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Diffstat (limited to 'newlib/libc/machine/hppa/memcmp.S')
| -rw-r--r-- | newlib/libc/machine/hppa/memcmp.S | 183 |
1 files changed, 0 insertions, 183 deletions
diff --git a/newlib/libc/machine/hppa/memcmp.S b/newlib/libc/machine/hppa/memcmp.S deleted file mode 100644 index babb20761..000000000 --- a/newlib/libc/machine/hppa/memcmp.S +++ /dev/null @@ -1,183 +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. - */ - -/* memcmp(s1, s2, n) */ -/* 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 */ -#ifndef _NAMESPACE_CLEAN -#define NOSECDEF /* prevents _memcmp from becoming primary entry */ -#endif - -#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(memcmp) - combt,<,n r0,count,search /*N <= 0 yields equality */ - b done /**/ - copy 0,ret0 /*return 0 (DELAY SLOT) */ -search: combf,=,n s1,s2,findout /*s1 != s2? */ - b done - copy 0,ret0 /*return 0 (delay slot) */ -findout: - comibf,=,n 0,s1,checks1 /*s1 == NULL? */ - ldbs 0(0,s2),ret0 /**/ - b done /*quit */ - sub 0,ret0,ret0 /*ret0 <- -*s2 */ -checks1: - comibf,=,n 0,s2,checkitout /*s2 == NULL? */ - b done /* quit */ - 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,checkN /* We may be done */ - -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) */ - 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) */ - 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) */ - 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) */ - b done /* if we reach this point we know that */ - sub tmp3,tmp7,ret0 /* the last character in the word is */ - /* where the difference is, so return */ - /* the difference and we're outta here */ - - -checkN: - addibt,<=,n -4,count,zero /* have we checked N chars? */ - 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 /**/ - subi 4,tmp1,tmp1 /* tmp1 now has the number of byte that */ - /* are valid in s2word before the vshd */ - mtctl tmp3,11 /* Move shift amount to CR11 */ -more: combt,<=,n count,tmp1,chunk1 /* Can we do the vshd? */ - 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? */ - copy tmp7,s2word /**/ - b more /* keep checking */ - ldwm 4(0,s1),s1word /* get next s1 (DELAY SLOT) */ - -chunk1: - vshd s2word,r0,s2word /* do an arithmetic shift left to position data */ - b ckbyte2 /**/ - extru s1word,7,8,tmp3 /**/ - - -shifts1: - sh3add tmp3,r0,tmp3 /* eight bits per byte so mul by 8 */ - sub r0,tmp3,tmp3 /* Get negative value for left shift */ - dep r0,31,2,s2 /* Compute word address of s2 */ - 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 /**/ - subi 4,tmp5,tmp5 /*tmp5 now has the number of byte that */ - /*are valid in s1word before the vshd */ - mtctl tmp3,11 /*Move shift amount to CR11 */ -more1: combt,<=,n count,tmp5,chunk2 /*Can we do the vshd? */ - 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? */ - 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(memcmp) |