diff options
Diffstat (limited to 'kernel/arch/frv/lib/__ashrdi3.S')
| -rw-r--r-- | kernel/arch/frv/lib/__ashrdi3.S | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/kernel/arch/frv/lib/__ashrdi3.S b/kernel/arch/frv/lib/__ashrdi3.S new file mode 100644 index 000000000..5742665bf --- /dev/null +++ b/kernel/arch/frv/lib/__ashrdi3.S @@ -0,0 +1,41 @@ +/* __ashrdi3.S: 64-bit arithmetic shift right + * + * Copyright (C) 2003 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 License + * as published by the Free Software Foundation; either version + * 2 of the License, or (at your option) any later version. + */ + + .text + .p2align 4 + +############################################################################### +# +# signed long long __ashrdi3(signed long long value [GR8:GR9], unsigned by [GR10]) +# +############################################################################### + .globl __ashrdi3 + .type __ashrdi3,@function +__ashrdi3: + andicc.p gr10,#63,gr10,icc0 + setlos #32,gr5 + andicc.p gr10,#32,gr0,icc1 + beqlr icc0,#0 + setlos.p #31,gr6 + ckeq icc1,cc4 ; cc4 is true if 0<N<32 + + # deal with a shift in the range 1<=N<=31 + csrl.p gr9,gr10,gr9 ,cc4,#1 ; LSW >>= N + csub gr5,gr10,gr5 ,cc4,#1 ; M = 32 - N + csll.p gr8,gr5,gr4 ,cc4,#1 + csra gr8,gr10,gr8 ,cc4,#1 ; MSW >>= N + cor.p gr4,gr9,gr9 ,cc4,#1 ; LSW |= MSW << M + + # deal with a shift in the range 32<=N<=63 + csra gr8,gr10,gr9 ,cc4,#0 ; LSW = MSW >> (N & 31 [implicit AND]) + csra.p gr8,gr6,gr8 ,cc4,#0 ; MSW >>= 31 + bralr + .size __ashrdi3, .-__ashrdi3 |