| /* |
| * Copyright 2012 The Android Open Source Project |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "SkBlitRow_opts_arm_neon.h" |
| |
| #include "SkBlitMask.h" |
| #include "SkBlitRow.h" |
| #include "SkColorPriv.h" |
| #include "SkDither.h" |
| #include "SkMathPriv.h" |
| #include "SkUtils.h" |
| |
| #include "SkColor_opts_neon.h" |
| #include <arm_neon.h> |
| |
| #ifdef SK_CPU_ARM64 |
| static inline uint8x8x4_t sk_vld4_u8_arm64_3(const SkPMColor* SK_RESTRICT & src) { |
| uint8x8x4_t vsrc; |
| uint8x8_t vsrc_0, vsrc_1, vsrc_2; |
| |
| asm ( |
| "ld4 {v0.8b - v3.8b}, [%[src]], #32 \t\n" |
| "mov %[vsrc0].8b, v0.8b \t\n" |
| "mov %[vsrc1].8b, v1.8b \t\n" |
| "mov %[vsrc2].8b, v2.8b \t\n" |
| : [vsrc0] "=w" (vsrc_0), [vsrc1] "=w" (vsrc_1), |
| [vsrc2] "=w" (vsrc_2), [src] "+&r" (src) |
| : : "v0", "v1", "v2", "v3" |
| ); |
| |
| vsrc.val[0] = vsrc_0; |
| vsrc.val[1] = vsrc_1; |
| vsrc.val[2] = vsrc_2; |
| |
| return vsrc; |
| } |
| |
| static inline uint8x8x4_t sk_vld4_u8_arm64_4(const SkPMColor* SK_RESTRICT & src) { |
| uint8x8x4_t vsrc; |
| uint8x8_t vsrc_0, vsrc_1, vsrc_2, vsrc_3; |
| |
| asm ( |
| "ld4 {v0.8b - v3.8b}, [%[src]], #32 \t\n" |
| "mov %[vsrc0].8b, v0.8b \t\n" |
| "mov %[vsrc1].8b, v1.8b \t\n" |
| "mov %[vsrc2].8b, v2.8b \t\n" |
| "mov %[vsrc3].8b, v3.8b \t\n" |
| : [vsrc0] "=w" (vsrc_0), [vsrc1] "=w" (vsrc_1), |
| [vsrc2] "=w" (vsrc_2), [vsrc3] "=w" (vsrc_3), |
| [src] "+&r" (src) |
| : : "v0", "v1", "v2", "v3" |
| ); |
| |
| vsrc.val[0] = vsrc_0; |
| vsrc.val[1] = vsrc_1; |
| vsrc.val[2] = vsrc_2; |
| vsrc.val[3] = vsrc_3; |
| |
| return vsrc; |
| } |
| #endif |
| |
| void S32_D565_Opaque_neon(uint16_t* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| U8CPU alpha, int /*x*/, int /*y*/) { |
| SkASSERT(255 == alpha); |
| |
| while (count >= 8) { |
| uint8x8x4_t vsrc; |
| uint16x8_t vdst; |
| |
| // Load |
| #ifdef SK_CPU_ARM64 |
| vsrc = sk_vld4_u8_arm64_3(src); |
| #else |
| vsrc = vld4_u8((uint8_t*)src); |
| src += 8; |
| #endif |
| |
| // Convert src to 565 |
| vdst = SkPixel32ToPixel16_neon8(vsrc); |
| |
| // Store |
| vst1q_u16(dst, vdst); |
| |
| // Prepare next iteration |
| dst += 8; |
| count -= 8; |
| }; |
| |
| // Leftovers |
| while (count > 0) { |
| SkPMColor c = *src++; |
| SkPMColorAssert(c); |
| *dst = SkPixel32ToPixel16_ToU16(c); |
| dst++; |
| count--; |
| }; |
| } |
| |
| void S32_D565_Blend_neon(uint16_t* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| U8CPU alpha, int /*x*/, int /*y*/) { |
| SkASSERT(255 > alpha); |
| |
| uint16x8_t vmask_blue, vscale; |
| |
| // prepare constants |
| vscale = vdupq_n_u16(SkAlpha255To256(alpha)); |
| vmask_blue = vmovq_n_u16(0x1F); |
| |
| while (count >= 8) { |
