看一下汇编这样改成c是否可以

只看该作者 · 2016-3-1 22:49

下面的fe_add(fe h,fe f,fe g)本来是汇编写的，因为需要移植到stm32里，2个片子寄存器结构不一样，怕改错，因此想改成c.
能否请看下这样改是否可以？

typedef unsigned int fe[16];

fe x1;
fe x2;
fe z2;

void fe_add(fe h,fe f,fe g); //->见下面汇编

//是否能改成下面c函数
  void fe_add(unsigned int *h,unsigned int *f,unsigned int *g)
  {
   u8 i;
for(i=0;i<16;i++)
{
   h[i]=g[i]+f[i];
}
  }

//汇编
  ; h = g + f
; R12 holds pointer to h
; R13 holds pointer to f
; R14 holds pointer to g

mov       30(R14),R15
add       30(R13),R15
clr       R11
adc       R11

rla       R15
rlc       R11
clrc
rrc       R15
mov       R15,30(R12)

mov       R11,&MPY
mov       #19,&OP2

mov       @R14+,R11
add       @R13+,R11
clr       R15
adc       R15
add       &RESLO,R11
mov       R11,0(R12)

addc       @R14+,R15
clr       R11
adc       R11
add       @R13+,R15
mov       R15,2(R12)

addc       @R14+,R11
clr       R15
adc       R15
add       @R13+,R11
mov       R11,4(R12)

addc       @R14+,R15
clr       R11
adc       R11
add       @R13+,R15
mov       R15,6(R12)

addc       @R14+,R11
clr       R15
adc       R15
add       @R13+,R11
mov       R11,8(R12)

addc       @R14+,R15
clr       R11
adc       R11
add       @R13+,R15
mov       R15,10(R12)

addc       @R14+,R11
clr       R15
adc       R15
add       @R13+,R11
mov       R11,12(R12)

addc       @R14+,R15
clr       R11
adc       R11
add       @R13+,R15
mov       R15,14(R12)

addc       @R14+,R11
clr       R15
adc       R15
add       @R13+,R11
mov       R11,16(R12)

addc       @R14+,R15
clr       R11
adc       R11
add       @R13+,R15
mov       R15,18(R12)

addc       @R14+,R11
clr       R15
adc       R15
add       @R13+,R11
mov       R11,20(R12)

addc       @R14+,R15
clr       R11
adc       R11
add       @R13+,R15
mov       R15,22(R12)

addc       @R14+,R11
clr       R15
adc       R15
add       @R13+,R11
mov       R11,24(R12)

addc       @R14+,R15
clr       R11
adc       R11
add       @R13+,R15
mov       R15,26(R12)

addc       @R14+,R11
clr       R15
adc       R15
add       @R13+,R11
mov       R11,28(R12)

addc       R15,30(R12)

pop.w    R11
eint
reta

END