U-Boot is a bit special piese of software because it is being
only executed once on power-on as compared to operating system
for example. That's why we don't care much about performance
optimizations instead we're more concerned about size. And up-to-date
compilers might produce much smaller code compared to
performance-optimized routines copy-pasted from the Linux kernel.
Here's an example:
------------------------------->8--------------------------
--- size_asm_strings.txt
+++ size_c_strings.txt
@@ -1,2 +1,2 @@
text data bss dec hex filename
- 121260 3784 3308 128352 1f560 u-boot
+ 120448 3784 3308 127540 1f234 u-boot
------------------------------->8--------------------------
See we were able to shave off ~800 bytes of .text section.
Also usage of string routines implemented in C gives us an ability
to support more HW flavors for free: generated instructions will match
our target as long as correct compiler option is used.
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
master
Alexey Brodkin
7 years ago
parent
9c0e2f6ed3
commit
2178817c4a
@ -1,123 +0,0 @@ |
||||
/* |
||||
* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. |
||||
* |
||||
* SPDX-License-Identifier: GPL-2.0+ |
||||
*/ |
||||
|
||||
#ifdef __LITTLE_ENDIAN__ |
||||
#define WORD2 r2 |
||||
#define SHIFT r3 |
||||
#else /* __BIG_ENDIAN__ */ |
||||
#define WORD2 r3 |
||||
#define SHIFT r2 |
||||
#endif /* _ENDIAN__ */ |
||||
|
||||
.global memcmp
|
||||
.align 4
|
||||
memcmp: |
||||
or %r12, %r0, %r1 |
||||
asl_s %r12, %r12, 30 |
||||
sub %r3, %r2, 1 |
||||
brls %r2, %r12, .Lbytewise |
||||
ld %r4, [%r0, 0] |
||||
ld %r5, [%r1, 0] |
||||
lsr.f %lp_count, %r3, 3 |
||||
lpne .Loop_end |
||||
ld_s WORD2, [%r0, 4] |
||||
ld_s %r12, [%r1, 4] |
||||
brne %r4, %r5, .Leven |
||||
ld.a %r4, [%r0, 8] |
||||
ld.a %r5, [%r1, 8] |
||||
brne WORD2, %r12, .Lodd |
||||
nop |
||||
.Loop_end: |
||||
asl_s SHIFT, SHIFT, 3 |
||||
bhs_s .Last_cmp |
||||
brne %r4, %r5, .Leven |
||||
ld %r4, [%r0, 4] |
||||
ld %r5, [%r1, 4] |
||||
#ifdef __LITTLE_ENDIAN__ |
||||
nop_s |
||||
/* one more load latency cycle */ |
||||
.Last_cmp: |
||||
xor %r0, %r4, %r5 |
||||
bset %r0, %r0, SHIFT |
||||
sub_s %r1, %r0, 1 |
||||
bic_s %r1, %r1, %r0 |
||||
norm %r1, %r1 |
||||
b.d .Leven_cmp |
||||
and %r1, %r1, 24 |
||||
.Leven: |
||||
xor %r0, %r4, %r5 |
||||
sub_s %r1, %r0, 1 |
||||
bic_s %r1, %r1, %r0 |
||||
norm %r1, %r1 |
||||
/* slow track insn */ |
||||
and %r1, %r1, 24 |
||||
.Leven_cmp: |
||||
asl %r2, %r4, %r1 |
||||
asl %r12, %r5, %r1 |
||||
lsr_s %r2, %r2, 1 |
||||
lsr_s %r12, %r12, 1 |
||||
j_s.d [%blink] |
||||
sub %r0, %r2, %r12 |
||||
.balign 4
|
||||
.Lodd: |
||||
xor %r0, WORD2, %r12 |
||||
sub_s %r1, %r0, 1 |
||||
bic_s %r1, %r1, %r0 |
||||
norm %r1, %r1 |
||||
/* slow track insn */ |
||||
and %r1, %r1, 24 |
||||
asl_s %r2, %r2, %r1 |
||||
asl_s %r12, %r12, %r1 |
||||
lsr_s %r2, %r2, 1 |
||||
lsr_s %r12, %r12, 1 |
