source: trunk/softs/tests_cc_vcache/test_ao_delayslot/test.S @ 659

/*
 * arithmetic overflow test: check that a overflow in a delay slot is
 * properly handled
 */
#include <registers.h>
#include <misc.h>

        .text
        .globl  _start
_start:
        .set noreorder
        la      k0, TTY_BASE
        la      k1, EXIT_BASE
        la      sp, 0x00400000 - 16

        PRINT(startstr)

        /* reset cop0 status (keep BEV) */
        lui     a0, 0x0040;
        mtc0    a0, COP0_STATUS
        la      a0, 0x7fffffff
        li      a1, 0x02
        j       exit
        add     a0, a0, a1
        /* we should not get there, */
        EXIT(2)
        .globl exit
exit:
        move    a0, v0
        PRINTX
        PUTCHAR(' ')
        move    a0, v1
        PRINTX
        PUTCHAR('\n')
        /* we should get there */
        EXIT(0)

        .globl excep
excep:
        .set noreorder
        PRINT(statusstr)
        mfc0    a0, COP0_STATUS
        PRINTX

        PRINT(causestr)
        mfc0    a0, COP0_CAUSE
        PRINTX

        PRINT(pcstr)
        mfc0    a0, COP0_EXPC
        PRINTX

        PRINT(badvastr)
        mfc0    a0, COP_0_BADVADDR
        PRINTX
        PUTCHAR('\n')
        la      a0, exit
        mtc0    a0, COP0_EXPC
        li      v0, MAGIC1
        li      v1, MAGIC2
        li      a3, 1
        eret
        nop

#we should not end there
        EXIT(1)

        .rodata:
statusstr: .ascii "status \0"
causestr: .ascii " cause \0"
pcstr: .ascii " pc \0"
badvastr: .ascii " badva \0"
startstr: .ascii "start\n\0"
usrstr: .ascii "usrmode\n\0"

        .org EXCEP_ADDRESS - BOOT_ADDRESS
        .globl evect
evect:
        j       excep
        nop
        .data
        .word MAGIC1
testval:
        .word MAGIC2