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| author | Philip Balister <philip@opensdr.com> | 2010-09-09 15:55:35 -0400 |
|---|---|---|
| committer | Philip Balister <philip@opensdr.com> | 2010-09-09 15:55:35 -0400 |
| commit | 4a757e64cbb513e6461e547f4d095b0539ae0b09 (patch) | |
| tree | fa862f73fe926b67d25027895b7f2eacf112fab2 /host | |
| parent | 262109bc461139448c816f92644a9f748798c4fc (diff) | |
| download | uhd-4a757e64cbb513e6461e547f4d095b0539ae0b09.tar.gz uhd-4a757e64cbb513e6461e547f4d095b0539ae0b09.tar.bz2 uhd-4a757e64cbb513e6461e547f4d095b0539ae0b09.zip | |
Convert fc32_to_item32_nswap to use ARM NEON if available.
Diffstat (limited to 'host')
| -rw-r--r-- | host/lib/transport/CMakeLists.txt | 6 | ||||
| -rw-r--r-- | host/lib/transport/convert_types_impl.hpp | 24 |
2 files changed, 30 insertions, 0 deletions
diff --git a/host/lib/transport/CMakeLists.txt b/host/lib/transport/CMakeLists.txt index 753fd5e85..43449d732 100644 --- a/host/lib/transport/CMakeLists.txt +++ b/host/lib/transport/CMakeLists.txt @@ -45,6 +45,12 @@ IF(HAVE_EMMINTRIN_H) ADD_DEFINITIONS(-DHAVE_EMMINTRIN_H) ENDIF(HAVE_EMMINTRIN_H) +INCLUDE(CheckIncludeFileCXX) +CHECK_INCLUDE_FILE_CXX(arm_neon.h HAVE_ARM_NEON_H) + +IF(HAVE_ARM_NEON_H) + ADD_DEFINITIONS(-DHAVE_ARM_NEON_H) +ENDIF(HAVE_ARM_NEON_H) ######################################################################## # Setup defines for interface address discovery ######################################################################## diff --git a/host/lib/transport/convert_types_impl.hpp b/host/lib/transport/convert_types_impl.hpp index 90618dec6..6cfc8fed6 100644 --- a/host/lib/transport/convert_types_impl.hpp +++ b/host/lib/transport/convert_types_impl.hpp @@ -32,6 +32,14 @@ #include <emmintrin.h> #endif +#ifdef HAVE_ARM_NEON_H + #define USE_ARM_NEON_H +#endif + +#if defined(USE_ARM_NEON_H) + #include <arm_neon.h> +#endif + /*********************************************************************** * Typedefs **********************************************************************/ @@ -135,6 +143,22 @@ static UHD_INLINE void fc32_to_item32_nswap( } } +#elif defined(USE_ARM_NEON_H) +static UHD_INLINE void fc32_to_item32_nswap( + const fc32_t *input, item32_t *output, size_t nsamps) +{ + size_t i; + + float32x4_t Q0 = vdupq_n_f32(shorts_per_float); + for (i=0; i < (nsamps & ~0x03); i+=4) { + float32x4_t Q1 = vld1q_f32(reinterpret_cast<const float *>(&input[i])); + float32x4_t Q2 = vmulq_f32(Q1, Q0); + int32x4_t Q3 = vcvtq_s32_f32(Q2); + int16x4_t D8 = vmovn_s32(Q3); + vst1_s16((reinterpret_cast<int16_t *>(&output[i])), D8); + } +} + #else static UHD_INLINE void fc32_to_item32_nswap( const fc32_t *input, item32_t *output, size_t nsamps |