moddi3.S revision 1.2.4.2
1 1.2.4.2 elad .file "__moddi3.s" 2 1.2.4.2 elad 3 1.2.4.2 elad // $NetBSD: moddi3.S,v 1.2.4.2 2006/04/19 04:36:01 elad Exp $ 4 1.2.4.2 elad 5 1.2.4.2 elad //- 6 1.2.4.2 elad // Copyright (c) 2000, Intel Corporation 7 1.2.4.2 elad // All rights reserved. 8 1.2.4.2 elad // 9 1.2.4.2 elad // Contributed 2/15/2000 by Marius Cornea, John Harrison, Cristina Iordache, 10 1.2.4.2 elad // Ted Kubaska, Bob Norin, and Shane Story of the Computational Software Lab, 11 1.2.4.2 elad // Intel Corporation. 12 1.2.4.2 elad // 13 1.2.4.2 elad // WARRANTY DISCLAIMER 14 1.2.4.2 elad // 15 1.2.4.2 elad // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 1.2.4.2 elad // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 1.2.4.2 elad // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 18 1.2.4.2 elad // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL INTEL OR ITS 19 1.2.4.2 elad // CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 20 1.2.4.2 elad // EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21 1.2.4.2 elad // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 22 1.2.4.2 elad // PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 23 1.2.4.2 elad // OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY OR TORT (INCLUDING 24 1.2.4.2 elad // NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 25 1.2.4.2 elad // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 1.2.4.2 elad // 27 1.2.4.2 elad // Intel Corporation is the author of this code, and requests that all 28 1.2.4.2 elad // problem reports or change requests be submitted to it directly at 29 1.2.4.2 elad // http://developer.intel.com/opensource. 30 1.2.4.2 elad // 31 1.2.4.2 elad 32 1.2.4.2 elad .section .text 33 1.2.4.2 elad 34 1.2.4.2 elad // 64-bit signed integer remainder 35 1.2.4.2 elad 36 1.2.4.2 elad .proc __moddi3# 37 1.2.4.2 elad .align 32 38 1.2.4.2 elad .global __moddi3# 39 1.2.4.2 elad .align 32 40 1.2.4.2 elad 41 1.2.4.2 elad __moddi3: 42 1.2.4.2 elad 43 1.2.4.2 elad { .mii 44 1.2.4.2 elad alloc r31=ar.pfs,3,0,0,0 45 1.2.4.2 elad nop.i 0 46 1.2.4.2 elad nop.i 0 47 1.2.4.2 elad } { .mmb 48 1.2.4.2 elad 49 1.2.4.2 elad // 64-BIT SIGNED INTEGER REMAINDER BEGINS HERE 50 1.2.4.2 elad 51 1.2.4.2 elad // general register used: 52 1.2.4.2 elad // r32 - 64-bit signed integer dividend, called a below 53 1.2.4.2 elad // r33 - 64-bit signed integer divisor, called b below 54 1.2.4.2 elad // r8 - 64-bit signed integer result 55 1.2.4.2 elad // r2 - scratch register 56 1.2.4.2 elad // floating-point registers used: f6, f7, f8, f9, f10, f11, f12 57 1.2.4.2 elad // predicate registers used: p6 58 1.2.4.2 elad 59 1.2.4.2 elad setf.sig f12=r32 // holds a in integer form 60 1.2.4.2 elad setf.sig f7=r33 61 1.2.4.2 elad nop.b 0 62 1.2.4.2 elad } { .mlx 63 1.2.4.2 elad nop.m 0 64 1.2.4.2 elad //movl r2=0x8000000000000000;; 65 1.2.4.2 elad movl r2=0xffffffffffffffff;; 