||||
j_s.d [%blink] |
||||
sub %r0, %r2, %r12 |
||||
#else /* __BIG_ENDIAN__ */ |
||||
.Last_cmp: |
||||
neg_s SHIFT, SHIFT |
||||
lsr %r4, %r4, SHIFT |
||||
lsr %r5, %r5, SHIFT |
||||
/* slow track insn */ |
||||
.Leven: |
||||
sub.f %r0, %r4, %r5 |
||||
mov.ne %r0, 1 |
||||
j_s.d [%blink] |
||||
bset.cs %r0, %r0, 31 |
||||
.Lodd: |
||||
cmp_s WORD2, %r12 |
||||
|
||||
mov_s %r0, 1 |
||||
j_s.d [%blink] |
||||
bset.cs %r0, %r0, 31 |
||||
#endif /* _ENDIAN__ */ |
||||
.balign 4
|
||||
.Lbytewise: |
||||
breq %r2, 0, .Lnil |
||||
ldb %r4, [%r0, 0] |
||||
ldb %r5, [%r1, 0] |
||||
lsr.f %lp_count, %r3 |
||||
lpne .Lbyte_end |
||||
ldb_s %r3, [%r0, 1] |
||||
ldb %r12, [%r1, 1] |
||||
brne %r4, %r5, .Lbyte_even |
||||
ldb.a %r4, [%r0, 2] |
||||
ldb.a %r5, [%r1, 2] |
||||
brne %r3, %r12, .Lbyte_odd |
||||
nop |
||||
.Lbyte_end: |
||||
bcc .Lbyte_even |
||||
brne %r4, %r5, .Lbyte_even |
||||
ldb_s %r3, [%r0, 1] |
||||
ldb_s %r12, [%r1, 1] |
||||
.Lbyte_odd: |
||||
j_s.d [%blink] |
||||
sub %r0, %r3, %r12 |
||||
.Lbyte_even: |
||||
j_s.d [%blink] |
||||
sub %r0, %r4, %r5 |
||||
.Lnil: |
||||
j_s.d [%blink] |
||||
mov %r0, 0 |
||||
@ -1,63 +0,0 @@ |
||||
/* |
||||
* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. |
||||
* |
||||
* SPDX-License-Identifier: GPL-2.0+ |
||||
*/ |
||||
|
||||
.global memcpy
|
||||
.align 4
|
||||
memcpy: |
||||
or %r3, %r0, %r1 |
||||
asl_s %r3, %r3, 30 |
||||
mov_s %r5, %r0 |
||||
brls.d %r2, %r3, .Lcopy_bytewise |
||||
sub.f %r3, %r2, 1 |
||||
ld_s %r12, [%r1, 0] |
||||
asr.f %lp_count, %r3, 3 |
||||
bbit0.d %r3, 2, .Lnox4 |
||||
bmsk_s %r2, %r2, 1 |
||||
st.ab %r12, [%r5, 4] |
||||
ld.a %r12, [%r1, 4] |
||||
.Lnox4: |
||||
lppnz .Lendloop |
||||
ld_s %r3, [%r1, 4] |
||||
st.ab %r12, [%r5, 4] |
||||
ld.a %r12, [%r1, 8] |
||||
st.ab %r3, [%r5, 4] |
||||
.Lendloop: |
||||
breq %r2, 0, .Last_store |
||||
ld %r3, [%r5, 0] |
||||
#ifdef __LITTLE_ENDIAN__ |
||||
add3 %r2, -1, %r2 |
||||
/* uses long immediate */ |
||||
xor_s %r12, %r12, %r3 |
||||
bmsk %r12, %r12, %r2 |
||||
xor_s %r12, %r12, %r3 |
||||
#else /* __BIG_ENDIAN__ */ |
||||
sub3 %r2, 31, %r2 |
||||
/* uses long immediate */ |
||||
xor_s %r3, %r3, %r12 |
||||
bmsk %r3, %r3, %r2 |
||||
xor_s %r12, %r12, %r3 |
||||
#endif /* _ENDIAN__ */ |
||||
.Last_store: |
||||
j_s.d [%blink] |
||||
st %r12, [%r5, 0] |
||||
|
||||
.balign 4
|
||||
.Lcopy_bytewise: |
||||
jcs [%blink] |
||||
ldb_s %r12, [%r1, 0] |
||||
lsr.f %lp_count, %r3 |
||||
bhs_s .Lnox1 |
||||
stb.ab %r12, [%r5, 1] |
||||
ldb.a %r12, [%r1, 1] |
||||
.Lnox1: |
||||
lppnz .Lendbloop |
||||
ldb_s %r3, [%r1, 1] |
||||
stb.ab %r12, [%r5, 1] |
||||
ldb.a %r12, [%r1, 2] |
||||
stb.ab %r3, [%r5, 1] |
||||
.Lendbloop: |
||||
j_s.d [%blink] |
||||
stb %r12, [%r5, 0] |
||||
@ -1,62 +0,0 @@ |
||||
/* |
||||
* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. |
||||
* |
||||
* SPDX-License-Identifier: GPL-2.0+ |
||||
*/ |
||||
|
||||
