ |
| 22 | : "r" ((UDItype)(ah)), \ |
| 23 | "r" ((UDItype)(bh)), \ |
| 24 | "r" ((UDItype)(al)), \ |
| 25 | "r" ((UDItype)(bl)) \ |
| 26 | : "cc") |
| 27 | |
| 28 | #define sub_ddmmss(sh, sl, ah, al, bh, bl) \ |
| 29 | __asm__ ("subcc %4,%5,%1\n\t" \ |
| 30 | "sub %2,%3,%0\n\t" \ |
| 31 | "bcs,a,pn %%xcc, 1f\n\t" \ |
| 32 | "sub %0, 1, %0\n" \ |
| 33 | "1:" \ |
| 34 | : "=r" ((UDItype)(sh)), \ |
| 35 | "=&r" ((UDItype)(sl)) \ |
| 36 | : "r" ((UDItype)(ah)), \ |
| 37 | "r" ((UDItype)(bh)), \ |
| 38 | "r" ((UDItype)(al)), \ |
| 39 | "r" ((UDItype)(bl)) \ |
| 40 | : "cc") |
| 41 | |
| 42 | #define umul_ppmm(wh, wl, u, v) \ |
| 43 | do { \ |
| 44 | UDItype tmp1, tmp2, tmp3, tmp4; \ |
| 45 | __asm__ __volatile__ ( \ |
| 46 | "srl %7,0,%3\n\t" \ |
| 47 | "mulx %3,%6,%1\n\t" \ |
| 48 | "srlx %6,32,%2\n\t" \ |
| 49 | "mulx %2,%3,%4\n\t" \ |
| 50 | "sllx %4,32,%5\n\t" \ |
| 51 | "srl %6,0,%3\n\t" \ |
| 52 | "sub %1,%5,%5\n\t" \ |
| 53 | "srlx %5,32,%5\n\t" \ |
| 54 | "addcc %4,%5,%4\n\t" \ |
| 55 | "srlx %7,32,%5\n\t" \ |
| 56 | "mulx %3,%5,%3\n\t" \ |
| 57 | "mulx %2,%5,%5\n\t" \ |
| 58 | "sethi %%hi(0x80000000),%2\n\t" \ |
| 59 | "addcc %4,%3,%4\n\t" \ |
| 60 | "srlx %4,32,%4\n\t" \ |
| 61 | "add %2,%2,%2\n\t" \ |
| 62 | "movcc %%xcc,%%g0,%2\n\t" \ |
| 63 | "addcc %5,%4,%5\n\t" \ |
| 64 | "sllx %3,32,%3\n\t" \ |
| 65 | "add %1,%3,%1\n\t" \ |
| 66 | "add %5,%2,%0" \ |
| 67 | : "=r" ((UDItype)(wh)), \ |
| 68 | "=&r" ((UDItype)(wl)), \ |
| 69 | "=&r" (tmp1), "=&r" (tmp2), "=&r" (tmp3), "=&r" (tmp4) \ |
| 70 | : "r" ((UDItype)(u)), \ |
| 71 | "r" ((UDItype)(v)) \ |
| 72 | : "cc"); \ |
| 73 | } while (0) |
| 74 | |
| 75 | #define udiv_qrnnd(q, r, n1, n0, d) \ |
| 76 | do { \ |
| 77 | UWtype __d1, __d0, __q1, __q0, __r1, __r0, __m; \ |
| 78 | __d1 = (d >> 32); \ |
| 79 | __d0 = (USItype)d; \ |
| 80 | \ |
| 81 | __r1 = (n1) % __d1; \ |
| 82 | __q1 = (n1) / __d1; \ |
| 83 | __m = (UWtype) __q1 * __d0; \ |
| 84 | __r1 = (__r1 << 32) | (n0 >> 32); \ |
| 85 | if (__r1 < __m) \ |
| 86 | { \ |
| 87 | __q1--, __r1 += (d); \ |
| 88 | if (__r1 >= (d)) /* i.e. we didn't get carry when adding to __r1 */ \ |
| 89 | if (__r1 < __m) \ |
| 90 | __q1--, __r1 += (d); \ |
| 91 | } \ |
| 92 | __r1 -= __m; \ |
| 93 | \ |
| 94 | __r0 = __r1 % __d1; \ |
| 95 | __q0 = __r1 / __d1; \ |
| 96 | __m = (UWtype) __q0 * __d0; \ |
| 97 | __r0 = (__r0 << 32) | ((USItype)n0); \ |
| 98 | if (__r0 < __m) \ |
| 99 | { \ |
| 100 | __q0--, __r0 += (d); \ |
| 101 | if (__r0 >= (d)) \ |
| 102 | if (__r0 < __m) \ |
| 103 | __q0--, __r0 += (d); \ |
| 104 | } \ |
| 105 | __r0 -= __m; \ |
| 106 | \ |
| 107 | (q) = (UWtype) (__q1 << 32) | __q0; \ |
| 108 | (r) = __r0; \ |
| 109 | } while (0) |
| 110 | |
| 111 | #define UDIV_NEEDS_NORMALIZATION 1 |
| 112 | |
| 113 | #define abort() \ |
| 114 | return 0 |
| 115 | |
| 116 | #ifdef __BIG_ENDIAN |
| 117 | #define __BYTE_ORDER __BIG_ENDIAN |
| 118 | #else |
| 119 | #define __BYTE_ORDER __LITTLE_ENDIAN |
| 120 | #endif |