diff options
Diffstat (limited to 'newlib/libc/machine/hppa/strncmp.S')
| -rw-r--r-- | newlib/libc/machine/hppa/strncmp.S | 189 |
1 files changed, 0 insertions, 189 deletions
diff --git a/newlib/libc/machine/hppa/strncmp.S b/newlib/libc/machine/hppa/strncmp.S deleted file mode 100644 index 222384e..0000000 --- a/newlib/libc/machine/hppa/strncmp.S +++ /dev/null @@ -1,189 +0,0 @@ -/* - * (c) Copyright 1986 HEWLETT-PACKARD COMPANY - * - * To anyone who acknowledges that this file is provided "AS IS" - * without any express or implied warranty: - * permission to use, copy, modify, and distribute this file - * for any purpose is hereby granted without fee, provided that - * the above copyright notice and this notice appears in all - * copies, and that the name of Hewlett-Packard Company not be - * used in advertising or publicity pertaining to distribution - * of the software without specific, written prior permission. - * Hewlett-Packard Company makes no representations about the - * suitability of this software for any purpose. - */ - -/* strcmp(s1, s2) */ -/* returns integer: < 0 iff s1 lexicographically less than s2 */ -/* > 0 iff s1 lexicographically greater than s2 */ -/* = 0 iff s1 lexicographically equal to s2 */ -/* = 0 iff s1 lexicographically equal to s2 */ -/* quit after n charachters */ -#include "DEFS.h" - -#define s1 26 -#define s2 25 -#define tmp1 19 -#define s2word 20 -#define tmp3 21 -#define tmp7 22 -#define s1word 29 -#define save 1 -#define tmp6 23 -#define tmp5 28 -#define count 24 - -ENTRY(strncmp) - combt,<,n r0,count,search /* N <= 0 yields equality */ - bv r0(rp) /* */ - copy 0,ret0 /* return 0 (DELAY SLOT) */ -search: combf,=,n s1,s2,findout /* s1 != s2? */ - bv r0(rp) /* */ - copy 0,ret0 /* return 0 (delay slot) */ -findout: - comibf,=,n 0,s1,checks1 /* s1 == NULL? */ - ldbs 0(0,s2),ret0 /* */ - bv r0(rp) /* */ - subi 0,ret0,ret0 /* ret0 <- -*s2 */ -checks1: - comibf,=,n 0,s2,checkitout /* s2 == NULL? */ - bv r0(rp) /* */ - ldbs 0(0,s1),28 /* return *s1 */ - -checkitout: - extru s2,31,2,tmp1 /* Extract the low two bits of the s2. */ - extru s1,31,2,tmp5 /* Extract the low two bits of the s1 */ - sub,= tmp5,tmp1,tmp3 /* Are s1 & s2 aligned with each other? */ - b not_aligned /* It's more complicated (not_aligned) */ - dep 0,31,2,s1 /* Compute word address of s1 (DELAY SLOT) */ - dep 0,31,2,s2 /* Compute word address of s2 */ - ldwm 4(0,s1),s1word /* get next s1 word s1+=4 */ - combt,= tmp5,r0,skipmask /* skip masking, if we can */ - ldwm 4(0,s2),s2word /* get next s2 word s2+=4 (DELAY SLOT) */ - add tmp5,count,count /* bump count by the number of bytes */ - /* we are going to mask */ - sh3add tmp5,r0,save /* save now has number of bits to mask */ - mtctl save,11 - zvdepi -2,32,save /* load save with proper mask */ - or save,s1word,s1word /* mask s1word (s1) */ - or save,s2word,s2word /* mask s2word (s2) */ - - -skipmask: - combt,=,n s1word,s2word,chknulls /* are these words equal? */ - -checkbyte: - extru s1word,7,8,tmp3 /* get first byte (character) */ -ckbyte2: extru s2word,7,8,tmp7 /* get first byte (character) */ - combf,= tmp3,tmp7,done /* quit if first byte is not equal */ - sub tmp3,tmp7,ret0 /* return difference (delay slot) */ - comibt,=,n 0,tmp3,done /* have we reached the end of string */ - /* if so done ret0 already has zero */ - addibt,<=,n -1,count,done /* have we checked N chars? ret0 == 0 */ - extru s1word,15,8,tmp3 /* get second byte (character) */ - extru s2word,15,8,tmp7 /* get second byte (character) */ - combf,= tmp3,tmp7,done /* quit if second byte is not equal */ - sub tmp3,tmp7,ret0 /* return difference (delay slot) */ - comibt,=,n 0,tmp3,done /* have we reached the end of string */ - /* if so done ret0 already has zero */ - addibt,<=,n -1,count,done /* have we checked N chars? */ - extru s1word,23,8,tmp3 /* get third byte (character) */ - extru s2word,23,8,tmp7 /* get third byte (character) */ - combf,= tmp3,tmp7,done /* done if third byte is not equal */ - sub tmp3,tmp7,ret0 /* return difference (delay slot) */ - comibt,=,n 0,tmp3,done /* have we reached the end of string */ - /* if so done ret0 already has zero */ - addibt,<=,n -1,count,done /* have we checked N chars? */ - extru s1word,31,8,tmp3 /* get last byte (character) */ - extru s2word,31,8,tmp7 /* get last byte (character) */ - bv r0(rp) /* */ - sub tmp3,tmp7,ret0 /* the last characters in the word is */ - /* where the difference is, so return */ - /* the difference and we're outta here */ - - -chknulls: - addibt,<=,n -4,count,zero /* have we checked N chars? */ - uxor,nbz s1word,0,0 /* don't have to check s2 Just quit */ - bv r0(rp) /* */ - copy 0,28 /* return 0 */ - ldwm 4(0,s2),s2word /* get next s2 word s2+=4 */ - b skipmask /* keep checking */ - ldwm 4(0,s1),s1word /* get next s1 word s1+=4 */ - - -not_aligned: - dep r0,31,2,s2 /* Compute word address of s2 */ - combt,<,n r0,tmp3,shifts1 /* Do we shift s1 or s2 */ - sh3add tmp3,r0,tmp3 /* eight bits per byte so mul by 8 */ - ldwm 4(0,s1),s1word /* get first word of s1 */ - ldwm 4(0,s2),s2word /* get first word or s2 */ - combt,=,n r0,tmp5,masks2 /* Do we need to mask beginning of s1 */ - add tmp5,count,count /* bump count by the number of bytes */ - /* we are going to mask */ - sh3add tmp5,r0,save /* save now has number of bits to mask */ - mtctl save,11 - zvdepi -2,32,save /* load save with proper mask */ - or save,s1word,s1word /* */ -masks2: sh3add tmp1,r0,save /* save now has number of bits to mask */ - mtctl save,11 - zvdepi -2,32,save /* load save with proper mask */ - or save,s2word,s2word /* */ - mtctl tmp3,11 /* Move shift amount to CR11 */ -more: uxor,nbz s2word,r0,r0 /* Is there a null in first word */ - b,n chunk1 /* */ - ldwm 4(0,s2),tmp7 /* load second word to enable us to shift */ - vshd s2word,tmp7,s2word /* */ - combf,=,n s1word,s2word,ckbyte2 /* */ - extru s1word,7,8,tmp3 /* get first byte (DELAY SLOT) */ - addibt,<=,n -4,count,zero /* have we checked N chars? */ - uxor,nbz s1word,0,0 /* even though they're equal we could be done */ - b,n zero - copy tmp7,s2word /* */ - b more /* keep checking */ - ldwm 4(0,s1),s1word /* get next s1 (DELAY SLOT) */ - -chunk1: - vshd s2word,r0,s2word /* */ - b ckbyte2 /* */ - extru s1word,7,8,tmp3 /* */ - - -shifts1: - sh3add tmp3,r0,tmp3 /* eight bits per byte so mul by 4 */ - sub r0,tmp3,tmp3 /* Get negative value for left shift */ - ldwm 4(0,s2),s2word /* get first word of s2 */ - ldwm 4(0,s1),s1word /* get first word or s1 */ - combt,=,n r0,tmp1,masks1 /* Do we need to mask beginning of s2 */ - add tmp1,count,count /* bump count by the number of bytes */ - /* we are going to mask */ - sh3add tmp1,r0,save /* save now has number of bits to mask */ - mtctl save,11 - zvdepi -2,32,save /* load save with proper mask */ - or save,s2word,s2word /* */ -masks1: sh3add tmp5,r0,save /* save now has number of bits to mask */ - mtctl save,11 - zvdepi -2,32,save /* load save with proper mask */ - or save,s1word,s1word /* */ - mtctl tmp3,11 /* Move shift amount to CR11 */ -more1: uxor,nbz s1word,r0,r0 /* Is there a null in first byte */ - b,n chunk2 /* */ - ldwm 4(0,s1),tmp7 /* load second word to enable us to shift */ - vshd s1word,tmp7,s1word /* */ - combf,=,n s2word,s1word,ckbyte2 /* */ - extru s1word,7,8,tmp3 /* get first byte (DELAY SLOT) */ - addibt,<=,n -4,count,zero /* have we checked N chars? */ - uxor,nbz s2word,0,0 /* even though they're equal we could be done */ - b,n zero /* zero ret0 and quit */ - copy tmp7,s1word /* */ - b more1 /* keep checking */ - ldwm 4(0,s2),s2word /* get next s2 (DELAY SLOT) */ - -chunk2: - vshd s1word,r0,s1word /* */ - b ckbyte2 /* */ - extru s1word,7,8,tmp3 /* */ - -zero: copy r0,ret0 -done: -EXIT(strncmp) |