2op_minus

Source Code

// MyCC code example
// Gabriel Capella
class Factorial {
    int f;
    int h;
    public void main() {
        int x;
        x = 98;
        x = x - 49;
        print(x);
    }
}

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Results

Assembly

.globl main

main:
   pushq  %rbp                # Save old EBP
   movq    %rsp, %rbp         # Save old ESP

   movq    $16, %rax
   movq    %rax, %rdi
   callq   malloc@PLT
   testq   %rax, %rax
   jz      fail_exit
   pushq   %rax

   callq   __LABEL0
   popq   %rax

   movq %rbp, %rsp            # Restore ESP
   popq %rbp                  # Restore EBP
   retq

__LABEL0:
   pushq  %rbp                # Save old EBP
   movq    %rsp, %rbp         # Save old ESP
   addq    $-8, %rsp

   ##MovL %0 <- 98
   movq   $98, %rax
   ##MoMo %1 <- %0
   ##MoMo %2 <- %1
   movq   %rax, %rbx
   ##MovL %3 <- 49
   movq   $49, %rax
   ##MoOp %4 <- %2,%3
   imulq   $-1, %rax
   addq   %rbx, %rax
   ##MoMo %1 <- %4
   ##MoMo %5 <- %1
   ##Prin %5
   pushq  %rax                  ## prepare print call
   pushq  %rbx                  ## prepare print call
   movq   %rax, %rdi            ## print
   callq   putchar@PLT
   popq   %rbx
   popq   %rax

   movq    %rbp, %rsp            # Restore ESP
   popq    %rbp                  # Restore EBP
   retq

fail_exit:
   movl   $1, %eax
   popq   %rbp
   retq

Expected

1

Got

1