我正在尝试编译此代码片段,但我一生都无法理解汇编程序错误:
[...]
.macro collflag flags
RW_forced a8i16
lda EXRAM, x
and flags
RW_forced a16i16
.endmac
[...]
col_r:
RW_forced a16i16
lda lamus_vx
bmi col_l
beq col_d
lda lamus_tile
inc a
tax
collflag #PROPS_WALL_LEFT
beq :+
jmp r_detected ; Collision detected - right
: lda lamus_y
and #$0300
beq col_d
txa
add #32
tax
collflag #PROPS_WALL_LEFT
beq col_d
; Collision detected - right
在这段代码提取中,我得到了这个汇编错误:
metroix.s(264): Error: Range error (130 not in [-128..127])
第 264 行将指:
beq col_d
RW_forced 是在一个库中实现的,实际上他们应该做的就是输出应该可以工作的 sep/rep 指令和 .a8/.a16 宏。但这是他们的实现,对我来说看起来不错:
/**
Macro: RW_assume
Assume known accumulator/index register widths without emitting any instructions
Parameter:
>:in: widths Register widths a8/a16/i8/i16/a8i8/a16i16/a8i16/a16i8
*/
.macro RW_assume widths
.if .blank({widths})
SFX_error "RW_assume: Missing required parameter"
.else
RW_init
.if .xmatch({widths},{a8})
SFX_RW_a_size .set 1
.a8
.elseif .xmatch({widths},{a16})
SFX_RW_a_size .set 0
.a16
.elseif .xmatch({widths},{i8})
SFX_RW_i_size .set 1
.i8
.elseif .xmatch({widths},{i16})
SFX_RW_i_size .set 0
.i16
.elseif .xmatch({widths},{a8i8})
RW_assume a8
RW_assume i8
.elseif .xmatch({widths},{a16i16})
RW_assume a16
RW_assume i16
.elseif .xmatch({widths},{a8i16})
RW_assume a8
RW_assume i16
.elseif .xmatch({widths},{a16i8})
RW_assume a16
RW_assume i8
.else
SFX_error "RW_assume: Illegal parameter"
.endif
.endif
.endmac
/**
Macro: RW_forced
Force set accumulator/index register widths (ie. always emit rep/sep instructions)
Parameter:
>:in: widths Register widths a8/a16/i8/i16/a8i8/a16i16/a8i16/a16i8
*/
.macro RW_forced widths
.if .blank({widths})
SFX_error "RW_forced: Missing required parameter"
.else
.if .xmatch({widths},{a8i8})
sep #$30
.elseif .xmatch({widths},{a16i16})
rep #$30
.elseif .xmatch({widths},{a8i16})
sep #$20
rep #$10
.elseif .xmatch({widths},{a16i8})
rep #$20
sep #$10
.else
SFX_error "RW_forced: Illegal parameter"
.endif
RW_assume widths
.endif
.endmac
我的问题是,到底是怎么回事,beq col_d
或者它周围的任何东西超出了范围?130在哪里?这是汇编程序中的错误吗?
作为参考,如果我将 EITHER callflag 调用更改为没有 RW_forced 调用的另一个版本,则代码会组装(但错误)。