1 files changed, 87 insertions, 0 deletions
diff --git a/private/mvdm/softpc.new/base/ccpu386/shr.c b/private/mvdm/softpc.new/base/ccpu386/shr.c
new file mode 100644
index 000000000..43c774d13
--- /dev/null
+++ b/private/mvdm/softpc.new/base/ccpu386/shr.c
@@ -0,0 +1,87 @@
+/*[
+
+shr.c
+
+LOCAL CHAR SccsID[]="@(#)shr.c	1.5 02/09/94";
+
+SHR CPU functions.
+------------------
+
+]*/
+
+
+#include <insignia.h>
+
+#include <host_def.h>
+#include <xt.h>
+#include <c_main.h>
+#include <c_addr.h>
+#include <c_bsic.h>
+#include <c_prot.h>
+#include <c_seg.h>
+#include <c_stack.h>
+#include <c_xcptn.h>
+#include	<c_reg.h>
+#include <shr.h>
+
+/*
+   =====================================================================
+   EXTERNAL FUNCTIONS START HERE.
+   =====================================================================
+ */
+
+
+/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+/* Generic - one size fits all 'shr'.                                 */
+/*~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~*/
+GLOBAL VOID
+SHR
+       	    	    	                    
+IFN3(
+	IU32 *, pop1,	/* pntr to dst/src operand */
+	IU32, op2,	/* shift count operand */
+	IUM8, op_sz	/* 8, 16 or 32-bit */
+    )
+
+
+   {
+   IU32 prelim;
+   IU32 result;
+   ISM32 new_of;
+
+   /* only use lower five bits of count */
+   if ( (op2 &= 0x1f) == 0 )
+      return;
+
+   /*
+	       =================     ====
+	 0 --> | | | | | | | | | --> |CF|
+	       =================     ====
+    */
+   prelim = *pop1 >> op2 - 1;		/* Do all but last shift */
+   SET_CF((prelim & BIT0_MASK) != 0);	/* CF = Bit 0 */
+
+   /* OF = MSB of operand */
+   new_of = (prelim & SZ2MSB(op_sz)) != 0;
+
+   result = prelim >> 1;		/* Do final shift */
+   SET_PF(pf_table[result & BYTE_MASK]);
+   SET_ZF(result == 0);
+   SET_SF(0);
+
+   if ( op2 == 1 )
+      {
+      SET_OF(new_of);
+      }
+   else
+      {
+      do_multiple_shiftrot_of(new_of);
+      }
+
+   /* Set undefined flag(s) */
+#ifdef SET_UNDEFINED_FLAG
+   SET_AF(UNDEFINED_FLAG);
+#endif
+
+   *pop1 = result;		/* Return answer */
+   }