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1.1 root 1: /*
2: * Copyright (c) 1999 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * Portions Copyright (c) 1999 Apple Computer, Inc. All Rights
7: * Reserved. This file contains Original Code and/or Modifications of
8: * Original Code as defined in and that are subject to the Apple Public
9: * Source License Version 1.1 (the "License"). You may not use this file
10: * except in compliance with the License. Please obtain a copy of the
11: * License at http://www.apple.com/publicsource and read it before using
12: * this file.
13: *
14: * The Original Code and all software distributed under the License are
15: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
16: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
17: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
18: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
19: * License for the specific language governing rights and limitations
20: * under the License.
21: *
22: * @APPLE_LICENSE_HEADER_END@
23: */
24:
25: // *************************************************************************
26: //
27: // fp_emul.h
28: // ================================================================
29: // intel corporation proprietary information
30: // this software is supplied under the terms of a license
31: // agreement or non-disclosure agreement with intel corporation
32: // and may not be copied nor disclosed except in accordance with
33: // the terms of that agreement.
34: // ================================================================
35: //
36: // ****************************************************************************
37:
38: /*
39: * to turn off counters that track number of traps and number of instructions.
40: */
41: /* #define FP_COUNTERS */
42:
43: /*
44: * Structure to represent state of stack to the floating point emulation code.
45: */
46:
47: typedef struct fp_emul_work {
48: u_char mem_operand_pointer[6];
49: short filler0;
50: u_char instruction_pointer[6];
51: u_char operation_type;
52: u_char reg_num;
53: u_char op1_format;
54: u_char op1_location;
55: u_char op1_use_up;
56:
57: u_char op2_format;
58: u_char op2_location;
59: u_char op2_use_up;
60:
61: u_char result_format;
62: u_char result_location;
63:
64: u_char result2_format;
65: u_char result2_location;
66:
67: u_long dword_frac1[3];
68: u_char sign1;
69: u_char sign1_ext;
70: u_char tag1;
71: u_char tag1_ext;
72: u_short expon1;
73: u_short expon1_ext;
74:
75: u_long dword_frac2[3];
76: u_char sign2;
77: u_char sign2_ext;
78: u_char tag2;
79: u_char tag2_ext;
80: u_char expon2;
81: u_char expon2_ext;
82:
83: u_long before_error_signals;
84: u_long extra_dword_reg[3];
85: u_long result_dword_frac[3];
86: u_char result_sign;
87: u_char result_sign_ext;
88: u_char result_tag;
89: u_char result_tag_ext;
90: u_short result_expon;
91: u_short result_expon_ext;
92:
93: u_long result2_dword_frac[3];
94: u_char result2_sign;
95: u_char result2_sign_ext;
96: u_char result2_tag;
97: u_char result2_tag_ext;
98: u_short result2_expon;
99: u_short result2_expon_ext;
100:
101: u_long dword_cop[3];
102: u_long dword_dop[3];
103:
104: u_char oprnd_siz32;
105: u_char addrs_siz32;
106:
107: u_long fpstate_ptr; /* pointer to fp state in pcb */
108: u_char is16bit;
109: u_long inst_counter; /* counter of loops thru emulator*/
110: } fp_emul_work_t;
111:
112: typedef struct fp_emul_state {
113:
114: fp_emul_work_t emul_work_area;
115:
116: regs_t emul_regs;
117:
118: u_long trapno;
119: except_frame_t emul_frame;
120:
121: } fp_emul_state_t ;
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