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-rw-r--r--libc/string/powerpc/string.c72
1 files changed, 42 insertions, 30 deletions
diff --git a/libc/string/powerpc/string.c b/libc/string/powerpc/string.c
index 1835e6aa7..acd5d0144 100644
--- a/libc/string/powerpc/string.c
+++ b/libc/string/powerpc/string.c
@@ -32,15 +32,16 @@
#include <locale.h> /* for __LOCALE_C_ONLY */
#ifdef L_memcpy
-void *memcpy(void *to, const void *from, size_t n)
+void attribute_hidden *__memcpy(void *to, const void *from, size_t n)
/* PPC can do pre increment and load/store, but not post increment and load/store.
Therefore use *++ptr instead of *ptr++. */
{
unsigned long rem, chunks, tmp1, tmp2;
- void *tmp_to;
+ unsigned char *tmp_to;
+ unsigned char *tmp_from = (unsigned char *)from;
chunks = n / 8;
- from -= 4;
+ tmp_from -= 4;
tmp_to = to - 4;
if (!chunks)
goto lessthan8;
@@ -50,9 +51,9 @@ void *memcpy(void *to, const void *from, size_t n)
copy_chunks:
do {
/* make gcc to load all data, then store it */
- tmp1 = *(unsigned long *)(from+4);
- from += 8;
- tmp2 = *(unsigned long *)from;
+ tmp1 = *(unsigned long *)(tmp_from+4);
+ tmp_from += 8;
+ tmp2 = *(unsigned long *)tmp_from;
*(unsigned long *)(tmp_to+4) = tmp1;
tmp_to += 8;
*(unsigned long *)tmp_to = tmp2;
@@ -60,23 +61,25 @@ void *memcpy(void *to, const void *from, size_t n)
lessthan8:
n = n % 8;
if (n >= 4) {
- *++(unsigned long *)tmp_to = *++(unsigned long *)from;
+ *(unsigned long *)(tmp_to+4) = *(unsigned long *)(tmp_from+4);
+ tmp_from += 4;
+ tmp_to += 4;
n = n-4;
}
if (!n ) return to;
- from += 3;
+ tmp_from += 3;
tmp_to += 3;
do {
- *++(unsigned char *)tmp_to = *++(unsigned char *)from;
+ *++tmp_to = *++tmp_from;
} while (--n);
return to;
align:
rem = 4 - rem;
- n = n-rem;
+ n = n - rem;
do {
- *(unsigned char *)(tmp_to+4) = *(unsigned char *)(from+4);
- ++from;
+ *(tmp_to+4) = *(tmp_from+4);
+ ++tmp_from;
++tmp_to;
} while (--rem);
chunks = n / 8;
@@ -84,18 +87,20 @@ void *memcpy(void *to, const void *from, size_t n)
goto copy_chunks;
goto lessthan8;
}
+strong_alias(__memcpy, memcpy);
#endif
#ifdef L_memmove
-void *memmove(void *to, const void *from, size_t n)
+void attribute_hidden *__memmove(void *to, const void *from, size_t n)
{
unsigned long rem, chunks, tmp1, tmp2;
- void *tmp_to;
+ unsigned char *tmp_to;
+ unsigned char *tmp_from = (unsigned char *)from;
- if (from >= to)
+ if (tmp_from >= (unsigned char *)to)
return memcpy(to, from, n);
chunks = n / 8;
- from += n;
+ tmp_from += n;
tmp_to = to + n;
if (!chunks)
goto lessthan8;
@@ -105,9 +110,9 @@ void *memmove(void *to, const void *from, size_t n)
copy_chunks:
do {
/* make gcc to load all data, then store it */
- tmp1 = *(unsigned long *)(from-4);
- from -= 8;
- tmp2 = *(unsigned long *)from;
+ tmp1 = *(unsigned long *)(tmp_from-4);
+ tmp_from -= 8;
+ tmp2 = *(unsigned long *)tmp_from;
*(unsigned long *)(tmp_to-4) = tmp1;
tmp_to -= 8;
*(unsigned long *)tmp_to = tmp2;
@@ -115,26 +120,29 @@ void *memmove(void *to, const void *from, size_t n)
lessthan8:
n = n % 8;
if (n >= 4) {
- *--(unsigned long *)tmp_to = *--(unsigned long *)from;
+ *(unsigned long *)(tmp_to-4) = *(unsigned long *)(tmp_from-4);
+ tmp_from -= 4;
+ tmp_to -= 4;
n = n-4;
}
if (!n ) return to;
do {
- *--(unsigned char *)tmp_to = *--(unsigned char *)from;
+ *--tmp_to = *--tmp_from;
} while (--n);
return to;
align:
rem = 4 - rem;
- n = n-rem;
+ n = n - rem;
do {
- *--(unsigned char *)tmp_to = *--(unsigned char *)from;
+ *--tmp_to = *--tmp_from;
} while (--rem);
chunks = n / 8;
if (chunks)
goto copy_chunks;
goto lessthan8;
}
+strong_alias(__memmove, memmove);
#endif
#ifdef L_memset
@@ -148,10 +156,10 @@ static inline int expand_byte_word(int c){
: "=r" (c) : "0" (c));
return c;
}
-void *memset(void *to, int c, size_t n)
+void attribute_hidden *__memset(void *to, int c, size_t n)
{
unsigned long rem, chunks;
- void *tmp_to;
+ unsigned char *tmp_to;
chunks = n / 8;
tmp_to = to - 4;
@@ -163,19 +171,22 @@ void *memset(void *to, int c, size_t n)
goto align;
copy_chunks:
do {
- *++(unsigned long *)tmp_to = c;
- *++(unsigned long *)tmp_to = c;
+ *(unsigned long *)(tmp_to+4) = c;
+ tmp_to += 4;
+ *(unsigned long *)(tmp_to+4) = c;
+ tmp_to += 4;
} while (--chunks);
lessthan8:
n = n % 8;
if (n >= 4) {
- *++(unsigned long *)tmp_to = c;
+ *(unsigned long *)(tmp_to+4) = c;
+ tmp_to += 4;
n = n-4;
}
if (!n ) return to;
tmp_to += 3;
do {
- *++(unsigned char *)tmp_to = c;
+ *++tmp_to = c;
} while (--n);
return to;
@@ -183,7 +194,7 @@ void *memset(void *to, int c, size_t n)
rem = 4 - rem;
n = n-rem;
do {
- *(unsigned char *)(tmp_to+4) = c;
+ *(tmp_to+4) = c;
++tmp_to;
} while (--rem);
chunks = n / 8;
@@ -191,6 +202,7 @@ void *memset(void *to, int c, size_t n)
goto copy_chunks;
goto lessthan8;
}
+strong_alias(__memset, memset);
#endif
#ifdef L_bzero