From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- libgcc/config/microblaze/divsi3.asm | 96 +++++++++++++++++++++++++++++++++++++ 1 file changed, 96 insertions(+) create mode 100644 libgcc/config/microblaze/divsi3.asm (limited to 'libgcc/config/microblaze/divsi3.asm') diff --git a/libgcc/config/microblaze/divsi3.asm b/libgcc/config/microblaze/divsi3.asm new file mode 100644 index 000000000..7d888b32e --- /dev/null +++ b/libgcc/config/microblaze/divsi3.asm @@ -0,0 +1,96 @@ +###################################- +# +# Copyright 2009, 2010 Free Software Foundation, Inc. +# +# Contributed by Michael Eager . +# +# 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 +# . +# +# divsi3.asm +# +# Divide operation for 32 bit integers. +# Input : Dividend in Reg r5 +# Divisor in Reg r6 +# Output: Result in Reg r3 +# +####################################### + + .globl __divsi3 + .ent __divsi3 + .type __divsi3,@function +__divsi3: + .frame r1,0,r15 + + ADDIK r1,r1,-16 + SWI r28,r1,0 + SWI r29,r1,4 + SWI r30,r1,8 + SWI r31,r1,12 + + BEQI r6,$LaDiv_By_Zero # Div_by_Zero # Division Error + BEQI r5,$LaResult_Is_Zero # Result is Zero + BGEID r5,$LaR5_Pos + XOR r28,r5,r6 # Get the sign of the result + RSUBI r5,r5,0 # Make r5 positive +$LaR5_Pos: + BGEI r6,$LaR6_Pos + RSUBI r6,r6,0 # Make r6 positive +$LaR6_Pos: + ADDIK r30,r0,0 # Clear mod + ADDIK r3,r0,0 # clear div + ADDIK r29,r0,32 # Initialize the loop count + + # First part try to find the first '1' in the r5 +$LaDIV0: + BLTI r5,$LaDIV2 # This traps r5 == 0x80000000 +$LaDIV1: + ADD r5,r5,r5 # left shift logical r5 + BGTID r5,$LaDIV1 + ADDIK r29,r29,-1 +$LaDIV2: + ADD r5,r5,r5 # left shift logical r5 get the '1' into the Carry + ADDC r30,r30,r30 # Move that bit into the Mod register + RSUB r31,r6,r30 # Try to subtract (r30 a r6) + BLTI r31,$LaMOD_TOO_SMALL + OR r30,r0,r31 # Move the r31 to mod since the result was positive + ADDIK r3,r3,1 +$LaMOD_TOO_SMALL: + ADDIK r29,r29,-1 + BEQi r29,$LaLOOP_END + ADD r3,r3,r3 # Shift in the '1' into div + BRI $LaDIV2 # Div2 +$LaLOOP_END: + BGEI r28,$LaRETURN_HERE + BRID $LaRETURN_HERE + RSUBI r3,r3,0 # Negate the result +$LaDiv_By_Zero: +$LaResult_Is_Zero: + OR r3,r0,r0 # set result to 0 +$LaRETURN_HERE: +# Restore values of CSRs and that of r3 and the divisor and the dividend + LWI r28,r1,0 + LWI r29,r1,4 + LWI r30,r1,8 + LWI r31,r1,12 + RTSD r15,8 + ADDIK r1,r1,16 +.end __divsi3 + .size __divsi3, . - __divsi3 + -- cgit v1.2.3