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Diffstat (limited to 'libc/string/sparc/sparc32/strcat.S')
-rw-r--r--libc/string/sparc/sparc32/strcat.S346
1 files changed, 346 insertions, 0 deletions
diff --git a/libc/string/sparc/sparc32/strcat.S b/libc/string/sparc/sparc32/strcat.S
new file mode 100644
index 000000000..e4ff21d01
--- /dev/null
+++ b/libc/string/sparc/sparc32/strcat.S
@@ -0,0 +1,346 @@
+/* strcat (dest, src) -- Append SRC on the end of DEST.
+ For SPARC v7.
+ Copyright (C) 1996, 1999, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Jakub Jelinek <jj@ultra.linux.cz>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+ /* Normally, this uses ((xword - 0x01010101) & 0x80808080) test
+ to find out if any byte in xword could be zero. This is fast, but
+ also gives false alarm for any byte in range 0x81-0xff. It does
+ not matter for correctness, as if this test tells us there could
+ be some zero byte, we check it byte by byte, but if bytes with
+ high bits set are common in the strings, then this will give poor
+ performance. You can #define EIGHTBIT_NOT_RARE and the algorithm
+ will use one tick slower, but more precise test
+ ((xword - 0x01010101) & (~xword) & 0x80808080),
+ which does not give any false alarms (but if some bits are set,
+ one cannot assume from it which bytes are zero and which are not).
+ It is yet to be measured, what is the correct default for glibc
+ in these days for an average user.
+ */
+
+ .text
+ .align 4
+10: cmp %o4, 2
+ be 1f
+ cmp %o4, 3
+ ldub [%o1], %o5
+ add %o1, 1, %o1
+ stb %o5, [%o0]
+ be 3f
+ cmp %o5, 0
+ be 0f
+ add %o0, 1, %o0
+1: lduh [%o1], %o5
+ add %o1, 2, %o1
+ srl %o5, 8, %o4
+ cmp %o4, 0
+ stb %o4, [%o0]
+ bne,a 2f
+ stb %o5, [%o0 + 1]
+ retl
+ mov %g2, %o0
+2: andcc %o5, 0xff, %o5
+ bne 4f
+ add %o0, 2, %o0
+ retl
+ mov %g2, %o0
+3: bne 4f
+ add %o0, 1, %o0
+ retl
+ mov %g2, %o0
+
+11: ldub [%o0], %o5
+ cmp %o5, 0
+ be 1f
+ add %o0, 1, %o0
+ andcc %o0, 3, %g0
+ be 7f
+ or %o4, %lo(0x80808080), %o3
+ ldub [%o0], %o5
+ cmp %o5, 0
+ be 2f
+ add %o0, 1, %o0
+ andcc %o0, 3, %g0
+ be 8f
+ sethi %hi(0x01010101), %o4
+ ldub [%o0], %o5
+ cmp %o5, 0
+ be 3f
+ add %o0, 1, %o0
+ b 9f
+ or %o4, %lo(0x01010101), %o2
+1: or %o4, %lo(0x80808080), %o3
+2: sethi %hi(0x01010101), %o4
+3: or %o4, %lo(0x01010101), %o2
+ b 3f
+ sub %o0, 1, %o0
+
+ENTRY(strcat)
+ mov %o0, %g2
+ andcc %o0, 3, %g0
+ bne 11b
+ sethi %hi(0x80808080), %o4
+ or %o4, %lo(0x80808080), %o3
+7: sethi %hi(0x01010101), %o4
+8: or %o4, %lo(0x01010101), %o2
+9: ld [%o0], %o5
+7: sub %o5, %o2, %o4
+#ifdef EIGHTBIT_NOT_RARE
+ andn %o4, %o5, %o4
+#endif
+ andcc %o4, %o3, %g0
+ be 9b
+ add %o0, 4, %o0
+
+ srl %o5, 24, %g5
+ andcc %g5, 0xff, %g0
+ be 3f
+ add %o0, -4, %o0
+ srl %o5, 16, %g5
+ andcc %g5, 0xff, %g0
+ be 3f
+ add %o0, 1, %o0
+ srl %o5, 8, %g5
+ andcc %g5, 0xff, %g0
+ be 3f
+ add %o0, 1, %o0
+ andcc %o5, 0xff, %g0
+ add %o0, 2, %o0
+ bne,a 7b
+ ld [%o0], %o5
+ sub %o0, 1, %o0
+3: andcc %o1, 3, %o4
+ bne 10b
+4: andcc %o0, 3, %g3
+ bne 12f
+1: ld [%o1], %o5
+ add %o1, 4, %o1
+ sub %o5, %o2, %o4
+#ifdef EIGHTBIT_NOT_RARE
+ andn %o4, %o5, %o4
+#endif
+ add %o0, 4, %o0
+ andcc %o4, %o3, %g0
+ be,a 1b
+ st %o5, [%o0 - 4]
+
+ srl %o5, 24, %g5
+ andcc %g5, 0xff, %g0
