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# commit 8a7413f9b036da83ffde491a37d9d2340bc321a7
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# Author: Alan Modra <amodra@gmail.com>
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# Date: Sat Aug 17 18:41:17 2013 +0930
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#
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# PowerPC LE strcmp and strncmp
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# http://sourceware.org/ml/libc-alpha/2013-08/msg00099.html
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#
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# More little-endian support. I leave the main strcmp loops unchanged,
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# (well, except for renumbering rTMP to something other than r0 since
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# it's needed in an addi insn) and modify the tail for little-endian.
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#
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# I noticed some of the big-endian tail code was a little untidy so have
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# cleaned that up too.
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#
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# * sysdeps/powerpc/powerpc64/strcmp.S (rTMP2): Define as r0.
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# (rTMP): Define as r11.
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# (strcmp): Add little-endian support. Optimise tail.
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# * sysdeps/powerpc/powerpc32/strcmp.S: Similarly.
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# * sysdeps/powerpc/powerpc64/strncmp.S: Likewise.
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# * sysdeps/powerpc/powerpc32/strncmp.S: Likewise.
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# * sysdeps/powerpc/powerpc64/power4/strncmp.S: Likewise.
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# * sysdeps/powerpc/powerpc32/power4/strncmp.S: Likewise.
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# * sysdeps/powerpc/powerpc64/power7/strncmp.S: Likewise.
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# * sysdeps/powerpc/powerpc32/power7/strncmp.S: Likewise.
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#
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S 2014-05-28 13:26:59.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power4/strncmp.S 2014-05-28 13:27:02.000000000 -0500
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@@ -26,7 +26,7 @@
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EALIGN (BP_SYM(strncmp), 4, 0)
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-#define rTMP r0
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+#define rTMP2 r0
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#define rRTN r3
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#define rSTR1 r3 /* first string arg */
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#define rSTR2 r4 /* second string arg */
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@@ -42,6 +42,7 @@
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#define r7F7F r9 /* constant 0x7f7f7f7f */
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#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */
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#define rBITDIF r11 /* bits that differ in s1 & s2 words */
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+#define rTMP r12
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dcbt 0,rSTR1
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or rTMP, rSTR2, rSTR1
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@@ -80,12 +81,45 @@
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we don't compare two strings as different because of gunk beyond
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the end of the strings... */
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+#ifdef __LITTLE_ENDIAN__
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+L(endstring):
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+ slwi rTMP, rTMP, 1
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+ addi rTMP2, rTMP, -1
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+ andc rTMP2, rTMP2, rTMP
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+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
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+ and rWORD1, rWORD1, rTMP2
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+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
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+ rlwinm rTMP, rWORD1, 8, 0xffffffff
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+ rldimi rTMP2, rWORD2, 24, 32
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+ rldimi rTMP, rWORD1, 24, 32
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+ rlwimi rTMP2, rWORD2, 24, 16, 23
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+ rlwimi rTMP, rWORD1, 24, 16, 23
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+ xor. rBITDIF, rTMP, rTMP2
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+ sub rRTN, rTMP, rTMP2
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+ bgelr+
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+ ori rRTN, rTMP2, 1
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+ blr
