[FFmpeg-devel] [PATCH, v2 4/4] tests/checkasm: add overflow test for hevc_add_res

[Linjie Fu]

Add overflow test for hevc_add_res when int16_t coeff = -32768,
and doubled the test cases.

The result of C is good, while ASM is not.

To verify:
    make fate-checkasm-hevc_add_res
    ffmpeg/tests/checkasm/checkasm --test=hevc_add_res

./checkasm --test=hevc_add_res
checkasm: using random seed 679391863
MMXEXT:
    hevc_add_res_4x4_8_mmxext (hevc_add_res.c:69)
  - hevc_add_res.add_residual [FAILED]
SSE2:
    hevc_add_res_8x8_8_sse2 (hevc_add_res.c:69)
    hevc_add_res_16x16_8_sse2 (hevc_add_res.c:69)
    hevc_add_res_32x32_8_sse2 (hevc_add_res.c:69)
  - hevc_add_res.add_residual [FAILED]
AVX:
    hevc_add_res_8x8_8_avx (hevc_add_res.c:69)
    hevc_add_res_16x16_8_avx (hevc_add_res.c:69)
    hevc_add_res_32x32_8_avx (hevc_add_res.c:69)
  - hevc_add_res.add_residual [FAILED]
AVX2:
    hevc_add_res_32x32_8_avx2 (hevc_add_res.c:69)
  - hevc_add_res.add_residual [FAILED]
checkasm: 8 of 14 tests have failed

Signed-off-by: Xu Guangxin <guangxin.xu at intel.com>
Signed-off-by: Linjie Fu <linjie.fu at intel.com>
---
[v2]: test 2x cases to make sure enough random residuals
are tested.

 tests/checkasm/hevc_add_res.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tests/checkasm/hevc_add_res.c b/tests/checkasm/hevc_add_res.c
index e92c6b4..8c82ac1 100644
--- a/tests/checkasm/hevc_add_res.c
+++ b/tests/checkasm/hevc_add_res.c
@@ -58,6 +58,7 @@ static void check_add_res(HEVCDSPContext h, int bit_depth)
 
         randomize_buffers(res0, size);
         randomize_buffers2(dst0, size);
+        res0[0] = 0x8000;// overflow test
         memcpy(res1, res0, sizeof(*res0) * size);
         memcpy(dst1, dst0, sizeof(int16_t) * size);
 
@@ -80,6 +81,7 @@ void checkasm_check_hevc_add_res(void)
 
         ff_hevc_dsp_init(&h, bit_depth);
         check_add_res(h, bit_depth);
+        check_add_res(h, bit_depth);
     }
     report("add_residual");
 }
-- 
2.7.4