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Side by Side Diff: src/opts/SkColor_opts_neon.h

Issue 23724013: ARM Skia NEON patches - 29 - Xfermode: SkFourByteInterp (Closed) Base URL: https://skia.googlecode.com/svn/trunk
Patch Set: Review comments Created 7 years ago
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1 #ifndef SkColor_opts_neon_DEFINED 1 #ifndef SkColor_opts_neon_DEFINED
2 #define SkColor_opts_neon_DEFINED 2 #define SkColor_opts_neon_DEFINED
3 3
4 #include "SkTypes.h" 4 #include "SkTypes.h"
5 #include "SkColorPriv.h" 5 #include "SkColorPriv.h"
6 6
7 #include <arm_neon.h> 7 #include <arm_neon.h>
8 8
9 #define NEON_A (SK_A32_SHIFT / 8) 9 #define NEON_A (SK_A32_SHIFT / 8)
10 #define NEON_R (SK_R32_SHIFT / 8) 10 #define NEON_R (SK_R32_SHIFT / 8)
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75 src_wide = vreinterpretq_s16_u16(vmovl_u8(src)); 75 src_wide = vreinterpretq_s16_u16(vmovl_u8(src));
76 dst_wide = vreinterpretq_s16_u16(vmovl_u8(dst)); 76 dst_wide = vreinterpretq_s16_u16(vmovl_u8(dst));
77 77
78 src_wide = (src_wide - dst_wide) * vreinterpretq_s16_u16(scale); 78 src_wide = (src_wide - dst_wide) * vreinterpretq_s16_u16(scale);
79 79
80 dst_wide += vshrq_n_s16(src_wide, 5); 80 dst_wide += vshrq_n_s16(src_wide, 5);
81 81
82 return vmovn_u16(vreinterpretq_u16_s16(dst_wide)); 82 return vmovn_u16(vreinterpretq_u16_s16(dst_wide));
83 } 83 }
84 84
85 static inline SkPMColor SkFourByteInterp256_neon(SkPMColor src, SkPMColor dst,
86 unsigned srcScale) {
87 SkASSERT(srcScale <= 256);
88 int16x8_t vscale = vdupq_n_s16(srcScale);
89 int16x8_t vsrc_wide, vdst_wide, vdiff;
90 uint8x8_t res;
91
92 vsrc_wide = vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_u32(vdup_n_u32(sr c))));
93 vdst_wide = vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_u32(vdup_n_u32(ds t))));
94
95 vdiff = vsrc_wide - vdst_wide;
96 vdiff *= vscale;
97
98 vdiff = vshrq_n_s16(vdiff, 8);
99
100 vdst_wide += vdiff;
101
102 res = vmovn_u16(vreinterpretq_u16_s16(vdst_wide));
103
104 return vget_lane_u32(vreinterpret_u32_u8(res), 0);
105 }
106
107 static inline SkPMColor SkFourByteInterp_neon(SkPMColor src, SkPMColor dst,
108 U8CPU srcWeight) {
109 SkASSERT(srcWeight <= 255);
110 unsigned scale = SkAlpha255To256(srcWeight);
111 return SkFourByteInterp256_neon(src, dst, scale);
112 }
113
85 #endif /* #ifndef SkColor_opts_neon_DEFINED */ 114 #endif /* #ifndef SkColor_opts_neon_DEFINED */
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