Commit graph

28 commits

Author SHA1 Message Date
Aleksandar Andrejevic
efcf73c467 [FAST486]
The LDT can be loaded with a NULL descriptor. That invalidates the LDT but doesn't cause
any exception.


svn path=/branches/ntvdm/; revision=61269
2013-12-14 02:30:42 +00:00
Aleksandar Andrejevic
18b844dffa [FAST486]
Fix the emulation of the Local Descriptor Table.


svn path=/branches/ntvdm/; revision=61268
2013-12-14 02:13:01 +00:00
Aleksandar Andrejevic
5303c91efa [FAST486]
Implement the extended opcode group 0x0F, 0x00 (SLDT, STR, LLDT, LTR, VERR, VERW).


svn path=/branches/ntvdm/; revision=61264
2013-12-13 03:32:41 +00:00
Hermès Bélusca-Maïto
a2bd742ecd [FAST486]
- Call Fast486GetCurrentPrivLevel only when needed.
- Fix a type.

svn path=/branches/ntvdm/; revision=61211
2013-12-03 23:51:51 +00:00
Aleksandar Andrejevic
2064d10bad [FAST486]
Check for division by zero, and generate the appropriate exception.


svn path=/branches/ntvdm/; revision=61204
2013-12-03 00:56:47 +00:00
Aleksandar Andrejevic
363543b325 [FAST486]
Fix the calculation of AF in ADC and the calculation of AF and CF in SBB.


svn path=/branches/ntvdm/; revision=61068
2013-11-22 01:22:00 +00:00
Aleksandar Andrejevic
f90a1db2b7 [FAST486]
The top half of EIP is cleared after a 16-bit jump.


svn path=/branches/ntvdm/; revision=61058
2013-11-20 14:21:47 +00:00
Aleksandar Andrejevic
b456a8b355 [FAST486]
Make the parameters to Fast486ReadModrm*Operands optional, so that
unnecessary extra reads aren't performed. This also eliminates the
need for dummy variables.


svn path=/branches/ntvdm/; revision=61055
2013-11-20 08:01:10 +00:00
Hermès Bélusca-Maïto
8998a96d56 [NTVDM] : Implement getMSW and setMSW for getting and setting the Machine Status Word (lower word of CR0).
[FAST486]: MSW = Machine Status Word

svn path=/branches/ntvdm/; revision=61044
2013-11-18 20:25:10 +00:00
Aleksandar Andrejevic
bbc9efd2d9 [FAST486]
- Fix the privilege checks.
- Store the CPL in a special field, so that it doesn't get mixed up
  with the lowest 2 bits of real mode selectors while switching
  into protected mode.
- Reset the exception count after a successful ISR call.
- In Fast486OpcodeGroup0F01, check for prefix overrides after parsing
  the Mod-Reg-R/M, which might add a SS: prefix override in some cases.


svn path=/branches/ntvdm/; revision=60995
2013-11-15 02:32:08 +00:00
Aleksandar Andrejevic
a3513c8f18 [FAST486]
Fix previous fix.


svn path=/branches/ntvdm/; revision=60985
2013-11-13 22:34:38 +00:00
Aleksandar Andrejevic
cd496c8e21 [FAST486]
XADD: Fix the order of operations.
POP <modrm>: The value must be popped from the stack before parsing the
Mod-Reg-R/M, because of the "POP DWORD [ESP]" case.


svn path=/branches/ntvdm/; revision=60984
2013-11-13 22:33:37 +00:00
Aleksandar Andrejevic
ace025dca9 [FAST486]
The bit number should be normalized to [0, DataSize- 1], not [0, 2 ^ DataSize - 1].


svn path=/branches/ntvdm/; revision=60975
2013-11-13 18:14:01 +00:00
Aleksandar Andrejevic
acccaf3a90 [FAST486]
Fix a bug in the ROL and ROR instructions.


