|
|
|
|
# commit 8a7413f9b036da83ffde491a37d9d2340bc321a7
|
|
|
|
|
# Author: Alan Modra <amodra@gmail.com>
|
|
|
|
|
# Date: Sat Aug 17 18:41:17 2013 +0930
|
|
|
|
|
#
|
|
|
|
|
# PowerPC LE strcmp and strncmp
|
|
|
|
|
# http://sourceware.org/ml/libc-alpha/2013-08/msg00099.html
|
|
|
|
|
#
|
|
|
|
|
# More little-endian support. I leave the main strcmp loops unchanged,
|
|
|
|
|
# (well, except for renumbering rTMP to something other than r0 since
|
|
|
|
|
# it's needed in an addi insn) and modify the tail for little-endian.
|
|
|
|
|
#
|
|
|
|
|
# I noticed some of the big-endian tail code was a little untidy so have
|
|
|
|
|
# cleaned that up too.
|
|
|
|
|
#
|
|
|
|
|
# * sysdeps/powerpc/powerpc64/strcmp.S (rTMP2): Define as r0.
|
|
|
|
|
# (rTMP): Define as r11.
|
|
|
|
|
# (strcmp): Add little-endian support. Optimise tail.
|
|
|
|
|
# * sysdeps/powerpc/powerpc32/strcmp.S: Similarly.
|
|
|
|
|
# * sysdeps/powerpc/powerpc64/strncmp.S: Likewise.
|
|
|
|
|
# * sysdeps/powerpc/powerpc32/strncmp.S: Likewise.
|
|
|
|
|
# * sysdeps/powerpc/powerpc64/power4/strncmp.S: Likewise.
|
|
|
|
|
# * sysdeps/powerpc/powerpc32/power4/strncmp.S: Likewise.
|
|
|
|
|
# * sysdeps/powerpc/powerpc64/power7/strncmp.S: Likewise.
|
|
|
|
|
# * sysdeps/powerpc/powerpc32/power7/strncmp.S: Likewise.
|
|
|
|
|
#
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
|
|
@@ -26,7 +26,7 @@
|
|
|
|
|
|
|
|
|
|
EALIGN (BP_SYM(strncmp), 4, 0)
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -42,6 +42,7 @@
|
|
|
|
|
#define r7F7F r9 /* constant 0x7f7f7f7f */
|
|
|
|
|
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r12
|
|
|
|
|
|
|
|
|
|
dcbt 0,rSTR1
|
|
|
|
|
or rTMP, rSTR2, rSTR1
|
|
|
|
|
@@ -80,12 +81,45 @@
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ slwi rTMP, rTMP, 1
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rldimi rTMP2, rWORD2, 24, 32
|
|
|
|
|
+ rldimi rTMP, rWORD1, 24, 32
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr+
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ lwz rWORD1, -4(rSTR1)
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rldimi rTMP2, rWORD2, 24, 32
|
|
|
|
|
+ rldimi rTMP, rWORD1, 24, 32
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr+
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+#else
|
|
|
|
|
L(endstring):
|
|
|
|
|
and rTMP, r7F7F, rWORD1
|
|
|
|
|
beq cr1, L(equal)
|
|
|
|
|
add rTMP, rTMP, r7F7F
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
-
|
|
|
|
|
andc rNEG, rNEG, rTMP
|
|
|
|
|
blt- L(highbit)
|
|
|
|
|
cntlzw rBITDIF, rBITDIF
|
|
|
|
|
@@ -93,28 +127,20 @@
|
|
|
|
|
addi rNEG, rNEG, 7
|
|
|
|
|
cmpw cr1, rNEG, rBITDIF
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
- blt- cr1, L(equal)
|
|
|
|
|
- srawi rRTN, rRTN, 31
|
|
|
|
|
- ori rRTN, rRTN, 1
|
|
|
|
|
- blr
|
|
|
|
|
+ bgelr+ cr1
|
|
|
|
|
L(equal):
|
|
|
|
|
li rRTN, 0
|
|
|
|
|
blr
|
|
|
|
|
|
|
|
|
|
L(different):
|
|
|
|
|
- lwzu rWORD1, -4(rSTR1)
|
|
|
|
|
+ lwz rWORD1, -4(rSTR1)
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
- blt- L(highbit)
|
|
|
|
|
- srawi rRTN, rRTN, 31
|
|
|
|
|
- ori rRTN, rRTN, 1
|
|
|
|
|
- blr
|
|
|
|
|
+ bgelr+
|
|
|
|
|
L(highbit):
|
|
|
|
|
- srwi rWORD2, rWORD2, 24
|
|
|
|
|
- srwi rWORD1, rWORD1, 24
|
|
|
|
|
- sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ ori rRTN, rWORD2, 1
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
|
|
@@ -28,7 +28,7 @@
|
|
|
|
|
|
|
|
|
|
EALIGN (BP_SYM(strncmp),5,0)
