764 lines
14 KiB
C
764 lines
14 KiB
C
/*
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* Sources of the "MISCELLANEOUS" group instructions
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*/
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/* $Header$ */
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#include <em_abs.h>
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#include "logging.h"
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#include "global.h"
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#include "log.h"
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#include "trap.h"
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#include "warn.h"
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#include "mem.h"
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#include "memdirect.h"
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#include "shadow.h"
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#include "text.h"
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#include "read.h"
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#include "fra.h"
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#include "rsb.h"
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#include "linfil.h"
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extern int running; /* from main.c */
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/* Two useful but unofficial registers */
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long LIN;
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ptr FIL;
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PRIVATE index_jump(), range_check(), search_jump();
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PRIVATE gto();
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#define asp(l) newSP(SP + arg_f(l))
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DoASPl2(arg)
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long arg;
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{
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/* ASP f: Adjust the stack pointer by f */
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register long l = (L_arg_2() * arg);
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LOG(("@M6 DoASPl2(%ld)", l));
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asp(l);
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}
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DoASPl4(arg)
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long arg;
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{
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/* ASP f: Adjust the stack pointer by f */
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register long l = (L_arg_4() * arg);
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LOG(("@M6 DoASPl4(%ld)", l));
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asp(l);
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}
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DoASPm(arg)
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long arg;
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{
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/* ASP f: Adjust the stack pointer by f */
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register long l = arg;
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LOG(("@M6 DoASPm(%ld)", l));
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asp(l);
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}
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DoASPs(hob, wfac)
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long hob;
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size wfac;
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{
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/* ASP f: Adjust the stack pointer by f */
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register long l = (S_arg(hob) * wfac);
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LOG(("@M6 DoASPs(%ld)", l));
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asp(l);
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}
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DoASSl2(arg)
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size arg;
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{
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/* ASS w: Adjust the stack pointer by w-byte integer */
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register size l = (L_arg_2() * arg);
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LOG(("@M6 DoASSl2(%ld)", l));
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spoilFRA();
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l = spop(arg_wi(l));
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asp(l);
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}
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DoASSz()
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{
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/* ASS w: Adjust the stack pointer by w-byte integer */
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register size l = uwpop();
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LOG(("@M6 DoASSz(%ld)", l));
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spoilFRA();
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l = spop(arg_wi(l));
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asp(l);
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}
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#define block_move(a1,a2,n) \
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if (in_stack(a1)) { \
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if (in_stack(a2)) st_mvs(a1, a2, n); \
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else st_mvd(a1, a2, n); } \
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else { if (in_stack(a2)) dt_mvs(a1, a2, n); \
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else dt_mvd(a1, a2, n); }
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DoBLMl2(arg)
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size arg;
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{
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/* BLM z: Block move z bytes; first pop destination addr, then source addr */
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register size l = (L_arg_2() * arg);
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register ptr dp1, dp2; /* Destination Pointers */
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LOG(("@M6 DoBLMl2(%ld)", l));
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spoilFRA();
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dp1 = dppop();
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dp2 = dppop();
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block_move(dp1, dp2, arg_z(l));
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}
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DoBLMl4(arg)
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size arg;
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{
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/* BLM z: Block move z bytes; first pop destination addr, then source addr */
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register size l = (L_arg_4() * arg);
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register ptr dp1, dp2; /* Destination Pointer */
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LOG(("@M6 DoBLMl4(%ld)", l));
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spoilFRA();
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dp1 = dppop();
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dp2 = dppop();
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block_move(dp1, dp2, arg_z(l));
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}
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DoBLMs(hob, wfac)
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long hob;
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size wfac;
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{
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/* BLM z: Block move z bytes; first pop destination addr, then source addr */
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register size l = (S_arg(hob) * wfac);
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register ptr dp1, dp2; /* Destination Pointer */
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LOG(("@M6 DoBLMs(%ld)", l));
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spoilFRA();
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dp1 = dppop();
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dp2 = dppop();
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block_move(dp1, dp2, arg_z(l));
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}
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DoBLSl2(arg)
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size arg;
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{
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/* BLS w: Block move, size is in w-byte integer on top of stack */
