* config/m68hc11/m68hc11.c (print_operand): Handle 'b' modifier

	for D register to specify the low part of it, aka B.
	(m68hc11_gen_movhi): Use REG_WAS_0 note and increment or decrement
	the register if we are loading 1 or -1 to it; avoid using temp
	register when moving X/Y to Y/X.
	(m68hc11_gen_movqi): Likewise.
	(m68hc11_check_z_replacement): Fix last insn setting for compare case.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@64447 138bc75d-0d04-0410-961f-82ee72b054a4

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 9fee358..49069bd 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,13 @@
+2003-03-16  Stephane Carrez  <stcarrez@nerim.fr>
+
+       * config/m68hc11/m68hc11.c (print_operand): Handle 'b' modifier
+       for D register to specify the low part of it, aka B.
+       (m68hc11_gen_movhi): Use REG_WAS_0 note and increment or decrement
+       the register if we are loading 1 or -1 to it; avoid using temp
+       register when moving X/Y to Y/X.
+       (m68hc11_gen_movqi): Likewise.
+       (m68hc11_check_z_replacement): Fix last insn setting for compare case.
+
 2003-03-14  Mark Mitchell  <mark@codesourcery.com>
 
        PR optimization/9016

diff --git a/gcc/config/m68hc11/m68hc11.c b/gcc/config/m68hc11/m68hc11.c
index ba4407b..0794a3e 100644 (file)
--- a/gcc/config/m68hc11/m68hc11.c
+++ b/gcc/config/m68hc11/m68hc11.c
@@ -2154,6 +2154,10 @@ print_operand (file, op, letter)
          asm_print_register (file, REGNO (op));
          fprintf (file, "+1");
        }
+      else if (letter == 'b' && D_REG_P (op))
+       {
+         asm_print_register (file, HARD_B_REGNUM);
+       }
       else
        {
          asm_print_register (file, REGNO (op));
@@ -3205,6 +3209,16 @@ m68hc11_gen_movhi (insn, operands)
        {
          if (SP_REG_P (operands[0]))
            output_asm_insn ("lds\t%1", operands);
+         else if (!D_REG_P (operands[0])
+                   && GET_CODE (operands[1]) == CONST_INT
+                   && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
+                   && find_reg_note (insn, REG_WAS_0, 0))
+            {
+              if (INTVAL (operands[1]) == 1)
+                output_asm_insn ("in%0", operands);
+              else
+                output_asm_insn ("de%0", operands);
+            }
          else
            output_asm_insn ("ld%0\t%1", operands);
        }
@@ -3370,11 +3384,17 @@ m68hc11_gen_movhi (insn, operands)
                   output_asm_insn ("xgdx", operands);
                   CC_STATUS_INIT;
                 }
-              else
+              else if (!optimize_size)
                 {
                   output_asm_insn ("sty\t%t1", operands);
                   output_asm_insn ("ldx\t%t1", operands);
                 }
+              else
+                {
+                  CC_STATUS_INIT;
+                  output_asm_insn ("pshy", operands);
+                  output_asm_insn ("pulx", operands);
+                }
            }
          else if (SP_REG_P (operands[1]))
            {
@@ -3382,6 +3402,15 @@ m68hc11_gen_movhi (insn, operands)
              cc_status = cc_prev_status;
              output_asm_insn ("tsx", operands);
            }
+         else if (GET_CODE (operands[1]) == CONST_INT
+                   && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
+                   && find_reg_note (insn, REG_WAS_0, 0))
+            {
+              if (INTVAL (operands[1]) == 1)
+                output_asm_insn ("in%0", operands);
+              else
+                output_asm_insn ("de%0", operands);
+            }
          else
            {
              output_asm_insn ("ldx\t%1", operands);
@@ -3412,11 +3441,17 @@ m68hc11_gen_movhi (insn, operands)
                   output_asm_insn ("xgdy", operands);
                   CC_STATUS_INIT;
                 }
-              else
+              else if (!optimize_size)
                 {
                   output_asm_insn ("stx\t%t1", operands);
                   output_asm_insn ("ldy\t%t1", operands);
                 }
+              else
+                {
+                  CC_STATUS_INIT;
+                  output_asm_insn ("pshx", operands);
+                  output_asm_insn ("puly", operands);
+                }
            }
          else if (SP_REG_P (operands[1]))
            {
@@ -3424,7 +3459,16 @@ m68hc11_gen_movhi (insn, operands)
              cc_status = cc_prev_status;
              output_asm_insn ("tsy", operands);
            }
-         else
+         else if (GET_CODE (operands[1]) == CONST_INT
+                   && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
+                   && find_reg_note (insn, REG_WAS_0, 0))
+            {
+              if (INTVAL (operands[1]) == 1)
+                output_asm_insn ("in%0", operands);
+              else
+                output_asm_insn ("de%0", operands);
+            }
+          else
            {
              output_asm_insn ("ldy\t%1", operands);
            }
@@ -3664,6 +3708,15 @@ m68hc11_gen_movqi (insn, operands)
                  output_asm_insn ("ldab\t%T0", operands);
                }
            }
+         else if (GET_CODE (operands[1]) == CONST_INT
+                   && (INTVAL (operands[1]) == 1 || INTVAL (operands[1]) == -1)
+                   && find_reg_note (insn, REG_WAS_0, 0))
+            {
+              if (INTVAL (operands[1]) == 1)
+                output_asm_insn ("inc%b0", operands);
+              else
+                output_asm_insn ("dec%b0", operands);
+            }          
          else if (!DB_REG_P (operands[1]) && !D_REG_P (operands[1])
                   && !DA_REG_P (operands[1]))
            {
@@ -4191,7 +4244,7 @@ m68hc11_check_z_replacement (insn, info)
                  info->need_save_z = 0;
                  info->found_call = 1;
                  info->regno = SOFT_Z_REGNUM;
-                 info->last = insn;
+                 info->last = NEXT_INSN (insn);
                }
              return 0;
            }