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -44,6 +44,7 @@
|
|
|
|
|
#define r7F7F r9 /* constant 0x7f7f7f7f */
|
|
|
|
|
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r12
|
|
|
|
|
|
|
|
|
|
dcbt 0,rSTR1
|
|
|
|
|
nop
|
|
|
|
|
@@ -83,13 +84,45 @@
|
|
|
|
|
/* OK. We've hit the end of the string. We need to be careful that
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ slwi rTMP, rTMP, 1
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rldimi rTMP2, rWORD2, 24, 32
|
|
|
|
|
+ rldimi rTMP, rWORD1, 24, 32
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ lwz rWORD1, -4(rSTR1)
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rldimi rTMP2, rWORD2, 24, 32
|
|
|
|
|
+ rldimi rTMP, rWORD1, 24, 32
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
|
|
|
|
|
+#else
|
|
|
|
|
L(endstring):
|
|
|
|
|
and rTMP,r7F7F,rWORD1
|
|
|
|
|
beq cr1,L(equal)
|
|
|
|
|
add rTMP,rTMP,r7F7F
|
|
|
|
|
xor. rBITDIF,rWORD1,rWORD2
|
|
|
|
|
-
|
|
|
|
|
andc rNEG,rNEG,rTMP
|
|
|
|
|
blt L(highbit)
|
|
|
|
|
cntlzw rBITDIF,rBITDIF
|
|
|
|
|
@@ -97,28 +130,20 @@
|
|
|
|
|
addi rNEG,rNEG,7
|
|
|
|
|
cmpw cr1,rNEG,rBITDIF
|
|
|
|
|
sub rRTN,rWORD1,rWORD2
|
|
|
|
|
- blt cr1,L(equal)
|
|
|
|
|
- srawi rRTN,rRTN,31
|
|
|
|
|
- ori rRTN,rRTN,1
|
|
|
|
|
- blr
|
|
|
|
|
+ bgelr cr1
|
|
|
|
|
L(equal):
|
|
|
|
|
li rRTN,0
|
|
|
|
|
blr
|
|
|
|
|
|
|
|
|
|
L(different):
|
|
|
|
|
- lwzu rWORD1,-4(rSTR1)
|
|
|
|
|
+ lwz rWORD1,-4(rSTR1)
|
|
|
|
|
xor. rBITDIF,rWORD1,rWORD2
|
|
|
|
|
sub rRTN,rWORD1,rWORD2
|
|
|
|
|
- blt L(highbit)
|
|
|
|
|
- srawi rRTN,rRTN,31
|
|
|
|
|
- ori rRTN,rRTN,1
|
|
|
|
|
- blr
|
|
|
|
|
+ bgelr
|
|
|
|
|
L(highbit):
|
|
|
|
|
- srwi rWORD2,rWORD2,24
|
|
|
|
|
- srwi rWORD1,rWORD1,24
|
|
|
|
|
- sub rRTN,rWORD1,rWORD2
|
|
|
|
|
+ ori rRTN, rWORD2, 1
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
|
|
@@ -26,7 +26,7 @@
|
|
|
|
|
|
|
|
|
|
EALIGN (BP_SYM (strcmp), 4, 0)
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -40,6 +40,7 @@
|
|
|
|
|
#define r7F7F r8 /* constant 0x7f7f7f7f */
|
|
|
|
|
#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r10 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r11
|
|
|
|
|
|
|
|
|
|
CHECK_BOUNDS_LOW (rSTR1, rTMP, rHIGH1)
|
|
|
|
|
CHECK_BOUNDS_LOW (rSTR2, rTMP, rHIGH2)
|
|
|
|
|
@@ -64,10 +65,45 @@
|
|
|
|
|
and. rTMP, rTMP, rNEG
|
|
|
|
|
cmpw cr1, rWORD1, rWORD2
|
|
|
|
|
beq+ L(g0)
|
|
|
|
|
-L(endstring):
|
|
|
|
|
+
|
|
|
|
|
/* OK. We've hit the end of the string. We need to be careful that
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ rlwimi rTMP2, rTMP2, 1, 0, 30
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr+
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ lwz rWORD1, -4(rSTR1)
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr+
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+#else
|
|
|
|
|
+L(endstring):
|
|
|
|
|
and rTMP, r7F7F, rWORD1
|
|
|
|
|
beq cr1, L(equal)
|
|
|
|
|
add rTMP, rTMP, r7F7F
|
|
|
|
|
@@ -94,7 +130,7 @@
|
|
|
|
|
ori rRTN, rWORD2, 1
|
|
|
|
|
/* GKM FIXME: check high bounds. */
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
|
|
@@ -26,7 +26,7 @@
|
|
|
|
|
|
|
|
|
|
EALIGN (BP_SYM(strncmp), 4, 0)
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -40,6 +40,7 @@
|
|
|
|
|
#define r7F7F r9 /* constant 0x7f7f7f7f */
|
|
|
|
|
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r12
|
|
|
|
|
|
|
|
|
|
dcbt 0,rSTR1
|
|
|
|
|
or rTMP, rSTR2, rSTR1
|
|
|
|
|
@@ -78,12 +79,45 @@
