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z80cbopcodes.asm
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z80cbopcodes.asm
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; ********************* (FD/DD) CB opcode macros *********************
z80m_getCBindexoctal macro arg:req
t_prefix = 0
t_octal = @ITEMINLIST (arg, <b,c,d,e,h,l,(hl),a>)
if t_octal eq 0
.err <*** Invalid argument for octal range ***>
endif
t_octal = t_octal -1
exitm %t_octal
endm
z80m_CBopcodeoctalrange macro arg1:req, baseopcode:req
if argtype eq z80type_index_mem
z80m_storebyte argixiy ; fd/dd prefix
z80m_storebyte 0cbh ; cb prefix
z80m_storebyte argval ; index offset
z80m_storebyte baseopcode+6 ; use (hl) variant
z80_PC = z80_PC + 4
exitm
endif
regoctal1 = z80m_getCBindexoctal (arg1)
z80m_storebyte 0cbh ; cb prefix
z80m_storebyte baseopcode + regoctal1
z80_PC = z80_PC + 2
endm
z80_rlc macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 0h
endm
z80_rrc macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 8h
endm
z80_rl macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 10h
endm
z80_rr macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 18h
endm
z80_sla macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 20h
endm
z80_sra macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 28h
endm
z80_sll macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 30h
endm
z80_sls macro arg1:req ; pseudonym for sll
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 30h
endm
z80_srl macro arg1:req
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, 38h
endm
z80_bitsetreset macro bitnum:req, arg1:req, baseopcode:req
if bitnum gt 7
.err <*** Invalid bit number for opcode ***>
endif
z80m_decodearg arg1
z80m_CBopcodeoctalrange arg1, baseopcode + (bitnum * 8)
endm
z80_bit macro bitnum:req, arg1:req
z80_bitsetreset bitnum, arg1, 40h
endm
z80_res macro bitnum:req, arg1:req
z80_bitsetreset bitnum, arg1, 80h
endm
z80_set macro bitnum:req, arg1:req
z80_bitsetreset bitnum, arg1, 0c0h
endm