| Message ID | 20220530190911.20843-2-michael@niedermayer.cc |
|---|---|
| State | New |
| Headers | show |
| Series | [FFmpeg-devel,1/2] avutil/opt: Alpha workaround | expand |
| Context | Check | Description |
|---|---|---|
| yinshiyou/make_loongarch64 | success | Make finished |
| yinshiyou/make_fate_loongarch64 | success | Make fate finished |
| andriy/make_armv7_RPi4 | success | Make finished |
| andriy/make_fate_armv7_RPi4 | success | Make fate finished |
diff --git a/libavcodec/ffv1enc.c b/libavcodec/ffv1enc.c index 9849082e44..9609877498 100644 --- a/libavcodec/ffv1enc.c +++ b/libavcodec/ffv1enc.c @@ -142,8 +142,10 @@ static void find_best_state(uint8_t best_state[256][256], int i, j, k, m; uint32_t l2tab[256]; - for (i = 1; i < 256; i++) + l2tab[1] = -log2(1 / 256.0) * ((1U << 31) / 8); + for (i = 2; i < 256; i++) { l2tab[i] = -log2(i / 256.0) * ((1U << 31) / 8); + } for (i = 0; i < 256; i++) { uint64_t best_len[256];
alpha-linux-gnu-gcc-5 (Ubuntu 5.5.0-12ubuntu1) 5.5.0 20171010 with qemu-alpha version 2.11.1(Debian 1:2.11+dfsg-1ubuntu7.39) trigger a FPE on the first iteration None of the intermediate values when printed shows an anomaly nor does casting the final value. I did not investigate this further by looking at the asm but that would be probably where to continue looking at this if someone is interrested in alpha. Signed-off-by: Michael Niedermayer <michael@niedermayer.cc> --- libavcodec/ffv1enc.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-)