divdi3.S revision 1.2.14.2
1 1.2.14.2 yamt .file "__divdi3.s" 2 1.2.14.2 yamt 3 1.2.14.2 yamt // $NetBSD: divdi3.S,v 1.2.14.2 2006/06/21 15:10:22 yamt Exp $ 4 1.2.14.2 yamt 5 1.2.14.2 yamt //- 6 1.2.14.2 yamt // Copyright (c) 2000, Intel Corporation 7 1.2.14.2 yamt // All rights reserved. 8 1.2.14.2 yamt // 9 1.2.14.2 yamt // Contributed 2/15/2000 by Marius Cornea, John Harrison, Cristina Iordache, 10 1.2.14.2 yamt // Ted Kubaska, Bob Norin, and Shane Story of the Computational Software Lab, 11 1.2.14.2 yamt // Intel Corporation. 12 1.2.14.2 yamt // 13 1.2.14.2 yamt // WARRANTY DISCLAIMER 14 1.2.14.2 yamt // 15 1.2.14.2 yamt // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 1.2.14.2 yamt // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 1.2.14.2 yamt // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 1.2.14.2 yamt // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS 19 1.2.14.2 yamt // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 1.2.14.2 yamt // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 1.2.14.2 yamt // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 1.2.14.2 yamt // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 1.2.14.2 yamt // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING 24 1.2.14.2 yamt // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 1.2.14.2 yamt // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 1.2.14.2 yamt // 27 1.2.14.2 yamt // Intel Corporation is the author of this code, and requests that all 28 1.2.14.2 yamt // problem reports or change requests be submitted to it directly at 29 1.2.14.2 yamt // http://developer.intel.com/opensource. 30 1.2.14.2 yamt // 31 1.2.14.2 yamt 32 1.2.14.2 yamt .section .text 33 1.2.14.2 yamt .proc __divdi3# 34 1.2.14.2 yamt .align 32 35 1.2.14.2 yamt .global __divdi3# 36 1.2.14.2 yamt .align 32 37 1.2.14.2 yamt 38 1.2.14.2 yamt // 64-bit signed integer divide 39 1.2.14.2 yamt 40 1.2.14.2 yamt __divdi3: 41 1.2.14.2 yamt 42 1.2.14.2 yamt { .mii 43 1.2.14.2 yamt alloc r31=ar.pfs,2,0,0,0 44 1.2.14.2 yamt nop.i 0 45 1.2.14.2 yamt nop.i 0;; 46 1.2.14.2 yamt } { .mmi 47 1.2.14.2 yamt 48 1.2.14.2 yamt // 64-BIT SIGNED INTEGER DIVIDE BEGINS HERE 49 1.2.14.2 yamt 50 1.2.14.2 yamt setf.sig f8=r32 51 1.2.14.2 yamt setf.sig f9=r33 52 1.2.14.2 yamt nop.i 0;; 53 1.2.14.2 yamt } { .mfb 54 1.2.14.2 yamt nop.m 0 55 1.2.14.2 yamt fcvt.xf f6=f8 56 1.2.14.2 yamt nop.b 0 57 1.2.14.2 yamt } { .mfb 58 1.2.14.2 yamt nop.m 0 59 1.2.14.2 yamt fcvt.xf f7=f9 60 1.2.14.2 yamt nop.b 0;; 61 1.2.14.2 yamt } { .mfi 62 1.2.14.2 yamt nop.m 0 63 1.2.14.2 