#define SMALL 7 /* Must be at least 6 to deal with alignment/loop issues. */ |
||||
|
||||
.global memset
|
||||
.align 4
|
||||
memset: |
||||
mov_s %r4, %r0 |
||||
or %r12, %r0, %r2 |
||||
bmsk.f %r12, %r12, 1 |
||||
extb_s %r1, %r1 |
||||
asl %r3, %r1, 8 |
||||
beq.d .Laligned |
||||
or_s %r1, %r1, %r3 |
||||
brls %r2, SMALL, .Ltiny |
||||
add %r3, %r2, %r0 |
||||
stb %r1, [%r3, -1] |
||||
bclr_s %r3, %r3, 0 |
||||
stw %r1, [%r3, -2] |
||||
bmsk.f %r12, %r0, 1 |
||||
add_s %r2, %r2, %r12 |
||||
sub.ne %r2, %r2, 4 |
||||
stb.ab %r1, [%r4, 1] |
||||
and %r4, %r4, -2 |
||||
stw.ab %r1, [%r4, 2] |
||||
and %r4, %r4, -4 |
||||
|
||||
.balign 4
|
||||
.Laligned: |
||||
asl %r3, %r1, 16 |
||||
lsr.f %lp_count, %r2, 2 |
||||
or_s %r1, %r1, %r3 |
||||
lpne .Loop_end |
||||
st.ab %r1, [%r4, 4] |
||||
.Loop_end: |
||||
j_s [%blink] |
||||
|
||||
.balign 4
|
||||
.Ltiny: |
||||
mov.f %lp_count, %r2 |
||||
lpne .Ltiny_end |
||||
stb.ab %r1, [%r4, 1] |
||||
.Ltiny_end: |
||||
j_s [%blink] |
||||
|
||||
/* |
||||
* memzero: @r0 = mem, @r1 = size_t
|
||||
* memset: @r0 = mem, @r1 = char, @r2 = size_t
|
||||
*/ |
||||
|
||||
.global memzero
|
||||
.align 4
|
||||
memzero: |
||||
/* adjust bzero args to memset args */ |
||||
mov %r2, %r1 |
||||
mov %r1, 0 |
||||
/* tail call so need to tinker with blink */ |
||||
b memset |
||||
@ -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__ */ |
||||
@ -1,97 +0,0 @@ |
||||
/* |
||||
* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. |
||||
* |
||||
* SPDX-License-Identifier: GPL-2.0+ |
||||
*/ |
||||
|
||||
/* |
||||
* This is optimized primarily for the ARC700. |
||||
* It would be possible to speed up the loops by one cycle / word |
||||
* respective one cycle / byte by forcing double source 1 alignment, unrolling |
||||
* by a factor of two, and speculatively loading the second word / byte of |
||||
* source 1; however, that would increase the overhead for loop setup / finish,
|
||||
* and strcmp might often terminate early. |
||||
*/ |
||||
|
||||
.global strcmp
|
||||
.align 4
|
||||
strcmp: |
||||
or %r2, %r0, %r1 |
||||
bmsk_s %r2, %r2, 1 |
||||
brne %r2, 0, .Lcharloop |
||||
mov_s %r12, 0x01010101 |
||||
ror %r5, %r12 |
||||
.Lwordloop: |
||||
ld.ab %r2, [%r0, 4] |
||||
ld.ab %r3, [%r1, 4] |
||||
nop_s |
||||
sub %r4, %r2, %r12 |
||||
bic %r4, %r4, %r2 |
||||
and %r4, %r4, %r5 |
||||
brne %r4, 0, .Lfound0 |
||||
breq %r2 ,%r3, .Lwordloop |
||||
#ifdef __LITTLE_ENDIAN__ |
||||
xor %r0, %r2, %r3 /* mask for difference */ |
||||
sub_s %r1, %r0, 1 |
||||
bic_s %r0, %r0, %r1 /* mask for least significant difference bit */ |
||||
sub %r1, %r5, %r0 |
||||
xor %r0, %r5, %r1 /* mask for least significant difference byte */ |
||||
and_s %r2, %r2, %r0 |
||||
and_s %r3, %r3, %r0 |
||||
#endif /* _ENDIAN__ */ |
||||
cmp_s %r2, %r3 |
||||
mov_s %r0, 1 |
||||
j_s.d [%blink] |
||||
bset.lo %r0, %r0, 31 |
||||
|
||||
.balign 4
|
||||
