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authorBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-10-03 13:59:52 +0000
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2008-10-03 13:59:52 +0000
commit2ba017a2d5af01cc3ef0dc554252a521e8d7c4f8 (patch)
tree0e0db7e3fbb4fbe1be3c56ad6c80bb7d63effb93 /libc/string/xtensa/strcmp.S
parent94bbeb72728193288f2bf071cf0e40293499045b (diff)
- use c89-style comments
Closes issue #5194
Diffstat (limited to 'libc/string/xtensa/strcmp.S')
-rw-r--r--libc/string/xtensa/strcmp.S148
1 files changed, 74 insertions, 74 deletions
diff --git a/libc/string/xtensa/strcmp.S b/libc/string/xtensa/strcmp.S
index 622bb27ed..ac058a2bf 100644
--- a/libc/string/xtensa/strcmp.S
+++ b/libc/string/xtensa/strcmp.S
@@ -45,35 +45,35 @@
ENTRY (strcmp)
/* a2 = s1, a3 = s2 */
- l8ui a8, a2, 0 // byte 0 from s1
- l8ui a9, a3, 0 // byte 0 from s2
- movi a10, 3 // mask
+ l8ui a8, a2, 0 /* byte 0 from s1 */
+ l8ui a9, a3, 0 /* byte 0 from s2 */
+ movi a10, 3 /* mask */
bne a8, a9, .Lretdiff
or a11, a2, a3
bnone a11, a10, .Laligned
- xor a11, a2, a3 // compare low two bits of s1 and s2
- bany a11, a10, .Lunaligned // if they have different alignment
+ xor a11, a2, a3 /* compare low two bits of s1 and s2 */
+ bany a11, a10, .Lunaligned /* if they have different alignment */
/* s1/s2 are not word-aligned. */
- addi a2, a2, 1 // advance s1
- beqz a8, .Leq // bytes equal, if zero, strings are equal
- addi a3, a3, 1 // advance s2
- bnone a2, a10, .Laligned // if s1/s2 now aligned
- l8ui a8, a2, 0 // byte 1 from s1
- l8ui a9, a3, 0 // byte 1 from s2
- addi a2, a2, 1 // advance s1
- bne a8, a9, .Lretdiff // if different, return difference
- beqz a8, .Leq // bytes equal, if zero, strings are equal
- addi a3, a3, 1 // advance s2
- bnone a2, a10, .Laligned // if s1/s2 now aligned
- l8ui a8, a2, 0 // byte 2 from s1
- l8ui a9, a3, 0 // byte 2 from s2
- addi a2, a2, 1 // advance s1
- bne a8, a9, .Lretdiff // if different, return difference
- beqz a8, .Leq // bytes equal, if zero, strings are equal
- addi a3, a3, 1 // advance s2
+ addi a2, a2, 1 /* advance s1 */
+ beqz a8, .Leq /* bytes equal, if zero, strings are equal */
+ addi a3, a3, 1 /* advance s2 */
+ bnone a2, a10, .Laligned /* if s1/s2 now aligned */
+ l8ui a8, a2, 0 /* byte 1 from s1 */
+ l8ui a9, a3, 0 /* byte 1 from s2 */
+ addi a2, a2, 1 /* advance s1 */
+ bne a8, a9, .Lretdiff /* if different, return difference */
+ beqz a8, .Leq /* bytes equal, if zero, strings are equal */
+ addi a3, a3, 1 /* advance s2 */
+ bnone a2, a10, .Laligned /* if s1/s2 now aligned */
+ l8ui a8, a2, 0 /* byte 2 from s1 */
+ l8ui a9, a3, 0 /* byte 2 from s2 */
+ addi a2, a2, 1 /* advance s1 */
+ bne a8, a9, .Lretdiff /* if different, return difference */
+ beqz a8, .Leq /* bytes equal, if zero, strings are equal */
+ addi a3, a3, 1 /* advance s2 */
j .Laligned
/* s1 and s2 have different alignment.
