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Diffstat (limited to 'arch/sh/lib/lshiftrt.S')
| -rw-r--r-- | arch/sh/lib/lshiftrt.S | 192 |
1 files changed, 192 insertions, 0 deletions
diff --git a/arch/sh/lib/lshiftrt.S b/arch/sh/lib/lshiftrt.S new file mode 100644 index 0000000..e6fc1cf --- /dev/null +++ b/arch/sh/lib/lshiftrt.S @@ -0,0 +1,192 @@ +/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, + 2004, 2005, 2006 + Free Software Foundation, Inc. + +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 2, or (at your option) any +later version. + +In addition to the permissions in the GNU General Public License, the +Free Software Foundation gives you unlimited permission to link the +compiled version of this file into combinations with other programs, +and to distribute those combinations without any restriction coming +from the use of this file. (The General Public License restrictions +do apply in other respects; for example, they cover modification of +the file, and distribution when not linked into a combine +executable.) + +This file 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. + +You should have received a copy of the GNU General Public License +along with this program; see the file COPYING. If not, write to +the Free Software Foundation, 51 Franklin Street, Fifth Floor, +Boston, MA 02110-1301, USA. */ + +!! libgcc routines for the Renesas / SuperH SH CPUs. +!! Contributed by Steve Chamberlain. +!! sac@cygnus.com + +!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines +!! recoded in assembly by Toshiyasu Morita +!! tm@netcom.com + +/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and + ELF local label prefixes by J"orn Rennecke + amylaar@cygnus.com */ + +! +! __lshrsi3) +! +! Entry: +! +! r4: Value to shift +! r5: Shifts +! +! Exit: +! +! r0: Result +! +! Destroys: +! +! (none) +! + .global __lshrsi3 + .align 2 +__lshrsi3: + mov #31,r0 + and r0,r5 + mova __lshrsi3_table,r0 + mov.b @(r0,r5),r5 +#ifdef __sh1__ + add r5,r0 + jmp @r0 +#else + braf r5 +#endif + mov r4,r0 + + .align 2 +__lshrsi3_table: + .byte __lshrsi3_0-__lshrsi3_table + .byte __lshrsi3_1-__lshrsi3_table + .byte __lshrsi3_2-__lshrsi3_table + .byte __lshrsi3_3-__lshrsi3_table + .byte __lshrsi3_4-__lshrsi3_table + .byte __lshrsi3_5-__lshrsi3_table + .byte __lshrsi3_6-__lshrsi3_table + .byte __lshrsi3_7-__lshrsi3_table + .byte __lshrsi3_8-__lshrsi3_table + .byte __lshrsi3_9-__lshrsi3_table + .byte __lshrsi3_10-__lshrsi3_table + .byte __lshrsi3_11-__lshrsi3_table + .byte __lshrsi3_12-__lshrsi3_table + .byte __lshrsi3_13-__lshrsi3_table + .byte __lshrsi3_14-__lshrsi3_table + .byte __lshrsi3_15-__lshrsi3_table + .byte __lshrsi3_16-__lshrsi3_table + .byte __lshrsi3_17-__lshrsi3_table + .byte __lshrsi3_18-__lshrsi3_table + .byte __lshrsi3_19-__lshrsi3_table + .byte __lshrsi3_20-__lshrsi3_table + .byte __lshrsi3_21-__lshrsi3_table + .byte __lshrsi3_22-__lshrsi3_table + .byte __lshrsi3_23-__lshrsi3_table + .byte __lshrsi3_24-__lshrsi3_table + .byte __lshrsi3_25-__lshrsi3_table + .byte __lshrsi3_26-__lshrsi3_table + .byte __lshrsi3_27-__lshrsi3_table + .byte __lshrsi3_28-__lshrsi3_table + .byte __lshrsi3_29-__lshrsi3_table + .byte __lshrsi3_30-__lshrsi3_table + .byte __lshrsi3_31-__lshrsi3_table + +__lshrsi3_6: + shlr2 r0 +__lshrsi3_4: + shlr2 r0 +__lshrsi3_2: + rts + shlr2 r0 + +__lshrsi3_7: + shlr2 r0 +__lshrsi3_5: + shlr2 r0 +__lshrsi3_3: + shlr2 r0 +__lshrsi3_1: + rts + shlr r0 + +__lshrsi3_14: + shlr2 r0 +__lshrsi3_12: + shlr2 r0 +__lshrsi3_10: + shlr2 r0 +__lshrsi3_8: + rts + shlr8 r0 + +__lshrsi3_15: + shlr2 r0 +__lshrsi3_13: + shlr2 r0 +__lshrsi3_11: + shlr2 r0 +__lshrsi3_9: + shlr8 r0 + rts + shlr r0 + +__lshrsi3_22: + shlr2 r0 +__lshrsi3_20: + shlr2 r0 +__lshrsi3_18: + shlr2 r0 +__lshrsi3_16: + rts + shlr16 r0 + +__lshrsi3_23: + shlr2 r0 +__lshrsi3_21: + shlr2 r0 +__lshrsi3_19: + shlr2 r0 +__lshrsi3_17: + shlr16 r0 + rts + shlr r0 + +__lshrsi3_30: + shlr2 r0 +__lshrsi3_28: + shlr2 r0 +__lshrsi3_26: + shlr2 r0 +__lshrsi3_24: + shlr16 r0 + rts + shlr8 r0 + +__lshrsi3_31: + shlr2 r0 +__lshrsi3_29: + shlr2 r0 +__lshrsi3_27: + shlr2 r0 +__lshrsi3_25: + shlr16 r0 + shlr8 r0 + rts + shlr r0 + +__lshrsi3_0: + rts + nop |
