1 /* $NetBSD: altivec_subr.S,v 1.3 2020/07/06 09:34:17 rin Exp $ */ 2 /*- 3 * Copyright (c) 2011 The NetBSD Foundation, Inc. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to The NetBSD Foundation 7 * by Matt Thomas of 3am Software Foundry. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 19 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 20 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 21 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 22 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 23 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 24 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 25 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 26 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 27 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 28 * POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 RCSID("$NetBSD: altivec_subr.S,v 1.3 2020/07/06 09:34:17 rin Exp $") 32 33 #ifdef _KERNEL_OPT 34 #include "opt_altivec.h" 35 #endif 36 37 #ifdef ALTIVEC 38 /* 39 * LINTSTUB: void vec_load_from_vreg(const struct vreg *vreg); 40 */ 41 ENTRY(vec_load_from_vreg) 42 /* 43 * Restore VSCR by first loading it into a vector and then into 44 * VSCR. (this needs to done before loading the user's vector 45 * registers since we need to use a scratch vector register) 46 */ 47 vxor %v0,%v0,%v0 48 li %r4,VREG_VSCR; lvewx %v0,%r3,%r4 49 mtvscr %v0 50 51 /* 52 * Now load the vector registers. We do it this way so that if on 53 * a superscalar cpu, we can get some concurrency. 54 */ 55 li %r4,VREG_V0; lvx %v0,%r3,%r4 56 li %r5,VREG_V1; lvx %v1,%r3,%r5 57 li %r6,VREG_V2; lvx %v2,%r3,%r6 58 li %r7,VREG_V3; lvx %v3,%r3,%r7 59 60 li %r4,VREG_V4; lvx %v4,%r3,%r4 61 li %r5,VREG_V5; lvx %v5,%r3,%r5 62 li %r6,VREG_V6; lvx %v6,%r3,%r6 63 li %r7,VREG_V7; lvx %v7,%r3,%r7 64 65 li %r4,VREG_V8; lvx %v8,%r3,%r4 66 li %r5,VREG_V9; lvx %v9,%r3,%r5 67 li %r6,VREG_V10; lvx %v10,%r3,%r6 68 li %r7,VREG_V11; lvx %v11,%r3,%r7 69 70 li %r4,VREG_V12; lvx %v12,%r3,%r4 71 li %r5,VREG_V13; lvx %v13,%r3,%r5 72 li %r6,VREG_V14; lvx %v14,%r3,%r6 73 li %r7,VREG_V15; lvx %v15,%r3,%r7 74 75 li %r4,VREG_V16; lvx %v16,%r3,%r4 76 li %r5,VREG_V17; lvx %v17,%r3,%r5 77 li %r6,VREG_V18; lvx %v18,%r3,%r6 78 li %r7,VREG_V19; lvx %v19,%r3,%r7 79 80 li %r4,VREG_V20; lvx %v20,%r3,%r4 81 li %r5,VREG_V21; lvx %v21,%r3,%r5 82 li %r6,VREG_V22; lvx %v22,%r3,%r6 83 li %r7,VREG_V23; lvx %v23,%r3,%r7 84 85 li %r4,VREG_V24; lvx %v24,%r3,%r4 86 li %r5,VREG_V25; lvx %v25,%r3,%r5 87 li %r6,VREG_V26; lvx %v26,%r3,%r6 88 li %r7,VREG_V27; lvx %v27,%r3,%r7 89 90 li %r4,VREG_V28; lvx %v28,%r3,%r4 91 li %r5,VREG_V29; lvx %v29,%r3,%r5 92 li %r6,VREG_V30; lvx %v30,%r3,%r6 93 li %r7,VREG_V31; lvx %v31,%r3,%r7 94 95 isync 96 blr 97 END(vec_load_from_vreg) 98 99 /* 100 * LINTSTUB: void vec_unload_to_vreg(struct vreg *vreg); 101 */ 102 ENTRY(vec_unload_to_vreg) 103 /* 104 * Store the vector registers. We do it this way so that if on 105 * a superscalar cpu, we can get some concurrency. 106 */ 107 li %r4,VREG_V0; stvx %v0,%r3,%r4 108 li %r5,VREG_V1; stvx %v1,%r3,%r5 109 li %r6,VREG_V2; stvx %v2,%r3,%r6 110 li %r7,VREG_V3; stvx %v3,%r3,%r7 111 112 li %r4,VREG_V4; stvx %v4,%r3,%r4 113 li %r5,VREG_V5; stvx %v5,%r3,%r5 114 li %r6,VREG_V6; stvx %v6,%r3,%r6 115 li %r7,VREG_V7; stvx %v7,%r3,%r7 116 117 li %r4,VREG_V8; stvx %v8,%r3,%r4 118 li %r5,VREG_V9; stvx %v9,%r3,%r5 119 li %r6,VREG_V10; stvx %v10,%r3,%r6 120 li %r7,VREG_V11; stvx %v11,%r3,%r7 121 122 li %r4,VREG_V12; stvx %v12,%r3,%r4 123 li %r5,VREG_V13; stvx %v13,%r3,%r5 124 li %r6,VREG_V14; stvx %v14,%r3,%r6 125 li %r7,VREG_V15; stvx %v15,%r3,%r7 126 127 li %r4,VREG_V16; stvx %v16,%r3,%r4 128 li %r5,VREG_V17; stvx %v17,%r3,%r5 129 li %r6,VREG_V18; stvx %v18,%r3,%r6 130 li %r7,VREG_V19; stvx %v19,%r3,%r7 131 132 li %r4,VREG_V20; stvx %v20,%r3,%r4 133 li %r5,VREG_V21; stvx %v21,%r3,%r5 134 li %r6,VREG_V22; stvx %v22,%r3,%r6 135 li %r7,VREG_V23; stvx %v23,%r3,%r7 136 137 li %r4,VREG_V24; stvx %v24,%r3,%r4 138 li %r5,VREG_V25; stvx %v25,%r3,%r5 139 li %r6,VREG_V26; stvx %v26,%r3,%r6 140 li %r7,VREG_V27; stvx %v27,%r3,%r7 141 142 li %r4,VREG_V28; stvx %v28,%r3,%r4 143 li %r5,VREG_V29; stvx %v29,%r3,%r5 144 li %r6,VREG_V30; stvx %v30,%r3,%r6 145 li %r7,VREG_V31; stvx %v31,%r3,%r7 146 147 /* 148 * Save VSCR but remember to restore the vector that used to save it. 149 */ 150 mfvscr %v31 151 li %r4,VREG_VSCR; stvewx %v31,%r3,%r4 /* low word only */ 152 153 lvx %v31,%r3,%r7 /* restore v31 */ 154 155 isync 156 blr 157 END(vec_load_from_vreg) 158 #endif /* ALTIVEC */ 159
Indexes created Sat Sep 20 22:09:52 GMT 2025