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register size l = (L_arg_2() * arg);
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register ptr dp1, dp2;
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LOG(("@M6 DoBLSl2(%ld)", l));
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spoilFRA();
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l = upop(arg_wi(l));
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dp1 = dppop();
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dp2 = dppop();
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block_move(dp1, dp2, arg_z(l));
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}
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DoBLSz()
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{
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/* BLS w: Block move, size is in w-byte integer on top of stack */
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register size l = uwpop();
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register ptr dp1, dp2;
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LOG(("@M6 DoBLSz(%ld)", l));
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spoilFRA();
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l = upop(arg_wi(l));
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dp1 = dppop();
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dp2 = dppop();
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block_move(dp1, dp2, arg_z(l));
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}
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DoCSAl2(arg)
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size arg;
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{
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/* CSA w: Case jump; address of jump table at top of stack */
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register size l = (L_arg_2() * arg);
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LOG(("@M6 DoCSAl2(%ld)", l));
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spoilFRA();
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index_jump(arg_wi(l));
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}
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DoCSAm(arg)
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size arg;
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{
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/* CSA w: Case jump; address of jump table at top of stack */
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LOG(("@M6 DoCSAm(%ld)", arg));
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spoilFRA();
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index_jump(arg_wi(arg));
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}
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DoCSAz()
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{
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/* CSA w: Case jump; address of jump table at top of stack */
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register size l = uwpop();
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LOG(("@M6 DoCSAz(%ld)", l));
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spoilFRA();
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index_jump(arg_wi(l));
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}
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DoCSBl2(arg)
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size arg;
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{
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/* CSB w: Table lookup jump; address of jump table at top of stack */
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register size l = (L_arg_2() * arg);
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LOG(("@M6 DoCSBl2(%ld)", l));
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spoilFRA();
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search_jump(arg_wi(l));
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}
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DoCSBm(arg)
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size arg;
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{
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/* CSB w: Table lookup jump; address of jump table at top of stack */
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LOG(("@M6 DoCSBm(%ld)", arg));
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spoilFRA();
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search_jump(arg_wi(arg));
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}
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DoCSBz()
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{
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/* CSB w: Table lookup jump; address of jump table at top of stack */
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register size l = uwpop();
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LOG(("@M6 DoCSBz(%ld)", l));
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spoilFRA();
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search_jump(arg_wi(l));
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}
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DoDCHz()
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{
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/* DCH -: Follow dynamic chain, convert LB to LB of caller */
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register ptr lb;
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LOG(("@M6 DoDCHz()"));
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spoilFRA();
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lb = dppop();
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if (!is_LB(lb)) {
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wtrap(WDCHBADLB, ESTACK);
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}
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dppush(st_lddp(lb + rsb_LB));
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}
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DoDUPl2(arg)
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size arg;
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{
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/* DUP s: Duplicate top s bytes */
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register size l = (L_arg_2() * arg);
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register ptr oldSP = SP;
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LOG(("@M6 DoDUPl2(%ld)", l));
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spoilFRA();
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st_inc(arg_s(l));
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st_mvs(SP, oldSP, l);
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}
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DoDUPm(arg)
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size arg;
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{
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/* DUP s: Duplicate top s bytes */
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register ptr oldSP = SP;
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LOG(("@M6 DoDUPm(%ld)", arg));
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spoilFRA();
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st_inc(arg_s(arg));
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st_mvs(SP, oldSP, arg);
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}
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DoDUSl2(arg)
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size arg;
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{
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/* DUS w: Duplicate top w bytes */
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register size l = (L_arg_2() * arg);
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register ptr oldSP;
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LOG(("@M6 DoDUSl2(%ld)", l));
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spoilFRA();
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l = upop(arg_wi(l));
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oldSP = SP;
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st_inc(arg_s(l));
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st_mvs(SP, oldSP, l);
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}
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DoDUSz()
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{
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/* DUS w: Duplicate top w bytes */
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register size l = uwpop();
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register ptr oldSP;
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LOG(("@M6 DoDUSz(%ld)", l));
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spoilFRA();
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l = upop(arg_wi(l));
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oldSP = SP;
