The BLK_SHA1 code has optimized wrappers for doing endian
conversions on memory that may not be aligned. Let's pull
them out so that we can use them elsewhere, especially the
time-tested list of platforms that prefer each strategy.
Signed-off-by: Jeff King <p...@peff.net>
---
These short names might not be descriptive enough now that they are
globals. However, they make sense to me. I'm open to suggestions if
somebody disagrees.
block-sha1/sha1.c | 32 --------------------------------
compat/bswap.h | 32 ++++++++++++++++++++++++++++++++
2 files changed, 32 insertions(+), 32 deletions(-)
diff --git a/block-sha1/sha1.c b/block-sha1/sha1.c
index e1a1eb6..22b125c 100644
--- a/block-sha1/sha1.c
+++ b/block-sha1/sha1.c
@@ -62,38 +62,6 @@
#define setW(x, val) (W(x) = (val))
#endif
-/*
- * Performance might be improved if the CPU architecture is OK with
- * unaligned 32-bit loads and a fast ntohl() is available.
- * Otherwise fall back to byte loads and shifts which is portable,
- * and is faster on architectures with memory alignment issues.
- */
-
-#if defined(__i386__) || defined(__x86_64__) || \
- defined(_M_IX86) || defined(_M_X64) || \
- defined(__ppc__) || defined(__ppc64__) || \
- defined(__powerpc__) || defined(__powerpc64__) || \
- defined(__s390__) || defined(__s390x__)
-
-#define get_be32(p) ntohl(*(unsigned int *)(p))
-#define put_be32(p, v) do { *(unsigned int *)(p) = htonl(v); } while (0)
-
-#else
-
-#define get_be32(p) ( \
- (*((unsigned char *)(p) + 0) << 24) | \
- (*((unsigned char *)(p) + 1) << 16) | \
- (*((unsigned char *)(p) + 2) << 8) | \
- (*((unsigned char *)(p) + 3) << 0) )
-#define put_be32(p, v) do { \
- unsigned int __v = (v); \
- *((unsigned char *)(p) + 0) = __v >> 24; \
- *((unsigned char *)(p) + 1) = __v >> 16; \
- *((unsigned char *)(p) + 2) = __v >> 8; \
- *((unsigned char *)(p) + 3) = __v >> 0; } while (0)
-
-#endif
-
/* This "rolls" over the 512-bit array */
#define W(x) (array[(x)&15])
diff --git a/compat/bswap.h b/compat/bswap.h
index c18a78e..7d17953 100644
--- a/compat/bswap.h
+++ b/compat/bswap.h
@@ -122,3 +122,35 @@ static inline uint64_t git_bswap64(uint64_t x)
#endif
#endif
+
+/*
+ * Performance might be improved if the CPU architecture is OK with
+ * unaligned 32-bit loads and a fast ntohl() is available.
+ * Otherwise fall back to byte loads and shifts which is portable,
+ * and is faster on architectures with memory alignment issues.
+ */
+
+#if defined(__i386__) || defined(__x86_64__) || \
+ defined(_M_IX86) || defined(_M_X64) || \
+ defined(__ppc__) || defined(__ppc64__) || \
+ defined(__powerpc__) || defined(__powerpc64__) || \
+ defined(__s390__) || defined(__s390x__)
+
+#define get_be32(p) ntohl(*(unsigned int *)(p))
+#define put_be32(p, v) do { *(unsigned int *)(p) = htonl(v); } while (0)
+
+#else
+
+#define get_be32(p) ( \
+ (*((unsigned char *)(p) + 0) << 24) | \
+ (*((unsigned char *)(p) + 1) << 16) | \
+ (*((unsigned char *)(p) + 2) << 8) | \
+ (*((unsigned char *)(p) + 3) << 0) )
+#define put_be32(p, v) do { \
+ unsigned int __v = (v); \
+ *((unsigned char *)(p) + 0) = __v >> 24; \
+ *((unsigned char *)(p) + 1) = __v >> 16; \
+ *((unsigned char *)(p) + 2) = __v >> 8; \
+ *((unsigned char *)(p) + 3) = __v >> 0; } while (0)
+
+#endif
--
1.8.5.2.500.g8060133
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