microblaze: Support C optimized lib functions for little-endian

Optimized C library functions can rapidly speedup the kernel.
memset doesn't need to be optimized because there is no difference
in behavior on little/big endian cpu.

Signed-off-by: Michal Simek <monstr@monstr.eu>

2 files changed, 60 insertions, 6 deletions

diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c
index ab2d115f9ee..cc495d7d99c 100644
--- a/arch/microblaze/lib/memcpy.c
+++ b/arch/microblaze/lib/memcpy.c
@@ -93,7 +93,7 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
                 case 0x1:       /* Unaligned - Off by 1 */
                         /* Word align the source */
                         i_src = (const void *) ((unsigned)src & ~3);
-
+#ifndef __MICROBLAZEEL__
                         /* Load the holding buffer */
                         buf_hold = *i_src++ << 8;
 
@@ -102,7 +102,16 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
                                 *i_dst++ = buf_hold | value >> 24;
                                 buf_hold = value << 8;
                         }
+#else
+                        /* Load the holding buffer */
+                        buf_hold = (*i_src++ & 0xFFFFFF00) >>8;
 
+                        for (; c >= 4; c -= 4) {
+                                value = *i_src++;
+                                *i_dst++ = buf_hold | ((value & 0xFF) << 24);
+                                buf_hold = (value & 0xFFFFFF00) >>8;
+                        }
+#endif
                         /* Realign the source */
                         src = (const void *)i_src;
                         src -= 3;
@@ -110,7 +119,7 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
                 case 0x2:       /* Unaligned - Off by 2 */
                         /* Word align the source */
                         i_src = (const void *) ((unsigned)src & ~3);
-
+#ifndef __MICROBLAZEEL__
                         /* Load the holding buffer */
                         buf_hold = *i_src++ << 16;
 
@@ -119,7 +128,16 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
                                 *i_dst++ = buf_hold | value >> 16;
                                 buf_hold = value << 16;
                         }
+#else
+                        /* Load the holding buffer */
+                        buf_hold = (*i_src++ & 0xFFFF0000 )>>16;
 
+                        for (; c >= 4; c -= 4) {
+                                value = *i_src++;
+                                *i_dst++ = buf_hold | ((value & 0xFFFF)<<16);
+                                buf_hold = (value & 0xFFFF0000) >>16;
+                        }
+#endif
                         /* Realign the source */
                         src = (const void *)i_src;
                         src -= 2;
@@ -127,7 +145,7 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
                 case 0x3:       /* Unaligned - Off by 3 */
                         /* Word align the source */
                         i_src = (const void *) ((unsigned)src & ~3);
-
+#ifndef __MICROBLAZEEL__
                         /* Load the holding buffer */
                         buf_hold = *i_src++ << 24;
 
@@ -136,7 +154,16 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c)
                                 *i_dst++ = buf_hold | value >> 8;
                                 buf_hold = value << 24;
                         }
+#else
+                        /* Load the holding buffer */
+                        buf_hold = (*i_src++ & 0xFF000000) >> 24;
 
+                        for (; c >= 4; c -= 4) {
+                                value = *i_src++;
+                                *i_dst++ = buf_hold | ((value & 0xFFFFFF) << 8);
+                                buf_hold = (value & 0xFF000000) >> 24;
+                        }
+#endif
                         /* Realign the source */
                         src = (const void *)i_src;
                         src -= 1;
diff --git a/arch/microblaze/lib/memmove.c b/arch/microblaze/lib/memmove.c
index 1d3c0e7990e..123e3616f2d 100644
--- a/arch/microblaze/lib/memmove.c
+++ b/arch/microblaze/lib/memmove.c
@@ -114,7 +114,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
                 case 0x1:       /* Unaligned - Off by 1 */
                         /* Word align the source */
                         i_src = (const void *) (((unsigned)src + 4) & ~3);
-
+#ifndef __MICROBLAZEEL__
                         /* Load the holding buffer */
                         buf_hold = *--i_src >> 24;
 
@@ -123,7 +123,16 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
                                 *--i_dst = buf_hold << 8 | value;
                                 buf_hold = value >> 24;
                         }
+#else
+                        /* Load the holding buffer */
+                        buf_hold = (*--i_src & 0xFF) << 24;
 
+                        for (; c >= 4; c -= 4) {
+                                value = *--i_src;
+                                *--i_dst = buf_hold | ((value & 0xFFFFFF00)>>8);
+                                buf_hold = (value  & 0xFF) << 24;
+                        }
+#endif
                         /* Realign the source */
                         src = (const void *)i_src;
                         src += 1;
@@ -131,7 +140,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
                 case 0x2:       /* Unaligned - Off by 2 */
                         /* Word align the source */
                         i_src = (const void *) (((unsigned)src + 4) & ~3);
-
+#ifndef __MICROBLAZEEL__
                         /* Load the holding buffer */
                         buf_hold = *--i_src >> 16;
 
@@ -140,7 +149,16 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
                                 *--i_dst = buf_hold << 16 | value;
                                 buf_hold = value >> 16;
                         }
+#else
+                        /* Load the holding buffer */
+                        buf_hold = (*--i_src & 0xFFFF) << 16;
 
+                        for (; c >= 4; c -= 4) {
+                                value = *--i_src;
+                                *--i_dst = buf_hold | ((value & 0xFFFF0000)>>16);
+                                buf_hold = (value & 0xFFFF) << 16;
+                        }
+#endif
                         /* Realign the source */
                         src = (const void *)i_src;
                         src += 2;
@@ -148,7 +166,7 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
                 case 0x3:       /* Unaligned - Off by 3 */
                         /* Word align the source */
                         i_src = (const void *) (((unsigned)src + 4) & ~3);
-
+#ifndef __MICROBLAZEEL__
                         /* Load the holding buffer */
                         buf_hold = *--i_src >> 8;
 
@@ -157,7 +175,16 @@ void *memmove(void *v_dst, const void *v_src, __kernel_size_t c)
                                 *--i_dst = buf_hold << 24 | value;
                                 buf_hold = value >> 8;
                         }
+#else
+                        /* Load the holding buffer */
+                        buf_hold = (*--i_src & 0xFFFFFF) << 8;
 
+                        for (; c >= 4; c -= 4) {
+                                value = *--i_src;
+                                *--i_dst = buf_hold | ((value & 0xFF000000)>> 24);
+                                buf_hold = (value & 0xFFFFFF) << 8;;
+                        }
+#endif
                         /* Realign the source */
                         src = (const void *)i_src;
                         src += 3;