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Annotation of kernel/machdep/i386/fp_emul/fp_emul.h, revision 1.1

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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