From 582711fee49c285d426eba3776ad7a556226723f Mon Sep 17 00:00:00 2001
From: Bob Wilson <bob.wilson@acm.org>
Date: Fri, 8 Jun 2007 16:49:23 +0000
Subject: [PATCH] lib1funcs.asm (__udivsi3): Use hardware divide instructions
 if they are supported.

	* config/xtensa/lib1funcs.asm (__udivsi3): Use hardware divide
	instructions if they are supported.
	(__divsi3, __umodsi3, __modsi3): Likewise.
	(__ashldi3, __ashrdi3, __lshrdi3): New.
	* config/xtensa/t-xtensa (LIB1ASMFUNCS): Add DImode shift functions.

From-SVN: r125577
---
 gcc/ChangeLog                   |  8 +++
 gcc/config/xtensa/lib1funcs.asm | 89 +++++++++++++++++++++++++++++++++
 gcc/config/xtensa/t-xtensa      |  1 +
 3 files changed, 98 insertions(+)

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 264e3f59da0..83dfcc3e73b 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,11 @@
+2007-06-08  Bob Wilson  <bob.wilson@acm.org>
+
+	* config/xtensa/lib1funcs.asm (__udivsi3): Use hardware divide
+	instructions if they are supported.
+	(__divsi3, __umodsi3, __modsi3): Likewise.
+	(__ashldi3, __ashrdi3, __lshrdi3): New.
+	* config/xtensa/t-xtensa (LIB1ASMFUNCS): Add DImode shift functions.
+	
 2007-06-08  Harsha Jagasia <harsha.jagasia@amd.com>
             Tony Linthicum <tony.linthicum@amd.com>
 
diff --git a/gcc/config/xtensa/lib1funcs.asm b/gcc/config/xtensa/lib1funcs.asm
index 76f072e5c89..27b67c43d6f 100644
--- a/gcc/config/xtensa/lib1funcs.asm
+++ b/gcc/config/xtensa/lib1funcs.asm
@@ -486,6 +486,9 @@ __ffssi2:
 	.type	__udivsi3, @function
 __udivsi3:
 	leaf_entry sp, 16
+#if XCHAL_HAVE_DIV32
+	quou	a2, a2, a3
+#else
 	bltui	a3, 2, .Lle_one	/* check if the divisor <= 1 */
 
 	mov	a6, a2		/* keep dividend in a6 */
@@ -539,6 +542,7 @@ __udivsi3:
 
 .Lreturn0:
 	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
 	leaf_return
 	.size	__udivsi3, . - __udivsi3
 
@@ -551,6 +555,9 @@ __udivsi3:
 	.type	__divsi3, @function
 __divsi3:
 	leaf_entry sp, 16
+#if XCHAL_HAVE_DIV32
+	quos	a2, a2, a3
+#else
 	xor	a7, a2, a3	/* sign = dividend ^ divisor */
 	do_abs	a6, a2, a4	/* udividend = abs (dividend) */
 	do_abs	a3, a3, a4	/* udivisor = abs (divisor) */
@@ -610,6 +617,7 @@ __divsi3:
 
 .Lreturn0:
 	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
 	leaf_return
 	.size	__divsi3, . - __divsi3
 
@@ -622,6 +630,9 @@ __divsi3:
 	.type	__umodsi3, @function
 __umodsi3:
 	leaf_entry sp, 16
+#if XCHAL_HAVE_DIV32
+	remu	a2, a2, a3
+#else
 	bltui	a3, 2, .Lle_one	/* check if the divisor is <= 1 */
 
 	do_nsau	a5, a2, a6, a7	/* dividend_shift = nsau (dividend) */
@@ -664,6 +675,7 @@ __umodsi3:
 
 .Lreturn0:
 	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
 	leaf_return
 	.size	__umodsi3, . - __umodsi3
 
@@ -676,6 +688,9 @@ __umodsi3:
 	.type	__modsi3, @function
 __modsi3:
 	leaf_entry sp, 16
+#if XCHAL_HAVE_DIV32
+	rems	a2, a2, a3
+#else
 	mov	a7, a2		/* save original (signed) dividend */
 	do_abs	a2, a2, a4	/* udividend = abs (dividend) */
 	do_abs	a3, a3, a4	/* udivisor = abs (divisor) */
@@ -723,10 +738,84 @@ __modsi3:
 
 .Lreturn0:
 	movi	a2, 0
+#endif /* XCHAL_HAVE_DIV32 */
 	leaf_return
 	.size	__modsi3, . - __modsi3
 
 #endif /* L_modsi3 */
 
+
+#ifdef __XTENSA_EB__
+#define uh a2
+#define ul a3
+#else
+#define uh a3
+#define ul a2
+#endif /* __XTENSA_EB__ */
+
+
+#ifdef L_ashldi3
+	.align	4
+	.global	__ashldi3
+	.type	__ashldi3, @function
+__ashldi3:
+	leaf_entry sp, 16
+	ssl	a4
+	bgei	a4, 32, .Llow_only
+	src	uh, uh, ul
+	sll	ul, ul
+	leaf_return
+
+.Llow_only:
+	sll	uh, ul
+	movi	ul, 0
+	leaf_return
+	.size	__ashldi3, . - __ashldi3
+
+#endif /* L_ashldi3 */
+
+
+#ifdef L_ashrdi3
+	.align	4
+	.global	__ashrdi3
+	.type	__ashrdi3, @function
+__ashrdi3:
+	leaf_entry sp, 16
+	ssr	a4
+	bgei	a4, 32, .Lhigh_only
+	src	ul, uh, ul
+	sra	uh, uh
+	leaf_return
+
+.Lhigh_only:
+	sra	ul, uh
+	srai	uh, uh, 31
+	leaf_return
+	.size	__ashrdi3, . - __ashrdi3
+
+#endif /* L_ashrdi3 */
+
+
+#ifdef L_lshrdi3
+	.align	4
+	.global	__lshrdi3
+	.type	__lshrdi3, @function
+__lshrdi3:
+	leaf_entry sp, 16
+	ssr	a4
+	bgei	a4, 32, .Lhigh_only1
+	src	ul, uh, ul
+	srl	uh, uh
+	leaf_return
+
+.Lhigh_only1:
+	srl	ul, uh
+	movi	uh, 0
+	leaf_return
+	.size	__lshrdi3, . - __lshrdi3
+
+#endif /* L_lshrdi3 */
+
+
 #include "ieee754-df.S"
 #include "ieee754-sf.S"
diff --git a/gcc/config/xtensa/t-xtensa b/gcc/config/xtensa/t-xtensa
index efcfe255f3b..5db4f7c66ce 100644
--- a/gcc/config/xtensa/t-xtensa
+++ b/gcc/config/xtensa/t-xtensa
@@ -1,6 +1,7 @@
 LIB1ASMSRC = xtensa/lib1funcs.asm
 LIB1ASMFUNCS = _mulsi3 _divsi3 _modsi3 _udivsi3 _umodsi3 \
 	_umulsidi3 _clz _clzsi2 _ctzsi2 _ffssi2 \
+	_ashldi3 _ashrdi3 _lshrdi3 \
 	_negsf2 _addsubsf3 _mulsf3 _divsf3 _cmpsf2 _fixsfsi _fixsfdi \
 	_fixunssfsi _fixunssfdi _floatsisf _floatunsisf \
 	_floatdisf _floatundisf \