Replace the UNROLL_LESS define with UNROLL_MORE, making UNROLL_LESS the default.

Performance benchmarks have so far not shown that any platform benefits from UNROLL_MORE,
although this might be beneficial on older compilers/cpus or for compiling without optimizations.

The extra UNROLL_MORE code should be considered for removal since it is never enabled by us
and will likely only serve to confuse and contribute to bitrot.

1 files changed, 8 insertions, 8 deletions

diff --git a/crc32.c b/crc32.c
index 95080b3..33e82d3 100644
--- a/crc32.c
+++ b/crc32.c
@@ -255,16 +255,16 @@ ZLIB_INTERNAL uint32_t crc32_generic(uint32_t crc, const unsigned char *buf, uin
 {
     crc = crc ^ 0xffffffff;
 
-#ifdef UNROLL_LESS
-    while (len >= 4) {
-        DO4;
-        len -= 4;
-    }
-#else
+#ifdef UNROLL_MORE
     while (len >= 8) {
         DO8;
         len -= 8;
     }
+#else
+    while (len >= 4) {
+        DO4;
+        len -= 4;
+    }
 #endif
 
     if (len) do {
@@ -310,7 +310,7 @@ ZLIB_INTERNAL uint32_t crc32_little(uint32_t crc, const unsigned char *buf, uint
 
     buf4 = (const uint32_t *)(const void *)buf;
 
-#ifndef UNROLL_LESS
+#ifdef UNROLL_MORE
     while (len >= 32) {
         DOLIT32;
         len -= 32;
@@ -352,7 +352,7 @@ ZLIB_INTERNAL uint32_t crc32_big(uint32_t crc, const unsigned char *buf, uint64_
 
     buf4 = (const uint32_t *)(const void *)buf;
 
-#ifndef UNROLL_LESS
+#ifdef UNROLL_MORE
     while (len >= 32) {
         DOBIG32;
         len -= 32;