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stream_encoder_intrin_sse[23].c : Optimize of int32 -> uint64 conversion. 

Optimizes int32 -> uint64 conversion by doing zero extension (int32 ->
uint32 -> uint64) instead of sign extension (int32 -> int64 -> uint64).

Patch-from: lvqcl <lvqcl.mail@gmail.com>
This commit is contained in:
Erik de Castro Lopo 2014-09-21 08:48:17 +10:00
parent 97bcc6f51a
commit 6abc480387
2 changed files with 2 additions and 2 deletions
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2
src/libFLAC/stream_encoder_intrin_sse2.c
View File

@ -95,7 +95,7 @@ void FLAC__precompute_partition_info_sums_intrin_sse2(const FLAC__int32 residual
mm_sum = _mm_add_epi32(mm_sum, _mm_srli_si128(mm_sum, 8));
mm_sum = _mm_add_epi32(mm_sum, _mm_srli_si128(mm_sum, 4));
abs_residual_partition_sums[partition] = _mm_cvtsi128_si32(mm_sum);
abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(mm_sum);
}
}
else { /* have to pessimistically use 64 bits for accumulator */

2
src/libFLAC/stream_encoder_intrin_ssse3.c
View File

@ -89,7 +89,7 @@ void FLAC__precompute_partition_info_sums_intrin_ssse3(const FLAC__int32 residua
mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
mm_sum = _mm_hadd_epi32(mm_sum, mm_sum);
abs_residual_partition_sums[partition] = _mm_cvtsi128_si32(mm_sum);
abs_residual_partition_sums[partition] = (FLAC__uint32)_mm_cvtsi128_si32(mm_sum);
}
}
else { /* have to pessimistically use 64 bits for accumulator */