arm: Add an option for making sure NEON registers aren't clobbered

This is pretty much based on the same test for XMM registers.

Signed-off-by: Martin Storsjö <martin@martin.st>

2 files changed, 80 insertions, 0 deletions

diff --git a/libavcodec/arm/Makefile b/libavcodec/arm/Makefile
index 277abd98ea..8bdccbdee1 100644
--- a/libavcodec/arm/Makefile
+++ b/libavcodec/arm/Makefile
@@ -23,6 +23,7 @@ OBJS-$(CONFIG_HPELDSP)                 += arm/hpeldsp_init_arm.o        \
                                           arm/hpeldsp_arm.o
 OBJS-$(CONFIG_MPEGAUDIODSP)            += arm/mpegaudiodsp_init_arm.o
 OBJS-$(CONFIG_MPEGVIDEO)               += arm/mpegvideo_arm.o
+OBJS-$(CONFIG_NEON_CLOBBER_TEST)       += arm/neontest.o
 OBJS-$(CONFIG_VC1_DECODER)             += arm/vc1dsp_init_arm.o
 OBJS-$(CONFIG_VORBIS_DECODER)          += arm/vorbisdsp_init_arm.o
 OBJS-$(CONFIG_VP3DSP)                  += arm/vp3dsp_init_arm.o
diff --git a/libavcodec/arm/neontest.c b/libavcodec/arm/neontest.c
new file mode 100644
index 0000000000..b77bcd7223
--- /dev/null
+++ b/libavcodec/arm/neontest.c
@@ -0,0 +1,79 @@
+/*
+ * check NEON registers for clobbers
+ * Copyright (c) 2013 Martin Storsjo
+ *
+ * This file is part of Libav.
+ *
+ * Libav is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * Libav is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavcodec/avcodec.h"
+#include "libavutil/arm/neontest.h"
+
+wrap(avcodec_open2(AVCodecContext *avctx,
+                   AVCodec *codec,
+                   AVDictionary **options))
+{
+    testneonclobbers(avcodec_open2, avctx, codec, options);
+}
+
+wrap(avcodec_decode_audio4(AVCodecContext *avctx,
+                           AVFrame *frame,
+                           int *got_frame_ptr,
+                           AVPacket *avpkt))
+{
+    testneonclobbers(avcodec_decode_audio4, avctx, frame,
+                     got_frame_ptr, avpkt);
+}
+
+wrap(avcodec_decode_video2(AVCodecContext *avctx,
+                           AVFrame *picture,
+                           int *got_picture_ptr,
+                           AVPacket *avpkt))
+{
+    testneonclobbers(avcodec_decode_video2, avctx, picture,
+                     got_picture_ptr, avpkt);
+}
+
+wrap(avcodec_decode_subtitle2(AVCodecContext *avctx,
+                              AVSubtitle *sub,
+                              int *got_sub_ptr,
+                              AVPacket *avpkt))
+{
+    testneonclobbers(avcodec_decode_subtitle2, avctx, sub,
+                     got_sub_ptr, avpkt);
+}
+
+wrap(avcodec_encode_audio2(AVCodecContext *avctx,
+                           AVPacket *avpkt,
+                           const AVFrame *frame,
+                           int *got_packet_ptr))
+{
+    testneonclobbers(avcodec_encode_audio2, avctx, avpkt, frame,
+                     got_packet_ptr);
+}
+
+wrap(avcodec_encode_subtitle(AVCodecContext *avctx,
+                             uint8_t *buf, int buf_size,
+                             const AVSubtitle *sub))
+{
+    testneonclobbers(avcodec_encode_subtitle, avctx, buf, buf_size, sub);
+}
+
+wrap(avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt,
+                           const AVFrame *frame, int *got_packet_ptr))
+{
+    testneonclobbers(avcodec_encode_video2, avctx, avpkt, frame, got_packet_ptr);
+}