Annotation of sys/arch/m68k/fpe/fpu_fmovecr.c, Revision 1.1
1.1 ! nbrk 1: /* $OpenBSD: fpu_fmovecr.c,v 1.8 2006/06/11 20:43:28 miod Exp $ */
! 2: /* $NetBSD: fpu_fmovecr.c,v 1.10 2003/07/15 02:43:09 lukem Exp $ */
! 3:
! 4: /*
! 5: * Copyright (c) 1995 Ken Nakata
! 6: * All rights reserved.
! 7: *
! 8: * Redistribution and use in source and binary forms, with or without
! 9: * modification, are permitted provided that the following conditions
! 10: * are met:
! 11: * 1. Redistributions of source code must retain the above copyright
! 12: * notice, this list of conditions and the following disclaimer.
! 13: * 2. Redistributions in binary form must reproduce the above copyright
! 14: * notice, this list of conditions and the following disclaimer in the
! 15: * documentation and/or other materials provided with the distribution.
! 16: * 3. Neither the name of the author nor the names of its contributors
! 17: * may be used to endorse or promote products derived from this software
! 18: * without specific prior written permission.
! 19: *
! 20: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
! 21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
! 22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
! 23: * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
! 24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
! 25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
! 26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
! 27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
! 28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
! 29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
! 30: * SUCH DAMAGE.
! 31: *
! 32: * @(#)fpu_fmovecr.c 10/8/95
! 33: */
! 34:
! 35: #include <sys/param.h>
! 36: #include <sys/systm.h>
! 37: #include <machine/frame.h>
! 38:
! 39: #include <m68k/fpe/fpu_emulate.h>
! 40:
! 41: /* XXX: quick consistency check */
! 42: #if (FP_1 != 0x40000)
! 43: Error you have to change this table when changing the mantissa size
! 44: #endif
! 45:
! 46: static struct fpn constrom[] = {
! 47: /* fp_class, fp_sign, fp_exp, fp_sticky, fp_mant[0] ... [2] */
! 48: { FPC_NUM, 0, 1, 0, { 0x6487e, 0xd5110b46, 0x11a80000 } },
! 49: { FPC_NUM, 0, -2, 0, { 0x4d104, 0xd427de7f, 0xbcc00000 } },
! 50: { FPC_NUM, 0, 1, 0, { 0x56fc2, 0xa2c515da, 0x54d00000 } },
! 51: { FPC_NUM, 0, 0, 0, { 0x5c551, 0xd94ae0bf, 0x85e00000 } },
! 52: { FPC_NUM, 0, -2, 0, { 0x6f2de, 0xc549b943, 0x8ca80000 } },
! 53: { FPC_ZERO, 0, 0, 0, { 0x0, 0x0, 0x0 } },
! 54: { FPC_NUM, 0, -1, 0, { 0x58b90, 0xbfbe8e7b, 0xcd600000 } },
! 55: { FPC_NUM, 0, 1, 0, { 0x49aec, 0x6eed5545, 0x60b80000 } },
! 56: { FPC_NUM, 0, 0, 0, { 0x40000, 0x0, 0x0 } },
! 57: { FPC_NUM, 0, 3, 0, { 0x50000, 0x0, 0x0 } },
! 58: { FPC_NUM, 0, 6, 0, { 0x64000, 0x0, 0x0 } },
! 59: { FPC_NUM, 0, 13, 0, { 0x4e200, 0x0, 0x0 } },
! 60: { FPC_NUM, 0, 26, 0, { 0x5f5e1, 0x0, 0x0 } },
! 61: { FPC_NUM, 0, 53, 0, { 0x470de, 0x4df82000, 0x0 } },
! 62: { FPC_NUM, 0, 106, 0, { 0x4ee2d, 0x6d415b85, 0xacf00000 } },
! 63: { FPC_NUM, 0, 212, 0, { 0x613c0, 0xfa4ffe7d, 0x36a80000 } },
! 64: { FPC_NUM, 0, 425, 0, { 0x49dd2, 0x3e4c074c, 0x67000000 } },
! 65: { FPC_NUM, 0, 850, 0, { 0x553f7, 0x5fdcefce, 0xf4700000 } },
! 66: { FPC_NUM, 0, 1700, 0, { 0x718cd, 0x5753074, 0x8e380000 } },
! 67: { FPC_NUM, 0, 3401, 0, { 0x64bb3, 0xac340ba8, 0x60b80000 } },
! 68: { FPC_NUM, 0, 6803, 0, { 0x4f459, 0xdaee29ea, 0xef280000 } },
! 69: { FPC_NUM, 0, 13606, 0, { 0x62302, 0x90145104, 0xbcd80000 } },
! 70: };
! 71:
! 72: struct fpn *
! 73: fpu_const(fp, offset)
! 74: struct fpn *fp;
! 75: u_int offset;
! 76: {
! 77: struct fpn *r;
! 78:
! 79: #ifdef DEBUG
! 80: if (fp == NULL) {
! 81: panic("fpu_const: NULL pointer passed");
! 82: }
! 83: #endif
! 84: if (offset == 0) {
! 85: r = &constrom[0];
! 86: } else if (0xb <= offset && offset <= 0xe) {
! 87: r = &constrom[offset - 0xb + 1];
! 88: } else if (0x30 <= offset && offset <= 0x3f) {
! 89: r = &constrom[offset - 0x30 + 6];
! 90: } else {
! 91: /* return 0.0 for anything else (incl. valid offset 0xf) */
! 92: r = &constrom[5];
! 93: }
! 94:
! 95: CPYFPN(fp, r);
! 96:
! 97: return fp;
! 98: }
! 99:
! 100: int
! 101: fpu_emul_fmovecr(struct fpemu *fe, struct instruction *insn, int *typ)
! 102: {
! 103: int dstreg, offset;
! 104: u_int *fpreg;
! 105:
! 106: dstreg = (insn->is_word1 >> 7) & 0x7;
! 107: offset = insn->is_word1 & 0x7F;
! 108: fpreg = &(fe->fe_fpframe->fpf_regs[0]);
! 109:
! 110: (void)fpu_const(&fe->fe_f3, offset);
! 111: (void)fpu_upd_fpsr(fe, &fe->fe_f3);
! 112: fpu_implode(fe, &fe->fe_f3, FTYPE_EXT, &fpreg[dstreg * 3]);
! 113: #if DEBUG_FPE
! 114: printf(" fpu_emul_fmovecr: result %08x,%08x,%08x to FP%d\n",
! 115: fpreg[dstreg * 3], fpreg[dstreg * 3 + 1], fpreg[dstreg * 3 + 2],
! 116: dstreg);
! 117: #endif
! 118: return 0;
! 119: }
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