source: branches/v4/softs/tests_ccvcache_v4/test_fpediv/test.S @ 1013

/*
 * trap test: check that a we can generate a trap from FPE instruction
 */
#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), enable cop1 */
        lui     a0, 0x2040;
        mtc0    a0, COP0_STATUS
        /* enable COP1 exceptions */
        li      a0, 0x0f80
        ctc1    a0, $31
#if 0
        li      a0, 0xf000
        ctc1    a0, $26
#endif
        la      a0, div1
        lwc1    $f2, 0(a0)
        la      a0, div2
        lwc1    $f0, 0(a0)
        div.s   $f0, $f2, $f0
        cfc1    a0, $31
        PRINTX
        PUTCHAR('\n')
        EXIT(2)

        .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')
#we should end there
        EXIT(0)

        .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
        .globl div1
div1:
        .float  10.0
        .globl div2
div2:
        .float  0.0