svn path=/branches/ntvdm/; revision=60972
2013-11-13 13:32:00 +00:00
Aleksandar Andrejevic
c7de214d81 [FAST486]
Fix several bugs in Fast486RotateOperation.


svn path=/branches/ntvdm/; revision=60969
2013-11-13 02:38:36 +00:00
Aleksandar Andrejevic
677810ea95 [FAST486]
Don't return uninitialized variables.


svn path=/branches/ntvdm/; revision=60967
2013-11-12 21:55:05 +00:00
Aleksandar Andrejevic
2da0e38fbc [FAST486]
In rotate operations, the count is always masked with 0x1F, regardless
of the operand size.


svn path=/branches/ntvdm/; revision=60966
2013-11-12 19:25:50 +00:00
Hermès Bélusca-Maïto
045f939e5c [FAST486]: Remove an extra "return TRUE;"
svn path=/branches/ntvdm/; revision=60931
2013-11-11 01:02:48 +00:00
Aleksandar Andrejevic
fda5745543 [FAST486]
The number of bit places in a shift operation is ANDed by the width of the type
when it is in a register, so (1 << c), when c is 32, is actually 1, and not 0.
Fix the calculation of MaxValue by using SignFlag | (SignFlag - 1) instead.


svn path=/branches/ntvdm/; revision=60912
2013-11-10 03:11:56 +00:00
Hermès Bélusca-Maïto
a106a3b21e [FAST486]: Code formatting only (remove endlines spaces).
svn path=/branches/ntvdm/; revision=60894
2013-11-09 14:23:40 +00:00
Hermès Bélusca-Maïto
92ce0174ac [FAST486]: Code formatting only.
svn path=/branches/ntvdm/; revision=60857
2013-11-03 23:13:53 +00:00
Hermès Bélusca-Maïto
3b6b1a7f37 [FAST486]: Replace (boolean_condition) ? TRUE : FALSE; by: (boolean_condition) .
svn path=/branches/ntvdm/; revision=60856
2013-11-03 22:44:55 +00:00
Aleksandar Andrejevic
6e6e0bac08 [FAST486]
The RCL, RCR, ROL and ROR instructions do not update SF, ZF or PF.


svn path=/branches/ntvdm/; revision=60841
2013-11-03 01:05:40 +00:00
Aleksandar Andrejevic
dcbdbb7d9f [FAST486]
Implement opcode group 0x0F, 0x01 (SGDT, SIDT, LGDT, LIDT, SMSW and LMSW).
Only INVLPG is not implemented yet.


svn path=/branches/ntvdm/; revision=60824
2013-11-01 22:39:43 +00:00
Hermès Bélusca-Maïto
2c8e8ba5d3 [FAST486]
- Remove an unneeded inclusion to the CRT header: limits.h (and use instead NDK definitions for max/min long values).
- Remove unneeded comments...
[NTVDM]
Remove an unneeded add_dependencies(...) command.

svn path=/branches/ntvdm/; revision=60767
2013-10-27 11:42:44 +00:00
Aleksandar Andrejevic
87f5903d48 [FAST486]
Implement extended opcode groups 0xB9 (UD2) and 0xBA (BT/BTS/BTR/BTC).


svn path=/branches/ntvdm/; revision=60745
2013-10-25 18:15:24 +00:00
Aleksandar Andrejevic
1a968e6f61 [FAST486]
Fix more prefix handling.
Create the macros TOGGLE_ADSIZE and TOGGLE_OPSIZE to shorten the code.


svn path=/branches/ntvdm/; revision=60715
2013-10-19 23:43:53 +00:00
Hermès Bélusca-Maïto
51040fc61e Bye bye Soft386, welcome Fast486, courtesy Aleksandar Andrejevic.
[NTVDM]: Define by default NEW_EMULATOR, i.e. use Fast486 instead of softx86.

svn path=/branches/ntvdm/; revision=60703
2013-10-19 16:55:51 +00:00
Renamed from lib/soft386/opgroups.c (Browse further)