diff options
Diffstat (limited to 'gcc-4.9/libgcc/config/microblaze/mulsi3.S')
| -rw-r--r-- | gcc-4.9/libgcc/config/microblaze/mulsi3.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/gcc-4.9/libgcc/config/microblaze/mulsi3.S b/gcc-4.9/libgcc/config/microblaze/mulsi3.S new file mode 100644 index 000000000..7e739a1e0 --- /dev/null +++ b/gcc-4.9/libgcc/config/microblaze/mulsi3.S @@ -0,0 +1,69 @@ +###################################-*-asm*- +# +# Copyright (C) 2009-2014 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/>. +# +# mulsi3.S +# +# Multiply operation for 32 bit integers. +# Input : Operand1 in Reg r5 +# Operand2 in Reg r6 +# Output: Result [op1 * op2] in Reg r3 +# +####################################### + + .globl __mulsi3 + .ent __mulsi3 + .type __mulsi3,@function +__mulsi3: + .frame r1,0,r15 + add r3,r0,r0 + BEQI r5,$L_Result_Is_Zero # Multiply by Zero + BEQI r6,$L_Result_Is_Zero # Multiply by Zero + BGEId r5,$L_R5_Pos + XOR r4,r5,r6 # Get the sign of the result + RSUBI r5,r5,0 # Make r5 positive +$L_R5_Pos: + BGEI r6,$L_R6_Pos + RSUBI r6,r6,0 # Make r6 positive +$L_R6_Pos: + bri $L1 +$L2: + add r5,r5,r5 +$L1: + srl r6,r6 + addc r7,r0,r0 + beqi r7,$L2 + bneid r6,$L2 + add r3,r3,r5 + blti r4,$L_NegateResult + rtsd r15,8 + nop +$L_NegateResult: + rtsd r15,8 + rsub r3,r3,r0 +$L_Result_Is_Zero: + rtsd r15,8 + addi r3,r0,0 + .end __mulsi3 + .size __mulsi3, . - __mulsi3 |