| uint8x8x4_t vsrc; |
| uint16x8_t vdst, vdst_r, vdst_g, vdst_b; |
| uint16x8_t vres_r, vres_g, vres_b; |
| |
| // Load src |
| #ifdef SK_CPU_ARM64 |
| vsrc = sk_vld4_u8_arm64_3(src); |
| #else |
| { |
| register uint8x8_t d0 asm("d0"); |
| register uint8x8_t d1 asm("d1"); |
| register uint8x8_t d2 asm("d2"); |
| register uint8x8_t d3 asm("d3"); |
| |
| asm ( |
| "vld4.8 {d0-d3},[%[src]]!" |
| : "=w" (d0), "=w" (d1), "=w" (d2), "=w" (d3), [src] "+&r" (src) |
| : |
| ); |
| vsrc.val[0] = d0; |
| vsrc.val[1] = d1; |
| vsrc.val[2] = d2; |
| } |
| #endif |
| |
| // Load and unpack dst |
| vdst = vld1q_u16(dst); |
| vdst_g = vshlq_n_u16(vdst, 5); // shift green to top of lanes |
| vdst_b = vandq_u16(vdst, vmask_blue); // extract blue |
| vdst_r = vshrq_n_u16(vdst, 6+5); // extract red |
| vdst_g = vshrq_n_u16(vdst_g, 5+5); // extract green |
| |
| // Shift src to 565 range |
| vsrc.val[NEON_R] = vshr_n_u8(vsrc.val[NEON_R], 3); |
| vsrc.val[NEON_G] = vshr_n_u8(vsrc.val[NEON_G], 2); |
| vsrc.val[NEON_B] = vshr_n_u8(vsrc.val[NEON_B], 3); |
| |
| // Scale src - dst |
| vres_r = vmovl_u8(vsrc.val[NEON_R]) - vdst_r; |
| vres_g = vmovl_u8(vsrc.val[NEON_G]) - vdst_g; |
| vres_b = vmovl_u8(vsrc.val[NEON_B]) - vdst_b; |
| |
| vres_r = vshrq_n_u16(vres_r * vscale, 8); |
| vres_g = vshrq_n_u16(vres_g * vscale, 8); |
| vres_b = vshrq_n_u16(vres_b * vscale, 8); |
| |
| vres_r += vdst_r; |
| vres_g += vdst_g; |
| vres_b += vdst_b; |
| |
| // Combine |
| vres_b = vsliq_n_u16(vres_b, vres_g, 5); // insert green into blue |
| vres_b = vsliq_n_u16(vres_b, vres_r, 6+5); // insert red into green/blue |
| |
| // Store |
| vst1q_u16(dst, vres_b); |
| dst += 8; |
| count -= 8; |
| } |
| if (count > 0) { |
| int scale = SkAlpha255To256(alpha); |
| do { |
| SkPMColor c = *src++; |
| SkPMColorAssert(c); |
| uint16_t d = *dst; |
| *dst++ = SkPackRGB16( |
| SkAlphaBlend(SkPacked32ToR16(c), SkGetPackedR16(d), scale), |
| SkAlphaBlend(SkPacked32ToG16(c), SkGetPackedG16(d), scale), |
| SkAlphaBlend(SkPacked32ToB16(c), SkGetPackedB16(d), scale)); |
| } while (--count != 0); |
| } |
| } |
| |
| #ifdef SK_CPU_ARM32 |
| void S32A_D565_Opaque_neon(uint16_t* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| U8CPU alpha, int /*x*/, int /*y*/) { |
| SkASSERT(255 == alpha); |
| |
| if (count >= 8) { |
| uint16_t* SK_RESTRICT keep_dst = 0; |
| |
| asm volatile ( |
| "ands ip, %[count], #7 \n\t" |
| "vmov.u8 d31, #1<<7 \n\t" |
| "vld1.16 {q12}, [%[dst]] \n\t" |
| "vld4.8 {d0-d3}, [%[src]] \n\t" |
| // Thumb does not support the standard ARM conditional |
| // instructions but instead requires the 'it' instruction |
| // to signal conditional execution |
| "it eq \n\t" |
| "moveq ip, #8 \n\t" |
| "mov %[keep_dst], %[dst] \n\t" |