@@ -92,8 +92,8 @@ ENTRY (strcmp)
/* (2 mod 4) alignment for loop instruction */
.Lunaligned:
#if XCHAL_HAVE_LOOPS
- _movi.n a8, 0 // set up for the maximum loop count
- loop a8, .Lretdiff // loop forever (almost anyway)
+ _movi.n a8, 0 /* set up for the maximum loop count */
+ loop a8, .Lretdiff /* loop forever (almost anyway) */
#endif
.Lnextbyte:
l8ui a8, a2, 0
@@ -131,32 +131,32 @@ ENTRY (strcmp)
#if XCHAL_HAVE_LOOPS
.Laligned:
.begin no-transform
- l32r a4, .Lmask0 // mask for byte 0
+ l32r a4, .Lmask0 /* mask for byte 0 */
l32r a7, .Lmask4
/* Loop forever. (a4 is more than than the maximum number
of iterations) */
loop a4, .Laligned_done
/* First unrolled loop body. */
- l32i a8, a2, 0 // get word from s1
- l32i a9, a3, 0 // get word from s2
+ l32i a8, a2, 0 /* get word from s1 */
+ l32i a9, a3, 0 /* get word from s2 */
slli a5, a8, 1
bne a8, a9, .Lwne2
or a9, a8, a5
bnall a9, a7, .Lprobeq
/* Second unrolled loop body. */
- l32i a8, a2, 4 // get word from s1+4
- l32i a9, a3, 4 // get word from s2+4
+ l32i a8, a2, 4 /* get word from s1+4 */
+ l32i a9, a3, 4 /* get word from s2+4 */
slli a5, a8, 1
bne a8, a9, .Lwne2
or a9, a8, a5
bnall a9, a7, .Lprobeq2
- addi a2, a2, 8 // advance s1 pointer
- addi a3, a3, 8 // advance s2 pointer
+ addi a2, a2, 8 /* advance s1 pointer */
+ addi a3, a3, 8 /* advance s2 pointer */
.Laligned_done:
- or a1, a1, a1 // nop
+ or a1, a1, a1 /* nop */
.Lprobeq2:
/* Adjust pointers to account for the loop unrolling. */
@@ -166,15 +166,15 @@ ENTRY (strcmp)
#else /* !XCHAL_HAVE_LOOPS */
.Laligned:
- movi a4, MASK0 // mask for byte 0
+ movi a4, MASK0 /* mask for byte 0 */
movi a7, MASK4
j .Lfirstword
.Lnextword:
- addi a2, a2, 4 // advance s1 pointer
- addi a3, a3, 4 // advance s2 pointer
+ addi a2, a2, 4 /* advance s1 pointer */
+ addi a3, a3, 4 /* advance s2 pointer */
.Lfirstword:
- l32i a8, a2, 0 // get word from s1
- l32i a9, a3, 0 // get word from s2
+ l32i a8, a2, 0 /* get word from s1 */
+ l32i a9, a3, 0 /* get word from s2 */
slli a5, a8, 1
bne a8, a9, .Lwne2
or a9, a8, a5
@@ -186,49 +186,49 @@ ENTRY (strcmp)
/* Words are probably equal, but check for sure.
If not, loop over the rest of string using normal algorithm. */
- bnone a8, a4, .Leq // if byte 0 is zero
- l32r a5, .Lmask1 // mask for byte 1
- l32r a6, .Lmask2 // mask for byte 2
- bnone a8, a5, .Leq // if byte 1 is zero
- l32r a7, .Lmask3 // mask for byte 3
- bnone a8, a6, .Leq // if byte 2 is zero
- bnone a8, a7, .Leq // if byte 3 is zero
- addi.n a2, a2, 4 // advance s1 pointer
- addi.n a3, a3, 4 // advance s2 pointer
+ bnone a8, a4, .Leq /* if byte 0 is zero */
+ l32r a5, .Lmask1 /* mask for byte 1 */
+ l32r a6, .Lmask2 /* mask for byte 2 */
+ bnone a8, a5, .Leq /* if byte 1 is zero */
+ l32r a7, .Lmask3 /* mask for byte 3 */
+ bnone a8, a6, .Leq /* if byte 2 is zero */
+ bnone a8, a7, .Leq /* if byte 3 is zero */
+ addi.n a2, a2, 4 /* advance s1 pointer */
+ addi.n a3, a3, 4 /* advance s2 pointer */
