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168 lines
4.8 KiB
Diff
168 lines
4.8 KiB
Diff
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# commit 43b84013714c46e6dcae4a5564c5527777ad5e08
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# Author: Alan Modra <amodra@gmail.com>
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# Date: Sat Aug 17 18:45:31 2013 +0930
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#
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# PowerPC LE strcpy
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# http://sourceware.org/ml/libc-alpha/2013-08/msg00100.html
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#
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# The strcpy changes for little-endian are quite straight-forward, just
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# a matter of rotating the last word differently.
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#
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# I'll note that the powerpc64 version of stpcpy is just begging to be
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# converted to use 64-bit loads and stores..
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#
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# * sysdeps/powerpc/powerpc64/strcpy.S: Add little-endian support:
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# * sysdeps/powerpc/powerpc32/strcpy.S: Likewise.
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# * sysdeps/powerpc/powerpc64/stpcpy.S: Likewise.
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# * sysdeps/powerpc/powerpc32/stpcpy.S: Likewise.
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#
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/stpcpy.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/stpcpy.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/stpcpy.S 2014-05-28 13:40:01.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/stpcpy.S 2014-05-28 13:40:01.000000000 -0500
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@@ -74,7 +74,22 @@
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mr rALT, rWORD
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/* We've hit the end of the string. Do the rest byte-by-byte. */
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-L(g1): rlwinm. rTMP, rALT, 8, 24, 31
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+L(g1):
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+#ifdef __LITTLE_ENDIAN__
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+ rlwinm. rTMP, rALT, 0, 24, 31
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+ stbu rALT, 4(rDEST)
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+ beqlr-
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+ rlwinm. rTMP, rALT, 24, 24, 31
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+ stbu rTMP, 1(rDEST)
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+ beqlr-
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+ rlwinm. rTMP, rALT, 16, 24, 31
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+ stbu rTMP, 1(rDEST)
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+ beqlr-
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+ rlwinm rTMP, rALT, 8, 24, 31
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+ stbu rTMP, 1(rDEST)
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+ blr
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+#else
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+ rlwinm. rTMP, rALT, 8, 24, 31
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stbu rTMP, 4(rDEST)
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beqlr-
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rlwinm. rTMP, rALT, 16, 24, 31
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@@ -87,6 +102,7 @@
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CHECK_BOUNDS_HIGH (rDEST, rHIGH, twlgt)
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STORE_RETURN_VALUE (rDEST)
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blr
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+#endif
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/* Oh well. In this case, we just do a byte-by-byte copy. */
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.align 4
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcpy.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcpy.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcpy.S 2014-05-28 13:40:01.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc32/strcpy.S 2014-05-28 13:40:01.000000000 -0500
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@@ -78,7 +78,22 @@
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mr rALT, rWORD
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/* We've hit the end of the string. Do the rest byte-by-byte. */
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-L(g1): rlwinm. rTMP, rALT, 8, 24, 31
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+L(g1):
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+#ifdef __LITTLE_ENDIAN__
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+ rlwinm. rTMP, rALT, 0, 24, 31
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+ stb rALT, 4(rDEST)
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+ beqlr-
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+ rlwinm. rTMP, rALT, 24, 24, 31
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+ stb rTMP, 5(rDEST)
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+ beqlr-
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+ rlwinm. rTMP, rALT, 16, 24, 31
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+ stb rTMP, 6(rDEST)
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+ beqlr-
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+ rlwinm rTMP, rALT, 8, 24, 31
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+ stb rTMP, 7(rDEST)
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+ blr
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+#else
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+ rlwinm. rTMP, rALT, 8, 24, 31
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stb rTMP, 4(rDEST)
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beqlr-
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rlwinm. rTMP, rALT, 16, 24, 31
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@@ -90,6 +105,7 @@
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stb rALT, 7(rDEST)
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/* GKM FIXME: check high bound. */
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blr
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+#endif
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/* Oh well. In this case, we just do a byte-by-byte copy. */
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.align 4
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/stpcpy.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/stpcpy.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/stpcpy.S 2014-05-28 13:40:01.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/stpcpy.S 2014-05-28 13:40:01.000000000 -0500
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@@ -75,7 +75,22 @@
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mr rALT, rWORD
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/* We've hit the end of the string. Do the rest byte-by-byte. */
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-L(g1): rlwinm. rTMP, rALT, 8, 24, 31
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+L(g1):
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+#ifdef __LITTLE_ENDIAN__
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+ rlwinm. rTMP, rALT, 0, 24, 31
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+ stbu rALT, 4(rDEST)
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+ beqlr-
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+ rlwinm. rTMP, rALT, 24, 24, 31
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+ stbu rTMP, 1(rDEST)
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+ beqlr-
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+ rlwinm. rTMP, rALT, 16, 24, 31
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+ stbu rTMP, 1(rDEST)
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+ beqlr-
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+ rlwinm rTMP, rALT, 8, 24, 31
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+ stbu rTMP, 1(rDEST)
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+ blr
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+#else
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+ rlwinm. rTMP, rALT, 8, 24, 31
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stbu rTMP, 4(rDEST)
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beqlr-
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rlwinm. rTMP, rALT, 16, 24, 31
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@@ -88,6 +103,7 @@
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CHECK_BOUNDS_HIGH (rDEST, rHIGH, twlgt)
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STORE_RETURN_VALUE (rDEST)
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blr
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+#endif
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/* Oh well. In this case, we just do a byte-by-byte copy. */
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.align 4
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diff -urN glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcpy.S glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcpy.S
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--- glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcpy.S 2014-05-28 13:40:01.000000000 -0500
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+++ glibc-2.17-c758a686/sysdeps/powerpc/powerpc64/strcpy.S 2014-05-28 13:40:01.000000000 -0500
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@@ -90,6 +90,32 @@
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mr rALT, rWORD
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/* We've hit the end of the string. Do the rest byte-by-byte. */
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L(g1):
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+#ifdef __LITTLE_ENDIAN__
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+ extrdi. rTMP, rALT, 8, 56
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+ stb rALT, 8(rDEST)
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+ beqlr-
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+ extrdi. rTMP, rALT, 8, 48
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+ stb rTMP, 9(rDEST)
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+ beqlr-
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+ extrdi. rTMP, rALT, 8, 40
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+ stb rTMP, 10(rDEST)
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+ beqlr-
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+ extrdi. rTMP, rALT, 8, 32
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+ stb rTMP, 11(rDEST)
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+ beqlr-
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+ extrdi. rTMP, rALT, 8, 24
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+ stb rTMP, 12(rDEST)
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+ beqlr-
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+ extrdi. rTMP, rALT, 8, 16
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+ stb rTMP, 13(rDEST)
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+ beqlr-
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+ extrdi. rTMP, rALT, 8, 8
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+ stb rTMP, 14(rDEST)
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+ beqlr-
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+ extrdi rTMP, rALT, 8, 0
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+ stb rTMP, 15(rDEST)
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+ blr
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+#else
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extrdi. rTMP, rALT, 8, 0
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stb rTMP, 8(rDEST)
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beqlr-
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@@ -114,6 +140,7 @@
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stb rALT, 15(rDEST)
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/* GKM FIXME: check high bound. */
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blr
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+#endif
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/* Oh well. In this case, we just do a byte-by-byte copy. */
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.align 4
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