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-rw-r--r--arch/ia64/lib/ip_fast_csum.S148
1 files changed, 0 insertions, 148 deletions
diff --git a/arch/ia64/lib/ip_fast_csum.S b/arch/ia64/lib/ip_fast_csum.S
deleted file mode 100644
index fcc0b812ce2e..000000000000
--- a/arch/ia64/lib/ip_fast_csum.S
+++ /dev/null
@@ -1,148 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-/*
- * Optmized version of the ip_fast_csum() function
- * Used for calculating IP header checksum
- *
- * Return: 16bit checksum, complemented
- *
- * Inputs:
- * in0: address of buffer to checksum (char *)
- * in1: length of the buffer (int)
- *
- * Copyright (C) 2002, 2006 Intel Corp.
- * Copyright (C) 2002, 2006 Ken Chen <kenneth.w.chen@intel.com>
- */
-
-#include <linux/export.h>
-#include <asm/asmmacro.h>
-
-/*
- * Since we know that most likely this function is called with buf aligned
- * on 4-byte boundary and 20 bytes in length, we can execution rather quickly
- * versus calling generic version of do_csum, which has lots of overhead in
- * handling various alignments and sizes. However, due to lack of constrains
- * put on the function input argument, cases with alignment not on 4-byte or
- * size not equal to 20 bytes will be handled by the generic do_csum function.
- */
-
-#define in0 r32
-#define in1 r33
-#define in2 r34
-#define in3 r35
-#define in4 r36
-#define ret0 r8
-
-GLOBAL_ENTRY(ip_fast_csum)
- .prologue
- .body
- cmp.ne p6,p7=5,in1 // size other than 20 byte?
- and r14=3,in0 // is it aligned on 4-byte?
- add r15=4,in0 // second source pointer
- ;;
- cmp.ne.or.andcm p6,p7=r14,r0
- ;;
-(p7) ld4 r20=[in0],8
-(p7) ld4 r21=[r15],8
-(p6) br.spnt .generic
- ;;
- ld4 r22=[in0],8
- ld4 r23=[r15],8
- ;;
- ld4 r24=[in0]
- add r20=r20,r21
- add r22=r22,r23
- ;;
- add r20=r20,r22
- ;;
- add r20=r20,r24
- ;;
- shr.u ret0=r20,16 // now need to add the carry
- zxt2 r20=r20
- ;;
- add r20=ret0,r20
- ;;
- shr.u ret0=r20,16 // add carry again
- zxt2 r20=r20
- ;;
- add r20=ret0,r20
- ;;
- shr.u ret0=r20,16
- zxt2 r20=r20
- ;;
- add r20=ret0,r20
- mov r9=0xffff
- ;;
- andcm ret0=r9,r20
- .restore sp // reset frame state
- br.ret.sptk.many b0
- ;;
-
-.generic:
- .prologue
- .save ar.pfs, r35
- alloc r35=ar.pfs,2,2,2,0
- .save rp, r34
- mov r34=b0
- .body
- dep.z out1=in1,2,30
- mov out0=in0
- ;;
- br.call.sptk.many b0=do_csum
- ;;
- andcm ret0=-1,ret0
- mov ar.pfs=r35
- mov b0=r34
- br.ret.sptk.many b0
-END(ip_fast_csum)
-EXPORT_SYMBOL(ip_fast_csum)
-
-GLOBAL_ENTRY(csum_ipv6_magic)
- ld4 r20=[in0],4
- ld4 r21=[in1],4
- zxt4 in2=in2
- ;;
- ld4 r22=[in0],4
- ld4 r23=[in1],4
- dep r15=in3,in2,32,16
- ;;
- ld4 r24=[in0],4
- ld4 r25=[in1],4
- mux1 r15=r15,@rev
- add r16=r20,r21
- add r17=r22,r23
- zxt4 in4=in4
- ;;
- ld4 r26=[in0],4
- ld4 r27=[in1],4
- shr.u r15=r15,16
- add r18=r24,r25
- add r8=r16,r17
- ;;
- add r19=r26,r27
- add r8=r8,r18
- ;;
- add r8=r8,r19
- add r15=r15,in4
- ;;
- add r8=r8,r15
- ;;
- shr.u r10=r8,32 // now fold sum into short
- zxt4 r11=r8
- ;;
- add r8=r10,r11
- ;;
- shr.u r10=r8,16 // yeah, keep it rolling
- zxt2 r11=r8
- ;;
- add r8=r10,r11
- ;;
- shr.u r10=r8,16 // three times lucky
- zxt2 r11=r8
- ;;
- add r8=r10,r11
- mov r9=0xffff
- ;;
- andcm r8=r9,r8
- br.ret.sptk.many b0
-END(csum_ipv6_magic)
-EXPORT_SYMBOL(csum_ipv6_magic)