1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright (c) 1987 Sun Microsystems, Inc. 24 */ 25 26#ident "%Z%%M% %I% %E% SMI" 27 28 .file "stret.s" 29 30#include <sys/asm_linkage.h> 31 32#define FROM %o0 33#define SIZE %o1 34#define TO %i0 35#define MEMWORD %o3 /* use o-registers as temps */ 36#define TEMP %o4 37#define TEMP2 %o5 38#define UNIMP 0 39#define MASK 0x00000fff 40#define STRUCT_VAL_OFF (16*4) 41#if STRET4 42# define BYTES_PER_MOVE 4 43# define LD ld 44# define ST st 45 ENTRY2(.stret4,.stret8) 46#endif 47#if STRET2 48# define BYTES_PER_MOVE 2 49# define LD lduh 50# define ST sth 51 ENTRY(.stret2) 52#endif 53#if STRET1 54# define BYTES_PER_MOVE 1 55# define LD ldub 56# define ST stb 57 ENTRY(.stret1) 58#endif 59 60 /* 61 * see if key matches: if not, 62 * structure value not expected, 63 * so just return 64 */ 65 ld [%i7+8],MEMWORD 66 and SIZE,MASK,TEMP 67 sethi %hi(UNIMP),TEMP2 68 or TEMP,TEMP2,TEMP2 69 cmp TEMP2,MEMWORD 70 bne .LE12 71 .empty 72 /* 73 * set expected return value 74 */ 75.L14: 76 ld [%fp+STRUCT_VAL_OFF],TO /* (DELAY SLOT) */ 77 /* 78 * copy the struct using the same loop the compiler does 79 * for large structure assignment 80 */ 81.L15: 82 subcc SIZE,BYTES_PER_MOVE,SIZE 83 LD [FROM+SIZE],TEMP 84 bg .L15 85 ST TEMP,[TO+SIZE] /* (DELAY SLOT) */ 86 /* bump return address */ 87 add %i7,0x4,%i7 88.LE12: 89 jmp %i7+8 90 restore 91 92#if STRET4 93 SET_SIZE(.stret4) 94 SET_SIZE(.stret8) 95#endif 96#if STRET2 97 SET_SIZE(.stret2) 98#endif 99#if STRET1 100 SET_SIZE(.stret1) 101#endif 102