a2d/macros.inc
Joshua Bell a285a7413b PARAM_BLOCK macro: Save/Restore org manually
The `.feature org_per_seg` approach worked, but listing files had
incorrect addresses following the end of the segment. Manually
stash and restore the org at the end of the block.

Also, add in a dec16.
2018-04-23 08:20:18 -07:00

487 lines
14 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}))
.macro _op_lo op, arg
.if _is_immediate {arg}
op #<_immediate_value {arg}
.else
op arg
.endif
.endmacro
.macro _op_hi op, arg
.if _is_immediate {arg}
op #>_immediate_value {arg}
.else
op arg+1
.endif
.endmacro
;;; ============================================================
;;; Pad with zeros to the given address
.macro PAD_TO addr
.res addr - *, 0
.endmacro
;;; ============================================================
;;; Common patterns
.define AS_WORD(arg) arg & $FFFF
.macro return arg
lda arg
rts
.endmacro
.macro copy arg1, arg2
lda arg1
sta arg2
.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
_op_lo lda, {arg}
_op_hi ldx, {arg}
.endmacro
;;; Load A,Y
;;; lday #$1234 ; immediate
;;; lday $1234 ; absolute
.macro lday arg
_op_lo lda, {arg}
_op_hi ldy, {arg}
.endmacro
;;; Load X,Y
;;; ldxy #$1234 ; immediate
;;; ldxy $1234 ; absolute
.macro ldxy arg
_op_lo ldx, {arg}
_op_hi ldy, {arg}
.endmacro
;;; Store A,X
;;; stax $1234 ; absolute
.macro stax arg
sta arg
stx arg+1
.endmacro
;;; Core for add16/sub16
.macro _addsub16 op, opc, arg1, arg2, arg3, arg4, arg5, arg6
.if _is_register {arg2} && _is_register {arg4} && _is_register {arg6}
;; xxx16 $1111,x, $2222,x, $3333,x
lda arg1,arg2
opc
op arg3,arg4
sta arg5,arg6
lda arg1+1,arg2
op arg3+1,arg4
sta arg5+1,arg6
.elseif _is_register {arg2} && _is_register {arg4}
;; xxx16 $1111,x, $2222,x, $3333
lda arg1,arg2
opc
op arg3,arg4
sta arg5
lda arg1+1,arg2
op arg3+1,arg4
sta arg5+1
.elseif _is_register {arg2} && _is_register {arg5}
;; xxx16 $1111,x, $2222, $3333,x
;; xxx16 $1111,x, #$2222, $3333,x
lda arg1,arg2
opc
_op_lo op, {arg3}
sta arg4,arg5
lda arg1+1,arg2
_op_hi op, {arg3}
sta arg4+1,arg5
.elseif _is_register {arg2}
;; xxx16 $1111,x, $2222, $3333
;; xxx16 $1111,x, #$2222, $3333
lda arg1,arg2
opc
_op_lo op, {arg3}
sta arg4
lda arg1+1,arg2
_op_hi op, {arg3}
sta arg4+1
.elseif _is_register {arg3}
;; xxx16 $1111, $2222,x $3333
;; xxx16 #$1111, $2222,x $3333
_op_lo lda, {arg1}
opc
op arg2,arg3
sta arg4
_op_hi lda, {arg1}
op arg2+1,arg3
sta arg4+1
.elseif _is_register {arg4}
;; xxx16 $1111, $2222, $3333,x
;; xxx16 #$1111, $2222, $3333,x
;; xxx16 $1111, #$2222, $3333,x
;; xxx16 #$1111, #$2222, $3333,x
_op_lo lda, {arg1}
opc
_op_lo op, {arg2}
sta arg3,arg4
_op_hi lda, {arg1}
_op_hi op, {arg2}
sta arg3+1,arg4
.else
;; xxx16 $1111, $2222, $3333
;; xxx16 #$1111, $2222, $3333
;; xxx16 $1111, #$2222, $3333
;; xxx16 #$1111, #$2222, $3333
_op_lo lda, {arg1}
opc
_op_lo op, {arg2}
