1 /* $NetBSD: fpu_fstore.c,v 1.5 1996/10/13 03:19:17 christos Exp $ */ 2 3 /* 4 * Copyright (c) 1995 Ken Nakata 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/signal.h> 30 #include <sys/systm.h> 31 #include <machine/frame.h> 32 33 #include "fpu_emulate.h" 34 35 /* 36 * type 0: fmove mem/fpr->fpr 37 * In this function, we know 38 * (opcode & 0x01c0) == 0 39 * (word1 & 0xe000) == 0x6000 40 */ 41 int 42 fpu_emul_fstore(fe, insn) 43 struct fpemu *fe; 44 struct instruction *insn; 45 { 46 struct frame *frame = fe->fe_frame; 47 u_int *fpregs = fe->fe_fpframe->fpf_regs; 48 int word1, sig; 49 int regnum; 50 int format; 51 u_int buf[3]; 52 53 if (fpu_debug_level & DL_FSTORE) { 54 printf(" fpu_emul_fstore: frame at %p fpframe at %p\n", 55 frame, fe->fe_fpframe); 56 } 57 58 word1 = insn->is_word1; 59 format = (word1 >> 10) & 7; 60 regnum = (word1 >> 7) & 7; 61 62 insn->is_advance = 4; 63 64 if (format == FTYPE_DBL) { 65 insn->is_datasize = 8; 66 } else if (format == FTYPE_SNG || format == FTYPE_LNG) { 67 insn->is_datasize = 4; 68 } else if (format == FTYPE_WRD) { 69 insn->is_datasize = 2; 70 format = FTYPE_LNG; 71 } else if (format == FTYPE_BYT) { 72 insn->is_datasize = 1; 73 format = FTYPE_LNG; 74 } else if (format == FTYPE_EXT) { 75 insn->is_datasize = 12; 76 } else { 77 /* invalid or unsupported operand format */ 78 if (fpu_debug_level & DL_FSTORE) { 79 printf(" fpu_emul_fstore: invalid format %d\n", format); 80 } 81 sig = SIGFPE; 82 } 83 if (fpu_debug_level & DL_FSTORE) { 84 printf(" fpu_emul_fstore: format %d, size %d\n", 85 format, insn->is_datasize); 86 } 87 88 /* Get effective address. (modreg=opcode&077) */ 89 sig = fpu_decode_ea(frame, insn, &insn->is_ea0, insn->is_opcode); 90 if (sig) { 91 if (fpu_debug_level & DL_FSTORE) { 92 printf(" fpu_emul_fstore: failed in decode_ea sig=%d\n", sig); 93 } 94 return sig; 95 } 96 97 if (insn->is_datasize > 4 && insn->is_ea0.ea_flags == EA_DIRECT) { 98 /* trying to store dbl or ext into a data register */ 99 #ifdef DEBUG 100 printf(" fpu_fstore: attempted to store dbl/ext to reg\n"); 101 #endif 102 return SIGILL; 103 } 104 105 if (fpu_debug_level & DL_OPERANDS) 106 printf(" fpu_emul_fstore: saving FP%d (%08x,%08x,%08x)\n", 107 regnum, fpregs[regnum * 3], fpregs[regnum * 3 + 1], 108 fpregs[regnum * 3 + 2]); 109 fpu_explode(fe, &fe->fe_f3, FTYPE_EXT, &fpregs[regnum * 3]); 110 if (fpu_debug_level & DL_VALUES) { 111 static char *class_name[] = { "SNAN", "QNAN", "ZERO", "NUM", "INF" }; 112 printf(" fpu_emul_fstore: fpn (%s,%c,%d,%08x,%08x,%08x,%08x)\n", 113 class_name[fe->fe_f3.fp_class + 2], 114 fe->fe_f3.fp_sign ? '-' : '+', fe->fe_f3.fp_exp, 115 fe->fe_f3.fp_mant[0], fe->fe_f3.fp_mant[1], 116 fe->fe_f3.fp_mant[2], fe->fe_f3.fp_mant[3]); 117 } 118 fpu_implode(fe, &fe->fe_f3, format, buf); 119 120 fpu_store_ea(frame, insn, &insn->is_ea0, (char *)buf); 121 if (fpu_debug_level & DL_RESULT) 122 printf(" fpu_emul_fstore: %08x,%08x,%08x size %d\n", 123 buf[0], buf[1], buf[2], insn->is_datasize); 124 125 return 0; 126 } 127