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st_inc(arg_s(l));
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st_mvs(SP, oldSP, l);
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}
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DoEXGl2(arg)
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size arg;
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{
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/* EXG w: Exchange top w bytes */
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register size l = (L_arg_2() * arg);
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register ptr oldSP = SP;
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LOG(("@M6 DoEXGl2(%ld)", l));
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spoilFRA();
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st_inc(arg_w(l));
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st_mvs(SP, oldSP, l);
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st_mvs(oldSP, oldSP + l, l);
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st_mvs(oldSP + l, SP, l);
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st_dec(l);
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}
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DoEXGs(hob, wfac)
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long hob;
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size wfac;
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{
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/* EXG w: Exchange top w bytes */
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register size l = (S_arg(hob) * wfac);
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register ptr oldSP = SP;
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LOG(("@M6 DoEXGs(%ld)", l));
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spoilFRA();
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st_inc(arg_w(l));
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st_mvs(SP, oldSP, l);
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st_mvs(oldSP, oldSP + l, l);
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st_mvs(oldSP + l, SP, l);
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st_dec(l);
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}
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DoEXGz()
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{
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/* EXG w: Exchange top w bytes */
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register size l = uwpop();
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register ptr oldSP = SP;
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LOG(("@M6 DoEXGz(%ld)", l));
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spoilFRA();
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st_inc(arg_w(l));
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st_mvs(SP, oldSP, l);
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st_mvs(oldSP, oldSP + l, l);
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st_mvs(oldSP + l, SP, l);
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st_dec(l);
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}
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DoFILu(arg)
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long arg;
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{
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/* FIL g: File name (external 4 := g) */
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register ptr p = i2p(U_arg() * arg);
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LOG(("@M6 DoFILu(%lu)", p));
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spoilFRA();
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if (p > HB) {
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wtrap(WILLFIL, EILLINS);
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}
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putFIL(arg_g(p));
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}
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DoFILl4(arg)
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long arg;
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{
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/* FIL g: File name (external 4 := g) */
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register ptr p = i2p(L_arg_4() * arg);
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LOG(("@M6 DoFILl4(%lu)", p));
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spoilFRA();
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if (p > HB) {
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wtrap(WILLFIL, EILLINS);
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}
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putFIL(arg_g(p));
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}
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DoGTOu(arg)
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long arg;
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{
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/* GTO g: Non-local goto, descriptor at g */
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register ptr p = i2p(U_arg() * arg);
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LOG(("@M6 DoGTOu(%lu)", p));
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gto(arg_gto(p));
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}
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DoGTOl4(arg)
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long arg;
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{
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/* GTO g: Non-local goto, descriptor at g */
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register ptr p = i2p(L_arg_4() * arg);
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LOG(("@M6 DoGTOl4(%lu)", p));
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gto(arg_gto(p));
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}
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DoLIMz()
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{
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/* LIM -: Load 16 bit ignore mask */
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LOG(("@M6 DoLIMz()"));
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spoilFRA();
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wpush(IgnMask);
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}
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DoLINl2(arg)
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long arg;
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{
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/* LIN n: Line number (external 0 := n) */
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register unsigned long l = (L_arg_2() * arg);
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LOG(("@M6 DoLINl2(%lu)", l));
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spoilFRA();
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putLIN((long) arg_lin(l));
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}
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DoLINl4(arg)
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long arg;
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{
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/* LIN n: Line number (external 0 := n) */
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register unsigned long l = (L_arg_4() * arg);
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LOG(("@M6 DoLINl4(%lu)", l));
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spoilFRA();
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putLIN((long) arg_lin(l));
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}
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DoLINs(hob, wfac)
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long hob;
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size wfac;
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{
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/* LIN n: Line number (external 0 := n) */
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register unsigned long l = (S_arg(hob) * wfac);
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LOG(("@M6 DoLINs(%lu)", l));
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spoilFRA();
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putLIN((long) arg_lin(l));
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}
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DoLNIz()
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{
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/* LNI -: Line number increment */
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LOG(("@M6 DoLNIz()"));
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spoilFRA();
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putLIN((long)getLIN() + 1);
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}
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DoLORs(hob, wfac)
