64 lines
1.2 KiB
C
64 lines
1.2 KiB
C
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#include<inttypes.h>
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/*
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PUSH EBP
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MOV EBP, ESP
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SUB ESP , 4 ; reserve 4 bytes in the stack frame -> local variable int32_t -> i
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MOV DWORD PTR [ EBP − 4 ] , 1 ; initialize local variable with 1
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; EBP+8 : first parameter -> a
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; EBP+12 : second parameter -> b
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loop:
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CMP DWORD PTR [ EPB+ 8 ] , 99 ; while (a >= 99)
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JL SHORT exit
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LEA EAX, [ EBP+12 ] ; eax = *b;
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DEC DWORD PTR [EAX] ; *b--;
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CMP DWORD PTR [ EBP+ 12 ] , 99 ; if (b >= 99)
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JL SHORT continue
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JMP SHORT exit ; break
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continue:
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MOV EDX, [ EBP+8] ; edx = a
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LEA EAX, [ EBP − 4] ; eax = *i
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ADD DWORD PTR [EAX] , EDX ; *eax += edx -> i += a
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INC DWORD PTR [ EBP+8] ; a++;
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JMP SHORT loop ; loop
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exit:
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MOV EAX, DWORD PTR [ EBP − 4] ; return i
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MOV ESP , EBP ; cleanup
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POP EBP ; cleanup
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RETN
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*/
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int32_t f(int32_t a, int32_t b) {
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int32_t i = 1;
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b--;
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while (a >= 99 && b < 99) {
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i += a;
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a++;
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b--;
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}
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return i;
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}
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/* int32_t f(int32_t a, int32_t b) { */
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/* int32_t i = 1; */
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/* while (a >= 99) { */
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/* b--; */
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/* if (b < 99) { */
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/* i += a; */
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/* a++; */
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/* } else { */
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/* break; */
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/* } */
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/* } */
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/* return i; */
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/* } */
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int main(void) {
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f(1,2);
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}
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