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+
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+L(different):
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+ lwz rWORD1, -4(rSTR1)
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+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
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+ rlwinm rTMP, rWORD1, 8, 0xffffffff
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+ rldimi rTMP2, rWORD2, 24, 32
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+ rldimi rTMP, rWORD1, 24, 32
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+ rlwimi rTMP2, rWORD2, 24, 16, 23
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+ rlwimi rTMP, rWORD1, 24, 16, 23
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+ xor. rBITDIF, rTMP, rTMP2
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+ sub rRTN, rTMP, rTMP2
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+ bgelr+
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+ ori rRTN, rTMP2, 1
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+ blr
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+
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+#else
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L(endstring):
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and rTMP, r7F7F, rWORD1
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beq cr1, L(equal)
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add rTMP, rTMP, r7F7F
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xor. rBITDIF, rWORD1, rWORD2
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-
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andc rNEG, rNEG, rTMP
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blt- L(highbit)
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cntlzw rBITDIF, rBITDIF
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@@ -93,28 +127,20 @@
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addi rNEG, rNEG, 7
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cmpw cr1, rNEG, rBITDIF
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sub rRTN, rWORD1, rWORD2
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- blt- cr1, L(equal)
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- srawi rRTN, rRTN, 31
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- ori rRTN, rRTN, 1
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- blr
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+ bgelr+ cr1
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L(equal):
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li rRTN, 0
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blr
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L(different):
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- lwzu rWORD1, -4(rSTR1)
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+ lwz rWORD1, -4(rSTR1)
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xor. rBITDIF, rWORD1, rWORD2
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sub rRTN, rWORD1, rWORD2
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- blt- L(highbit)
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- srawi rRTN, rRTN, 31
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- ori rRTN, rRTN, 1
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- blr
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+ bgelr+
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L(highbit):
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- srwi rWORD2, rWORD2, 24
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- srwi rWORD1, rWORD1, 24
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- sub rRTN, rWORD1, rWORD2
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+ ori rRTN, rWORD2, 1
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blr
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-
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+#endif
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/* Oh well. In this case, we just do a byte-by-byte comparison. */
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.align 4
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S 2014-05-28 13:26:59.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/power7/strncmp.S 2014-05-28 13:27:02.000000000 -0500
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@@ -28,7 +28,7 @@
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EALIGN (BP_SYM(strncmp),5,0)
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-#define rTMP r0
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+#define rTMP2 r0
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#define rRTN r3
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#define rSTR1 r3 /* first string arg */
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#define rSTR2 r4 /* second string arg */
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@@ -44,6 +44,7 @@
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#define r7F7F r9 /* constant 0x7f7f7f7f */
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#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */
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#define rBITDIF r11 /* bits that differ in s1 & s2 words */
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+#define rTMP r12
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dcbt 0,rSTR1
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nop
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@@ -83,13 +84,45 @@
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/* OK. We've hit the end of the string. We need to be careful that
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we don't compare two strings as different because of gunk beyond
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the end of the strings... */
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+#ifdef __LITTLE_ENDIAN__
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+L(endstring):
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+ slwi rTMP, rTMP, 1
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+ addi rTMP2, rTMP, -1
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+ andc rTMP2, rTMP2, rTMP
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+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
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+ and rWORD1, rWORD1, rTMP2
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+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
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+ rlwinm rTMP, rWORD1, 8, 0xffffffff
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+ rldimi rTMP2, rWORD2, 24, 32
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+ rldimi rTMP, rWORD1, 24, 32
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+ rlwimi rTMP2, rWORD2, 24, 16, 23
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+ rlwimi rTMP, rWORD1, 24, 16, 23
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+ xor. rBITDIF, rTMP, rTMP2
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+ sub rRTN, rTMP, rTMP2
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+ bgelr
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+ ori rRTN, rTMP2, 1
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+ blr
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+
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+L(different):
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+ lwz rWORD1, -4(rSTR1)
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+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
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+ rlwinm rTMP, rWORD1, 8, 0xffffffff
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+ rldimi rTMP2, rWORD2, 24, 32
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+ rldimi rTMP, rWORD1, 24, 32
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+ rlwimi rTMP2, rWORD2, 24, 16, 23
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+ rlwimi rTMP, rWORD1, 24, 16, 23
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+ xor. rBITDIF, rTMP, rTMP2
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+ sub rRTN, rTMP, rTMP2
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+ bgelr
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+ ori rRTN, rTMP2, 1
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+ blr
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+#else
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L(endstring):
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and rTMP,r7F7F,rWORD1
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beq cr1,L(equal)
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add rTMP,rTMP,r7F7F
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xor. rBITDIF,rWORD1,rWORD2
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-
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andc rNEG,rNEG,rTMP
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blt L(highbit)
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cntlzw rBITDIF,rBITDIF
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@@ -97,28 +130,20 @@
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addi rNEG,rNEG,7
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cmpw cr1,rNEG,rBITDIF
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sub rRTN,rWORD1,rWORD2
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- blt cr1,L(equal)
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- srawi rRTN,rRTN,31
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- ori rRTN,rRTN,1
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- blr
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+ bgelr cr1
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L(equal):
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li rRTN,0
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blr
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L(different):
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- lwzu rWORD1,-4(rSTR1)
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+ lwz rWORD1,-4(rSTR1)
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xor. rBITDIF,rWORD1,rWORD2
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sub rRTN,rWORD1,rWORD2
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- blt L(highbit)
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- srawi rRTN,rRTN,31
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- ori rRTN,rRTN,1
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- blr
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+ bgelr
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L(highbit):
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- srwi rWORD2,rWORD2,24
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- srwi rWORD1,rWORD1,24
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- sub rRTN,rWORD1,rWORD2
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+ ori rRTN, rWORD2, 1
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blr
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-
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+#endif
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/* Oh well. In this case, we just do a byte-by-byte comparison. */
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.align 4
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S 2014-05-28 13:26:59.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcmp.S 2014-05-28 13:27:02.000000000 -0500
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@@ -26,7 +26,7 @@
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EALIGN (BP_SYM (strcmp), 4, 0)
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-#define rTMP r0
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+#define rTMP2 r0
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#define rRTN r3
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#define rSTR1 r3 /* first string arg */
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#define rSTR2 r4 /* second string arg */
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@@ -40,6 +40,7 @@
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#define r7F7F r8 /* constant 0x7f7f7f7f */
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#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f) */
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#define rBITDIF r10 /* bits that differ in s1 & s2 words */
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+#define rTMP r11
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CHECK_BOUNDS_LOW (rSTR1, rTMP, rHIGH1)
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CHECK_BOUNDS_LOW (rSTR2, rTMP, rHIGH2)
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@@ -64,10 +65,45 @@
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and. rTMP, rTMP, rNEG
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cmpw cr1, rWORD1, rWORD2
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beq+ L(g0)
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-L(endstring):
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+
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/* OK. We've hit the end of the string. We need to be careful that
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we don't compare two strings as different because of gunk beyond
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the end of the strings... */
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+#ifdef __LITTLE_ENDIAN__
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+L(endstring):
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+ addi rTMP2, rTMP, -1
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+ andc rTMP2, rTMP2, rTMP
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+ rlwimi rTMP2, rTMP2, 1, 0, 30
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+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
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+ and rWORD1, rWORD1, rTMP2
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+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
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+ rlwinm rTMP, rWORD1, 8, 0xffffffff
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+ rlwimi rTMP2, rWORD2, 24, 0, 7
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+ rlwimi rTMP, rWORD1, 24, 0, 7
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+ rlwimi rTMP2, rWORD2, 24, 16, 23
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+ rlwimi rTMP, rWORD1, 24, 16, 23
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+ xor. rBITDIF, rTMP, rTMP2
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+ sub rRTN, rTMP, rTMP2
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+ bgelr+
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+ ori rRTN, rTMP2, 1
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+ blr
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+
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+L(different):
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+ lwz rWORD1, -4(rSTR1)
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|
147e83 |
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
147e83 |
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
147e83 |
+ rlwimi rTMP2, rWORD2, 24, 0, 7
|
|
|
147e83 |
+ rlwimi rTMP, rWORD1, 24, 0, 7
|
|
|
147e83 |
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
147e83 |
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
147e83 |
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
147e83 |
+ sub rRTN, rTMP, rTMP2
|
|
|
147e83 |
+ bgelr+
|
|
|
147e83 |
+ ori rRTN, rTMP2, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+#else
|
|
|
147e83 |
+L(endstring):
|
|
|
147e83 |
and rTMP, r7F7F, rWORD1
|
|
|
147e83 |
beq cr1, L(equal)
|
|
|
147e83 |
add rTMP, rTMP, r7F7F
|
|
|
147e83 |
@@ -94,7 +130,7 @@
|
|
|
147e83 |
ori rRTN, rWORD2, 1
|
|
|
147e83 |
/* GKM FIXME: check high bounds. */
|
|
|
147e83 |
blr
|
|
|
147e83 |
-
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
|
|
|
147e83 |
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
147e83 |
.align 4
|
|
|
147e83 |
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S
|
|
|
147e83 |
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
147e83 |
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
147e83 |
@@ -26,7 +26,7 @@
|
|
|
147e83 |
|
|
|
147e83 |
EALIGN (BP_SYM(strncmp), 4, 0)
|
|
|
147e83 |
|
|
|
147e83 |
-#define rTMP r0
|
|
|
147e83 |
+#define rTMP2 r0
|
|
|
147e83 |
#define rRTN r3
|
|
|
147e83 |
#define rSTR1 r3 /* first string arg */
|
|
|
147e83 |
#define rSTR2 r4 /* second string arg */
|
|
|
147e83 |
@@ -40,6 +40,7 @@
|
|
|
147e83 |
#define r7F7F r9 /* constant 0x7f7f7f7f */
|
|
|
147e83 |
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f) */
|
|
|
147e83 |
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
147e83 |
+#define rTMP r12
|
|
|
147e83 |
|
|
|
147e83 |
dcbt 0,rSTR1
|
|
|
147e83 |
or rTMP, rSTR2, rSTR1
|
|
|
147e83 |
@@ -78,12 +79,45 @@
|
|
|
147e83 |
we don't compare two strings as different because of gunk beyond
|
|
|
147e83 |
the end of the strings... */
|
|
|
147e83 |
|
|
|
147e83 |
+#ifdef __LITTLE_ENDIAN__
|
|
|
147e83 |
+L(endstring):
|
|
|
147e83 |
+ slwi rTMP, rTMP, 1
|
|
|
147e83 |
+ addi rTMP2, rTMP, -1
|
|
|
147e83 |
+ andc rTMP2, rTMP2, rTMP
|
|
|
147e83 |
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
147e83 |
+ and rWORD1, rWORD1, rTMP2
|
|
|
147e83 |
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
147e83 |
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
147e83 |
+ rlwimi rTMP2, rWORD2, 24, 0, 7
|
|
|
147e83 |
+ rlwimi rTMP, rWORD1, 24, 0, 7
|
|
|
147e83 |
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
147e83 |
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
147e83 |
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
147e83 |
+ sub rRTN, rTMP, rTMP2
|
|
|
147e83 |
+ bgelr+
|
|
|
147e83 |
+ ori rRTN, rTMP2, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+L(different):
|
|
|
147e83 |
+ lwz rWORD1, -4(rSTR1)
|
|
|
147e83 |
+ rlwinm rTMP2, rWORD2, 8, 0xffffffff /* Byte reverse word. */
|
|
|
147e83 |
+ rlwinm rTMP, rWORD1, 8, 0xffffffff
|
|
|
147e83 |
+ rlwimi rTMP2, rWORD2, 24, 0, 7
|
|
|
147e83 |
+ rlwimi rTMP, rWORD1, 24, 0, 7
|
|
|
147e83 |
+ rlwimi rTMP2, rWORD2, 24, 16, 23
|
|
|
147e83 |
+ rlwimi rTMP, rWORD1, 24, 16, 23
|
|
|
147e83 |
+ xor. rBITDIF, rTMP, rTMP2
|
|
|
147e83 |
+ sub rRTN, rTMP, rTMP2
|
|
|
147e83 |
+ bgelr+
|
|
|
147e83 |
+ ori rRTN, rTMP2, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+#else
|
|
|
147e83 |
L(endstring):
|
|
|
147e83 |
and rTMP, r7F7F, rWORD1
|
|
|
147e83 |
beq cr1, L(equal)
|
|
|
147e83 |
add rTMP, rTMP, r7F7F
|
|
|
147e83 |
xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
-
|
|
|
147e83 |
andc rNEG, rNEG, rTMP
|
|
|
147e83 |
blt- L(highbit)
|
|
|
147e83 |
cntlzw rBITDIF, rBITDIF
|
|
|
147e83 |
@@ -91,28 +125,20 @@
|
|
|
147e83 |
addi rNEG, rNEG, 7
|
|
|
147e83 |
cmpw cr1, rNEG, rBITDIF
|
|
|
147e83 |
sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
- blt- cr1, L(equal)
|
|
|
147e83 |
- srawi rRTN, rRTN, 31
|
|
|
147e83 |
- ori rRTN, rRTN, 1
|
|
|
147e83 |
- blr
|
|
|
147e83 |
+ bgelr+ cr1
|
|
|
147e83 |
L(equal):
|
|
|
147e83 |
li rRTN, 0
|
|
|
147e83 |
blr
|
|
|
147e83 |
|
|
|
147e83 |
L(different):
|
|
|
147e83 |
- lwzu rWORD1, -4(rSTR1)
|
|
|
147e83 |
+ lwz rWORD1, -4(rSTR1)
|
|
|
147e83 |
xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
- blt- L(highbit)
|
|
|
147e83 |
- srawi rRTN, rRTN, 31
|
|
|
147e83 |
- ori rRTN, rRTN, 1
|
|
|
147e83 |
- blr
|
|
|
147e83 |
+ bgelr+
|
|
|
147e83 |
L(highbit):
|
|
|
147e83 |
- srwi rWORD2, rWORD2, 24
|
|
|
147e83 |
- srwi rWORD1, rWORD1, 24
|
|
|
147e83 |
- sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ ori rRTN, rWORD2, 1
|
|
|
147e83 |
blr
|
|
|
147e83 |
-
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
|
|
|
147e83 |
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
147e83 |
.align 4
|
|
|
147e83 |
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S
|
|
|
147e83 |
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
147e83 |
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power4/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
147e83 |
@@ -27,7 +27,7 @@
|
|
|
147e83 |
EALIGN (BP_SYM(strncmp), 4, 0)
|
|
|
147e83 |
CALL_MCOUNT 3
|
|
|
147e83 |
|
|
|
147e83 |
-#define rTMP r0
|
|
|
147e83 |
+#define rTMP2 r0
|
|
|
147e83 |
#define rRTN r3
|
|
|
147e83 |
#define rSTR1 r3 /* first string arg */
|
|
|
147e83 |
#define rSTR2 r4 /* second string arg */
|
|
|
147e83 |
@@ -43,6 +43,7 @@
|
|
|
147e83 |
#define r7F7F r9 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
147e83 |
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
147e83 |
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
147e83 |
+#define rTMP r12
|
|
|
147e83 |
|
|
|
147e83 |
dcbt 0,rSTR1
|
|
|
147e83 |
or rTMP, rSTR2, rSTR1
|
|
|
147e83 |
@@ -84,12 +85,59 @@
|
|
|
147e83 |
we don't compare two strings as different because of gunk beyond
|
|
|
147e83 |
the end of the strings... */
|
|
|
147e83 |
|
|
|
147e83 |
+#ifdef __LITTLE_ENDIAN__
|
|
|
147e83 |
+L(endstring):
|
|
|
147e83 |
+ addi rTMP2, rTMP, -1
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ andc rTMP2, rTMP2, rTMP
|
|
|
147e83 |
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
147e83 |
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
147e83 |
+ and rWORD1, rWORD1, rTMP2
|
|
|
147e83 |
+ cmpd cr1, rWORD1, rWORD2
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
147e83 |
+ neg rNEG, rBITDIF
|
|
|
147e83 |
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
147e83 |
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
147e83 |
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
147e83 |
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
147e83 |
+ sld rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt- L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(equal):
|
|
|
147e83 |
+ li rRTN, 0
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+L(different):
|
|
|
147e83 |
+ ld rWORD1, -8(rSTR1)
|
|
|
147e83 |
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
147e83 |
+ neg rNEG, rBITDIF
|
|
|
147e83 |
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
147e83 |
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
147e83 |
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
147e83 |
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
147e83 |
+ sld rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt- L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(highbit):
|
|
|
147e83 |
+ sradi rRTN, rWORD2, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+#else
|
|
|
147e83 |
L(endstring):
|
|
|
147e83 |
and rTMP, r7F7F, rWORD1
|
|
|
147e83 |
beq cr1, L(equal)
|
|
|
147e83 |
add rTMP, rTMP, r7F7F
|
|
|
147e83 |
xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
-
|
|
|
147e83 |
andc rNEG, rNEG, rTMP
|
|
|
147e83 |
blt- L(highbit)
|
|
|
147e83 |
cntlzd rBITDIF, rBITDIF
|
|
|
147e83 |
@@ -98,7 +146,7 @@
|
|
|
147e83 |
cmpd cr1, rNEG, rBITDIF
|
|
|
147e83 |
sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
blt- cr1, L(equal)
|
|
|
147e83 |
- sradi rRTN, rRTN, 63
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
147e83 |
ori rRTN, rRTN, 1
|
|
|
147e83 |
blr
|
|
|
147e83 |
L(equal):
|
|
|
147e83 |
@@ -106,7 +154,7 @@
|
|
|
147e83 |
blr
|
|
|
147e83 |
|
|
|
147e83 |
L(different):
|
|
|
147e83 |
- ldu rWORD1, -8(rSTR1)
|
|
|
147e83 |
+ ld rWORD1, -8(rSTR1)
|
|
|
147e83 |
xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
blt- L(highbit)
|
|
|
147e83 |
@@ -114,11 +162,10 @@
|
|
|
147e83 |
ori rRTN, rRTN, 1
|
|
|
147e83 |
blr
|
|
|
147e83 |
L(highbit):
|
|
|
147e83 |
- srdi rWORD2, rWORD2, 56
|
|
|
147e83 |
- srdi rWORD1, rWORD1, 56
|
|
|
147e83 |
- sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ sradi rRTN, rWORD2, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
blr
|
|
|
147e83 |
-
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
|
|
|
147e83 |
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
147e83 |
.align 4
|
|
|
147e83 |
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S
|
|
|
147e83 |
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
147e83 |
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/power7/strncmp.S 2014-05-28 13:27:02.000000000 -0500
|
|
|
147e83 |
@@ -29,7 +29,7 @@
|
|
|
147e83 |
EALIGN (BP_SYM(strncmp),5,0)
|
|
|
147e83 |
CALL_MCOUNT 3
|
|
|
147e83 |
|
|
|
147e83 |
-#define rTMP r0
|
|
|
147e83 |
+#define rTMP2 r0
|
|
|
147e83 |
#define rRTN r3
|
|
|
147e83 |
#define rSTR1 r3 /* first string arg */
|
|
|
147e83 |
#define rSTR2 r4 /* second string arg */
|
|
|
147e83 |
@@ -45,6 +45,7 @@
|
|
|
147e83 |
#define r7F7F r9 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
147e83 |
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
147e83 |
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
147e83 |
+#define rTMP r12
|
|
|
147e83 |
|
|
|
147e83 |
dcbt 0,rSTR1
|
|
|
147e83 |
nop
|
|
|
147e83 |
@@ -88,12 +89,57 @@
|
|
|
147e83 |
we don't compare two strings as different because of gunk beyond
|
|
|
147e83 |
the end of the strings... */
|
|
|
147e83 |
|
|
|
147e83 |
+#ifdef __LITTLE_ENDIAN__
|
|
|
147e83 |
+L(endstring):
|
|
|
147e83 |
+ addi rTMP2, rTMP, -1
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ andc rTMP2, rTMP2, rTMP
|
|
|
147e83 |
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
147e83 |
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
147e83 |
+ and rWORD1, rWORD1, rTMP2
|
|
|
147e83 |
+ cmpd cr1, rWORD1, rWORD2
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ cmpb rBITDIF, rWORD1, rWORD2 /* 0xff on equal bytes. */
|
|
|
147e83 |
+ addi rNEG, rBITDIF, 1
|
|
|
147e83 |
+ orc rNEG, rNEG, rBITDIF /* 0's below LS differing byte. */
|
|
|
147e83 |
+ sldi rNEG, rNEG, 8 /* 1's above LS differing byte. */
|
|
|
147e83 |
+ andc rWORD1, rWORD1, rNEG /* mask off MS bytes. */
|
|
|
147e83 |
+ andc rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(equal):
|
|
|
147e83 |
+ li rRTN, 0
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+L(different):
|
|
|
147e83 |
+ ld rWORD1, -8(rSTR1)
|
|
|
147e83 |
+ cmpb rBITDIF, rWORD1, rWORD2 /* 0xff on equal bytes. */
|
|
|
147e83 |
+ addi rNEG, rBITDIF, 1
|
|
|
147e83 |
+ orc rNEG, rNEG, rBITDIF /* 0's below LS differing byte. */
|
|
|
147e83 |
+ sldi rNEG, rNEG, 8 /* 1's above LS differing byte. */
|
|
|
147e83 |
+ andc rWORD1, rWORD1, rNEG /* mask off MS bytes. */
|
|
|
147e83 |
+ andc rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(highbit):
|
|
|
147e83 |
+ sradi rRTN, rWORD2, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+#else
|
|
|
147e83 |
L(endstring):
|
|
|
147e83 |
and rTMP,r7F7F,rWORD1
|
|
|
147e83 |
beq cr1,L(equal)
|
|
|
147e83 |
add rTMP,rTMP,r7F7F
|
|
|
147e83 |
xor. rBITDIF,rWORD1,rWORD2
|
|
|
147e83 |
-
|
|
|
147e83 |
andc rNEG,rNEG,rTMP
|
|
|
147e83 |
blt L(highbit)
|
|
|
147e83 |
cntlzd rBITDIF,rBITDIF
|
|
|
147e83 |
@@ -102,7 +148,7 @@
|
|
|
147e83 |
cmpd cr1,rNEG,rBITDIF
|
|
|
147e83 |
sub rRTN,rWORD1,rWORD2
|
|
|
147e83 |
blt cr1,L(equal)
|
|
|
147e83 |
- sradi rRTN,rRTN,63
|
|
|
147e83 |
+ sradi rRTN,rRTN,63 /* must return an int. */
|
|
|
147e83 |
ori rRTN,rRTN,1
|
|
|
147e83 |
blr
|
|
|
147e83 |
L(equal):
|
|
|
147e83 |
@@ -110,7 +156,7 @@
|
|
|
147e83 |
blr
|
|
|
147e83 |
|
|
|
147e83 |
L(different):
|
|
|
147e83 |
- ldu rWORD1,-8(rSTR1)
|
|
|
147e83 |
+ ld rWORD1,-8(rSTR1)
|
|
|
147e83 |
xor. rBITDIF,rWORD1,rWORD2
|
|
|
147e83 |
sub rRTN,rWORD1,rWORD2
|
|
|
147e83 |
blt L(highbit)
|
|
|
147e83 |
@@ -118,11 +164,10 @@
|
|
|
147e83 |
ori rRTN,rRTN,1
|
|
|
147e83 |
blr
|
|
|
147e83 |
L(highbit):
|
|
|
147e83 |
- srdi rWORD2,rWORD2,56
|
|
|
147e83 |
- srdi rWORD1,rWORD1,56
|
|
|
147e83 |
- sub rRTN,rWORD1,rWORD2
|
|
|
147e83 |
+ sradi rRTN,rWORD2,63
|
|
|
147e83 |
+ ori rRTN,rRTN,1
|
|
|
147e83 |
blr
|
|
|
147e83 |
-
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
|
|
|
147e83 |
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
147e83 |
.align 4
|
|
|
147e83 |
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S
|
|
|
147e83 |
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
147e83 |
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcmp.S 2014-05-28 13:37:15.000000000 -0500
|
|
|
147e83 |
@@ -27,7 +27,7 @@
|
|
|
147e83 |
EALIGN (BP_SYM(strcmp), 4, 0)
|
|
|
147e83 |
CALL_MCOUNT 2
|
|
|
147e83 |
|
|
|
147e83 |
-#define rTMP r0
|
|
|
147e83 |
+#define rTMP2 r0
|
|
|
147e83 |
#define rRTN r3
|
|
|
147e83 |
#define rSTR1 r3 /* first string arg */
|
|
|
147e83 |
#define rSTR2 r4 /* second string arg */
|
|
|
147e83 |
@@ -46,6 +46,7 @@
|
|
|
147e83 |
#define r7F7F r8 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
147e83 |
#define rNEG r9 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
147e83 |
#define rBITDIF r10 /* bits that differ in s1 & s2 words */
|
|
|
147e83 |
+#define rTMP r11
|
|
|
147e83 |
|
|
|
147e83 |
CHECK_BOUNDS_LOW (rSTR1, rTMP, rHIGH1)
|
|
|
147e83 |
CHECK_BOUNDS_LOW (rSTR2, rTMP, rHIGH2)
|
|
|
147e83 |
@@ -72,19 +73,66 @@
|
|
|
147e83 |
ldu rWORD2, 8(rSTR2)
|
|
|
147e83 |
L(g1): add rTMP, rFEFE, rWORD1
|
|
|
147e83 |
nor rNEG, r7F7F, rWORD1
|
|
|
147e83 |
-
|
|
|
147e83 |
and. rTMP, rTMP, rNEG
|
|
|
147e83 |
cmpd cr1, rWORD1, rWORD2
|
|
|
147e83 |
beq+ L(g0)
|
|
|
147e83 |
-L(endstring):
|
|
|
147e83 |
+
|
|
|
147e83 |
/* OK. We've hit the end of the string. We need to be careful that
|
|
|
147e83 |
we don't compare two strings as different because of gunk beyond
|
|
|
147e83 |
the end of the strings... */
|
|
|
147e83 |
+#ifdef __LITTLE_ENDIAN__
|
|
|
147e83 |
+L(endstring):
|
|
|
147e83 |
+ addi rTMP2, rTMP, -1
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ andc rTMP2, rTMP2, rTMP
|
|
|
147e83 |
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
147e83 |
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
147e83 |
+ and rWORD1, rWORD1, rTMP2
|
|
|
147e83 |
+ cmpd cr1, rWORD1, rWORD2
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
147e83 |
+ neg rNEG, rBITDIF
|
|
|
147e83 |
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
147e83 |
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
147e83 |
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
147e83 |
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
147e83 |
+ sld rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt- L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(equal):
|
|
|
147e83 |
+ li rRTN, 0
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+L(different):
|
|
|
147e83 |
+ ld rWORD1, -8(rSTR1)
|
|
|
147e83 |
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
147e83 |
+ neg rNEG, rBITDIF
|
|
|
147e83 |
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
147e83 |
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
147e83 |
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
147e83 |
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
147e83 |
+ sld rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt- L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(highbit):
|
|
|
147e83 |
+ sradi rRTN, rWORD2, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+#else
|
|
|
147e83 |
+L(endstring):
|
|
|
147e83 |
and rTMP, r7F7F, rWORD1
|
|
|
147e83 |
beq cr1, L(equal)
|
|
|
147e83 |
add rTMP, rTMP, r7F7F
|
|
|
147e83 |
xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
-
|
|
|
147e83 |
andc rNEG, rNEG, rTMP
|
|
|
147e83 |
blt- L(highbit)
|
|
|
147e83 |
cntlzd rBITDIF, rBITDIF
|
|
|
147e83 |
@@ -93,7 +141,7 @@
|
|
|
147e83 |
cmpd cr1, rNEG, rBITDIF
|
|
|
147e83 |
sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
blt- cr1, L(equal)
|
|
|
147e83 |
- sradi rRTN, rRTN, 63
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
147e83 |
ori rRTN, rRTN, 1
|
|
|
147e83 |
blr
|
|
|
147e83 |
L(equal):
|
|
|
147e83 |
@@ -110,12 +158,11 @@
|
|
|
147e83 |
ori rRTN, rRTN, 1
|
|
|
147e83 |
blr
|
|
|
147e83 |
L(highbit):
|
|
|
147e83 |
- srdi rWORD2, rWORD2, 56
|
|
|
147e83 |
- srdi rWORD1, rWORD1, 56
|
|
|
147e83 |
- sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ sradi rRTN, rWORD2, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
/* GKM FIXME: check high bounds. */
|
|
|
147e83 |
blr
|
|
|
147e83 |
-
|
|
|
147e83 |
+#endif
|
|
|
147e83 |
|
|
|
147e83 |
/* Oh well. In this case, we just do a byte-by-byte comparison. */
|
|
|
147e83 |
.align 4
|
|
|
147e83 |
diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S
|
|
|
147e83 |
--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S 2014-05-28 13:26:59.000000000 -0500
|
|
|
147e83 |
+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strncmp.S 2014-05-28 13:38:31.000000000 -0500
|
|
|
147e83 |
@@ -27,7 +27,7 @@
|
|
|
147e83 |
EALIGN (BP_SYM(strncmp), 4, 0)
|
|
|
147e83 |
CALL_MCOUNT 3
|
|
|
147e83 |
|
|
|
147e83 |
-#define rTMP r0
|
|
|
147e83 |
+#define rTMP2 r0
|
|
|
147e83 |
#define rRTN r3
|
|
|
147e83 |
#define rSTR1 r3 /* first string arg */
|
|
|
147e83 |
#define rSTR2 r4 /* second string arg */
|
|
|
147e83 |
@@ -41,6 +41,7 @@
|
|
|
147e83 |
#define r7F7F r9 /* constant 0x7f7f7f7f7f7f7f7f */
|
|
|
147e83 |
#define rNEG r10 /* ~(word in s1 | 0x7f7f7f7f7f7f7f7f) */
|
|
|
147e83 |
#define rBITDIF r11 /* bits that differ in s1 & s2 words */
|
|
|
147e83 |
+#define rTMP r12
|
|
|
147e83 |
|
|
|
147e83 |
dcbt 0,rSTR1
|
|
|
147e83 |
or rTMP, rSTR2, rSTR1
|
|
|
147e83 |
@@ -81,13 +82,60 @@
|
|
|
147e83 |
/* OK. We've hit the end of the string. We need to be careful that
|
|
|
147e83 |
we don't compare two strings as different because of gunk beyond
|
|
|
147e83 |
the end of the strings... */
|
|
|
147e83 |
-
|
|
|
147e83 |
+
|
|
|
147e83 |
+#ifdef __LITTLE_ENDIAN__
|
|
|
147e83 |
+L(endstring):
|
|
|
147e83 |
+ addi rTMP2, rTMP, -1
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ andc rTMP2, rTMP2, rTMP
|
|
|
147e83 |
+ rldimi rTMP2, rTMP2, 1, 0
|
|
|
147e83 |
+ and rWORD2, rWORD2, rTMP2 /* Mask off gunk. */
|
|
|
147e83 |
+ and rWORD1, rWORD1, rTMP2
|
|
|
147e83 |
+ cmpd cr1, rWORD1, rWORD2
|
|
|
147e83 |
+ beq cr1, L(equal)
|
|
|
147e83 |
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
147e83 |
+ neg rNEG, rBITDIF
|
|
|
147e83 |
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
147e83 |
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
147e83 |
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
147e83 |
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
147e83 |
+ sld rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt- L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(equal):
|
|
|
147e83 |
+ li rRTN, 0
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+L(different):
|
|
|
147e83 |
+ ld rWORD1, -8(rSTR1)
|
|
|
147e83 |
+ xor rBITDIF, rWORD1, rWORD2 /* rBITDIF has bits that differ. */
|
|
|
147e83 |
+ neg rNEG, rBITDIF
|
|
|
147e83 |
+ and rNEG, rNEG, rBITDIF /* rNEG has LS bit that differs. */
|
|
|
147e83 |
+ cntlzd rNEG, rNEG /* bitcount of the bit. */
|
|
|
147e83 |
+ andi. rNEG, rNEG, 56 /* bitcount to LS byte that differs. */
|
|
|
147e83 |
+ sld rWORD1, rWORD1, rNEG /* shift left to clear MS bytes. */
|
|
|
147e83 |
+ sld rWORD2, rWORD2, rNEG
|
|
|
147e83 |
+ xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
+ sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
+ blt- L(highbit)
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+L(highbit):
|
|
|
147e83 |
+ sradi rRTN, rWORD2, 63
|
|
|
147e83 |
+ ori rRTN, rRTN, 1
|
|
|
147e83 |
+ blr
|
|
|
147e83 |
+
|
|
|
147e83 |
+#else
|
|
|
147e83 |
L(endstring):
|
|
|
147e83 |
and rTMP, r7F7F, rWORD1
|
|
|
147e83 |
beq cr1, L(equal)
|
|
|
147e83 |
add rTMP, rTMP, r7F7F
|
|
|
147e83 |
xor. rBITDIF, rWORD1, rWORD2
|
|
|
147e83 |
-
|
|
|
147e83 |
andc rNEG, rNEG, rTMP
|
|
|
147e83 |
blt- L(highbit)
|
|
|
147e83 |
cntlzd rBITDIF, rBITDIF
|
|
|
147e83 |
@@ -96,7 +144,7 @@
|
|
|
147e83 |
cmpd cr1, rNEG, rBITDIF
|
|
|
147e83 |
sub rRTN, rWORD1, rWORD2
|
|
|
147e83 |
blt- cr1, L(equal)
|
|
|
147e83 |
- sradi rRTN, rRTN, 63
|
|
|
147e83 |
+ sradi rRTN, rRTN, 63 /* must return an int. */
|
|
|
147e83 |
ori rRTN, rRTN, 1
|
|
|
147e83 |
blr
|
|
|
147e83 |
L(equal):
|
|
|
147e83 |
@@ -104,7 +152,7 @@
|
|
|
147e83 |
blr
|
|
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147e83 |
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147e83 |
L(different):
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147e83 |
- ldu rWORD1, -8(rSTR1)
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147e83 |
+ ld rWORD1, -8(rSTR1)
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147e83 |
xor. rBITDIF, rWORD1, rWORD2
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147e83 |
sub rRTN, rWORD1, rWORD2
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147e83 |
blt- L(highbit)
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147e83 |
@@ -112,11 +160,10 @@
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147e83 |
ori rRTN, rRTN, 1
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147e83 |
blr
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147e83 |
L(highbit):
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147e83 |
- srdi rWORD2, rWORD2, 56
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147e83 |
- srdi rWORD1, rWORD1, 56
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147e83 |
- sub rRTN, rWORD1, rWORD2
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147e83 |
+ sradi rRTN, rWORD2, 63
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147e83 |
+ ori rRTN, rRTN, 1
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147e83 |
blr
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147e83 |
-
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147e83 |
+#endif
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147e83 |
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147e83 |
/* Oh well. In this case, we just do a byte-by-byte comparison. */
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147e83 |
.align 4
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