| |
| "add %[src], %[src], ip, LSL#2 \n\t" |
| "add %[dst], %[dst], ip, LSL#1 \n\t" |
| "subs %[count], %[count], ip \n\t" |
| "b 9f \n\t" |
| // LOOP |
| "2: \n\t" |
| |
| "vld1.16 {q12}, [%[dst]]! \n\t" |
| "vld4.8 {d0-d3}, [%[src]]! \n\t" |
| "vst1.16 {q10}, [%[keep_dst]] \n\t" |
| "sub %[keep_dst], %[dst], #8*2 \n\t" |
| "subs %[count], %[count], #8 \n\t" |
| "9: \n\t" |
| "pld [%[dst],#32] \n\t" |
| // expand 0565 q12 to 8888 {d4-d7} |
| "vmovn.u16 d4, q12 \n\t" |
| "vshr.u16 q11, q12, #5 \n\t" |
| "vshr.u16 q10, q12, #6+5 \n\t" |
| "vmovn.u16 d5, q11 \n\t" |
| "vmovn.u16 d6, q10 \n\t" |
| "vshl.u8 d4, d4, #3 \n\t" |
| "vshl.u8 d5, d5, #2 \n\t" |
| "vshl.u8 d6, d6, #3 \n\t" |
| |
| "vmovl.u8 q14, d31 \n\t" |
| "vmovl.u8 q13, d31 \n\t" |
| "vmovl.u8 q12, d31 \n\t" |
| |
| // duplicate in 4/2/1 & 8pix vsns |
| "vmvn.8 d30, d3 \n\t" |
| "vmlal.u8 q14, d30, d6 \n\t" |
| "vmlal.u8 q13, d30, d5 \n\t" |
| "vmlal.u8 q12, d30, d4 \n\t" |
| "vshr.u16 q8, q14, #5 \n\t" |
| "vshr.u16 q9, q13, #6 \n\t" |
| "vaddhn.u16 d6, q14, q8 \n\t" |
| "vshr.u16 q8, q12, #5 \n\t" |
| "vaddhn.u16 d5, q13, q9 \n\t" |
| "vqadd.u8 d6, d6, d0 \n\t" // moved up |
| "vaddhn.u16 d4, q12, q8 \n\t" |
| // intentionally don't calculate alpha |
| // result in d4-d6 |
| |
| "vqadd.u8 d5, d5, d1 \n\t" |
| "vqadd.u8 d4, d4, d2 \n\t" |
| |
| // pack 8888 {d4-d6} to 0565 q10 |
| "vshll.u8 q10, d6, #8 \n\t" |
| "vshll.u8 q3, d5, #8 \n\t" |
| "vshll.u8 q2, d4, #8 \n\t" |
| "vsri.u16 q10, q3, #5 \n\t" |
| "vsri.u16 q10, q2, #11 \n\t" |
| |
| "bne 2b \n\t" |
| |
| "1: \n\t" |
| "vst1.16 {q10}, [%[keep_dst]] \n\t" |
| : [count] "+r" (count) |
| : [dst] "r" (dst), [keep_dst] "r" (keep_dst), [src] "r" (src) |
| : "ip", "cc", "memory", "d0","d1","d2","d3","d4","d5","d6","d7", |
| "d16","d17","d18","d19","d20","d21","d22","d23","d24","d25","d26","d27","d28","d29", |
| "d30","d31" |
| ); |
| } |
| else |
| { // handle count < 8 |
| uint16_t* SK_RESTRICT keep_dst = 0; |
| |
| asm volatile ( |
| "vmov.u8 d31, #1<<7 \n\t" |
| "mov %[keep_dst], %[dst] \n\t" |
| |
| "tst %[count], #4 \n\t" |
| "beq 14f \n\t" |
| "vld1.16 {d25}, [%[dst]]! \n\t" |
| "vld1.32 {q1}, [%[src]]! \n\t" |
| |
| "14: \n\t" |
| "tst %[count], #2 \n\t" |
| "beq 12f \n\t" |
| "vld1.32 {d24[1]}, [%[dst]]! \n\t" |
| "vld1.32 {d1}, [%[src]]! \n\t" |
| |
| "12: \n\t" |
| "tst %[count], #1 \n\t" |
| "beq 11f \n\t" |
| "vld1.16 {d24[1]}, [%[dst]]! \n\t" |
| "vld1.32 {d0[1]}, [%[src]]! \n\t" |
| |
| "11: \n\t" |
| // unzips achieve the same as a vld4 operation |
| "vuzpq.u16 q0, q1 \n\t" |
| "vuzp.u8 d0, d1 \n\t" |
| "vuzp.u8 d2, d3 \n\t" |
| // expand 0565 q12 to 8888 {d4-d7} |
| "vmovn.u16 d4, q12 \n\t" |
| "vshr.u16 q11, q12, #5 \n\t" |
| "vshr.u16 q10, q12, #6+5 \n\t" |
| "vmovn.u16 d5, q11 \n\t" |
| "vmovn.u16 d6, q10 \n\t" |
| "vshl.u8 d4, d4, #3 \n\t" |
| "vshl.u8 d5, d5, #2 \n\t" |
| "vshl.u8 d6, d6, #3 \n\t" |
| |
| "vmovl.u8 q14, d31 \n\t" |
| "vmovl.u8 q13, d31 \n\t" |
| "vmovl.u8 q12, d31 \n\t" |
| |
| // duplicate in 4/2/1 & 8pix vsns |
| "vmvn.8 d30, d3 \n\t" |
| "vmlal.u8 q14, d30, d6 \n\t" |
| "vmlal.u8 q13, d30, d5 \n\t" |
| "vmlal.u8 q12, d30, d4 \n\t" |
| "vshr.u16 q8, q14, #5 \n\t" |
| "vshr.u16 q9, q13, #6 \n\t" |
| "vaddhn.u16 d6, q14, q8 \n\t" |
| "vshr.u16 q8, q12, #5 \n\t" |
| "vaddhn.u16 d5, q13, q9 \n\t" |
| "vqadd.u8 d6, d6, d0 \n\t" // moved up |
| "vaddhn.u16 d4, q12, q8 \n\t" |
| // intentionally don't calculate alpha |
| // result in d4-d6 |
| |
| "vqadd.u8 d5, d5, d1 \n\t" |
| "vqadd.u8 d4, d4, d2 \n\t" |
| |
| // pack 8888 {d4-d6} to 0565 q10 |
| "vshll.u8 q10, d6, #8 \n\t" |
| "vshll.u8 q3, d5, #8 \n\t" |
| "vshll.u8 q2, d4, #8 \n\t" |
| "vsri.u16 q10, q3, #5 \n\t" |
| "vsri.u16 q10, q2, #11 \n\t" |
| |
| // store |
| "tst %[count], #4 \n\t" |
| "beq 24f \n\t" |
| "vst1.16 {d21}, [%[keep_dst]]! \n\t" |
| |
| "24: \n\t" |
| "tst %[count], #2 \n\t" |
| "beq 22f \n\t" |
| "vst1.32 {d20[1]}, [%[keep_dst]]! \n\t" |
| |
| "22: \n\t" |
| "tst %[count], #1 \n\t" |
| "beq 21f \n\t" |
| "vst1.16 {d20[1]}, [%[keep_dst]]! \n\t" |
| |
| "21: \n\t" |
| : [count] "+r" (count) |
| : [dst] "r" (dst), [keep_dst] "r" (keep_dst), [src] "r" (src) |
| : "ip", "cc", "memory", "d0","d1","d2","d3","d4","d5","d6","d7", |
| "d16","d17","d18","d19","d20","d21","d22","d23","d24","d25","d26","d27","d28","d29", |
| "d30","d31" |
| ); |
| } |
| } |
| #endif |
| |
| static inline uint16x8_t SkDiv255Round_neon8(uint16x8_t prod) { |
| prod += vdupq_n_u16(128); |
| prod += vshrq_n_u16(prod, 8); |
| return vshrq_n_u16(prod, 8); |
| } |
| |
| void S32A_D565_Blend_neon(uint16_t* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, int count, |
| U8CPU alpha, int /*x*/, int /*y*/) { |
| SkASSERT(255 > alpha); |
| |
| /* This code implements a Neon version of S32A_D565_Blend. The results have |
| * a few mismatches compared to the original code. These mismatches never |
| * exceed 1. |
| */ |
| |
| if (count >= 8) { |
| uint16x8_t valpha_max, vmask_blue; |
| uint8x8_t valpha; |
| |
| // prepare constants |
| valpha_max = vmovq_n_u16(255); |
| valpha = vdup_n_u8(alpha); |
| vmask_blue = vmovq_n_u16(SK_B16_MASK); |
| |
| do { |
| uint16x8_t vdst, vdst_r, vdst_g, vdst_b; |
| uint16x8_t vres_a, vres_r, vres_g, vres_b; |
| uint8x8x4_t vsrc; |
| |
| // load pixels |
| vdst = vld1q_u16(dst); |
| #ifdef SK_CPU_ARM64 |
| vsrc = sk_vld4_u8_arm64_4(src); |
| #else |
| #if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 6)) |
