enum_double.asm

example::double:
        mov     rax, rdi                 
        mov     rcx, qword ptr [rsi]      ; Read the enum discriminator
        test    rcx, rcx                  ; Check the discriminator for 0
        je      .LBB0_5
        cmp     ecx, 1
        jne     .LBB0_3
        movsd   xmm0, qword ptr [rsi + 8]
        addsd   xmm0, xmm0
        movsd   qword ptr [rax + 8], xmm0
        mov     ecx, 1
        mov     qword ptr [rax], rcx
        ret
.LBB0_5:
        mov     rcx, qword ptr [rsi + 8]
        add     rcx, rcx
        mov     qword ptr [rax + 8], rcx
        xor     ecx, ecx
        mov     qword ptr [rax], rcx
        ret
.LBB0_3:
        movsd   xmm0, qword ptr [rsi + 8]
        movsd   xmm1, qword ptr [rsi + 16]
        addsd   xmm0, xmm0
        addsd   xmm1, xmm1
        movsd   qword ptr [rax + 8], xmm0
        movsd   qword ptr [rax + 16], xmm1
        mov     ecx, 2
        mov     qword ptr [rax], rcx
        ret