Subversion Repositories openrisc_2011-10-31

; File bwtest-err-1.s

;  { dg-do assemble { target cris-*-* } }

; A variant of exbwtest.s.  This is an example of invalid use of the broken-

; dot-word function.  The nearest label occurs about 32 kbytes after the primary

; jump table so the secondary jump table can't be reached by word displace-

; ments and the broken words overflow.

;  main()

;  {

;    byte i;

;

;    for (i=0; i <= 3; i++) {

;      result[i] = funct(i);

;    }

;  }

;

;  Register use :  r1 - i

;                  r2 - result address

        .text

        .syntax no_register_prefix

        .word   0

main:   move.d  stack,sp

        moveq   0,r1

        move.d  result,r2

for1:   cmpq    3,r1

        bgt     endfor1

        move.d  r1,r0

        jsr     funct

        move.w  r0,[r2+r1.w]

        ba      for1

        addq    1,r1

endfor1:

end:    ba      end

        nop

;  uword funct(i)

;    byte i;

;  {

;    switch (i) {

;      case 0 :  return 0x1111;

;      case 1 :  return 0x2222;

;      case 2 :  return 0x3333;

;      case 3 :  return 0x4444;

;    }

;  }

;

;  Parameters   :  r0 - i

;

;  Register use :  r1 - pjt address

funct:  push    r1

        move.d  pjt,r1

        adds.w  [r1+r0.w],pc

pjt:    .word   near1 - pjt

        .word   near2 - pjt

        .word   far1 - pjt

        .word   far2 - pjt

; Note that the line-number of the source-location of the error

; seems slightly off from the user perspective, but it's the

; best I could get without major changes in BW-handling.  Not

; sure it it's worth fixing.  May need adjustments if

; BW-handling changes.  Four errors from four .words are what's

; expected.

        .space  32760,0xFF; { dg-error "Adjusted signed \.word \(.*\) overflow.*" }

near1:  move.w  0x1111,r0

        ba      ret1

        nop

near2:  move.w  0x2222,r0

        ba      ret1

        nop

far1:   move.w  0x3333,r0

        ba      ret1

        nop

far2:   move.w  0x4444,r0

ret1:   pop     r1

        ret

result: .space  4 * 2   ; static uword result[4];

        .space  4

stack: