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| author | Anurag Thakur <anurag105csec21@bpitindia.edu.in> | 2022-11-19 12:34:43 +0530 |
|---|---|---|
| committer | Anurag Thakur <anurag105csec21@bpitindia.edu.in> | 2022-11-19 12:34:43 +0530 |
| commit | bdeb70bc18d5537e45185f3195d2f055f1bbee87 (patch) | |
| tree | 663cef22f74eb5772240b2e19602b31460f934db | |
| parent | 03cc2183e0df8f29098377d60296ba5d950ce866 (diff) | |
| download | freetype2-bdeb70bc18d5537e45185f3195d2f055f1bbee87.tar.gz | |
[dense] Add SIMD support to rasterizer
* src/dense/ftdense: Use SSE4.1 for final accumulation step
(FT_SSE4_1): Macro which checks if SSE4.1 is available
* src/dense/rules.mk: Enable linking for SSE4.1
| -rw-r--r-- | src/dense/ftdense.c | 41 | ||||
| -rw-r--r-- | src/dense/rules.mk | 6 |
2 files changed, 43 insertions, 4 deletions
diff --git a/src/dense/ftdense.c b/src/dense/ftdense.c index 70c610885..a6b69f53e 100644 --- a/src/dense/ftdense.c +++ b/src/dense/ftdense.c @@ -12,6 +12,22 @@ #include "ftdense.h" #include "ftdenseerrs.h" +#if defined( __SSE4_1__ ) || \ + defined( __x86_64__ ) || \ + defined( _M_AMD64 ) || \ + ( defined( _M_IX86_FP ) && _M_IX86_FP >= 2 ) +# define FT_SSE4_1 1 +#else +# define FT_SSE4_1 0 +#endif + + +#if FT_SSE4_1 + + #include <tmmintrin.h> + +#endif + #define PIXEL_BITS 8 #define ONE_PIXEL ( 1 << PIXEL_BITS ) @@ -349,9 +365,30 @@ dense_render_glyph( dense_worker* worker, const FT_Bitmap* target ) &dense_decompose_funcs, worker ); // Render into bitmap const float* source = worker->m_a; - unsigned char* dest = target->buffer; unsigned char* dest_end = target->buffer + worker->m_w * worker->m_h; + +#if FT_SSE4_1 + + __m128 offset = _mm_setzero_ps(); + __m128i mask = _mm_set1_epi32(0x0c080400); + __m128 sign_mask = _mm_set1_ps(-0.f); + for (int i = 0; i < worker->m_h*worker->m_w; i += 4) { + __m128 x = _mm_load_ps(&source[i]); + x = _mm_add_ps(x, _mm_castsi128_ps(_mm_slli_si128(_mm_castps_si128(x), 4))); + x = _mm_add_ps(x, _mm_shuffle_ps(_mm_setzero_ps(), x, 0x40)); + x = _mm_add_ps(x, offset); + __m128 y = _mm_andnot_ps(sign_mask, x); // fabs(x) + y = _mm_min_ps(y, _mm_set1_ps(1.0f)); + y = _mm_mul_ps(y, _mm_set1_ps(255.0f)); + __m128i z = _mm_cvtps_epi32(y); + z = _mm_shuffle_epi8(z, mask); + _mm_store_ss((float *)&dest[i], (__m128)z); + offset = _mm_shuffle_ps(x, x, _MM_SHUFFLE(3, 3, 3, 3)); + } + +#else /* FT_SSE4_1 */ + float value = 0.0f; while ( dest < dest_end ) { @@ -368,6 +405,8 @@ dense_render_glyph( dense_worker* worker, const FT_Bitmap* target ) dest++; } +#endif /* FT_SSE4_1 */ + free(worker->m_a); return error; } diff --git a/src/dense/rules.mk b/src/dense/rules.mk index 005116873..306a068f6 100644 --- a/src/dense/rules.mk +++ b/src/dense/rules.mk @@ -22,9 +22,9 @@ DENSE_DIR := $(SRC_DIR)/dense # DENSE_COMPILE := $(CC) $(ANSIFLAGS) \ $I$(subst /,$(COMPILER_SEP),$(DENSE_DIR)) \ - $(INCLUDE_FLAGS) \ - $(FT_CFLAGS) - + $(INCLUDE_FLAGS) \ + $(FT_CFLAGS) \ + "-msse4.1" # DENSE driver sources (i.e., C files) # |