diff options
Diffstat (limited to 'tests/checkasm')
| -rw-r--r-- | tests/checkasm/aacpsdsp.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/tests/checkasm/aacpsdsp.c b/tests/checkasm/aacpsdsp.c index ea68b39fa9..2ceef4341f 100644 --- a/tests/checkasm/aacpsdsp.c +++ b/tests/checkasm/aacpsdsp.c @@ -17,6 +17,7 @@ */ #include "libavcodec/aacpsdsp.h" +#include "libavutil/intfloat.h" #include "checkasm.h" @@ -34,6 +35,16 @@ #define EPS 0.005 +static void clear_less_significant_bits(INTFLOAT *buf, int len, int bits) +{ + int i; + for (i = 0; i < len; i++) { + union av_intfloat32 u = { .f = buf[i] }; + u.i &= (0xffffffff << bits); + buf[i] = u.f; + } +} + static void test_add_squares(void) { LOCAL_ALIGNED_16(INTFLOAT, dst0, [BUF_SIZE]); @@ -198,6 +209,13 @@ static void test_stereo_interpolate(PSDSPContext *psdsp) randomize((INTFLOAT *)h, 2 * 4); randomize((INTFLOAT *)h_step, 2 * 4); + // Clear the least significant 14 bits of h_step, to avoid + // divergence when accumulating h_step BUF_SIZE times into + // a float variable which may or may not have extra intermediate + // precision. Therefore clear roughly log2(BUF_SIZE) less + // significant bits, to get the same result regardless of any + // extra precision in the accumulator. + clear_less_significant_bits((INTFLOAT *)h_step, 2 * 4, 14); call_ref(l0, r0, h, h_step, BUF_SIZE); call_new(l1, r1, h, h_step, BUF_SIZE); |