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root/cebix/BasiliskII/src/uae_cpu/fpp.cpp

Comparing BasiliskII/src/uae_cpu/fpp.cpp (file contents):
Revision 1.4 by cebix, 1999-10-28T09:31:41Z vs.
Revision 1.5 by cebix, 1999-10-28T15:33:18Z

#	Line 71 | Line 71
71		#include "memory.h"
72		#include "readcpu.h"
73		#include "newcpu.h"
74	+	#include "main.h"
75
76		#define DEBUG 0
77		#include "debug.h"
#	Line 1234 | Line 1235 | void fsave_opp(uae_u32 opcode)
1235		return;
1236		}
1237
1238	<	// Put 28 byte IDLE frame.
1239	<	// NOTE!!! IDLE frame is only 4 bytes on a 68040!!
1240	<
1241	<	if (incr < 0) {
1242	<	D(bug("fsave_opp pre-decrement\r\n"));
1243	<	ad -= 4;
1244	<	// What's this? Some BIU flags, or (incorrectly placed) command/condition?
1245	<	put_long (ad, 0x70000000);
1245	<	for (i = 0; i < 5; i++) {
1246	<	ad -= 4;
1247	<	put_long (ad, 0x00000000);
1248	<	}
1249	<	ad -= 4;
1250	<	put_long (ad, 0x1f180000); // IDLE, vers 1f
1251	<	} else {
1252	<	put_long (ad, 0x1f180000); // IDLE, vers 1f
1253	<	ad += 4;
1254	<	for (i = 0; i < 5; i++) {
1255	<	put_long (ad, 0x00000000);
1256	<	ad += 4;
1238	>	if (CPUType == 4) {
1239	>	// Put 4 byte 68040 IDLE frame.
1240	>	if (incr < 0) {
1241	>	ad -= 4;
1242	>	put_long (ad, 0x41000000);
1243	>	} else {
1244	>	put_long (ad, 0x41000000);
1245	>	ad += 4;
1246		}
1247	<	// What's this? Some BIU flags, or (incorrectly placed) command/condition?
1248	<	put_long (ad, 0x70000000);
1249	<	ad += 4;
1250	<	}
1247	>	} else {
1248	>	// Put 28 byte 68881 IDLE frame.
1249	>	if (incr < 0) {
1250	>	D(bug("fsave_opp pre-decrement\r\n"));
1251	>	ad -= 4;
1252	>	// What's this? Some BIU flags, or (incorrectly placed) command/condition?
1253	>	put_long (ad, 0x70000000);
1254	>	for (i = 0; i < 5; i++) {
1255	>	ad -= 4;
1256	>	put_long (ad, 0x00000000);
1257	>	}
1258	>	ad -= 4;
1259	>	put_long (ad, 0x1f180000); // IDLE, vers 1f
1260	>	} else {
1261	>	put_long (ad, 0x1f180000); // IDLE, vers 1f
1262	>	ad += 4;
1263	>	for (i = 0; i < 5; i++) {
1264	>	put_long (ad, 0x00000000);
1265	>	ad += 4;
1266	>	}
1267	>	// What's this? Some BIU flags, or (incorrectly placed) command/condition?
1268	>	put_long (ad, 0x70000000);
1269	>	ad += 4;
1270	>	}
1271	>	}
1272		if ((opcode & 0x38) == 0x18) {
1273		m68k_areg (regs, opcode & 7) = ad; // Never executed on a 68881
1274		D(bug("PROBLEM: fsave_opp post-increment\r\n"));
#	Line 1269 | Line 1279 | void fsave_opp(uae_u32 opcode)
1279		}
1280		}
1281
1282	<	// FSAVE has no pre-decrement
1282	>	// FRESTORE has no pre-decrement
1283		void frestore_opp(uae_u32 opcode)
1284		{
1285		uae_u32 ad;
#	Line 1284 | Line 1294 | void frestore_opp(uae_u32 opcode)
1294		return;
1295		}
1296
1297	<	if (incr < 0) {
1298	<
1299	<	D(bug("PROBLEM: frestore_opp incr < 0\r\n"));
1300	<
1301	<	// this may be wrong, but it's never called.
1302	<	ad -= 4;
1303	<	d = get_long (ad);
1304	<	if ((d & 0xff000000) != 0) {
1305	<	if ((d & 0x00ff0000) == 0x00180000)
1306	<	ad -= 6 * 4;
1307	<	else if ((d & 0x00ff0000) == 0x00380000)
1308	<	ad -= 14 * 4;
1309	<	else if ((d & 0x00ff0000) == 0x00b40000)
1310	<	ad -= 45 * 4;