+ be 1f
+ srl %o5, 16, %g5
+ andcc %g5, 0xff, %g0
+ be 2f
+ srl %o5, 8, %g5
+ andcc %g5, 0xff, %g0
+ be 3f
+ andcc %o5, 0xff, %g0
+ bne 1b
+ st %o5, [%o0 - 4]
+ retl
+ mov %g2, %o0
+3: srl %o5, 16, %o5
+ sth %o5, [%o0 - 4]
+ stb %g0, [%o0 - 2]
+ retl
+ mov %g2, %o0
+2: srl %o5, 16, %o5
+ sth %o5, [%o0 - 4]
+ retl
+ mov %g2, %o0
+1: stb %g0, [%o0 - 4]
+ retl
+ mov %g2, %o0
+
+12: add %o1, 4, %o1
+ sub %o5, %o2, %o4
+ cmp %g3, 2
+ be 2f
+ cmp %g3, 3
+ be 3f
+ andcc %o4, %o3, %g0
+ bne 5f
+ srl %o5, 24, %g5
+ stb %g5, [%o0]
+ sub %o0, 1, %o0
+ srl %o5, 8, %g5
+ sth %g5, [%o0 + 2]
+1: add %o0, 4, %o0
+4: sll %o5, 24, %g6
+ ld [%o1], %o5
+ add %o1, 4, %o1
+ srl %o5, 8, %g5
+ sub %o5, %o2, %o4
+#ifdef EIGHTBIT_NOT_RARE
+ andn %o4, %o5, %o4
+#endif
+ or %g5, %g6, %g5
+ andcc %o4, %o3, %g0
+ be,a 1b
+ st %g5, [%o0]
+ srl %o5, 24, %o4
+ andcc %o4, 0xff, %g0
+ be 6f
+ srl %o5, 16, %o4
+ andcc %o4, 0xff, %g0
+ be 7f
+ srl %o5, 8, %o4
+ st %g5, [%o0]
+ andcc %o4, 0xff, %g0
+ be 0f
+ andcc %o5, 0xff, %g0
+1: bne 4b
+ add %o0, 4, %o0
+9: stb %g0, [%o0]
+0: retl
+ mov %g2, %o0
+
+6: srl %g5, 16, %g5
+ sth %g5, [%o0]
+ retl
+ mov %g2, %o0
+
+7: srl %g5, 16, %g5
+ sth %g5, [%o0]
+ stb %g0, [%o0 + 2]
+ retl
+ mov %g2, %o0
+
+5: andcc %g5, 0xff, %g4
+ be 9b
+ srl %o5, 16, %g5
+ andcc %g5, 0xff, %g0
+ be 7f
+ srl %o5, 8, %g5
+ andcc %g5, 0xff, %g0
+ stb %g4, [%o0]
+ sth %g5, [%o0 + 1]
+ sub %o0, 1, %o0
+ bne 1b
+ andcc %o5, 0xff, %g0
+ retl
+ mov %g2, %o0
+
+7: stb %g4, [%o0]
+ stb %g0, [%o0 + 1]
+ retl
+ mov %g2, %o0
+
+2: andcc %o4, %o3, %g0
+ bne 5f
+ srl %o5, 16, %g5
+ sth %g5, [%o0]
+ sub %o0, 2, %o0
+1: add %o0, 4, %o0
+4: sll %o5, 16, %g6
+ ld [%o1], %o5
+ add %o1, 4, %o1
+ srl %o5, 16, %g5
+ sub %o5, %o2, %o4
+#ifdef EIGHTBIT_NOT_RARE
+ andn %o4, %o5, %o4
+#endif
+ or %g5, %g6, %g5
+ andcc %o4, %o3, %g0
+ be,a 1b
+ st %g5, [%o0]
+ srl %o5, 24, %o4
+ andcc %o4, 0xff, %g0
+ be 7f
+ srl %o5, 16, %o4
+ st %g5, [%o0]
+ andcc %o4, 0xff, %g0
+ be 0b
+ srl %o5, 8, %o4
+1: andcc %o4, 0xff, %g0
+ be 8f
+ andcc %o5, 0xff, %g0
+ bne 4b
+ add %o0, 4, %o0
+ sth %o5, [%o0]
+ retl
+ mov %g2, %o0
+
+7: srl %g5, 16, %g5
+ sth %g5, [%o0]
+ stb %g0, [%o0 + 2]
+ retl
+ mov %g2, %o0
+
+8: stb %g0, [%o0 + 4]
+ retl
+ mov %g2, %o0
+
+5: srl %o5, 24, %g5
+ andcc %g5, 0xff, %g0
+ be 9b
+ srl %o5, 16, %g5
+ andcc %g5, 0xff, %g0
+ sth %g5, [%o0]
+ sub %o0, 2, %o0
+ bne 1b
+ srl %o5, 8, %o4
+ retl
+ mov %g2, %o0
+
+3: bne 5f
+ srl %o5, 24, %g5
+ stb %g5, [%o0]
+ sub %o0, 3, %o0
+1: add %o0, 4, %o0
+4: sll %o5, 8, %g6
+ ld [%o1], %o5
+ add %o1, 4, %o1
+ srl %o5, 24, %g5
+ sub %o5, %o2, %o4
+#ifdef EIGHTBIT_NOT_RARE
+ andn %o4, %o5, %o4
+#endif
+ or %g5, %g6, %g5
+ andcc %o4, %o3, %g0
+ be 1b
+ st %g5, [%o0]
+ srl %o5, 24, %o4
+ andcc %o4, 0xff, %g0
+ be 0b
+ srl %o5, 16, %o4
+1: andcc %o4, 0xff, %g0
+ be 8b
+ srl %o5, 8, %o4
+ andcc %o4, 0xff, %g0
+ be 9f
+ andcc %o5, 0xff, %g0
+ bne 4b
+ add %o0, 4, %o0
+ srl %o5, 8, %o5
+ sth %o5, [%o0]
+ stb %g0, [%o0 + 2]
+ retl
+ mov %g2, %o0
+9: srl %o5, 8, %o5
+ sth %o5, [%o0 + 4]
+ retl
+ mov %g2, %o0
+5: andcc %g5, 0xff, %g0
+ stb %g5, [%o0]
+ sub %o0, 3, %o0
+ bne 1b
+ srl %o5, 16, %o4
+ retl
+ mov %g2, %o0
+END(strcat)
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-27 16:29:57 +0000