sta arg3
_op_hi lda, {arg1}
_op_hi op, {arg2}
sta arg3+1
.endif
.endmacro
;;; Core for add16/sub16, with leading carry operation
.macro _addsub16lc op, opc, arg1, arg2, arg3, arg4, arg5, arg6
opc
.if _is_register {arg2} && _is_register {arg4} && _is_register {arg6}
;; xxx16 $1111,x, $2222,x, $3333,x
lda arg1,arg2
op arg3,arg4
sta arg5,arg6
lda arg1+1,arg2
op arg3+1,arg4
sta arg5+1,arg6
.elseif _is_register {arg2} && _is_register {arg4}
;; xxx16 $1111,x, $2222,x, $3333
lda arg1,arg2
op arg3,arg4
sta arg5
lda arg1+1,arg2
op arg3+1,arg4
sta arg5+1
.elseif _is_register {arg2} && _is_register {arg5}
;; xxx16 $1111,x, $2222, $3333,x
;; xxx16 $1111,x, #$2222, $3333,x
lda arg1,arg2
_op_lo op, {arg3}
sta arg4,arg5
lda arg1+1,arg2
_op_hi op, {arg3}
sta arg4+1,arg5
.elseif _is_register {arg2}
;; xxx16 $1111,x, $2222, $3333
;; xxx16 $1111,x, #$2222, $3333
lda arg1,arg2
_op_lo op, {arg3}
sta arg4
lda arg1+1,arg2
_op_hi op, {arg3}
sta arg4+1
.elseif _is_register {arg3}
;; xxx16 $1111, $2222,x $3333
;; xxx16 #$1111, $2222,x $3333
_op_lo lda, {arg1}
op arg2,arg3
sta arg4
_op_hi lda, {arg1}
op arg2+1,arg3
sta arg4+1
.elseif _is_register {arg4}
;; xxx16 $1111, $2222, $3333,x
;; xxx16 #$1111, $2222, $3333,x
;; xxx16 $1111, #$2222, $3333,x
;; xxx16 #$1111, #$2222, $3333,x
_op_lo lda, {arg1}
_op_lo op, {arg2}
sta arg3,arg4
_op_hi lda, {arg1}
_op_hi op, {arg2}
sta arg3+1,arg4
.else
;; xxx16 $1111, $2222, $3333
;; xxx16 #$1111, $2222, $3333
;; xxx16 $1111, #$2222, $3333
;; xxx16 #$1111, #$2222, $3333
_op_lo lda, {arg1}
_op_lo op, {arg2}
sta arg3
_op_hi lda, {arg1}
_op_hi op, {arg2}
sta arg3+1
.endif
.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, $2222,x, $3333 ; absolute, indexed, absolute
;;; add16 $1111, $2222, $3333,x ; absolute, absolute, indexed
;;; add16 $1111,x, $2222, $3333,x ; indexed, absolute, indexed
;;; add16 $1111,x, $2222,x, $3333,x ; indexed, indexed, indexed
.macro add16 arg1, arg2, arg3, arg4, arg5, arg6
_addsub16 adc, clc, arg1, arg2, arg3, arg4, arg5, arg6
.endmacro
;;; (as above, but clc precedes first lda)
.macro add16lc arg1, arg2, arg3, arg4, arg5, arg6
_addsub16lc adc, clc, arg1, arg2, arg3, arg4, arg5, arg6
.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
_op_lo lda, {arg1}
clc
adc arg2
sta arg3
_op_hi lda, {arg1}
adc #0
sta arg3+1
.endmacro
;;; Add A,Z to arg1 (immediate or absolute), store to arg2
;;; addax #$1111, $3333 ; immediate, absolute
;;; addax $1111, $3333 ; absolute, absolute
.macro addax arg1, arg2
clc
_op_lo adc, {arg1}
sta arg2
txa
_op_hi adc, {arg1}
sta arg2+1
.endmacro
;;; Subtract arg2 from arg1, store to arg3
;;; sub16 #$1111, #$2222, $3333 ; immediate, immediate, absolute
;;; 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, $3333,x ; absolute, absolute, indexed
;;; sub16 $1111,x, $2222,x, $3333 ; indexed, indexed, absolute
;;; sub16 $1111,x, $2222, $3333,x ; indexed, absolute, indexed
