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niffler

0.3.2
0.3.4 0.3.3 0.3.2 0.3.1 0.3.0 0.1.11

Just-In-Time nif generator, FFI generator, C-compiler based on TinyCC. For Linux, MacOS, Windows (msys2)

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niffler c_src tinycc lib alloca86_64.S
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c_src/tinycc/lib/alloca86_64.S 

/* ---------------------------------------------- */

/* alloca86_64.S */



#ifdef __leading_underscore

# define _(s) _##s

#else

# define _(s) s

#endif



.globl _(alloca)

_(alloca):

    pop     %rdx

#ifdef _WIN32

    mov     %rcx,%rax

#else

    mov     %rdi,%rax

#endif

    add     $15,%rax

    and     $-16,%rax

    jz      p3



#ifdef _WIN32

p1:

    cmp     $4096,%rax

    jbe     p2

    test    %rax,-4096(%rsp)

    sub     $4096,%rsp

    sub     $4096,%rax

    jmp p1

p2:

#endif

    sub     %rax,%rsp

    mov     %rsp,%rax

p3:

    push    %rdx

    ret



/* ---------------------------------------------- */