1297	>	if (CPUType == 4) {
1298	>	// 68040
1299	>	if (incr < 0) {
1300	>	D(bug("PROBLEM: frestore_opp incr < 0\r\n"));
1301	>	// this may be wrong, but it's never called.
1302	>	ad -= 4;
1303	>	d = get_long (ad);
1304	>	if ((d & 0xff000000) != 0) { // Not a NULL frame?
1305	>	if ((d & 0x00ff0000) == 0) { // IDLE
1306	>	D(bug("frestore_opp found IDLE frame at %X\r\n",ad-4));
1307	>	} else if ((d & 0x00ff0000) == 0x00300000) { // UNIMP
1308	>	D(bug("PROBLEM: frestore_opp found UNIMP frame at %X\r\n",ad-4));
1309	>	ad -= 44;
1310	>	} else if ((d & 0x00ff0000) == 0x00600000) { // BUSY
1311	>	D(bug("PROBLEM: frestore_opp found BUSY frame at %X\r\n",ad-4));
1312	>	ad -= 92;
1313	>	}
1314	>	}
1315	>	} else {
1316	>	d = get_long (ad);
1317	>	D(bug("frestore_opp frame at %X = %X\r\n",ad,d));
1318	>	ad += 4;
1319	>	if ((d & 0xff000000) != 0) { // Not a NULL frame?
1320	>	if ((d & 0x00ff0000) == 0) { // IDLE
1321	>	D(bug("frestore_opp found IDLE frame at %X\r\n",ad-4));
1322	>	} else if ((d & 0x00ff0000) == 0x00300000) { // UNIMP
1323	>	D(bug("PROBLEM: frestore_opp found UNIMP frame at %X\r\n",ad-4));
1324	>	ad += 44;
1325	>	} else if ((d & 0x00ff0000) == 0x00600000) { // BUSY
1326	>	D(bug("PROBLEM: frestore_opp found BUSY frame at %X\r\n",ad-4));
1327	>	ad += 92;
1328	>	}
1329	>	}
1330		}
1331	<	} else {
1332	<	d = get_long (ad);
1333	<
1334	<	D(bug("frestore_opp frame at %X = %X\r\n",ad,d));
1335	<
1336	<	ad += 4;
1337	<	if ((d & 0xff000000) != 0) { // Not a NULL frame?
1338	<	if ((d & 0x00ff0000) == 0x00180000) { // IDLE
1339	<	D(bug("frestore_opp found IDLE frame at %X\r\n",ad-4));
1340	<	ad += 6 * 4;
1341	<	} else if ((d & 0x00ff0000) == 0x00380000) {// UNIMP? shouldn't it be 3C?
1342	<	ad += 14 * 4;
1343	<	D(bug("PROBLEM: frestore_opp found UNIMP? frame at %X\r\n",ad-4));
1344	<	} else if ((d & 0x00ff0000) == 0x00b40000) {// BUSY
1345	<	D(bug("PROBLEM: frestore_opp found BUSY frame at %X\r\n",ad-4));
1346	<	ad += 45 * 4;
1331	>	} else {
1332	>	// 68881
1333	>	if (incr < 0) {
1334	>	D(bug("PROBLEM: frestore_opp incr < 0\r\n"));
1335	>	// this may be wrong, but it's never called.
1336	>	ad -= 4;
1337	>	d = get_long (ad);
1338	>	if ((d & 0xff000000) != 0) {
1339	>	if ((d & 0x00ff0000) == 0x00180000)
1340	>	ad -= 6 * 4;
1341	>	else if ((d & 0x00ff0000) == 0x00380000)
1342	>	ad -= 14 * 4;
1343	>	else if ((d & 0x00ff0000) == 0x00b40000)
1344	>	ad -= 45 * 4;
1345	>	}
1346	>	} else {
1347	>	d = get_long (ad);
1348	>	D(bug("frestore_opp frame at %X = %X\r\n",ad,d));
1349	>	ad += 4;
1350	>	if ((d & 0xff000000) != 0) { // Not a NULL frame?
1351	>	if ((d & 0x00ff0000) == 0x00180000) { // IDLE
1352	>	D(bug("frestore_opp found IDLE frame at %X\r\n",ad-4));
1353	>	ad += 6 * 4;
1354	>	} else if ((d & 0x00ff0000) == 0x00380000) {// UNIMP? shouldn't it be 3C?
1355	>	ad += 14 * 4;
1356	>	D(bug("PROBLEM: frestore_opp found UNIMP? frame at %X\r\n",ad-4));
1357	>	} else if ((d & 0x00ff0000) == 0x00b40000) {// BUSY
1358	>	D(bug("PROBLEM: frestore_opp found BUSY frame at %X\r\n",ad-4));
1359	>	ad += 45 * 4;
1360	>	}
1361		}
1362		}
1363		}

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