[patch] h8300.c: Clean up output_a_shift().

[patch] h8300.c: Clean up output_a_shift().

[Kazu Hirata]

Hi,

Attached is a patch to clean up output_a_shift().

On h8300 port, some shifts in SImode used to use rotation followed by
and, but not anymore, so the patch removes the code to output such
assembly instructions.

Tested on h8300 port.  Committed.

Kazu Hirata

2002-12-19  Kazu Hirata  <kazu@cs.umass.edu>

	* config/h8300/h8300.md (output_a_shift): Clean up the code to
	output shifts using rotation.

Index: h8300.c
===================================================================
RCS file: /cvs/gcc/gcc/gcc/config/h8300/h8300.c,v
retrieving revision 1.175
diff -c -r1.175 h8300.c
*** h8300.c	16 Dec 2002 18:21:13 -0000	1.175
--- h8300.c	19 Dec 2002 20:18:04 -0000
***************
*** 3026,3055 ****
  	      output_asm_insn (info.shift1, operands);
  
  	    /* Now mask off the high bits.  */
! 	    if (TARGET_H8300)
  	      {
! 		switch (mode)
  		  {
- 		  case QImode:
- 		    sprintf (insn_buf, "and\t#%d,%%X0", mask);
- 		    cc_status.value1 = operands[0];
- 		    cc_status.flags |= CC_NO_CARRY;
- 		    break;
- 		  case HImode:
  		    sprintf (insn_buf, "and\t#%d,%%s0\n\tand\t#%d,%%t0",
  			     mask & 255, mask >> 8);
- 		    break;
- 		  default:
- 		    abort ();
  		  }
! 	      }
! 	    else
! 	      {
! 		sprintf (insn_buf, "and.%c\t#%d,%%%c0",
! 			 "bwl"[shift_mode], mask,
! 			 mode == QImode ? 'X' : mode == HImode ? 'T' : 'S');
! 		cc_status.value1 = operands[0];
! 		cc_status.flags |= CC_NO_CARRY;
  	      }
  	    output_asm_insn (insn_buf, operands);
  	    return "";
--- 3026,3053 ----
  	      output_asm_insn (info.shift1, operands);
  
  	    /* Now mask off the high bits.  */
! 	    switch (mode)
  	      {
! 	      case QImode:
! 		sprintf (insn_buf, "and\t#%d,%%X0", mask);
! 		cc_status.value1 = operands[0];
! 		cc_status.flags |= CC_NO_CARRY;
! 		break;
! 	      case HImode:
! 		if (TARGET_H8300)
  		  {
  		    sprintf (insn_buf, "and\t#%d,%%s0\n\tand\t#%d,%%t0",
  			     mask & 255, mask >> 8);
  		  }
! 		else
! 		  {
! 		    sprintf (insn_buf, "and.w\t#%d,%%T0", mask);
! 		    cc_status.value1 = operands[0];
! 		    cc_status.flags |= CC_NO_CARRY;
! 		  }
! 		break;
! 	      default:
! 		abort ();
  	      }
  	    output_asm_insn (insn_buf, operands);
  	    return "";