sceGe_lazy_31129B95 reverse

s32 sceGe_lazy_31129B95(s32 dlId, void *stall)
{
    s32 tmp0;
    s32 tmp1;
    s32 ret;

    if (dlId == g_lazy.dlId) {
        g_lazy.stall = stall;

        if (stall != NULL) {
            g_lazy.count++;

            if (g_lazy.count < g_lazy.max) {
                return 0;
            }
        }
    }

    if (g_lazy.dlId < 0) {
        goto loc_000001C0;
    }

    do {
        /* begin atomic RMW */
        asm __volatile__(
            "ll %0, (%1)"
            : "=r" (tmp0)
            : "r" (&g_lazy.dlId)
        );

        tmp1 = -1;

        if (tmp0 != g_lazy.dlId) {
            goto loc_000001C0;
        }

        /* end atomic RMW */
        /* if an atomic update as occured, %0 will be set to 1 */
        asm __volatile__(
            "sc %0, (%1)"
            : "=r" (tmp1)
            : "r" (&g_lazy.dlId)
        );
    } while (!tmp1);

    sub_00000208(tmp0, g_lazy.stall);

loc_000001C0:

    ret = sub_00000208(dlId, stall);

    if (ret < 0) {
        return ret;
    }

    do {
        /* begin atomic RMW */
        asm __volatile__(
            "ll %0, (%1)"
            : "=r" (tmp0)
            : "r" (&g_lazy.dlId)
        );

        tmp1 = dlId;

        if (tmp0 >= 0) {
            return ret;
        }

        /* end atomic RMW */
        /* if an atomic update as occured, %0 will be set to 1 */
        asm __volatile__(
            "sc %0, (%1)"
            : "=r" (tmp1)
            : "r" (&g_lazy.dlId)
        );
    } while (!tmp1);

    g_lazy.stall = stall;
    g_lazy.count = 0;

    return ret;
}