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ slwi rTMP, rTMP, 1
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr+
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ lwz rWORD1, -4(rSTR1)
|
|
|
|
|
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
|
|
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 0, 7
|
|
|
|
|
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
|
|
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
|
|
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
|
|
+ sub rRTN, rTMP, rTMP2
|
|
|
|
|
+ bgelr+
|
|
|
|
|
+ ori rRTN, rTMP2, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+#else
|
|
|
|
|
L(endstring):
|
|
|
|
|
and rTMP, r7F7F, rWORD1
|
|
|
|
|
beq cr1, L(equal)
|
|
|
|
|
add rTMP, rTMP, r7F7F
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
-
|
|
|
|
|
andc rNEG, rNEG, rTMP
|
|
|
|
|
blt- L(highbit)
|
|
|
|
|
cntlzw rBITDIF, rBITDIF
|
|
|
|
|
@@ -91,28 +125,20 @@
|
|
|
|
|
addi rNEG, rNEG, 7
|
|
|
|
|
cmpw cr1, rNEG, rBITDIF
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
- blt- cr1, L(equal)
|
|
|
|
|
- srawi rRTN, rRTN, 31
|
|
|
|
|
- ori rRTN, rRTN, 1
|
|
|
|
|
- blr
|
|
|
|
|
+ bgelr+ cr1
|
|
|
|
|
L(equal):
|
|
|
|
|
li rRTN, 0
|
|
|
|
|
blr
|
|
|
|
|
|
|
|
|
|
L(different):
|
|
|
|
|
- lwzu rWORD1, -4(rSTR1)
|
|
|
|
|
+ lwz rWORD1, -4(rSTR1)
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
- blt- L(highbit)
|
|
|
|
|
- srawi rRTN, rRTN, 31
|
|
|
|
|
- ori rRTN, rRTN, 1
|
|
|
|
|
- blr
|
|
|
|
|
+ bgelr+
|
|
|
|
|
L(highbit):
|
|
|
|
|
- srwi rWORD2, rWORD2, 24
|
|
|
|
|
- srwi rWORD1, rWORD1, 24
|
|
|
|
|
- sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ ori rRTN, rWORD2, 1
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
|
|
@@ -27,7 +27,7 @@
|
|
|
|
|
EALIGN (BP_SYM(strncmp), 4, 0)
|
|
|
|
|
CALL_MCOUNT 3
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -43,6 +43,7 @@
|
|
|
|
|
#define r7F7F r9 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
|
|
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r12
|
|
|
|
|
|
|
|
|
|
dcbt 0,rSTR1
|
|
|
|
|
or rTMP, rSTR2, rSTR1
|
|
|
|
|
@@ -84,12 +85,59 @@
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ cmpd cr1, rWORD1, rWORD2
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
|
|
+ neg rNEG, rBITDIF
|
|
|
|
|
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
|
|
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
|
|
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
|
|
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
|
|
+ sld rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt- L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(equal):
|
|
|
|
|
+ li rRTN, 0
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ ld rWORD1, -8(rSTR1)
|
|
|
|
|
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
|
|
+ neg rNEG, rBITDIF
|
|
|
|
|
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
|
|
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
|
|
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
|
|
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
|
|
+ sld rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt- L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(highbit):
|
|
|
|
|
+ sradi rRTN, rWORD2, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+#else
|
|
|
|
|
L(endstring):
|
|
|
|
|
and rTMP, r7F7F, rWORD1
|
|
|
|
|
beq cr1, L(equal)
|
|
|
|
|
add rTMP, rTMP, r7F7F
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
