TEXT    longjmp(SB), $0
       MOVL    r+4(FP), AX
       CMPL    AX, $0
       JNE     ok              /* ansi: "longjmp(0) => longjmp(1)" */
       MOVL    $1, AX          /* bless their pointed heads */
ok:     MOVL    l+0(FP), BX
       MOVL    0(BX), SP       /* restore sp */
       MOVL    4(BX), BX       /* put return pc on the stack */
       MOVL    BX, 0(SP)
       RET

TEXT    setjmp(SB), $0
       MOVL    l+0(FP), AX
       MOVL    SP, 0(AX)       /* store sp */
       MOVL    0(SP), BX       /* store return pc */
       MOVL    BX, 4(AX)
       MOVL    $0, AX          /* return 0 */
       RET

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