TEXT    longjmp(SB), $0
       MOVL    r+8(FP), AX
       CMPL    AX, $0
       JNE     ok              /* ansi: "longjmp(0) => longjmp(1)" */
       MOVL    $1, AX          /* bless their pointed heads */
ok:
       MOVQ    0(RARG), SP     /* restore sp */
       MOVQ    8(RARG), BX     /* put return pc on the stack */
       MOVQ    BX, 0(SP)
       RET

TEXT    setjmp(SB), $0
       MOVQ    SP, 0(RARG)     /* store sp */
       MOVQ    0(SP), BX       /* store return pc */
       MOVQ    BX, 8(RARG)
       MOVL    $0, AX          /* return 0 */
       RET

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