-
|
|
|
|
|
andc rNEG, rNEG, rTMP
|
|
|
|
|
blt- L(highbit)
|
|
|
|
|
cntlzd rBITDIF, rBITDIF
|
|
|
|
|
@@ -98,7 +146,7 @@
|
|
|
|
|
cmpd cr1, rNEG, rBITDIF
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
blt- cr1, L(equal)
|
|
|
|
|
- sradi rRTN, rRTN, 63
|
|
|
|
|
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
|
|
ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
L(equal):
|
|
|
|
|
@@ -106,7 +154,7 @@
|
|
|
|
|
blr
|
|
|
|
|
|
|
|
|
|
L(different):
|
|
|
|
|
- ldu rWORD1, -8(rSTR1)
|
|
|
|
|
+ ld rWORD1, -8(rSTR1)
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
blt- L(highbit)
|
|
|
|
|
@@ -114,11 +162,10 @@
|
|
|
|
|
ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
L(highbit):
|
|
|
|
|
- srdi rWORD2, rWORD2, 56
|
|
|
|
|
- srdi rWORD1, rWORD1, 56
|
|
|
|
|
- sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ sradi rRTN, rWORD2, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
|
|
@@ -29,7 +29,7 @@
|
|
|
|
|
EALIGN (BP_SYM(strncmp),5,0)
|
|
|
|
|
CALL_MCOUNT 3
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -45,6 +45,7 @@
|
|
|
|
|
#define r7F7F r9 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
|
|
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r12
|
|
|
|
|
|
|
|
|
|
dcbt 0,rSTR1
|
|
|
|
|
nop
|
|
|
|
|
@@ -88,12 +89,57 @@
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ cmpd cr1, rWORD1, rWORD2
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ cmpb rBITDIF, rWORD1, rWORD2 /* 0xff on equal bytes. */
|
|
|
|
|
+ addi rNEG, rBITDIF, 1
|
|
|
|
|
+ orc rNEG, rNEG, rBITDIF /* 0's below LS differing byte. */
|
|
|
|
|
+ sldi rNEG, rNEG, 8 /* 1's above LS differing byte. */
|
|
|
|
|
+ andc rWORD1, rWORD1, rNEG /* mask off MS bytes. */
|
|
|
|
|
+ andc rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(equal):
|
|
|
|
|
+ li rRTN, 0
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ ld rWORD1, -8(rSTR1)
|
|
|
|
|
+ cmpb rBITDIF, rWORD1, rWORD2 /* 0xff on equal bytes. */
|
|
|
|
|
+ addi rNEG, rBITDIF, 1
|
|
|
|
|
+ orc rNEG, rNEG, rBITDIF /* 0's below LS differing byte. */
|
|
|
|
|
+ sldi rNEG, rNEG, 8 /* 1's above LS differing byte. */
|
|
|
|
|
+ andc rWORD1, rWORD1, rNEG /* mask off MS bytes. */
|
|
|
|
|
+ andc rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(highbit):
|
|
|
|
|
+ sradi rRTN, rWORD2, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+#else
|
|
|
|
|
L(endstring):
|
|
|
|
|
and rTMP,r7F7F,rWORD1
|
|
|
|
|
beq cr1,L(equal)
|
|
|
|
|
add rTMP,rTMP,r7F7F
|
|
|
|
|
xor. rBITDIF,rWORD1,rWORD2
|
|
|
|
|
-
|
|
|
|
|
andc rNEG,rNEG,rTMP
|
|
|
|
|
blt L(highbit)
|
|
|
|
|
cntlzd rBITDIF,rBITDIF
|
|
|
|
|
@@ -102,7 +148,7 @@
|
|
|
|
|
cmpd cr1,rNEG,rBITDIF
|
|
|
|
|
sub rRTN,rWORD1,rWORD2
|
|
|
|
|
blt cr1,L(equal)
|
|
|
|
|
- sradi rRTN,rRTN,63
|
|
|
|
|
+ sradi rRTN,rRTN,63 /* must return an int. */
|
|
|
|
|
ori rRTN,rRTN,1
|
|
|
|
|
blr
|
|
|
|
|
L(equal):
|
|
|
|
|
@@ -110,7 +156,7 @@
|
|
|
|
|
blr
|
|
|
|
|
|
|
|
|
|
L(different):
|
|
|
|
|
- ldu rWORD1,-8(rSTR1)
|
|
|
|
|
+ ld rWORD1,-8(rSTR1)
|
|
|
|
|
xor. rBITDIF,rWORD1,rWORD2
|
|
|
|
|
sub rRTN,rWORD1,rWORD2
|
|
|
|
|
blt L(highbit)
|
|
|
|
|
@@ -118,11 +164,10 @@
|
|
|
|
|
ori rRTN,rRTN,1
|
|
|
|
|
blr
|
|
|
|
|
L(highbit):
|
|
|
|
|
- srdi rWORD2,rWORD2,56
|
|
|
|
|
- srdi rWORD1,rWORD1,56
|
|
|
|
|
- sub rRTN,rWORD1,rWORD2
|
|
|
|
|
+ sradi rRTN,rWORD2,63
|
|
|
|
|
+ ori rRTN,rRTN,1
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S 2014-05-28 13:37:15.000000000 -0500
