From 324c3b05da99cf3c15014f16caea6f882d7f488c Mon Sep 17 00:00:00 2001
From: bwilson <bwilson@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Tue, 10 May 2005 15:56:54 +0000
Subject: [PATCH] 	* config/xtensa/lib1funcs.asm (__udivsi3, __divsi3):
 Rearrange special 	case code to avoid one move instruction. 
 (__umodsi3, __modsi3): Merge duplicated code sequences.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@99520 138bc75d-0d04-0410-961f-82ee72b054a4
---
 gcc/ChangeLog                   |  6 +++++
 gcc/config/xtensa/lib1funcs.asm | 53 +++++++++++++++++------------------------
 2 files changed, 28 insertions(+), 31 deletions(-)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 7e817dd2514..8b9235fa4e8 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2005-05-10  Bob Wilson  <bob.wilson@acm.org>
+
+	* config/xtensa/lib1funcs.asm (__udivsi3, __divsi3): Rearrange special
+	case code to avoid one move instruction.
+	(__umodsi3, __modsi3): Merge duplicated code sequences.
+
 2005-05-10  Kazu Hirata  <kazu@cs.umass.edu>
 
 	* config/mips/24k.md, config/sh/divtab.c, config/sh/sh.c,
diff --git a/gcc/config/xtensa/lib1funcs.asm b/gcc/config/xtensa/lib1funcs.asm
index 1b11dafdca4..bc3c45218f0 100644
--- a/gcc/config/xtensa/lib1funcs.asm
+++ b/gcc/config/xtensa/lib1funcs.asm
@@ -299,19 +299,21 @@ __udivsi3:
 .Lreturn:
 	abi_return
 
+.Lle_one:
+	beqz	a3, .Lerror	# if divisor == 1, return the dividend
+	abi_return
+
 .Lspecial:
 	# return dividend >= divisor
-	movi	a2, 0
-	bltu	a6, a3, .Lreturn2
+	bltu	a6, a3, .Lreturn0
 	movi	a2, 1
-.Lreturn2:
 	abi_return
 
-.Lle_one:
-	beqz	a3, .Lerror	# if divisor == 1, return the dividend
-	abi_return
 .Lerror:
-	movi	a2, 0		# just return 0; could throw an exception
+	# just return 0; could throw an exception
+
+.Lreturn0:
+	movi	a2, 0
 	abi_return
 	.size	__udivsi3,.-__udivsi3
 
@@ -361,22 +363,24 @@ __divsi3:
 	movltz	a2, a5, a7	# return (sign < 0) ? -quotient : quotient
 	abi_return
 
+.Lle_one:
+	beqz	a3, .Lerror
+	neg	a2, a6		# if udivisor == 1, then return...
+	movgez	a2, a6, a7	# (sign < 0) ? -udividend : udividend
+	abi_return
+
 .Lspecial:
-	movi	a2, 0
-	bltu	a6, a3, .Lreturn2 #  if dividend < divisor, return 0
+	bltu	a6, a3, .Lreturn0 #  if dividend < divisor, return 0
 	movi	a2, 1
 	movi	a4, -1
 	movltz	a2, a4, a7	# else return (sign < 0) ? -1 :	 1 
-.Lreturn2:
 	abi_return
 
-.Lle_one:
-	beqz	a3, .Lerror
-	neg	a2, a6		# if udivisor == 1, then return...
-	movgez	a2, a6, a7	# (sign < 0) ? -udividend : udividend
-	abi_return
 .Lerror:
-	movi	a2, 0		# just return 0; could throw an exception
+	# just return 0; could throw an exception
+
+.Lreturn0:
+	movi	a2, 0
 	abi_return
 	.size	__divsi3,.-__divsi3
 
@@ -414,17 +418,12 @@ __umodsi3:
 #endif /* !XCHAL_HAVE_LOOPS */
 .Lloopend:
 
+.Lspecial:
 	bltu	a2, a3, .Lreturn
 	sub	a2, a2, a3	# subtract once more if dividend >= divisor
 .Lreturn:
 	abi_return
 
-.Lspecial:
-	bltu	a2, a3, .Lreturn2
-	sub	a2, a2, a3	# subtract once if dividend >= divisor
-.Lreturn2:
-	abi_return
-
 .Lle_one:
 	# the divisor is either 0 or 1, so just return 0.
 	# someday we may want to throw an exception if the divisor is 0.
@@ -468,6 +467,7 @@ __modsi3:
 #endif /* !XCHAL_HAVE_LOOPS */
 .Lloopend:
 
+.Lspecial:
 	bltu	a2, a3, .Lreturn
 	sub	a2, a2, a3	# subtract once more if udividend >= udivisor
 .Lreturn:
@@ -476,15 +476,6 @@ __modsi3:
 .Lpositive:	
 	abi_return
 
-.Lspecial:
-	bltu	a2, a3, .Lreturn2
-	sub	a2, a2, a3	# subtract once if dividend >= divisor
-.Lreturn2:
-	bgez	a7, .Lpositive2
-	neg	a2, a2		# if (dividend < 0), return -udividend
-.Lpositive2:	
-	abi_return
-
 .Lle_one:
 	# udivisor is either 0 or 1, so just return 0.
 	# someday we may want to throw an exception if udivisor is 0.
-- 
2.11.0