66 1.2.4.2 elad } { .mfi 67 1.2.4.2 elad // get the 2's complement of b 68 1.2.4.2 elad sub r33=r0,r33 69 1.2.4.2 elad fcvt.xf f6=f12 70 1.2.4.2 elad nop.i 0 71 1.2.4.2 elad } { .mfi 72 1.2.4.2 elad nop.m 0 73 1.2.4.2 elad fcvt.xf f7=f7 74 1.2.4.2 elad nop.i 0;; 75 1.2.4.2 elad } { .mfi 76 1.2.4.2 elad nop.m 0 77 1.2.4.2 elad // Step (1) 78 1.2.4.2 elad // y0 = 1 / b in f8 79 1.2.4.2 elad frcpa.s1 f8,p6=f6,f7 80 1.2.4.2 elad nop.i 0;; 81 1.2.4.2 elad } { .mfi 82 1.2.4.2 elad nop.m 0 83 1.2.4.2 elad // Step (2) 84 1.2.4.2 elad // q0 = a * y0 in f10 85 1.2.4.2 elad (p6) fma.s1 f10=f6,f8,f0 86 1.2.4.2 elad nop.i 0 87 1.2.4.2 elad } { .mfi 88 1.2.4.2 elad nop.m 0 89 1.2.4.2 elad // Step (3) 90 1.2.4.2 elad // e0 = 1 - b * y0 in f9 91 1.2.4.2 elad (p6) fnma.s1 f9=f7,f8,f1 92 1.2.4.2 elad nop.i 0;; 93 1.2.4.2 elad } { .mfi 94 1.2.4.2 elad nop.m 0 95 1.2.4.2 elad // Step (4) 96 1.2.4.2 elad // q1 = q0 + e0 * q0 in f10 97 1.2.4.2 elad (p6) fma.s1 f10=f9,f10,f10 98 1.2.4.2 elad nop.i 0 99 1.2.4.2 elad } { .mfi 100 1.2.4.2 elad nop.m 0 101 1.2.4.2 elad // Step (5) 102 1.2.4.2 elad // e1 = e0 * e0 in f11 103 1.2.4.2 elad (p6) fma.s1 f11=f9,f9,f0 104 1.2.4.2 elad nop.i 0;; 105 1.2.4.2 elad } { .mfi 106 1.2.4.2 elad nop.m 0 107 1.2.4.2 elad // Step (6) 108 1.2.4.2 elad // y1 = y0 + e0 * y0 in f8 109 1.2.4.2 elad (p6) fma.s1 f8=f9,f8,f8 110 1.2.4.2 elad nop.i 0;; 111 1.2.4.2 elad } { .mfi 112 1.2.4.2 elad nop.m 0 113 1.2.4.2 elad // Step (7) 114 1.2.4.2 elad // q2 = q1 + e1 * q1 in f9 115 1.2.4.2 elad (p6) fma.s1 f9=f11,f10,f10 116 1.2.4.2 elad nop.i 0;; 117 1.2.4.2 elad } { .mfi 118 1.2.4.2 elad nop.m 0 119 1.2.4.2 elad // Step (8) 120 1.2.4.2 elad // y2 = y1 + e1 * y1 in f8 121 1.2.4.2 elad (p6) fma.s1 f8=f11,f8,f8 122 1.2.4.2 elad nop.i 0;; 123 1.2.4.2 elad } { .mfi 124 1.2.4.2 elad nop.m 0 125 1.2.4.2 elad // Step (9) 126 1.2.4.2 elad // r2 = a - b * q2 in f10 127 1.2.4.2 elad (p6) fnma.s1 f10=f7,f9,f6 128 1.2.4.2 elad nop.i 0;; 129 1.2.4.2 elad } { .mfi 130 1.2.4.2 elad setf.sig f7=r33 131 1.2.4.2 elad // Step (10) 132 1.2.4.2 elad // q3 = q2 + r2 * y2 in f8 133 1.2.4.2 elad (p6) fma.s1 f8=f10,f8,f9 134 1.2.4.2 elad nop.i 0;; 135 1.2.4.2 elad } { .mfi 136 1.2.4.2 elad nop.m 0 137 1.2.4.2 elad // (11) q = trunc(q3) 138 1.2.4.2 elad fcvt.fx.trunc.s1 f8=f8 139 1.2.4.2 elad nop.i 0;; 140 1.2.4.2 elad } { .mfi 141 1.2.4.2 elad nop.m 0 142 1.2.4.2 elad // (12) r = a + (-b) * q 143 1.2.4.2 elad xma.l f8=f8,f7,f12 144 1.2.4.2 elad nop.i 0;; 145 1.2.4.2 elad } { .mib 146 1.2.4.2 elad getf.sig r8=f8 147 1.2.4.2 elad nop.i 0 148 1.2.4.2 elad nop.b 0 149 1.2.4.2 elad } 150 1.2.4.2 elad 151 1.2.4.2 elad // 64-BIT SIGNED INTEGER REMAINDER ENDS HERE 152 1.2.4.2 elad 153 1.2.4.2 elad { .mib 154 1.2.4.2 elad nop.m 0 155 1.2.4.2 elad nop.i 0 156 1.2.4.2 elad br.ret.sptk b0;; 157 1.2.4.2 elad } 158 1.2.4.2 elad 159 1.2.4.2 elad .endp __moddi3 160
Indexes created Mon Sep 29 21:09:56 GMT 2025