Eine aufbereitete Darstellung der Quelle

 
     
 
 
Anforderungen  |   Konzepte  |   Entwurf  |   Entwicklung  |   Qualitätssicherung  |   Lebenszyklus  |   Steuerung
 
 
 
 
Benutzer

products/Sources/formale Sprachen/C/LibreOffice/icon-themes/sifr/cmd/   (LibreOffice Version 25.8.3.2©)  Datei vom 5.10.2025 mit Größe 447 B image not shown  

Bilddatei

x_unimp.S


products/Sources/formale Sprachen/C/Linux/arch/m68k/fpsp040/x_unimp.S

| | 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 | | For details on the license for this file, please see the | file, README, in this same directory. 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

                                                                                                                                                                                                                                                                                                                                                                                                     

Neuigkeiten

     Aktuelles
     Motto des Tages

Open Source Software

     Quellcodebibliothek
     Eigene Quellcodes
     Fremde Quellcodes
     Suchen
Jenseits des Üblichen ....
    

Besucherstatistik

Besucherstatistik
Statistik
#Sources=1126864
#Domains=1897691