yamt // Step (1) 64 1.2.14.2 yamt // y0 = 1 / b in f8 65 1.2.14.2 yamt frcpa.s1 f8,p6=f6,f7 66 1.2.14.2 yamt nop.i 0;; 67 1.2.14.2 yamt } { .mfi 68 1.2.14.2 yamt nop.m 0 69 1.2.14.2 yamt // Step (2) 70 1.2.14.2 yamt // e0 = 1 - b * y0 in f9 71 1.2.14.2 yamt (p6) fnma.s1 f9=f7,f8,f1 72 1.2.14.2 yamt nop.i 0 73 1.2.14.2 yamt } { .mfi 74 1.2.14.2 yamt nop.m 0 75 1.2.14.2 yamt // Step (3) 76 1.2.14.2 yamt // q0 = a * y0 in f10 77 1.2.14.2 yamt (p6) fma.s1 f10=f6,f8,f0 78 1.2.14.2 yamt nop.i 0;; 79 1.2.14.2 yamt } { .mfi 80 1.2.14.2 yamt nop.m 0 81 1.2.14.2 yamt // Step (4) 82 1.2.14.2 yamt // e1 = e0 * e0 in f11 83 1.2.14.2 yamt (p6) fma.s1 f11=f9,f9,f0 84 1.2.14.2 yamt nop.i 0 85 1.2.14.2 yamt } { .mfi 86 1.2.14.2 yamt nop.m 0 87 1.2.14.2 yamt // Step (5) 88 1.2.14.2 yamt // q1 = q0 + e0 * q0 in f10 89 1.2.14.2 yamt (p6) fma.s1 f10=f9,f10,f10 90 1.2.14.2 yamt nop.i 0;; 91 1.2.14.2 yamt } { .mfi 92 1.2.14.2 yamt nop.m 0 93 1.2.14.2 yamt // Step (6) 94 1.2.14.2 yamt // y1 = y0 + e0 * y0 in f8 95 1.2.14.2 yamt (p6) fma.s1 f8=f9,f8,f8 96 1.2.14.2 yamt nop.i 0;; 97 1.2.14.2 yamt } { .mfi 98 1.2.14.2 yamt nop.m 0 99 1.2.14.2 yamt // Step (7) 100 1.2.14.2 yamt // q2 = q1 + e1 * q1 in f9 101 1.2.14.2 yamt (p6) fma.s1 f9=f11,f10,f10 102 1.2.14.2 yamt nop.i 0;; 103 1.2.14.2 yamt } { .mfi 104 1.2.14.2 yamt nop.m 0 105 1.2.14.2 yamt // Step (8) 106 1.2.14.2 yamt // y2 = y1 + e1 * y1 in f8 107 1.2.14.2 yamt (p6) fma.s1 f8=f11,f8,f8 108 1.2.14.2 yamt nop.i 0;; 109 1.2.14.2 yamt } { .mfi 110 1.2.14.2 yamt nop.m 0 111 1.2.14.2 yamt // Step (9) 112 1.2.14.2 yamt // r2 = a - b * q2 in f10 113 1.2.14.2 yamt (p6) fnma.s1 f10=f7,f9,f6 114 1.2.14.2 yamt nop.i 0;; 115 1.2.14.2 yamt } { .mfi 116 1.2.14.2 yamt nop.m 0 117 1.2.14.2 yamt // Step (10) 118 1.2.14.2 yamt // q3 = q2 + r2 * y2 in f8 119 1.2.14.2 yamt (p6) fma.s1 f8=f10,f8,f9 120 1.2.14.2 yamt nop.i 0;; 121 1.2.14.2 yamt } { .mfb 122 1.2.14.2 yamt nop.m 0 123 1.2.14.2 yamt // Step (11) 124 1.2.14.2 yamt // q = trunc (q3) 125 1.2.14.2 yamt fcvt.fx.trunc.s1 f8=f8 126 1.2.14.2 yamt nop.b 0;; 127 1.2.14.2 yamt } { .mmi 128 1.2.14.2 yamt // quotient will be in r8 (if b != 0) 129 1.2.14.2 yamt getf.sig r8=f8 130 1.2.14.2 yamt nop.m 0 131 1.2.14.2 yamt nop.i 0;; 132 1.2.14.2 yamt } 133 1.2.14.2 yamt 134 1.2.14.2 yamt // 64-BIT SIGNED INTEGER DIVIDE ENDS HERE 135 1.2.14.2 yamt 136 1.2.14.2 yamt { .mmb 137 1.2.14.2 yamt nop.m 0 138 1.2.14.2 yamt nop.m 0 139 1.2.14.2 yamt br.ret.sptk b0;; 140 1.2.14.2 yamt } 141 1.2.14.2 yamt 142 1.2.14.2 yamt .endp __divdi3 143
Indexes created Mon Sep 29 21:09:56 GMT 2025