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PDP11: Fix bug in FIS dirty zero check

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Bob Supnik 2023-06-08 00:57:20 -10:00 committed by Mark Pizzolato
parent b2983bd214
commit c65f0ee485
1 changed files with 5 additions and 3 deletions
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8
PDP11/pdp11_fp.c
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@ -1,6 +1,6 @@
/* pdp11_fp.c: PDP-11 floating point simulator (32b version)
Copyright (c) 1993-2018, Robert M Supnik
Copyright (c) 1993-2023, Robert M Supnik
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
@ -23,8 +23,10 @@
used in advertising or otherwise to promote the sale, use or other dealings
in this Software without prior written authorization from Robert M Supnik.
05-Jun-23 RMS Fixed bug in FIS dirty zero check ("Joonio")
10-Dec-22 RMS Fixed bug in FUIV operation (James Fehlinger)
21-Aug-22 RMS Restored MMR1 operation for 11/44, 11/45-70 (Walter Mueller)
28-May-18 RMS Fixed FPCHG macro to avoid undefined operation (Mark Pizzolato)
24-Mar-15 RMS MMR1 does not track register changes (Johnny Billquist)
20-Apr-13 RMS MMR1 does not track PC changes (Johnny Billquist)
22-Sep-05 RMS Fixed declarations (Sterling Garwood)
@ -924,7 +926,7 @@ return;
t_stat fis11 (int32 IR)
{
int32 reg, exta, pa, pa2;
int32 reg, exta, pa, pa2;
fpac_t fac, fsrc;
reg = IR & 07; /* isolate reg */
@ -952,7 +954,7 @@ pa2 = last_pa;
fac.l = 0;
if (GET_SIGN (fsrc.h) && (GET_EXP (fsrc.h) == 0)) /* clean 0's */
fsrc.h = fsrc.l = 0;
if (GET_SIGN (fac.h) && (GET_EXP (fac.l) == 0))
if (GET_SIGN (fac.h) && (GET_EXP (fac.h) == 0))
fac.h = fac.l = 0;
N = Z = V = C = 0; /* clear cc's */