diff options
Diffstat (limited to 'arch/frv/lib/memset.S')
| -rw-r--r-- | arch/frv/lib/memset.S | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/arch/frv/lib/memset.S b/arch/frv/lib/memset.S deleted file mode 100644 index 55a35263cbe37..0000000000000 --- a/arch/frv/lib/memset.S +++ /dev/null @@ -1,182 +0,0 @@ -/* memset.S: optimised assembly memset - * - * 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 - -############################################################################### -# -# void *memset(void *p, char ch, size_t count) -# -# - NOTE: must not use any stack. exception detection performs function return -# to caller's fixup routine, aborting the remainder of the set -# GR4, GR7, GR8, and GR11 must be managed -# -############################################################################### - .globl memset,__memset_end - .type memset,@function -memset: - orcc.p gr10,gr0,gr5,icc3 ; GR5 = count - andi gr9,#0xff,gr9 - or.p gr8,gr0,gr4 ; GR4 = address - beqlr icc3,#0 - - # conditionally write a byte to 2b-align the address - setlos.p #1,gr6 - andicc gr4,#1,gr0,icc0 - ckne icc0,cc7 - cstb.p gr9,@(gr4,gr0) ,cc7,#1 - csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3 - cadd.p gr4,gr6,gr4 ,cc7,#1 - beqlr icc3,#0 - - # conditionally write a word to 4b-align the address - andicc.p gr4,#2,gr0,icc0 - subicc gr5,#2,gr0,icc1 - setlos.p #2,gr6 - ckne icc0,cc7 - slli.p gr9,#8,gr12 ; need to double up the pattern - cknc icc1,cc5 - or.p gr9,gr12,gr12 - andcr cc7,cc5,cc7 - - csth.p gr12,@(gr4,gr0) ,cc7,#1 - csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3 - cadd.p gr4,gr6,gr4 ,cc7,#1 - beqlr icc3,#0 - - # conditionally write a dword to 8b-align the address - andicc.p gr4,#4,gr0,icc0 - subicc gr5,#4,gr0,icc1 - setlos.p #4,gr6 - ckne icc0,cc7 - slli.p gr12,#16,gr13 ; need to quadruple-up the pattern - cknc icc1,cc5 - or.p gr13,gr12,gr12 - andcr cc7,cc5,cc7 - - cst.p gr12,@(gr4,gr0) ,cc7,#1 - csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3 - cadd.p gr4,gr6,gr4 ,cc7,#1 - beqlr icc3,#0 - - or.p gr12,gr12,gr13 ; need to octuple-up the pattern - - # the address is now 8b-aligned - loop around writing 64b chunks - setlos #8,gr7 - subi.p gr4,#8,gr4 ; store with update index does weird stuff - setlos #64,gr6 - - subicc gr5,#64,gr0,icc0 -0: cknc icc0,cc7 - cstdu gr12,@(gr4,gr7) ,cc7,#1 - cstdu gr12,@(gr4,gr7) ,cc7,#1 - cstdu gr12,@(gr4,gr7) ,cc7,#1 - cstdu gr12,@(gr4,gr7) ,cc7,#1 - cstdu gr12,@(gr4,gr7) ,cc7,#1 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - subicc gr5,#64,gr0,icc0 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - beqlr icc3,#0 - bnc icc0,#2,0b - - # now do 32-byte remnant - subicc.p gr5,#32,gr0,icc0 - setlos #32,gr6 - cknc icc0,cc7 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - setlos #16,gr6 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - subicc gr5,#16,gr0,icc0 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - beqlr icc3,#0 - - # now do 16-byte remnant - cknc icc0,cc7 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - csubcc gr5,gr6,gr5 ,cc7,#1 ; also set ICC3 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - beqlr icc3,#0 - - # now do 8-byte remnant - subicc gr5,#8,gr0,icc1 - cknc icc1,cc7 - cstdu.p gr12,@(gr4,gr7) ,cc7,#1 - csubcc gr5,gr7,gr5 ,cc7,#1 ; also set ICC3 - setlos.p #4,gr7 - beqlr icc3,#0 - - # now do 4-byte remnant - subicc gr5,#4,gr0,icc0 - addi.p gr4,#4,gr4 - cknc icc0,cc7 - cstu.p gr12,@(gr4,gr7) ,cc7,#1 - csubcc gr5,gr7,gr5 ,cc7,#1 ; also set ICC3 - subicc.p gr5,#2,gr0,icc1 - beqlr icc3,#0 - - # now do 2-byte remnant - setlos #2,gr7 - addi.p gr4,#2,gr4 - cknc icc1,cc7 - csthu.p gr12,@(gr4,gr7) ,cc7,#1 - csubcc gr5,gr7,gr5 ,cc7,#1 ; also set ICC3 - subicc.p gr5,#1,gr0,icc0 - beqlr icc3,#0 - - # now do 1-byte remnant - setlos #0,gr7 - addi.p gr4,#2,gr4 - cknc icc0,cc7 - cstb.p gr12,@(gr4,gr0) ,cc7,#1 - bralr -__memset_end: - - .size memset, __memset_end-memset - -############################################################################### -# -# clear memory in userspace -# - return the number of bytes that could not be cleared (0 on complete success) -# -# long __memset_user(void *p, size_t count) -# -############################################################################### - .globl __memset_user, __memset_user_error_lr, __memset_user_error_handler - .type __memset_user,@function -__memset_user: - movsg lr,gr11 - - # abuse memset to do the dirty work - or.p gr9,gr9,gr10 - setlos #0,gr9 - call memset -__memset_user_error_lr: - jmpl.p @(gr11,gr0) - setlos #0,gr8 - - # deal any exception generated by memset - # GR4 - memset's address tracking pointer - # GR7 - memset's step value (index register for store insns) - # GR8 - memset's original start address - # GR10 - memset's original count -__memset_user_error_handler: - add.p gr4,gr7,gr4 - add gr8,gr10,gr8 - jmpl.p @(gr11,gr0) - sub gr8,gr4,gr8 ; we return the amount left uncleared - - .size __memset_user, .-__memset_user |