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[thirdparty/glibc.git] / sysdeps / powerpc / powerpc64 / memcpy.S

diff --git a/sysdeps/powerpc/powerpc64/memcpy.S b/sysdeps/powerpc/powerpc64/memcpy.S
index b8c4cc8b10a16bf516829756f2f8e8cb63345782..3610051fa5432dba0ee74adf631a0d735e00086a 100644 (file)
--- a/sysdeps/powerpc/powerpc64/memcpy.S
+++ b/sysdeps/powerpc/powerpc64/memcpy.S
@@ -1,5 +1,5 @@
 /* Optimized memcpy implementation for PowerPC64.
-   Copyright (C) 2003-2013 Free Software Foundation, Inc.
+   Copyright (C) 2003-2019 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
    The GNU C Library is free software; you can redistribute it and/or
@@ -14,11 +14,11 @@
 
    You should have received a copy of the GNU Lesser General Public
    License along with the GNU C Library; if not, see
-   <http://www.gnu.org/licenses/>.  */
+   <https://www.gnu.org/licenses/>.  */
 
 #include <sysdep.h>
 
-/* __ptr_t [r3] memcpy (__ptr_t dst [r3], __ptr_t src [r4], size_t len [r5]);
+/* void * [r3] memcpy (void *dst [r3], void *src [r4], size_t len [r5]);
    Returns 'dst'.
 
    Memcpy handles short copies (< 32-bytes) using a binary move blocks
@@ -33,7 +33,11 @@
    possible when both source and destination are doubleword aligned.
    Each case has a optimized unrolled loop.   */
 
-EALIGN (memcpy, 5, 0)
+#ifndef MEMCPY
+# define MEMCPY memcpy
+#endif
+
+ENTRY_TOCLESS (MEMCPY, 5)
        CALL_MCOUNT 3
 
     cmpldi cr1,5,31
@@ -212,15 +216,28 @@ EALIGN (memcpy, 5, 0)
     blt   cr6,5f
     srdi  7,6,16
     bgt          cr6,3f
+#ifdef __LITTLE_ENDIAN__
+    sth   7,0(3)
+#else
     sth   6,0(3)
+#endif
     b     7f
     .align  4
 3:
+#ifdef __LITTLE_ENDIAN__
+    rotlwi 6,6,24
+    stb   6,0(3)
+    sth   7,1(3)
+#else
     stb   7,0(3)
     sth   6,1(3)
+#endif
     b     7f
     .align  4
 5:
+#ifdef __LITTLE_ENDIAN__
+    rotlwi 6,6,8
+#endif
     stb   6,0(3)
 7:
     cmpldi     cr1,10,16
@@ -328,7 +345,11 @@ EALIGN (memcpy, 5, 0)
     ld    7,8(5)
     subfic  9,10,64
     beq   2f
+#ifdef __LITTLE_ENDIAN__
+    srd   0,6,10
+#else
     sld   0,6,10
+#endif
     cmpldi  11,1
     mr    6,7
     addi  4,4,-8
@@ -336,15 +357,25 @@ EALIGN (memcpy, 5, 0)
     b     1f
 2:  addi  5,5,8
     .align  4
+#ifdef __LITTLE_ENDIAN__
+0:  srd   0,6,10
+    sld   8,7,9
+#else
 0:  sld   0,6,10
     srd   8,7,9
+#endif
     cmpldi  11,2
     ld    6,8(5)
     or    0,0,8
     addi  11,11,-2
     std   0,0(4)
+#ifdef __LITTLE_ENDIAN__
+    srd   0,7,10
+1:  sld   8,6,9
+#else
     sld   0,7,10
 1:  srd   8,6,9
+#endif
     or    0,0,8
     beq   8f
     ld    7,16(5)
@@ -362,5 +393,5 @@ EALIGN (memcpy, 5, 0)
     ld 31,-8(1)
     ld 3,-16(1)
     blr
-END_GEN_TB (memcpy,TB_TOCLESS)
+END_GEN_TB (MEMCPY,TB_TOCLESS)
 libc_hidden_builtin_def (memcpy)