| | |
| | x_unimp.sa 3.3 7/1/91 |
| | |
| | fpsp_unimp --- FPSP handler for unimplemented instruction |
| | exception. |
| | |
| | Invoked when the user program encounters a floating-point |
| | op-code that hardware does not support. Trap vector# 11 |
| | (See table 8-1 MC68030 User's Manual). |
| | |
| | |
| | Note: An fsave for an unimplemented inst. will create a short |
| | fsave stack. |
| | |
| | Input: 1. Six word stack frame for unimplemented inst, four word |
| | for illegal |
| | (See table 8-7 MC68030 User's Manual). |
| | 2. Unimp (short) fsave state frame created here by fsave |
| | instruction. |
| | |
| | |
| | Copyright (C) Motorola, Inc. 1990 |
| | All Rights Reserved |
| | |
| | THIS IS UNPUBLISHED PROPRIETARY SOURCE CODE OF MOTOROLA |
| | The copyright notice above does not evidence any |
| | actual or intended publication of such source code. |
| |
| X_UNIMP: |idnt 2,1 | Motorola 040 Floating Point Software Package |
| |
| |section 8 |
| |
| #include "fpsp.h" |
| |
| |xref get_op |
| |xref do_func |
| |xref sto_res |
| |xref gen_except |
| |xref fpsp_fmt_error |
| |
| .global fpsp_unimp |
| .global uni_2 |
| fpsp_unimp: |
| link %a6,#-LOCAL_SIZE |
| fsave -(%a7) |
| uni_2: |
| moveml %d0-%d1/%a0-%a1,USER_DA(%a6) |
| fmovemx %fp0-%fp3,USER_FP0(%a6) |
| fmoveml %fpcr/%fpsr/%fpiar,USER_FPCR(%a6) |
| moveb (%a7),%d0 |test for valid version num |
| andib #0xf0,%d0 |test for $4x |
| cmpib #VER_4,%d0 |must be $4x or exit |
| bnel fpsp_fmt_error |
| | |
| | Temporary D25B Fix |
| | The following lines are used to ensure that the FPSR |
| | exception byte and condition codes are clear before proceeding |
| | |
| movel USER_FPSR(%a6),%d0 |
| andl #0xFF00FF,%d0 |clear all but accrued exceptions |
| movel %d0,USER_FPSR(%a6) |
| fmovel #0,%FPSR |clear all user bits |
| fmovel #0,%FPCR |clear all user exceptions for FPSP |
| |
| clrb UFLG_TMP(%a6) |clr flag for unsupp data |
| |
| bsrl get_op |go get operand(s) |
| clrb STORE_FLG(%a6) |
| bsrl do_func |do the function |
| fsave -(%a7) |capture possible exc state |
| tstb STORE_FLG(%a6) |
| bnes no_store |if STORE_FLG is set, no store |
| bsrl sto_res |store the result in user space |
| no_store: |
| bral gen_except |post any exceptions and return |
| |
| |end |