#if XCHAL_HAVE_LOOPS
/* align (1 mod 4) */
- loop a4, .Leq // loop forever (a4 is bigger than max iters)
+ loop a4, .Leq /* loop forever (a4 is bigger than max iters) */
.end no-transform
- l32i a8, a2, 0 // get word from s1
- l32i a9, a3, 0 // get word from s2
- addi a2, a2, 4 // advance s1 pointer
+ l32i a8, a2, 0 /* get word from s1 */
+ l32i a9, a3, 0 /* get word from s2 */
+ addi a2, a2, 4 /* advance s1 pointer */
bne a8, a9, .Lwne
- bnone a8, a4, .Leq // if byte 0 is zero
- bnone a8, a5, .Leq // if byte 1 is zero
- bnone a8, a6, .Leq // if byte 2 is zero
- bnone a8, a7, .Leq // if byte 3 is zero
- addi a3, a3, 4 // advance s2 pointer
+ bnone a8, a4, .Leq /* if byte 0 is zero */
+ bnone a8, a5, .Leq /* if byte 1 is zero */
+ bnone a8, a6, .Leq /* if byte 2 is zero */
+ bnone a8, a7, .Leq /* if byte 3 is zero */
+ addi a3, a3, 4 /* advance s2 pointer */
#else /* !XCHAL_HAVE_LOOPS */
j .Lfirstword2
.Lnextword2:
- addi a3, a3, 4 // advance s2 pointer
+ addi a3, a3, 4 /* advance s2 pointer */
.Lfirstword2:
- l32i a8, a2, 0 // get word from s1
- l32i a9, a3, 0 // get word from s2
- addi a2, a2, 4 // advance s1 pointer
+ l32i a8, a2, 0 /* get word from s1 */
+ l32i a9, a3, 0 /* get word from s2 */
+ addi a2, a2, 4 /* advance s1 pointer */
bne a8, a9, .Lwne
- bnone a8, a4, .Leq // if byte 0 is zero
- bnone a8, a5, .Leq // if byte 1 is zero
- bnone a8, a6, .Leq // if byte 2 is zero
- bany a8, a7, .Lnextword2 // if byte 3 is zero
+ bnone a8, a4, .Leq /* if byte 0 is zero */
+ bnone a8, a5, .Leq /* if byte 1 is zero */
+ bnone a8, a6, .Leq /* if byte 2 is zero */
+ bany a8, a7, .Lnextword2 /* if byte 3 is zero */
#endif /* !XCHAL_HAVE_LOOPS */
/* Words are equal; some byte is zero. */
-.Leq: movi a2, 0 // return equal
+.Leq: movi a2, 0 /* return equal */
retw
.Lwne2: /* Words are not equal. On big-endian processors, if none of the
@@ -243,18 +243,18 @@ ENTRY (strcmp)
.Lposreturn:
movi a2, 1
retw
-.Lsomezero: // There is probably some zero byte.
+.Lsomezero: /* There is probably some zero byte. */
#endif /* __XTENSA_EB__ */
.Lwne: /* Words are not equal. */
- xor a2, a8, a9 // get word with nonzero in byte that differs
- bany a2, a4, .Ldiff0 // if byte 0 differs
- movi a5, MASK1 // mask for byte 1
- bnone a8, a4, .Leq // if byte 0 is zero
- bany a2, a5, .Ldiff1 // if byte 1 differs
- movi a6, MASK2 // mask for byte 2
- bnone a8, a5, .Leq // if byte 1 is zero
- bany a2, a6, .Ldiff2 // if byte 2 differs
- bnone a8, a6, .Leq // if byte 2 is zero
+ xor a2, a8, a9 /* get word with nonzero in byte that differs */
+ bany a2, a4, .Ldiff0 /* if byte 0 differs */
+ movi a5, MASK1 /* mask for byte 1 */
+ bnone a8, a4, .Leq /* if byte 0 is zero */
+ bany a2, a5, .Ldiff1 /* if byte 1 differs */
+ movi a6, MASK2 /* mask for byte 2 */
+ bnone a8, a5, .Leq /* if byte 1 is zero */
+ bany a2, a6, .Ldiff2 /* if byte 2 differs */
+ bnone a8, a6, .Leq /* if byte 2 is zero */
#ifdef __XTENSA_EB__
.Ldiff3:
.Ldiff2: