a2d/macros.inc
2018-02-10 00:00:42 -08:00

318 lines
8.6 KiB
PHP

;;; ==================================================
;;; Generic Macros
;;; ==================================================
.define is_immediate(arg) (.match (.mid (0, 1, {arg}), #))
.define is_register(arg) (.match ({arg}, x) .or .match ({arg}, y))
.define immediate_value(arg) (.right (.tcount ({arg})-1, {arg}))
;;; ==================================================
;;; Pad with zeros to the given address
.macro PAD_TO addr
.res addr - *, 0
.endmacro
;;; ==================================================
;;; Calls with one parameter (address in A,X)
.macro addr_call target, addr
lda #<addr
ldx #>addr
jsr target
.endmacro
.macro addr_call_indirect target, addr
lda addr
ldx addr+1
jsr target
.endmacro
.macro addr_jump target, addr
lda #<addr
ldx #>addr
jmp target
.endmacro
;;; ==================================================
;;; Calls with two paramters (call # in y, address in A,X)
;;; (various output orders to match original binary)
.macro axy_call target, yparam, addr
lda #<addr
ldx #>addr
ldy #yparam
jsr target
.endmacro
.macro yax_call target, yparam, addr
ldy #yparam
lda #<addr
ldx #>addr
jsr target
.endmacro
.macro yxa_call target, yparam, addr
ldy #yparam
ldx #>addr
lda #<addr
jsr target
.endmacro
.macro yxa_jump target, yparam, addr
ldy #yparam
ldx #>addr
lda #<addr
jmp target
.endmacro
;;; ==================================================
;;; 16-bit pseudo-ops
;;; Load A,X
;;; ldax #$1234 ; immediate
;;; ldax $1234 ; absolute
.macro ldax arg
.if is_immediate {arg}
lda #<immediate_value {arg}
ldx #>immediate_value {arg}
.else
lda arg
ldx arg+1
.endif
.endmacro
;;; Load X,Y
;;; ldxy #$1234 ; immediate
;;; ldxy $1234 ; absolute
.macro ldxy arg
.if is_immediate {arg}
ldx #<immediate_value {arg}
ldy #>immediate_value {arg}
.else
ldx arg
ldy arg+1
.endif
.endmacro
;;; Store A,X
;;; stax $1234 ; absolute
.macro stax arg
sta arg
stx arg+1
.endmacro
;;; Add arg1 to arg2, store to arg3
;;; add16 $1111, $2222, $3333 ; absolute, absolute, absolute
;;; add16 $1111, #$2222, $3333 ; absolute, immediate, absolute
;;; add16 $1111,x, $2222, $3333 ; indexed, absolute, absolute
;;; add16 $1111,y, $2222, $3333 ; indexed, absolute, absolute
;;; add16 $1111, $2222,x, $3333 ; absolute, indexed, absolute
;;; add16 $1111, $2222,y, $3333 ; absolute, indexed, absolute
;;; add16 $1111, $2222, $3333,x ; absolute, absolute, indexed
;;; add16 $1111, $2222, $3333,y ; absolute, absolute, indexed
.macro add16 arg1, arg2, arg3, arg4
.if is_register {arg2}
lda arg1,arg2
clc
adc arg3
sta arg4
lda arg1+1,arg2
adc arg3+1
sta arg4+1
.elseif is_register {arg3}
lda arg1
clc
adc arg2,arg3
sta arg4
lda arg1+1
adc arg2+1,arg3
sta arg4+1
.elseif is_register {arg4}
lda arg1
clc
adc arg2
sta arg3,arg4
lda arg1+1
adc arg2+1
sta arg3+1,arg4
.elseif is_immediate {arg2}
lda arg1
clc
adc #<immediate_value {arg2}
sta arg3
lda arg1+1
adc #>immediate_value {arg2}
sta arg3+1
.else
lda arg1
clc
adc arg2
sta arg3
lda arg1+1
adc arg2+1
sta arg3+1
.endif
.endmacro
;;; Add arg1 (absolute) to arg2 (8-bit absolute), store to arg3
;;; add16_8 $1111, #$22, $3333 ; absolute, immediate, absolute
;;; add16_8 $1111, $22, $3333 ; absolute, absolute, absolute
.macro add16_8 arg1, arg2, arg3
lda arg1
clc
adc arg2
sta arg3
lda arg1+1
adc #0
sta arg3+1
.endmacro
;;; Subtract arg2 from arg1, store to arg3
;;; sub16 #$1111, $2222, $3333 ; immediate, absolute, absolute
;;; sub16 $1111, #$2222, $3333 ; absolute, immediate, absolute
;;; sub16 $1111, $2222, $3333 ; absolute, absolute, absolute
;;; sub16 $1111, $2222,x, $3333 ; absolute, indexed, absolute
;;; sub16 $1111, $2222,y, $3333 ; absolute, indexed, absolute
;;; sub16 $1111, $2222, $3333,x ; absolute, absolute, indexed
;;; sub16 $1111, $2222, $3333,y ; absolute, absolute, indexed
.macro sub16 arg1, arg2, arg3, arg4
.if is_register {arg3}
lda arg1
sec
sbc arg2,arg3
sta arg4
lda arg1+1
sbc arg2+1,arg3
sta arg4+1
.elseif is_register {arg4}
lda arg1
sec
sbc arg2
sta arg3,arg4
lda arg1+1
sbc arg2+1
sta arg3+1,arg4
.elseif is_immediate {arg1}
lda #<immediate_value {arg1}
sec
sbc arg2
sta arg3
lda #>immediate_value {arg1}
sbc arg2+1
sta arg3+1
.elseif is_immediate {arg2}
lda arg1
sec
sbc #<immediate_value {arg2}
sta arg3
lda arg1+1
sbc #>immediate_value {arg2}
sta arg3+1
.else
lda arg1
sec
sbc arg2
sta arg3
lda arg1+1
sbc arg2+1
sta arg3+1
.endif
.endmacro
;;; Subtract arg2 from arg1, store to arg3
;;; sub16_8 $1111, #$22, $3333 ; absolute, immediate, absolute
;;; sub16_8 $1111, $22, $3333 ; absolute, absolute, absolute
.macro sub16_8 arg1, arg2, arg3
lda arg1
sec
sbc arg2
sta arg3
lda arg1+1
sbc #0
sta arg3+1
.endmacro
;;; Copy 16-bit value
;;; copy16 #$1111, $2222 ; immediate, absolute
;;; copy16 $1111, $2222 ; absolute, absolute
;;; copy16 $1111,x, $2222 ; indirect load, absolute store
;;; copy16 $1111,y, $2222 ; indirect load, absolute store
;;; copy16 $1111, $2222,x ; absolute load, indirect store
;;; copy16 $1111, $2222,y ; absolute load, indirect store
.macro copy16 arg1, arg2, arg3
.if is_register {arg2}
;; indexed load variant (arg2 is x or y)
lda arg1,arg2
sta arg3
lda arg1+1,arg2
sta arg3+1
.elseif is_register {arg3}
;; indexed store variant (arg3 is x or y)
lda arg1
sta arg2,arg3
lda arg1+1
sta arg2+1,arg3
.elseif is_immediate {arg1}
;; immediate load variant (arg1 is #nnnn)
lda #<immediate_value {arg1}
sta arg2
lda #>immediate_value {arg1}
sta arg2+1
.else
lda arg1
sta arg2
lda arg1+1
sta arg2+1
.endif
.endmacro
;;; Compare 16-bit values
;;; cmp16 #$1111, $2222 ; immediate, absolute
;;; cmp16 $1111, #$2222 ; absolute, immediate
;;; cmp16 $1111, $2222 ; absolute, absolute
;;; cmp16 $1111,x, $2222 ; indirect, absolute
;;; cmp16 $1111,y, $2222 ; indirect, absolute
;;; cmp16 $1111, $2222,x ; absolute, indirect
;;; cmp16 $1111, $2222,y ; absolute indirect
.macro cmp16 arg1, arg2, arg3
.if is_register {arg2}
;; indexed variant (arg2 is x or y)
lda arg1,arg2
cmp arg3
lda arg1+1,arg2
sbc arg3+1
.elseif is_register {arg3}
;; indexed variant (arg3 is x or y)
lda arg1
cmp arg2,arg3
lda arg1+1
sbc arg2+1,arg3
.elseif is_immediate {arg1}
;; immediate variant (arg1 is #nnnn)
lda #<immediate_value {arg1}
cmp arg2
lda #>immediate_value {arg1}
sbc arg2+1
.elseif is_immediate {arg2}
;; immediate variant (arg2 is #nnnn)
lda arg1
cmp #<immediate_value {arg2}
lda arg1+1
sbc #>immediate_value {arg2}
.else
lda arg1
cmp arg2
lda arg1+1
sbc arg2+1
.endif
.endmacro
;;; Shift 16-bit values
;;; lsr16 $1111 ; absolute
.macro lsr16 arg1
lsr arg1+1
ror arg1
.endmacro