diff options
Diffstat (limited to 'arch/mn10300/kernel/fpu-low.S')
| -rw-r--r-- | arch/mn10300/kernel/fpu-low.S | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/arch/mn10300/kernel/fpu-low.S b/arch/mn10300/kernel/fpu-low.S new file mode 100644 index 00000000000..96cfd47e68d --- /dev/null +++ b/arch/mn10300/kernel/fpu-low.S @@ -0,0 +1,197 @@ +/* MN10300 Low level FPU management operations + * + * 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/cpu-regs.h> + +############################################################################### +# +# void fpu_init_state(void) +# - initialise the FPU +# +############################################################################### + .globl fpu_init_state + .type fpu_init_state,@function +fpu_init_state: + mov epsw,d0 + or EPSW_FE,epsw + +#ifdef CONFIG_MN10300_PROC_MN103E010 + nop + nop + nop +#endif + fmov 0,fs0 + fmov fs0,fs1 + fmov fs0,fs2 + fmov fs0,fs3 + fmov fs0,fs4 + fmov fs0,fs5 + fmov fs0,fs6 + fmov fs0,fs7 + fmov fs0,fs8 + fmov fs0,fs9 + fmov fs0,fs10 + fmov fs0,fs11 + fmov fs0,fs12 + fmov fs0,fs13 + fmov fs0,fs14 + fmov fs0,fs15 + fmov fs0,fs16 + fmov fs0,fs17 + fmov fs0,fs18 + fmov fs0,fs19 + fmov fs0,fs20 + fmov fs0,fs21 + fmov fs0,fs22 + fmov fs0,fs23 + fmov fs0,fs24 + fmov fs0,fs25 + fmov fs0,fs26 + fmov fs0,fs27 + fmov fs0,fs28 + fmov fs0,fs29 + fmov fs0,fs30 + fmov fs0,fs31 + fmov FPCR_INIT,fpcr + +#ifdef CONFIG_MN10300_PROC_MN103E010 + nop + nop + nop +#endif + mov d0,epsw + ret [],0 + + .size fpu_init_state,.-fpu_init_state + +############################################################################### +# +# void fpu_save(struct fpu_state_struct *) +# - save the fpu state +# - note that an FPU Operational exception might occur during this process +# +############################################################################### + .globl fpu_save + .type fpu_save,@function +fpu_save: + mov epsw,d1 + or EPSW_FE,epsw /* enable the FPU so we can access it */ + +#ifdef CONFIG_MN10300_PROC_MN103E010 + nop + nop +#endif + mov d0,a0 + fmov fs0,(a0+) + fmov fs1,(a0+) + fmov fs2,(a0+) + fmov fs3,(a0+) + fmov fs4,(a0+) + fmov fs5,(a0+) + fmov fs6,(a0+) + fmov fs7,(a0+) + fmov fs8,(a0+) + fmov fs9,(a0+) + fmov fs10,(a0+) + fmov fs11,(a0+) + fmov fs12,(a0+) + fmov fs13,(a0+) + fmov fs14,(a0+) + fmov fs15,(a0+) + fmov fs16,(a0+) + fmov fs17,(a0+) + fmov fs18,(a0+) + fmov fs19,(a0+) + fmov fs20,(a0+) + fmov fs21,(a0+) + fmov fs22,(a0+) + fmov fs23,(a0+) + fmov fs24,(a0+) + fmov fs25,(a0+) + fmov fs26,(a0+) + fmov fs27,(a0+) + fmov fs28,(a0+) + fmov fs29,(a0+) + fmov fs30,(a0+) + fmov fs31,(a0+) + fmov fpcr,d0 + mov d0,(a0) +#ifdef CONFIG_MN10300_PROC_MN103E010 + nop + nop +#endif + + mov d1,epsw + ret [],0 + + .size fpu_save,.-fpu_save + +############################################################################### +# +# void fpu_restore(struct fpu_state_struct *) +# - restore the fpu state +# - note that an FPU Operational exception might occur during this process +# +############################################################################### + .globl fpu_restore + .type fpu_restore,@function +fpu_restore: + mov epsw,d1 + or EPSW_FE,epsw /* enable the FPU so we can access it */ + +#ifdef CONFIG_MN10300_PROC_MN103E010 + nop + nop +#endif + mov d0,a0 + fmov (a0+),fs0 + fmov (a0+),fs1 + fmov (a0+),fs2 + fmov (a0+),fs3 + fmov (a0+),fs4 + fmov (a0+),fs5 + fmov (a0+),fs6 + fmov (a0+),fs7 + fmov (a0+),fs8 + fmov (a0+),fs9 + fmov (a0+),fs10 + fmov (a0+),fs11 + fmov (a0+),fs12 + fmov (a0+),fs13 + fmov (a0+),fs14 + fmov (a0+),fs15 + fmov (a0+),fs16 + fmov (a0+),fs17 + fmov (a0+),fs18 + fmov (a0+),fs19 + fmov (a0+),fs20 + fmov (a0+),fs21 + fmov (a0+),fs22 + fmov (a0+),fs23 + fmov (a0+),fs24 + fmov (a0+),fs25 + fmov (a0+),fs26 + fmov (a0+),fs27 + fmov (a0+),fs28 + fmov (a0+),fs29 + fmov (a0+),fs30 + fmov (a0+),fs31 + mov (a0),d0 + fmov d0,fpcr +#ifdef CONFIG_MN10300_PROC_MN103E010 + nop + nop + nop +#endif + + mov d1,epsw + ret [],0 + + .size fpu_restore,.-fpu_restore |