|
|
|
|
|
@@ -27,7 +27,7 @@
|
|
|
|
|
EALIGN (BP_SYM(strcmp), 4, 0)
|
|
|
|
|
CALL_MCOUNT 2
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -46,6 +46,7 @@
|
|
|
|
|
#define r7F7F r8 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
|
|
#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r10 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r11
|
|
|
|
|
|
|
|
|
|
CHECK_BOUNDS_LOW (rSTR1, rTMP, rHIGH1)
|
|
|
|
|
CHECK_BOUNDS_LOW (rSTR2, rTMP, rHIGH2)
|
|
|
|
|
@@ -72,19 +73,66 @@
|
|
|
|
|
ldu rWORD2, 8(rSTR2)
|
|
|
|
|
L(g1): add rTMP, rFEFE, rWORD1
|
|
|
|
|
nor rNEG, r7F7F, rWORD1
|
|
|
|
|
-
|
|
|
|
|
and. rTMP, rTMP, rNEG
|
|
|
|
|
cmpd cr1, rWORD1, rWORD2
|
|
|
|
|
beq+ L(g0)
|
|
|
|
|
-L(endstring):
|
|
|
|
|
+
|
|
|
|
|
/* OK. We've hit the end of the string. We need to be careful that
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ cmpd cr1, rWORD1, rWORD2
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
|
|
+ neg rNEG, rBITDIF
|
|
|
|
|
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
|
|
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
|
|
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
|
|
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
|
|
+ sld rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt- L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(equal):
|
|
|
|
|
+ li rRTN, 0
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ ld rWORD1, -8(rSTR1)
|
|
|
|
|
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
|
|
+ neg rNEG, rBITDIF
|
|
|
|
|
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
|
|
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
|
|
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
|
|
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
|
|
+ sld rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt- L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(highbit):
|
|
|
|
|
+ sradi rRTN, rWORD2, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+#else
|
|
|
|
|
+L(endstring):
|
|
|
|
|
and rTMP, r7F7F, rWORD1
|
|
|
|
|
beq cr1, L(equal)
|
|
|
|
|
add rTMP, rTMP, r7F7F
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
-
|
|
|
|
|
andc rNEG, rNEG, rTMP
|
|
|
|
|
blt- L(highbit)
|
|
|
|
|
cntlzd rBITDIF, rBITDIF
|
|
|
|
|
@@ -93,7 +141,7 @@
|
|
|
|
|
cmpd cr1, rNEG, rBITDIF
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
blt- cr1, L(equal)
|
|
|
|
|
- sradi rRTN, rRTN, 63
|
|
|
|
|
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
|
|
ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
L(equal):
|
|
|
|
|
@@ -110,12 +158,11 @@
|
|
|
|
|
ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
L(highbit):
|
|
|
|
|
- srdi rWORD2, rWORD2, 56
|
|
|
|
|
- srdi rWORD1, rWORD1, 56
|
|
|
|
|
- sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ sradi rRTN, rWORD2, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
/* GKM FIXME: check high bounds. */
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
|
|
|
|
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S
|
|
|
|
|
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
|
|
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S 2014-05-28 13:38:31.000000000 -0500
|
|
|
|
|
@@ -27,7 +27,7 @@
|
|
|
|
|
EALIGN (BP_SYM(strncmp), 4, 0)
|
|
|
|
|
CALL_MCOUNT 3
|
|
|
|
|
|
|
|
|
|
-#define rTMP r0
|
|
|
|
|
+#define rTMP2 r0
|
|
|
|
|
#define rRTN r3
|
|
|
|
|
#define rSTR1 r3 /* first string arg */
|
|
|
|
|
#define rSTR2 r4 /* second string arg */