;;; sub16 $1111,x, $2222,x $3333,x ; indexed, indexed, indexed
.macro sub16 arg1, arg2, arg3, arg4, arg5, arg6
_addsub16 sbc, sec, arg1, arg2, arg3, arg4, arg5, arg6
.endmacro
;;; (as above, but sec precedes first lda)
.macro sub16lc arg1, arg2, arg3, arg4, arg5, arg6
_addsub16lc sbc, sec, arg1, arg2, arg3, arg4, arg5, arg6
.endmacro
;;; Subtract arg2 from arg1, store to arg3
;;; sub16_8 #$1111, #$22, $3333 ; immediate, immediate, absolute
;;; sub16_8 #$1111, $22, $3333 ; immediate, absolute, absolute
;;; sub16_8 $1111, #$22, $3333 ; absolute, immediate, absolute
;;; sub16_8 $1111, $22, $3333 ; absolute, absolute, absolute
.macro sub16_8 arg1, arg2, arg3
_op_lo lda, {arg1}
sec
sbc arg2
sta arg3
_op_hi lda, {arg1}
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, $2222,x ; absolute load, indirect store
;;; copy16 $1111,x $2222,x ; indirect load, indirect store
;;; copy16 #$1111, $2222,x ; immediate load, indirect store
.macro copy16 arg1, arg2, arg3, arg4
.if _is_register {arg2} && _is_register {arg4}
;; indexed load/indexed store
lda arg1,arg2
sta arg3,arg4
lda arg1+1,arg2
sta arg3+1,arg4
.elseif _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)
_op_lo lda, {arg1}
sta arg2,arg3
_op_hi lda, {arg1}
sta arg2+1,arg3
.else
_op_lo lda, {arg1}
sta arg2
_op_hi lda, {arg1}
sta arg2+1
.endif
.endmacro
;;; Compare 16-bit values
;;; cmp16 #$1111, #$2222 ; immediate, immediate (silly, but supported)
;;; cmp16 #$1111, $2222 ; immediate, absolute
;;; cmp16 $1111, #$2222 ; absolute, immediate
;;; cmp16 $1111, $2222 ; absolute, absolute
;;; cmp16 $1111,x, $2222 ; indirect, absolute
;;; cmp16 $1111, $2222,x ; 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
.else
_op_lo lda, {arg1}
_op_lo cmp, {arg2}
_op_hi lda, {arg1}
_op_hi sbc, {arg2}
.endif
.endmacro
;;; Shift 16-bit values
;;; lsr16 $1111 ; absolute
.macro lsr16 arg1
lsr arg1+1
ror arg1
.endmacro
;;; asl16 $1111 ; absolute
.macro asl16 arg1
asl arg1
rol arg1+1
.endmacro
;;; Increment 16-bit value
.macro inc16 arg
.local skip
inc arg
bne skip
inc arg+1
skip:
.endmacro
;;; Decrement 16-bit value
.macro dec16 arg
.local skip
lda arg
bne skip
dec arg+1
skip: dec arg
.endmacro
;;; Helper macros to set up a scoped block of parameters at a pre-determined
;;; address.
;;;
;;; Note: to use this macro, your cfg must have a BSS segment:
;;; (BSS: load = BSS, type = bss)
;;;
;;; Example:
;;; .proc my_function
;;; PARAM_BLOCK params, $82
;;; arg1: .res 1
;;; arg2: .res 2
;;; arg3: .res 2
;;; END_PARAM_BLOCK
;;;
;;; lda params::arg1 ; equiv. to lda $82
;;; lda params::arg2 ; equiv. to lda $83
;;; lda params::arg3 ; equiv. to lda $85
;;;
.macro PARAM_BLOCK name, addr
name := addr
.scope name
saved_org := *
.pushseg
.bss
.org addr
start := *
.endmacro
.macro END_PARAM_BLOCK
size := * - start
.popseg
.org saved_org
.endscope
.endmacro