Commit graph

7 commits

Author SHA1 Message Date
Randy Heit
5d2cbf4ecb Improve disassembly of branch instructions
- I kept getting confused trying to read these instructions, so now their
  disassembly looks more MIPS-like:
  * All mnemonics have had 'b' prepended to them for "branch".
  * The CMP_CHECK bit alters the displayed mnemonic for the inverted
    versions. e.g. BEQ can be displayed as BNE.
  * The following JMP instruction that encodes the branch destination has
    been folded into the disassembly of the branch instruction. Unlike
    MIPS, I chose to display it offset from the branch check with =>
    instead of another comma.
2015-03-13 23:26:33 -05:00
Randy Heit
3ea0d1b444 Add VM opcodes NOP, LANG, and SANG
- To simplify code generation genericizing, add three new opcodes
  * NOP: No-Operation
  * LANG: Load Angle - load a BAM angle into a float reg as degrees
  * SANG: Save Angle - store a float reg into a BEM angle, converting from degrees
2013-08-23 21:46:40 -05:00
Randy Heit
6e88529324 - Added a RETI instruction for returning 15-bit signed immediate values.
- Changed Actor's Damage property into an actual function. All access to the damage property
  must now be done through GetMissileDamage. actor->GetMissileDamage(0, 1) is equivalent
  to the former actor->Damage, for the case where actor->Damage was not an expression. (I
  suppose I will probably need to make a thunk for DECORATE expressions that want to read it.)
- Cleaned up some decorate expression evaluation functions that are no longer used.

SVN r3919 (scripting)
2012-10-28 04:36:52 +00:00
Randy Heit
e1a2f3b546 - Added the TAIL instruction to perform a CALL and a RET in the same instruction. The called
function will pass its results directly to this function's caller. Eventually, this should
  be changed to do a proper tail call for scripted functions.

SVN r3769 (scripting)
2012-07-17 04:06:28 +00:00
Randy Heit
126c738116 - Added PARAMI for the common case of passing an integer constant to a function.
- Made FxParameter::Emit free its operand's register.

SVN r1918 (scripting)
2009-10-15 21:59:37 +00:00
Randy Heit
3001708d16 - Added some code for generating VM code from FxExpressions. This is completely untested, since
it isn't even used anywhere yet. In retrospect, I probably should have targeted an intermediate
  representation and done codegen with that instead, since that would be something I can reuse.

SVN r1908 (scripting)
2009-10-11 00:02:14 +00:00
Randy Heit
92766165f5 OMG! Wrong directory!
SVN r1844 (scripting)
2009-09-16 03:01:40 +00:00
Renamed from zscript/vmops.h (Browse further)