Affected the lscr fate-test (only visible on x86 if
the SSE2 is disabled).
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com>
---
libavcodec/pngdsp.c | 25 +++++++++++++++++++------
1 file changed, 19 insertions(+), 6 deletions(-)
diff --git a/libavcodec/pngdsp.c b/libavcodec/pngdsp.c
index 65916b1386..50ee96a684 100644
--- a/libavcodec/pngdsp.c
+++ b/libavcodec/pngdsp.c
@@ -21,20 +21,33 @@
#include "config.h"
#include "libavutil/attributes.h"
+#include "libavutil/intreadwrite.h"
+#include "libavutil/macros.h"
#include "png.h"
#include "pngdsp.h"
+#if HAVE_FAST_64BIT
+#define BITS 64
+typedef uint64_t uint_native;
+#else
+#define BITS 32
+typedef uint32_t uint_native;
+#endif
+#define RN AV_JOIN(AV_RN, BITS)
+#define RNA AV_JOIN(AV_JOIN(AV_RN, BITS), A)
+#define WN AV_JOIN(AV_WN, BITS)
+
// 0x7f7f7f7f or 0x7f7f7f7f7f7f7f7f or whatever, depending on the cpu's native
arithmetic size
-#define pb_7f (~0UL / 255 * 0x7f)
-#define pb_80 (~0UL / 255 * 0x80)
+#define pb_7f (~(uint_native)0 / 255 * 0x7f)
+#define pb_80 (~(uint_native)0 / 255 * 0x80)
static void add_bytes_l2_c(uint8_t *dst, uint8_t *src1, uint8_t *src2, int w)
{
long i;
- for (i = 0; i <= w - (int) sizeof(long); i += sizeof(long)) {
- long a = *(long *)(src1 + i);
- long b = *(long *)(src2 + i);
- *(long *)(dst + i) = ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80);
+ for (i = 0; i <= w - (int) sizeof(uint_native); i += sizeof(uint_native)) {
+ uint_native a = RNA(src1 + i);
+ uint_native b = RN (src2 + i);
+ WN(dst + i, ((a & pb_7f) + (b & pb_7f)) ^ ((a ^ b) & pb_80));
}
for (; i < w; i++)
dst[i] = src1[i] + src2[i];
--
2.40.1
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