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long hob;
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size wfac;
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{
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/* LOR r: Load register (0=LB, 1=SP, 2=HP) */
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register long l = (S_arg(hob) * wfac);
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LOG(("@M6 DoLORs(%ld)", l));
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spoilFRA();
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switch ((int) arg_r(l)) {
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case 0:
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dppush(LB);
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break;
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case 1:
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dppush(SP);
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break;
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case 2:
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dppush(HP);
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break;
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}
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}
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DoLPBz()
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{
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/* LPB -: Convert local base to argument base */
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register ptr lb;
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LOG(("@M6 DoLPBz()"));
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spoilFRA();
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lb = dppop();
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if (!is_LB(lb)) {
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wtrap(WLPBBADLB, ESTACK);
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}
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dppush(lb + rsbsize);
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}
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DoMONz()
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{
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/* MON -: Monitor call */
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LOG(("@M6 DoMONz()"));
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spoilFRA();
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moncall();
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}
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DoNOPz()
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{
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/* NOP -: No operation */
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LOG(("@M6 DoNOPz()"));
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spoilFRA();
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message("NOP instruction");
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}
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DoRCKl2(arg)
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size arg;
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{
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/* RCK w: Range check; trap on error */
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register size l = (L_arg_2() * arg);
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LOG(("@M6 DoRCKl2(%ld)", l));
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spoilFRA();
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range_check(arg_wi(l));
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}
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DoRCKm(arg)
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size arg;
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{
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/* RCK w: Range check; trap on error */
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LOG(("@M6 DoRCKm(%ld)", arg));
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spoilFRA();
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range_check(arg_wi(arg));
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}
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DoRCKz()
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{
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/* RCK w: Range check; trap on error */
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register size l = uwpop();
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LOG(("@M6 DoRCKz(%ld)", l));
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spoilFRA();
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range_check(arg_wi(l));
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}
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DoRTTz()
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{
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/* RTT -: Return from trap */
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LOG(("@M6 DoRTTz()"));
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switch (poprsb(1)) {
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case RSB_STP:
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warning(WRTTEMPTY);
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running = 0; /* stop the machine */
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return;
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case RSB_CAL:
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warning(WRTTCALL);
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return;
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case RSB_RTT:
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/* OK */
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break;
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case RSB_NRT:
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warning(WRTTNRTT);
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running = 0; /* stop the machine */
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return;
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default:
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warning(WRTTBAD);
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return;
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}
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/* pop the trap number */
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uwpop();
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/* restore the Function Return Area */
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FRA_def = uwpop();
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FRASize = uwpop();
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popFRA(FRASize);
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}
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DoSIGz()
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{
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/* SIG -: Trap errors to proc identifier on top of stack, \-2 resets default */
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register long tpi = spop(psize);
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LOG(("@M6 DoSIGz()"));
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spoilFRA();
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npush(TrapPI, psize);
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if (tpi == -2) {
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OnTrap = TR_HALT;
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TrapPI = 0;
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}
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else {
|
|
tpi = arg_p(tpi); /* do not test earlier! */
|
|
OnTrap = TR_TRAP;
|
|
TrapPI = tpi;
|
|
}
|
|
}
|
|
|
|
DoSIMz()
|
|
{
|
|
/* SIM -: Store 16 bit ignore mask */
|
|
LOG(("@M6 DoSIMz()"));
|
|
spoilFRA();
|
|
IgnMask = (uwpop() | PreIgnMask) & MASK2;
|
|
}
|
|
|
|
DoSTRs(hob, wfac)
|
|
long hob;
|
|
size wfac;
|
|
{
|
|
/* STR r: Store register (0=LB, 1=SP, 2=HP) */
|
|
register long l = (S_arg(hob) * wfac);
|
|
|
|
LOG(("@M6 DoSTRs(%ld)", l));
|
|
spoilFRA();
|
|
switch ((int) arg_r(l)) {
|
|
case 0:
|
|
newLB(dppop());
|
|
pop_frames();
|
|
break;
|
|
case 1:
|
|
newSP(dppop());
|
|
break;
|
|
case 2:
|
|
newHP(dppop());
|
|
break;
|
|
}
|
|
}
|
|
|
|
DoTRPz()
|
|
{
|
|
/* TRP -: Cause trap to occur (Error number on stack) */
|
|
register unsigned int tr = (unsigned int)uwpop();
|
|
|
|
LOG(("@M6 DoTRPz()"));
|
|
spoilFRA();
|
|
if (tr > 15 || !(IgnMask&BIT(tr))) {
|
|
wtrap(WTRP, (int)tr);
|
|
}
|
|
}
|
|
|
|
|
|
/* Service routines */
|
|
|
|
PRIVATE gto(p)
|
|
ptr p;
|
|
{
|
|
register ptr old_LB = LB;
|
|
register ptr new_PC = dt_ldip(p);
|
|
register ptr new_SP = dt_lddp(p + psize);
|
|
register ptr new_LB = dt_lddp(p + (2 * psize));
|
|
|
|
while (old_LB < new_LB) {
|
|
PI = st_lds(old_LB + rsb_PI, psize);
|
|
old_LB = st_lddp(old_LB + rsb_LB);
|
|
}
|
|
if (old_LB != new_LB) {
|
|
wtrap(WGTORSB, EBADGTO);
|
|
}
|
|
|
|
newLB(new_LB);
|
|
pop_frames();
|
|
newSP(new_SP);
|
|
newPC(new_PC);
|
|
}
|
|
|
|
/*
|
|
The LIN and FIL routines.
