meta-xilinx/meta-xilinx-bsp/recipes-microblaze/gcc/gcc-8/0016-Patch-microblaze-Removed-moddi3-routinue.patch

From 640628680ff6f028ad6d5fef2e41da29664f036f Mon Sep 17 00:00:00 2001
From: Mahesh Bodapati <mbodapat@xilinx.com>
Date: Thu, 12 Jan 2017 17:36:16 +0530
Subject: [PATCH 16/54] [Patch, microblaze]: Removed moddi3 routinue Using the
 default moddi3 function as the existing implementation has many bugs

Signed-off-by:Nagaraju <nmekala@xilix.com>
---
 libgcc/config/microblaze/moddi3.S     | 121 ----------------------------------
 libgcc/config/microblaze/t-microblaze |   3 +-
 2 files changed, 1 insertion(+), 123 deletions(-)
 delete mode 100644 libgcc/config/microblaze/moddi3.S

diff --git a/libgcc/config/microblaze/moddi3.S b/libgcc/config/microblaze/moddi3.S
deleted file mode 100644
index a8f17d7..0000000
--- a/libgcc/config/microblaze/moddi3.S
+++ /dev/null
@@ -1,121 +0,0 @@
-###################################
-# 
-#  Copyright (C) 2009-2018 Free Software Foundation, Inc.
-#
-#  Contributed by Michael Eager <eager@eagercon.com>.
-#
-#  This file is free software; you can redistribute it and/or modify it
-#  under the terms of the GNU General Public License as published by the
-#  Free Software Foundation; either version 3, or (at your option) any
-#  later version.
-#
-#  GCC is distributed in the hope that it will be useful, but WITHOUT
-#  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
-#  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public
-#  License for more details.
-#
-#  Under Section 7 of GPL version 3, you are granted additional
-#  permissions described in the GCC Runtime Library Exception, version
-#  3.1, as published by the Free Software Foundation.
-#
-#  You should have received a copy of the GNU General Public License and
-#  a copy of the GCC Runtime Library Exception along with this program;
-#  see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
-#  <http://www.gnu.org/licenses/>. 
-#
-#  modsi3.S
-# 
-#  modulo operation for 64 bit integers.
-# 
-#######################################
-
-
-/* An executable stack is *not* required for these functions.  */
-#ifdef __linux__
-.section .note.GNU-stack,"",%progbits
-.previous
-#endif
-
-	.globl	__moddi3
-	.ent	__moddi3
-__moddi3:
-	.frame	r1,0,r15	
-
-#Change the stack pointer value and Save callee saved regs
-	addik	r1,r1,-24
-	swi	r25,r1,0
-	swi	r26,r1,4
-	swi	r27,r1,8	# used for sign
-	swi	r28,r1,12	# used for loop count
-	swi	r29,r1,16	# Used for div value High
-	swi	r30,r1,20	# Used for div value Low
-
-#Check for Zero Value in the divisor/dividend
-	OR	r9,r5,r6			# Check for the op1 being zero
-	BEQID	r9,$LaResult_Is_Zero		# Result is zero
-	OR	r9,r7,r8			# Check for the dividend being zero
-	BEQI	r9,$LaDiv_By_Zero	        # Div_by_Zero   # Division Error
-	BGEId	r5,$La1_Pos 
-	XOR	r27,r5,r7			# Get the sign of the result
-	RSUBI	r6,r6,0				# Make dividend positive
-	RSUBIC	r5,r5,0				# Make dividend positive
-$La1_Pos:
-	BGEI	r7,$La2_Pos
-	RSUBI	r8,r8,0				# Make Divisor Positive
-	RSUBIC	r9,r9,0				# Make Divisor Positive
-$La2_Pos:
-	ADDIK	r4,r0,0				# Clear mod low
-	ADDIK	r3,r0,0                	        # Clear mod high
-	ADDIK	r29,r0,0			# clear div high
-	ADDIK	r30,r0,0			# clear div low
-	ADDIK	r28,r0,64			# Initialize the loop count
-   # First part try to find the first '1' in the r5/r6
-$LaDIV1:
-	ADD	r6,r6,r6
-	ADDC	r5,r5,r5			# left shift logical r5
-	BGEID	r5,$LaDIV1			
-	ADDIK	r28,r28,-1
-$LaDIV2:
-	ADD	r6,r6,r6
-	ADDC	r5,r5,r5	# left shift logical r5/r6 get the '1' into the Carry
-	ADDC	r4,r4,r4	# Move that bit into the Mod register
-	ADDC	r3,r3,r3	# Move carry into high mod register
-	rsub	r18,r7,r3	# Compare the High Parts of Mod and Divisor
-	bnei	r18,$L_High_EQ
-	rsub	r18,r6,r4	# Compare Low Parts only if Mod[h] == Divisor[h]
-$L_High_EQ:	
-	rSUB	r26,r8,r4	# Subtract divisor[L] from Mod[L]
-	rsubc	r25,r7,r3	# Subtract divisor[H] from Mod[H]
-	BLTi	r25,$LaMOD_TOO_SMALL
-	OR	r3,r0,r25	# move r25 to mod [h]
-	OR	r4,r0,r26	# move r26 to mod [l]
-	ADDI	r30,r30,1
-	ADDC	r29,r29,r0
-$LaMOD_TOO_SMALL:
-	ADDIK	r28,r28,-1
-	BEQi	r28,$LaLOOP_END
-	ADD	r30,r30,r30		# Shift in the '1' into div [low]
-	ADDC	r29,r29,r29		# Move the carry generated into high
-	BRI	$LaDIV2   # Div2
-$LaLOOP_END:
-	BGEI	r27,$LaRETURN_HERE
-	rsubi	r30,r30,0
-	rsubc	r29,r29,r0
-	BRI	$LaRETURN_HERE
-$LaDiv_By_Zero:
-$LaResult_Is_Zero:
-	or	r29,r0,r0	# set result to 0 [High]
-	or	r30,r0,r0	# set result to 0 [Low]
-$LaRETURN_HERE:
-# Restore values of CSRs and that of r29 and the divisor and the dividend
-	
-	lwi	r25,r1,0
-	lwi	r26,r1,4
-	lwi	r27,r1,8
-	lwi	r28,r1,12
-	lwi	r29,r1,16
-	lwi	r30,r1,20
-	rtsd	r15,8
-	addik r1,r1,24
-        .end __moddi3
-	
diff --git a/libgcc/config/microblaze/t-microblaze b/libgcc/config/microblaze/t-microblaze
index 96959f0..8d954a4 100644
--- a/libgcc/config/microblaze/t-microblaze
+++ b/libgcc/config/microblaze/t-microblaze
@@ -1,8 +1,7 @@
-LIB2FUNCS_EXCLUDE += _divsi3 _modsi3 _moddi3 _mulsi3 _udivsi3 _umodsi3
+LIB2FUNCS_EXCLUDE += _divsi3 _modsi3 _mulsi3 _udivsi3 _umodsi3
 
 LIB2ADD += \
         $(srcdir)/config/microblaze/divsi3.S \
-        $(srcdir)/config/microblaze/moddi3.S \
         $(srcdir)/config/microblaze/modsi3.S \
         $(srcdir)/config/microblaze/muldi3_hard.S \
         $(srcdir)/config/microblaze/mulsi3.S \
-- 
2.7.4