mirror of
https://github.com/OpenMW/openmw.git
synced 2025-10-25 08:56:37 +00:00
124 lines
5.8 KiB
Text
124 lines
5.8 KiB
Text
Note: a word is considered to be 32 bit long.
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Header (4 words):
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word: number of words in code block
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word: number of words in integer literal block
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word: number of words in float literal block
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word: number of words in string literal block
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Body (variable length):
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code block
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integer literal block (contains a collection of 1 word long integers)
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float literal block (contains a collection of 1 word long floating point numbers)
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string literal block (contains a collection of strings of variable length, word-padded)
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Code bit-patterns:
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3322222222221111111111
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10987654321098765432109876543210
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00ccccccAAAAAAAAAAAAAAAAAAAAAAAA segment 0: 64 opcodes, 1 24-bit argument
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01ccccccAAAAAAAAAAAABBBBBBBBBBBB segment 1: 64 opcodes, 2 12-bit arguments
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10ccccccccccAAAAAAAAAAAAAAAAAAAA segment 2: 1024 opcodes, 1 20-bit argument
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110000ccccccccccccccccccAAAAAAAA segment 3: 262144 opcodes, 1 8-bit argument
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110001ccccccccccAAAAAAAABBBBBBBB segment 4: 1024 opcodes, 2 8-bit arguments
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110010cccccccccccccccccccccccccc segment 5: 67108864 opcodes, no arguments
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other bit-patterns reserved
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legent:
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c: code
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A: argument 0
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B: argument 1
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Segment 0:
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op 0: push arg0
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op 1: move pc ahead by arg0
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op 2: move pc back by arg0
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opcodes 3-31 unused
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opcodes 32-63 reserved for extensions
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Segment 1:
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opcodes 0-31 unused
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opcodes 32-63 reserved for extensions
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Segment 2:
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opcodes 0-511 unused
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opcodes 512-1023 reserved for extensions
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Segment 3:
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op 0: show message box with message string literal index in stack[0];
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buttons (if any) in stack[arg0]..stack[1];
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additional arguments (if any) in stack[arg0+n]..stack[arg0+1];
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n is determined according to the message string
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all arguments are removed from stack
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opcodes 1-131071 unused
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opcodes 131072-262143 reserved for extensions
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Segment 4:
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opcodes 0-511 unused
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opcodes 512-1023 reserved for extensions
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Segment 5:
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op 0: store stack[0] in local short stack[1] and pop twice
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op 1: store stack[0] in local long stack[1] and pop twice
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op 2: store stack[0] in local float stack[1] and pop twice
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op 3: convert stack[0] from integer to float
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op 4: replace stack[0] with integer literal index stack[0]
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op 5: replace stack[0] with float literal index stack[0]
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op 6: convert stack[0] from float to integer
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op 7: invert sign of int value stack[0]
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op 8: invert sign of float value stack[0]
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op 9: add (integer) stack[0] to stack[1], pop twice, push result
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op 10: add (float) stack[0] to stack[1], pop twice, push result
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op 11: sub (integer) stack[1] from stack[0], pop twice, push result
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op 12: sub (float) stack[1] from stack[0], pop twice, push result
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op 13: mul (integer) stack[0] with stack[1], pop twice, push result
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op 14: mul (float) stack[0] with stack[1], pop twice, push result
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op 15: div (integer) stack[1] by stack[0], pop twice, push result
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op 16: div (float) stack[1] by stack[0], pop twice, push result
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op 17: convert stack[1] from integer to float
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op 18: convert stack[1] from float to integer
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opcode 19 unused
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op 20: return
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op 21: replace stack[0] with local short stack[0]
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op 22: replace stack[0] with local long stack[0]
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op 23: replace stack[0] with local float stack[0]
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op 24: skip next instruction if stack[0]==0; pop
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op 25: skip next instruction if stack[0]!=0; pop
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op 26: compare (intger) stack[1] with stack[0]; pop twice; push 1 if equal, 0 else
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op 27: compare (intger) stack[1] with stack[0]; pop twice; push 1 if no equal, 0 else
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op 28: compare (intger) stack[1] with stack[0]; pop twice; push 1 if lesser than, 0 else
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op 29: compare (intger) stack[1] with stack[0]; pop twice; push 1 if lesser or equal, 0 else
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op 30: compare (intger) stack[1] with stack[0]; pop twice; push 1 if greater than, 0 else
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op 31: compare (intger) stack[1] with stack[0]; pop twice; push 1 if greater or equal, 0 else
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op 32: compare (float) stack[1] with stack[0]; pop twice; push 1 if equal, 0 else
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op 33: compare (float) stack[1] with stack[0]; pop twice; push 1 if no equal, 0 else
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op 34: compare (float) stack[1] with stack[0]; pop twice; push 1 if lesser than, 0 else
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op 35: compare (float) stack[1] with stack[0]; pop twice; push 1 if lesser or equal, 0 else
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op 36: compare (float) stack[1] with stack[0]; pop twice; push 1 if greater than, 0 else
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op 37: compare (float) stack[1] with stack[0]; pop twice; push 1 if greater or equal, 0 else
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opcode 38 unused
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op 39: store stack[0] in global short stack[1] and pop twice
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op 40: store stack[0] in global long stack[1] and pop twice
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op 41: store stack[0] in global float stack[1] and pop twice
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op 42: replace stack[0] with global short stack[0]
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op 43: replace stack[0] with global long stack[0]
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op 44: replace stack[0] with global float stack[0]
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opcodes 45-57 unused
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op 58: report string literal index in stack[0];
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additional arguments (if any) in stack[n]..stack[1];
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n is determined according to the message string
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all arguments are removed from stack
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op 59: store stack[0] in member short stack[2] of object with ID stack[1]
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op 60: store stack[0] in member long stack[2] of object with ID stack[1]
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op 61: store stack[0] in member float stack[2] of object with ID stack[1]
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op 62: replace stack[0] with member short stack[1] of object with ID stack[0]
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op 63: replace stack[0] with member short stack[1] of object with ID stack[0]
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op 64: replace stack[0] with member short stack[1] of object with ID stack[0]
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op 65: store stack[0] in member short stack[2] of global script with ID stack[1]
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op 66: store stack[0] in member long stack[2] of global script with ID stack[1]
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op 67: store stack[0] in member float stack[2] of global script with ID stack[1]
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op 68: replace stack[0] with member short stack[1] of global script with ID stack[0]
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op 69: replace stack[0] with member short stack[1] of global script with ID stack[0]
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op 70: replace stack[0] with member short stack[1] of global script with ID stack[0]
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opcodes 71-33554431 unused
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opcodes 33554432-67108863 reserved for extensions
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