diff options
Diffstat (limited to 'arch/arc/lib/strchr-700.S')
-rw-r--r-- | arch/arc/lib/strchr-700.S | 141 |
1 files changed, 0 insertions, 141 deletions
diff --git a/arch/arc/lib/strchr-700.S b/arch/arc/lib/strchr-700.S deleted file mode 100644 index 55fcc9fb00..0000000000 --- a/arch/arc/lib/strchr-700.S +++ /dev/null @@ -1,141 +0,0 @@ -/* - * Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. - * - * SPDX-License-Identifier: GPL-2.0+ - */ - -/* - * ARC700 has a relatively long pipeline and branch prediction, so we want - * to avoid branches that are hard to predict. On the other hand, the - * presence of the norm instruction makes it easier to operate on whole - * words branch-free. - */ - -.global strchr -.align 4 -strchr: - extb_s %r1, %r1 - asl %r5, %r1, 8 - bmsk %r2, %r0, 1 - or %r5, %r5, %r1 - mov_s %r3, 0x01010101 - breq.d %r2, %r0, .Laligned - asl %r4, %r5, 16 - sub_s %r0, %r0, %r2 - asl %r7, %r2, 3 - ld_s %r2, [%r0] -#ifdef __LITTLE_ENDIAN__ - asl %r7, %r3, %r7 -#else /* __BIG_ENDIAN__ */ - lsr %r7, %r3, %r7 -#endif /* _ENDIAN__ */ - or %r5, %r5, %r4 - ror %r4, %r3 - sub %r12, %r2, %r7 - bic_s %r12, %r12, %r2 - and %r12, %r12, %r4 - brne.d %r12, 0, .Lfound0_ua - xor %r6, %r2, %r5 - ld.a %r2, [%r0, 4] - sub %r12, %r6, %r7 - bic %r12, %r12, %r6 -#ifdef __LITTLE_ENDIAN__ - and %r7, %r12, %r4 - /* For speed, we want this branch to be unaligned. */ - breq %r7, 0, .Loop - /* Likewise this one */ - b .Lfound_char -#else /* __BIG_ENDIAN__ */ - and %r12, %r12, %r4 - /* For speed, we want this branch to be unaligned. */ - breq %r12, 0, .Loop - lsr_s %r12, %r12, 7 - bic %r2, %r7, %r6 - b.d .Lfound_char_b - and_s %r2, %r2, %r12 -#endif /* _ENDIAN__ */ - /* We require this code address to be unaligned for speed... */ -.Laligned: - ld_s %r2, [%r0] - or %r5, %r5, %r4 - ror %r4, %r3 - /* ... so that this code address is aligned, for itself and ... */ -.Loop: - sub %r12, %r2, %r3 - bic_s %r12, %r12, %r2 - and %r12, %r12, %r4 - brne.d %r12, 0, .Lfound0 - xor %r6, %r2, %r5 - ld.a %r2, [%r0, 4] - sub %r12, %r6, %r3 - bic %r12, %r12, %r6 - and %r7, %r12, %r4 - breq %r7, 0, .Loop - /* - *... so that this branch is unaligned. - * Found searched-for character. - * r0 has already advanced to next word. - */ -#ifdef __LITTLE_ENDIAN__ - /* - * We only need the information about the first matching byte - * (i.e. the least significant matching byte) to be exact, - * hence there is no problem with carry effects. - */ -.Lfound_char: - sub %r3, %r7, 1 - bic %r3, %r3, %r7 - norm %r2, %r3 - sub_s %r0, %r0, 1 - asr_s %r2, %r2, 3 - j.d [%blink] - sub_s %r0, %r0, %r2 - - .balign 4 -.Lfound0_ua: - mov %r3, %r7 -.Lfound0: - sub %r3, %r6, %r3 - bic %r3, %r3, %r6 - and %r2, %r3, %r4 - or_s %r12, %r12, %r2 - sub_s %r3, %r12, 1 - bic_s %r3, %r3, %r12 - norm %r3, %r3 - add_s %r0, %r0, 3 - asr_s %r12, %r3, 3 - asl.f 0, %r2, %r3 - sub_s %r0, %r0, %r12 - j_s.d [%blink] - mov.pl %r0, 0 -#else /* __BIG_ENDIAN__ */ -.Lfound_char: - lsr %r7, %r7, 7 - - bic %r2, %r7, %r6 -.Lfound_char_b: - norm %r2, %r2 - sub_s %r0, %r0, 4 - asr_s %r2, %r2, 3 - j.d [%blink] - add_s %r0, %r0, %r2 - -.Lfound0_ua: - mov_s %r3, %r7 -.Lfound0: - asl_s %r2, %r2, 7 - or %r7, %r6, %r4 - bic_s %r12, %r12, %r2 - sub %r2, %r7, %r3 - or %r2, %r2, %r6 - bic %r12, %r2, %r12 - bic.f %r3, %r4, %r12 - norm %r3, %r3 - - add.pl %r3, %r3, 1 - asr_s %r12, %r3, 3 - asl.f 0, %r2, %r3 - add_s %r0, %r0, %r12 - j_s.d [%blink] - mov.mi %r0, 0 -#endif /* _ENDIAN__ */ |