Path: utzoo!telly!attcan!uunet!tut.cis.ohio-state.edu!MCC.COM!rfg
From: rfg@MCC.COM (Ron Guilmette)
Newsgroups: gnu.gcc.bug
Subject: BUG(s) in GCC/G++ m88k.md file (1.32.0)
Message-ID: <8902031908.AA02418@riunite.aca.mcc.com>
Date: 3 Feb 89 19:08:10 GMT
Sender: daemon@tut.cis.ohio-state.edu
Distribution: gnu
Organization: GNUs Not Usenet
Lines: 58


There appears to be a problem with three of the instruction
patterns in the m88k.md file (as of 1.32).

The andsi3, iorsi3, and xorsi3 patterns cause the upper half
of the result word to be clobbered by the second machine
instruction generated.  This only happens in cases where one
of the values to be and'ed, or'ed, or xor'ed is a literal
constant.

The following minor patches fix all three problems.

// Ron Guilmette  -  MCC  -  Experimental (parallel) Systems Kit Project
// 3500 West Balcones Center Drive,  Austin, TX  78759  -  (512)338-3740
// ARPA: rfg@mcc.com
// UUCP: {rutgers,uunet,gatech,ames,pyramid}!cs.utexas.edu!pp!rfg

*** m88k.md-	Tue Jan 31 14:46:53 1989
--- m88k.md	Fri Feb  3 12:58:03 1989
***************
*** 1659,1663 ****
        return \"and\\t %0,%1,%2\";
      }
!   return \"and.u\\t %0,%1,hi16(%2)\;and\\t %0,%1,lo16(%2)\";
  }")
  
--- 1659,1663 ----
        return \"and\\t %0,%1,%2\";
      }
!   return \"and.u\\t %0,%1,hi16(%2)\;and\\t %0,%0,lo16(%2)\";
  }")
  
***************
*** 1684,1688 ****
    if (INT_FITS_16_BITS (i))
      return \"or\\t %0,%1,%2\";
!   return \"or.u\\t %0,%1,hi16(%2)\;or\\t %0,%1,lo16(%2)\";
  }")
  
--- 1684,1688 ----
    if (INT_FITS_16_BITS (i))
      return \"or\\t %0,%1,%2\";
!   return \"or.u\\t %0,%1,hi16(%2)\;or\\t %0,%0,lo16(%2)\";
  }")
  
***************
*** 1711,1715 ****
    if ((i & 0xffff) == 0)
      return \"xor.u\\t %0,%1,hi16(%2)\";
!   return \"xor.u\\t %0,%1,hi16(%2)\;xor\\t %0,%1,lo16(%2)\";
  }")
  
--- 1711,1715 ----
    if ((i & 0xffff) == 0)
      return \"xor.u\\t %0,%1,hi16(%2)\";
!   return \"xor.u\\t %0,%1,hi16(%2)\;xor\\t %0,%0,lo16(%2)\";
  }")