added load upper immediate (lui) op code
parent
be640f2540
commit
229a7b73fa
51
assembler.rb
51
assembler.rb
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@ -7,6 +7,7 @@ def zero_fill(pos)
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end
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end
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# TODO: RENAME TO WORD
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def int(i)
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$bytes.push((i & 0x000000ff),
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(i & 0x0000ff00) >> 8,
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@ -42,8 +43,27 @@ def nop
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int 0x00000000
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end
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# load upper immediate
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def lui(reg, val)
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# oooooo ----- ttttt iiiiiiiiiiiiiiii
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op = 0b001111_00000_00000_0000000000000000
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op |= (0b11111 & reg) << 16
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op |= 0xffff & val
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int op
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end
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# this is a terrible idea and im doing it
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#$labels = {}
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#def method_missing(m, *args)
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# puts m.to_s
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# super
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#end
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$base_addr = 0x80010000 # 0x10000 # 0x80010000
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# # # EXE HEADER # # #
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string "PS-X EXE"
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zero_fill 0x00f
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int $base_addr # initial pc
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@ -59,19 +79,44 @@ int 0x00000000 # Initial SP/R29 & FP/R30 Offs
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zero_fill 0x4b # Reserved for A(43h) Function
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# Ascii marker would go here
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zero_fill 0x7ff
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$exe_header = $bytes[0..]
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$bytes = []
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# code
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# # # PROGRAM CODE # # #
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nop
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nop
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jal $base_addr
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nop # nop (is always exec'd bc mips)
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nop
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nop
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nop
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jmp $base_addr
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nop
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lui 2, 1
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# int 0b101011_00010_00001_01111111_11111111
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string "this is a test lol"
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int 0xFFAAFFAA
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int 0b001001_11101_11101_11111111_11111111
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int 0b001000_11101_11101_11111111_11111111
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int 0xAAFFAAFF
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int 0b001001_00101_00101_11111111_11111111
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int 0b001000_00101_00101_11111111_11111111
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zero_fill 0xfff
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f = File.new "LOADTHIS.EXE", "wb"
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f.write $exe_header.pack("C*")
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f.write $bytes.pack("C*")
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f.close
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