|
|
The values of LIN and FIL are kept in EM machine registers
|
|
(variables LIN and FIL) and in the data space.
|
|
*/
|
|
|
|
putLIN(lin)
|
|
long lin;
|
|
{
|
|
dt_unprot(i2p(LINO_AD), (long)LINSIZE);
|
|
dt_stn(i2p(LINO_AD), lin, (long)LINSIZE);
|
|
LIN = lin;
|
|
dt_prot(i2p(LINO_AD), (long)LINSIZE);
|
|
}
|
|
|
|
putFIL(fil)
|
|
ptr fil;
|
|
{
|
|
dt_unprot(i2p(FILN_AD), psize);
|
|
dt_stdp(i2p(FILN_AD), fil);
|
|
FIL = fil;
|
|
dt_prot(i2p(FILN_AD), psize);
|
|
}
|
|
|
|
/********************************************************
|
|
* Case jump by indexing *
|
|
* *
|
|
* 1. pop case descriptor pointer. *
|
|
* 2. pop table index. *
|
|
* 3. Calculate (table index) - (lower bound). *
|
|
* 4. Check if in range. *
|
|
* 5. If in range: load Program Counter value. *
|
|
* 6. Else: load default value. *
|
|
********************************************************/
|
|
|
|
PRIVATE index_jump(nbytes)
|
|
size nbytes;
|
|
{
|
|
register ptr cdp = dppop(); /* Case Descriptor Pointer */
|
|
register long t_index = /* Table INDEX */
|
|
spop(nbytes) - mem_lds(cdp + psize, nbytes);
|
|
register ptr nPC; /* New Program Counter */
|
|
|
|
if (t_index >= 0 && t_index <= mem_lds(cdp + nbytes + psize, nbytes)) {
|
|
nPC = mem_ldip(cdp + (2 * nbytes) + ((t_index + 1) * psize));
|
|
}
|
|
else if ((nPC = mem_ldip(cdp)) == 0) {
|
|
trap(ECASE);
|
|
}
|
|
newPC(nPC);
|
|
}
|
|
|
|
/********************************************************
|
|
* Case jump by table search *
|
|
* *
|
|
* 1. pop case descriptor pointer. *
|
|
* 2. pop search value. *
|
|
* 3. Load number of table entries. *
|
|
* 4. Check if search value in table. *
|
|
* 5. If found: load Program Counter value. *
|
|
* 6. Else: load default value. *
|
|
********************************************************/
|
|
|
|
PRIVATE search_jump(nbytes)
|
|
size nbytes;
|
|
{
|
|
register ptr cdp = dppop(); /* Case Descriptor Pointer */
|
|
register long sv = spop(nbytes);/* Search Value */
|
|
register long nt = /* Number of Table-entries */
|
|
mem_lds(cdp + psize, nbytes);
|
|
register ptr nPC; /* New Program Counter */
|
|
|
|
while (--nt >= 0) {
|
|
if (sv == mem_lds(cdp + (nt+1) * (nbytes+psize), nbytes)) {
|
|
nPC = mem_ldip(cdp + nbytes + (nt+1)*(nbytes+psize));
|
|
if (nPC == 0)
|
|
trap(ECASE);
|
|
newPC(nPC);
|
|
return;
|
|
}
|
|
}
|
|
nPC = mem_ldip(cdp);
|
|
if (nPC == 0)
|
|
trap(ECASE);
|
|
newPC(nPC);
|
|
}
|
|
|
|
/********************************************************
|
|
* Range check *
|
|
* *
|
|
* 1. Load range descriptor. *
|
|
* 2. Check against lower and upper bound. *
|
|
* 3. Generate trap if necessary. *
|
|
* 4. DON'T remove integer. *
|
|
********************************************************/
|
|
|
|
PRIVATE range_check(nbytes)
|
|
size nbytes;
|
|
{
|
|
register ptr rdp = dppop(); /* Range check Descriptor Pointer */
|
|
register long cv = /* Check Value */
|
|
st_lds(SP, nbytes);
|
|
|
|
if (must_test && !(IgnMask&BIT(ERANGE))) {
|
|
if ( cv < mem_lds(rdp, nbytes)
|
|
|| cv > mem_lds(rdp + nbytes, nbytes)
|
|
) {
|
|
trap(ERANGE);
|
|
}
|
|
}
|
|
}
|