| /* MN10300 64-bit arithmetic right shift |
| * |
| * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. |
| * Written by David Howells (dhowells@redhat.com) |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public Licence |
| * as published by the Free Software Foundation; either version |
| * 2 of the Licence, or (at your option) any later version. |
| */ |
| #include <asm/cache.h> |
| |
| .text |
| .balign L1_CACHE_BYTES |
| |
| ############################################################################### |
| # |
| # unsigned long long __ashrdi3(unsigned long long value [D1:D0], |
| # unsigned by [(12,SP)]) |
| # |
| ############################################################################### |
| .globl __ashrdi3 |
| .type __ashrdi3,@function |
| __ashrdi3: |
| mov (12,sp),a0 |
| and +63,a0 |
| beq __ashrdi3_zero |
| |
| cmp +31,a0 |
| bhi __ashrdi3_32plus |
| |
| # the count is in the range 1-31 |
| lsr a0,d0 |
| |
| mov +32,a1 |
| sub a0,a1,a1 # a1 = 32 - count |
| asl a1,d1,a1 # get underflow from MSW -> LSW |
| |
| or_asr a1,d0,a0,d1 # insert underflow into LSW and |
| # shift the MSW |
| rets |
| |
| .balign L1_CACHE_BYTES |
| # the count is in the range 32-63 |
| __ashrdi3_32plus: |
| asr a0,d1,d0 |
| ext d0 # sign-extend result through MDR |
| mov mdr,d1 |
| __ashrdi3_zero: |
| rets |
| |
| .size __ashrdi3, .-__ashrdi3 |