#ifdef __LITTLE_ENDIAN__ |
||||
.Lfound0: |
||||
xor %r0, %r2, %r3 /* mask for difference */ |
||||
or %r0, %r0, %r4 /* or in zero indicator */ |
||||
sub_s %r1, %r0, 1 |
||||
bic_s %r0, %r0, %r1 /* mask for least significant difference bit */ |
||||
sub %r1, %r5, %r0 |
||||
xor %r0, %r5, %r1 /* mask for least significant difference byte */ |
||||
and_s %r2, %r2, %r0 |
||||
and_s %r3, %r3, %r0 |
||||
sub.f %r0, %r2, %r3 |
||||
mov.hi %r0, 1 |
||||
j_s.d [%blink] |
||||
bset.lo %r0, %r0, 31 |
||||
#else /* __BIG_ENDIAN__ */ |
||||
/* |
||||
* The zero-detection above can mis-detect 0x01 bytes as zeroes |
||||
* because of carry-propagateion from a lower significant zero byte. |
||||
* We can compensate for this by checking that bit0 is zero. |
||||
* This compensation is not necessary in the step where we |
||||
* get a low estimate for r2, because in any affected bytes |
||||
* we already have 0x00 or 0x01, which will remain unchanged |
||||
* when bit 7 is cleared. |
||||
*/ |
||||
.balign 4
|
||||
.Lfound0: |
||||
lsr %r0, %r4, 8 |
||||
lsr_s %r1, %r2 |
||||
bic_s %r2, %r2, %r0 /* get low estimate for r2 and get ... */ |
||||
bic_s %r0, %r0, %r1 /* <this is the adjusted mask for zeros> */ |
||||
or_s %r3, %r3, %r0 /* ... high estimate r3 so that r2 > r3 will */ |
||||
cmp_s %r3, %r2 /* ... be independent of trailing garbage */ |
||||
or_s %r2, %r2, %r0 /* likewise for r3 > r2 */ |
||||
bic_s %r3, %r3, %r0 |
||||
rlc %r0, 0 /* r0 := r2 > r3 ? 1 : 0 */ |
||||
cmp_s %r2, %r3 |
||||
j_s.d [%blink] |
||||
bset.lo %r0, %r0, 31 |
||||
#endif /* _ENDIAN__ */ |
||||
|
||||
.balign 4
|
||||
.Lcharloop: |
||||
ldb.ab %r2,[%r0,1] |
||||
ldb.ab %r3,[%r1,1] |
||||
nop_s |
||||
breq %r2, 0, .Lcmpend |
||||
breq %r2, %r3, .Lcharloop |
||||
.Lcmpend: |
||||
j_s.d [%blink] |
||||
sub %r0, %r2, %r3 |
||||
@ -1,67 +0,0 @@ |
||||
/* |
||||
* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. |
||||
* |
||||
* SPDX-License-Identifier: GPL-2.0+ |
||||
*/ |
||||
|
||||
/* |
||||
* If dst and src are 4 byte aligned, copy 8 bytes at a time. |
||||
* If the src is 4, but not 8 byte aligned, we first read 4 bytes to get |
||||
* it 8 byte aligned. Thus, we can do a little read-ahead, without |
||||
* dereferencing a cache line that we should not touch. |
||||
* Note that short and long instructions have been scheduled to avoid |
||||
* branch stalls. |
||||
* The beq_s to r3z could be made unaligned & long to avoid a stall |
||||
* there, but it is not likely to be taken often, and it would also be likely |
||||
* to cost an unaligned mispredict at the next call. |
||||
*/ |
||||
|
||||
.global strcpy
|
||||
.align 4
|
||||
strcpy: |
||||
or %r2, %r0, %r1 |
||||
bmsk_s %r2, %r2, 1 |
||||
brne.d %r2, 0, charloop |
||||
mov_s %r10, %r0 |
||||
ld_s %r3, [%r1, 0] |
||||
mov %r8, 0x01010101 |
||||
bbit0.d %r1, 2, loop_start |
||||
ror %r12, %r8 |
||||
sub %r2, %r3, %r8 |
||||
bic_s %r2, %r2, %r3 |
||||
