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/*
 * Copyright (C) 1999           Keith Adams <kma@cse.ogi.edu>
 *                              Oregon Graduate Institute
 */

#include <linux/linkage.h>

/*
 * 64-bit math routines that gcc needs but doesn't have.
 */

/*
 * 64-bit addition.
 *
 * registers:
 * g0 = low word of arg 1, g1 = hi word of arg 1
 * g2 = low word of arg 2, g3 = hi word of arg 2
 * it wants result in g0-g1
 */
#define AC_OVERFLOW_BIT 8
        .globl  SYMBOL_NAME(__adddi3)
SYMBOL_NAME_LABEL(__adddi3)
        cmpo    1, 0
        addc    g0, g2, g0
        addc    g1, g3, g1
        ret

/*
 * 64-bit subtraction: a-b = c
 *
 * registers in:
 * g0-g1 = a; g2-g3 = b
 * registers out:
 * g0-g1 = c
 */
        .globl  SYMBOL_NAME(__subdi3)
SYMBOL_NAME_LABEL(__subdi3)
        cmpo    1, 0
        subc    g2, g0, g0
        subc    g3, g1, g1
        ret