From: Jeff Law <law@gcc.gnu.org>
Date: Sun, 8 Jun 1997 21:20:21 +0000 (-0600)
Subject: pa.md (conditional branch insns): Get length right for branches to targets which... 
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=4bcb9e3f39582de69f645029ce5d279ac1eff598;p=gcc.git

pa.md (conditional branch insns): Get length right for branches to targets which can not be reached with a "bl"...

        * pa.md (conditional branch insns): Get length right for branches
        to targets which can not be reached with a "bl" instruction.
        * pa.c (output_cbranch): Handle branches to targets which can not
        be reached with a "bl" instruction.

From-SVN: r14172
---

diff --git a/gcc/config/pa/pa.c b/gcc/config/pa/pa.c
index 0eae0b1c1b6..75c10212917 100644
--- a/gcc/config/pa/pa.c
+++ b/gcc/config/pa/pa.c
@@ -4390,6 +4390,68 @@ output_cbranch (operands, nullify, length, negated, insn)
 	  }
 	break;
 
+      case 20:
+	/* Very long branch.  Right now we only handle these when not
+	   optimizing.  See "jump" pattern in pa.md for details.  */
+	if (optimize)
+	  abort ();
+
+	/* Create a reversed conditional branch which branches around
+	   the following insns.  */
+	if (negated)
+	  strcpy (buf, "com%I2b,%S3,n %2,%1,.+20");
+	else
+	  strcpy (buf, "com%I2b,%B3,n %2,%1,.+20");
+	output_asm_insn (buf, operands);
+
+	/* Output an insn to save %r1.  */
+	output_asm_insn ("stw %%r1,-16(%%r30)", operands);
+
+	/* Now output a very long branch to the original target.  */
+	output_asm_insn ("ldil L'%l0,%%r1\n\tbe R'%l0(%%sr4,%%r1)", operands);
+
+	/* Now restore the value of %r1 in the delay slot.  We're not
+	   optimizing so we know nothing else can be in the delay slot.  */
+	return "ldw -16(%%r30),%%r1";
+
+      case 28:
+	/* Very long branch when generating PIC code.  Right now we only
+	   handle these when not optimizing.  See "jump" pattern in pa.md
+	   for details.  */
+	if (optimize)
+	  abort ();
+
+	/* Create a reversed conditional branch which branches around
+	   the following insns.  */
+	if (negated)
+	  strcpy (buf, "com%I2b,%S3,n %2,%1,.+28");
+	else
+	  strcpy (buf, "com%I2b,%B3,n %2,%1,.+28");
+	output_asm_insn (buf, operands);
+
+	/* Output an insn to save %r1.  */
+	output_asm_insn ("stw %%r1,-16(%%r30)", operands);
+
+	/* Now output a very long PIC branch to the original target.  */
+	{
+	  rtx xoperands[5];
+
+	  xoperands[0] = operands[0];
+	  xoperands[1] = operands[1];
+	  xoperands[2] = operands[2];
+	  xoperands[3] = operands[3];
+	  xoperands[4] = gen_label_rtx ();
+
+	  output_asm_insn ("bl .+8,%%r1\n\taddil L'%l0-%l4,%%r1", xoperands);
+	  ASM_OUTPUT_INTERNAL_LABEL (asm_out_file, "L",
+				     CODE_LABEL_NUMBER (xoperands[4]));
+	  output_asm_insn ("ldo R'%l0-%l4(%%r1),%%r1\n\tbv 0(%%r1)", xoperands);
+	}
+
+	/* Now restore the value of %r1 in the delay slot.  We're not
+	   optimizing so we know nothing else can be in the delay slot.  */
+	return "ldw -16(%%r30),%%r1";
+	
       default:
 	abort();
     }
diff --git a/gcc/config/pa/pa.md b/gcc/config/pa/pa.md
index 9a4165c6fff..35519740ba4 100644
--- a/gcc/config/pa/pa.md
+++ b/gcc/config/pa/pa.md
@@ -1034,10 +1034,15 @@
 }"
 [(set_attr "type" "cbranch")
  (set (attr "length")
-    (if_then_else (lt (abs (minus (match_dup 0) (plus (pc) (const_int 8))))
-		      (const_int 8184))
-           (const_int 4)
-	   (const_int 8)))])
+    (cond [(lt (abs (minus (match_dup 0) (plus (pc) (const_int 8))))
+	       (const_int 8184))
+	   (const_int 4)
+	   (lt (abs (minus (match_dup 0) (plus (pc) (const_int 8))))
+	       (const_int 262100))
+	   (const_int 8)
+	   (eq (symbol_ref "flag_pic") (const_int 0))
+	   (const_int 20)]
+	  (const_int 28)))])
 
 ;; Match the negated branch.
 
@@ -1057,10 +1062,15 @@
 }"
 [(set_attr "type" "cbranch")
  (set (attr "length")
-    (if_then_else (lt (abs (minus (match_dup 0) (plus (pc) (const_int 8))))
-		      (const_int 8184))
-           (const_int 4)
-	   (const_int 8)))])
+    (cond [(lt (abs (minus (match_dup 0) (plus (pc) (const_int 8))))
+	       (const_int 8184))
+	   (const_int 4)
+	   (lt (abs (minus (match_dup 0) (plus (pc) (const_int 8))))
+	       (const_int 262100))
+	   (const_int 8)
+	   (eq (symbol_ref "flag_pic") (const_int 0))
+	   (const_int 20)]
+	  (const_int 28)))])
 
 ;; Branch on Bit patterns.
 (define_insn ""