tst_s %r2,%r12 |
||||
bne r3z |
||||
mov_s %r4,%r3 |
||||
.balign 4
|
||||
loop: |
||||
ld.a %r3, [%r1, 4] |
||||
st.ab %r4, [%r10, 4] |
||||
loop_start: |
||||
ld.a %r4, [%r1, 4] |
||||
sub %r2, %r3, %r8 |
||||
bic_s %r2, %r2, %r3 |
||||
tst_s %r2, %r12 |
||||
bne_s r3z |
||||
st.ab %r3, [%r10, 4] |
||||
sub %r2, %r4, %r8 |
||||
bic %r2, %r2, %r4 |
||||
tst %r2, %r12 |
||||
beq loop |
||||
mov_s %r3, %r4 |
||||
#ifdef __LITTLE_ENDIAN__ |
||||
r3z: bmsk.f %r1, %r3, 7 |
||||
lsr_s %r3, %r3, 8 |
||||
#else /* __BIG_ENDIAN__ */ |
||||
r3z: lsr.f %r1, %r3, 24 |
||||
asl_s %r3, %r3, 8 |
||||
#endif /* _ENDIAN__ */ |
||||
bne.d r3z |
||||
stb.ab %r1, [%r10, 1] |
||||
j_s [%blink] |
||||
|
||||
.balign 4
|
||||
charloop: |
||||
ldb.ab %r3, [%r1, 1] |
||||
brne.d %r3, 0, charloop |
||||
stb.ab %r3, [%r10, 1] |
||||
j [%blink] |
||||
@ -1,80 +0,0 @@ |
||||
/* |
||||
* Copyright (C) 2004, 2007-2010, 2011-2014 Synopsys, Inc. All rights reserved. |
||||
* |
||||
* SPDX-License-Identifier: GPL-2.0+ |
||||
*/ |
||||
|
||||
.global strlen
|
||||
.align 4
|
||||
strlen: |
||||
or %r3, %r0, 7 |
||||
ld %r2, [%r3, -7] |
||||
ld.a %r6, [%r3, -3] |
||||
mov %r4, 0x01010101 |
||||
/* uses long immediate */ |
||||
#ifdef __LITTLE_ENDIAN__ |
||||
asl_s %r1, %r0, 3 |
||||
btst_s %r0, 2 |
||||
asl %r7, %r4, %r1 |
||||
ror %r5, %r4 |
||||
sub %r1, %r2, %r7 |
||||
bic_s %r1, %r1, %r2 |
||||
mov.eq %r7, %r4 |
||||
sub %r12, %r6, %r7 |
||||
bic %r12, %r12, %r6 |
||||
or.eq %r12, %r12, %r1 |
||||
and %r12, %r12, %r5 |
||||
brne %r12, 0, .Learly_end |
||||
#else /* __BIG_ENDIAN__ */ |
||||
ror %r5, %r4 |
||||
btst_s %r0, 2 |
||||
mov_s %r1, 31 |
||||
sub3 %r7, %r1, %r0 |
||||
sub %r1, %r2, %r4 |
||||
bic_s %r1, %r1, %r2 |
||||
bmsk %r1, %r1, %r7 |
||||
sub %r12, %r6, %r4 |
||||
bic %r12, %r12, %r6 |
||||
bmsk.ne %r12, %r12, %r7 |
||||
or.eq %r12, %r12, %r1 |
||||
and %r12, %r12, %r5 |
||||
brne %r12, 0, .Learly_end |
||||
#endif /* _ENDIAN__ */ |
||||
|
||||
.Loop: |
||||
ld_s %r2, [%r3, 4] |
||||
ld.a %r6, [%r3, 8] |
||||
/* stall for load result */ |
||||
sub %r1, %r2, %r4 |
||||
bic_s %r1, %r1, %r2 |
||||
sub %r12, %r6, %r4 |
||||
bic %r12, %r12, %r6 |
||||
or %r12, %r12, %r1 |
||||
and %r12, %r12, %r5 |
||||
breq %r12, 0, .Loop |
||||
.Lend: |
||||
and.f %r1, %r1, %r5 |
||||
sub.ne %r3, %r3, 4 |
||||
mov.eq %r1, %r12 |
||||
#ifdef __LITTLE_ENDIAN__ |
||||
sub_s %r2, %r1, 1 |
||||
bic_s %r2, %r2, %r1 |
||||
norm %r1, %r2 |
||||
sub_s %r0, %r0, 3 |
||||
lsr_s %r1, %r1, 3 |
||||
sub %r0, %r3, %r0 |
||||
j_s.d [%blink] |
||||
sub %r0, %r0, %r1 |
||||
#else /* __BIG_ENDIAN__ */ |
||||
lsr_s %r1, %r1, 7 |
||||
mov.eq %r2, %r6 |
||||
bic_s %r1, %r1, %r2 |
||||
norm %r1, %r1 |
||||
sub %r0, %r3, %r0 |
||||
lsr_s %r1, %r1, 3 |
||||
j_s.d [%blink] |
||||
add %r0, %r0, %r1 |
||||
#endif /* _ENDIAN */ |
||||
.Learly_end: |
||||
b.d .Lend |
||||
sub_s.ne %r1, %r1, %r1 |
||||
Loading…
Reference in new issue