1 #ifndef SkColor_opts_neon_DEFINED 2 #define SkColor_opts_neon_DEFINED 3 4 #include "SkTypes.h" 5 #include "SkColorPriv.h" 6 7 #include <arm_neon.h> 8 9 #define NEON_A (SK_A32_SHIFT / 8) 10 #define NEON_R (SK_R32_SHIFT / 8) 11 #define NEON_G (SK_G32_SHIFT / 8) 12 #define NEON_B (SK_B32_SHIFT / 8) 13 14 static inline uint16x8_t SkAlpha255To256_neon8(uint8x8_t alpha) { 15 return vaddw_u8(vdupq_n_u16(1), alpha); 16 } 17 18 static inline uint8x8_t SkAlphaMul_neon8(uint8x8_t color, uint16x8_t scale) { 19 return vshrn_n_u16(vmovl_u8(color) * scale, 8); 20 } 21 22 static inline uint8x8x4_t SkAlphaMulQ_neon8(uint8x8x4_t color, uint16x8_t scale) { 23 uint8x8x4_t ret; 24 25 ret.val[NEON_A] = SkAlphaMul_neon8(color.val[NEON_A], scale); 26 ret.val[NEON_R] = SkAlphaMul_neon8(color.val[NEON_R], scale); 27 ret.val[NEON_G] = SkAlphaMul_neon8(color.val[NEON_G], scale); 28 ret.val[NEON_B] = SkAlphaMul_neon8(color.val[NEON_B], scale); 29 30 return ret; 31 } 32 33 /* This function expands 8 pixels from RGB565 (R, G, B from high to low) to 34 * SkPMColor (all possible configurations supported) in the exact same way as 35 * SkPixel16ToPixel32. 36 */ 37 static inline uint8x8x4_t SkPixel16ToPixel32_neon8(uint16x8_t vsrc) { 38 39 uint8x8x4_t ret; 40 uint8x8_t vr, vg, vb; 41 42 vr = vmovn_u16(vshrq_n_u16(vsrc, SK_R16_SHIFT)); 43 vg = vmovn_u16(vshrq_n_u16(vshlq_n_u16(vsrc, SK_R16_BITS), SK_R16_BITS + SK_B16_BITS)); 44 vb = vmovn_u16(vsrc & vdupq_n_u16(SK_B16_MASK)); 45 46 ret.val[NEON_A] = vdup_n_u8(0xFF); 47 ret.val[NEON_R] = vshl_n_u8(vr, 8 - SK_R16_BITS) | vshr_n_u8(vr, 2 * SK_R16_BITS - 8); 48 ret.val[NEON_G] = vshl_n_u8(vg, 8 - SK_G16_BITS) | vshr_n_u8(vg, 2 * SK_G16_BITS - 8); 49 ret.val[NEON_B] = vshl_n_u8(vb, 8 - SK_B16_BITS) | vshr_n_u8(vb, 2 * SK_B16_BITS - 8); 50 51 return ret; 52 } 53 54 /* This function packs 8 pixels from SkPMColor (all possible configurations 55 * supported) to RGB565 (R, G, B from high to low) in the exact same way as 56 * SkPixel32ToPixel16. 57 */ 58 static inline uint16x8_t SkPixel32ToPixel16_neon8(uint8x8x4_t vsrc) { 59 60 uint16x8_t ret; 61 62 ret = vshll_n_u8(vsrc.val[NEON_R], 8); 63 ret = vsriq_n_u16(ret, vshll_n_u8(vsrc.val[NEON_G], 8), SK_R16_BITS); 64 ret = vsriq_n_u16(ret, vshll_n_u8(vsrc.val[NEON_B], 8), SK_R16_BITS + SK_G16_BITS); 65 66 return ret; 67 } 68 69 /* This function blends 8 pixels of the same channel in the exact same way as 70 * SkBlend32. 71 */ 72 static inline uint8x8_t SkBlend32_neon8(uint8x8_t src, uint8x8_t dst, uint16x8_t scale) { 73 int16x8_t src_wide, dst_wide; 74 75 src_wide = vreinterpretq_s16_u16(vmovl_u8(src)); 76 dst_wide = vreinterpretq_s16_u16(vmovl_u8(dst)); 77 78 src_wide = (src_wide - dst_wide) * vreinterpretq_s16_u16(scale); 79 80 dst_wide += vshrq_n_s16(src_wide, 5); 81 82 return vmovn_u16(vreinterpretq_u16_s16(dst_wide)); 83 } 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(src)))); 93 vdst_wide = vreinterpretq_s16_u16(vmovl_u8(vreinterpret_u8_u32(vdup_n_u32(dst)))); 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 } 113 114 #endif /* #ifndef SkColor_opts_neon_DEFINED */ 115