|
|
|
|
|
@@ -41,6 +41,7 @@
|
|
|
|
|
#define r7F7F r9 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
|
|
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
|
|
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
|
|
+#define rTMP r12
|
|
|
|
|
|
|
|
|
|
dcbt 0,rSTR1
|
|
|
|
|
or rTMP, rSTR2, rSTR1
|
|
|
|
|
@@ -81,13 +82,60 @@
|
|
|
|
|
/* OK. We've hit the end of the string. We need to be careful that
|
|
|
|
|
we don't compare two strings as different because of gunk beyond
|
|
|
|
|
the end of the strings... */
|
|
|
|
|
-
|
|
|
|
|
+
|
|
|
|
|
+#ifdef __LITTLE_ENDIAN__
|
|
|
|
|
+L(endstring):
|
|
|
|
|
+ addi rTMP2, rTMP, -1
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ andc rTMP2, rTMP2, rTMP
|
|
|
|
|
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
|
|
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
|
|
+ and rWORD1, rWORD1, rTMP2
|
|
|
|
|
+ cmpd cr1, rWORD1, rWORD2
|
|
|
|
|
+ beq cr1, L(equal)
|
|
|
|
|
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
|
|
+ neg rNEG, rBITDIF
|
|
|
|
|
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
|
|
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
|
|
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
|
|
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
|
|
+ sld rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt- L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(equal):
|
|
|
|
|
+ li rRTN, 0
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+L(different):
|
|
|
|
|
+ ld rWORD1, -8(rSTR1)
|
|
|
|
|
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
|
|
+ neg rNEG, rBITDIF
|
|
|
|
|
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
|
|
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
|
|
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
|
|
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
|
|
+ sld rWORD2, rWORD2, rNEG
|
|
|
|
|
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
+ sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ blt- L(highbit)
|
|
|
|
|
+ sradi rRTN, rRTN, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+L(highbit):
|
|
|
|
|
+ sradi rRTN, rWORD2, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
+ blr
|
|
|
|
|
+
|
|
|
|
|
+#else
|
|
|
|
|
L(endstring):
|
|
|
|
|
and rTMP, r7F7F, rWORD1
|
|
|
|
|
beq cr1, L(equal)
|
|
|
|
|
add rTMP, rTMP, r7F7F
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
-
|
|
|
|
|
andc rNEG, rNEG, rTMP
|
|
|
|
|
blt- L(highbit)
|
|
|
|
|
cntlzd rBITDIF, rBITDIF
|
|
|
|
|
@@ -96,7 +144,7 @@
|
|
|
|
|
cmpd cr1, rNEG, rBITDIF
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
blt- cr1, L(equal)
|
|
|
|
|
- sradi rRTN, rRTN, 63
|
|
|
|
|
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
|
|
ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
L(equal):
|
|
|
|
|
@@ -104,7 +152,7 @@
|
|
|
|
|
blr
|
|
|
|
|
|
|
|
|
|
L(different):
|
|
|
|
|
- ldu rWORD1, -8(rSTR1)
|
|
|
|
|
+ ld rWORD1, -8(rSTR1)
|
|
|
|
|
xor. rBITDIF, rWORD1, rWORD2
|
|
|
|
|
sub rRTN, rWORD1, rWORD2
|
|
|
|
|
blt- L(highbit)
|
|
|
|
|
@@ -112,11 +160,10 @@
|
|
|
|
|
ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
L(highbit):
|
|
|
|
|
- srdi rWORD2, rWORD2, 56
|
|
|
|
|
- srdi rWORD1, rWORD1, 56
|
|
|
|
|
- sub rRTN, rWORD1, rWORD2
|
|
|
|
|
+ sradi rRTN, rWORD2, 63
|
|
|
|
|
+ ori rRTN, rRTN, 1
|
|
|
|
|
blr
|
|
|
|
|
-
|
|
|
|
|
+#endif
|
|
|
|
|
|
|
|
|
|
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
|
|
.align 4
|
