folkert/simh-testsetgenerator
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

VAX: Provide support for MTPR/MFPR opcodes to set V & C condition codes

Browse source
This commit is contained in:
Bob Supnik 2019-04-13 12:49:43 -07:00 • committed by Mark Pizzolato
parent e7787c8db5
commit 2f0db74483
1 changed files with 7 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
VAX/vax_cpu.c
View file

@ -253,6 +253,7 @@ int32 in_ie = 0; /* in exc, int */
int32 recq[6]; /* recovery queue */
int32 recqptr; /* recq pointer */
int32 hlt_pin = 0; /* HLT pin intr */
int32 mxpr_cc_vc = 0; /* cc V & C bits from mtpr/mfpr operations */
int32 mem_err = 0;
int32 crd_err = 0;
int32 p1 = 0, p2 = 0; /* fault parameters */
@ -3068,14 +3069,18 @@ for ( ;; ) {
break;
case MTPR:
cc = (cc & CC_C) | op_mtpr (opnd);
mxpr_cc_vc = cc & CC_C;
cc = op_mtpr (opnd);
cc = cc | (mxpr_cc_vc & (CC_V|CC_C));
SET_IRQL; /* update intreq */
break;
case MFPR:
mxpr_cc_vc = cc & CC_C;
r = op_mfpr (opnd);
WRITE_L (r);
CC_IIZP_L (r);
CC_IIZZ_L (r);
cc = cc | (mxpr_cc_vc & (CC_V|CC_C));
break;
/* CIS or emulated instructions */