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前面就没有判断语句啊,我才问的。这是CLA文档的例程
TMS320x2803x Piccolo Control Law Accelerator
(CLA)
Reference Guide
; Given: X = 8.0
; Y = 7.0
; A = 2.0
; B = 5.0
; _ClaTask1
MMOV32 MR3, @_X ; MR3 = X = 8.0
MMOV32 MR0, @_Y ; MR0 = Y = 7.0
MMAXF32 MR3, MR0 ; ZF = 0, NF = 0, MR3 = 8.0
MMOV32 MR1, @_A, GT ; true, MR1 = A = 2.0
MMOV32 MR1, @_B, LT ; false, does not load MR1
MMOV32 MR2, MR1, GT ; true, MR2 = MR1 = 2.0
MMOV32 MR2, MR0, LT ; false, does not load MR2
MSTOP
是根据MMAXF32 MR3, MR0 ;来判断的,也就是说如果MR0>MR3的话,NF为1 ,则LT为真,MMOV32 MR2, MR0, LT ;语句就会加载MR0的值到MR2。反之就不会加载。
我还想问下,我在用cla.asm模块时,在其它.c文件中定义一个变量A,用A来改变cla.asm中的变量B,初始化也对,我发现无论A怎么改变,B都不随A的值改变,我想问的是,难道去CLA.asm文件中的变量B改变时还需要其它触发源或者寄存器配置吗》?