| asm ( |
| "vld4.u8 %h[vsrc], [%[src]]!" |
| : [vsrc] "=w" (vsrc), [src] "+&r" (src) |
| : : |
| ); |
| #else |
| register uint8x8_t d0 asm("d0"); |
| register uint8x8_t d1 asm("d1"); |
| register uint8x8_t d2 asm("d2"); |
| register uint8x8_t d3 asm("d3"); |
| |
| asm volatile ( |
| "vld4.u8 {d0-d3},[%[src]]!;" |
| : "=w" (d0), "=w" (d1), "=w" (d2), "=w" (d3), |
| [src] "+&r" (src) |
| : : |
| ); |
| vsrc.val[0] = d0; |
| vsrc.val[1] = d1; |
| vsrc.val[2] = d2; |
| vsrc.val[3] = d3; |
| #endif |
| #endif // #ifdef SK_CPU_ARM64 |
| |
| |
| // deinterleave dst |
| vdst_g = vshlq_n_u16(vdst, SK_R16_BITS); // shift green to top of lanes |
| vdst_b = vdst & vmask_blue; // extract blue |
| vdst_r = vshrq_n_u16(vdst, SK_R16_SHIFT); // extract red |
| vdst_g = vshrq_n_u16(vdst_g, SK_R16_BITS + SK_B16_BITS); // extract green |
| |
| // shift src to 565 |
| vsrc.val[NEON_R] = vshr_n_u8(vsrc.val[NEON_R], 8 - SK_R16_BITS); |
| vsrc.val[NEON_G] = vshr_n_u8(vsrc.val[NEON_G], 8 - SK_G16_BITS); |
| vsrc.val[NEON_B] = vshr_n_u8(vsrc.val[NEON_B], 8 - SK_B16_BITS); |
| |
| // calc src * src_scale |
| vres_a = vmull_u8(vsrc.val[NEON_A], valpha); |
| vres_r = vmull_u8(vsrc.val[NEON_R], valpha); |
| vres_g = vmull_u8(vsrc.val[NEON_G], valpha); |
| vres_b = vmull_u8(vsrc.val[NEON_B], valpha); |
| |
| // prepare dst_scale |
| vres_a = SkDiv255Round_neon8(vres_a); |
| vres_a = valpha_max - vres_a; // 255 - (sa * src_scale) / 255 |
| |
| // add dst * dst_scale to previous result |
| vres_r = vmlaq_u16(vres_r, vdst_r, vres_a); |
| vres_g = vmlaq_u16(vres_g, vdst_g, vres_a); |
| vres_b = vmlaq_u16(vres_b, vdst_b, vres_a); |
| |
| #ifdef S32A_D565_BLEND_EXACT |
| // It is possible to get exact results with this but it is slow, |
| // even slower than C code in some cases |
| vres_r = SkDiv255Round_neon8(vres_r); |
| vres_g = SkDiv255Round_neon8(vres_g); |
| vres_b = SkDiv255Round_neon8(vres_b); |
| #else |
| vres_r = vrshrq_n_u16(vres_r, 8); |
| vres_g = vrshrq_n_u16(vres_g, 8); |
| vres_b = vrshrq_n_u16(vres_b, 8); |
| #endif |
| // pack result |
| vres_b = vsliq_n_u16(vres_b, vres_g, SK_G16_SHIFT); // insert green into blue |
| vres_b = vsliq_n_u16(vres_b, vres_r, SK_R16_SHIFT); // insert red into green/blue |
| |
| // store |
| vst1q_u16(dst, vres_b); |
| dst += 8; |
| count -= 8; |
| } while (count >= 8); |
| } |
| |
| // leftovers |
| while (count-- > 0) { |
| SkPMColor sc = *src++; |
| if (sc) { |
| uint16_t dc = *dst; |
| unsigned dst_scale = 255 - SkMulDiv255Round(SkGetPackedA32(sc), alpha); |
| unsigned dr = SkMulS16(SkPacked32ToR16(sc), alpha) + SkMulS16(SkGetPackedR16(dc), dst_scale); |
| unsigned dg = SkMulS16(SkPacked32ToG16(sc), alpha) + SkMulS16(SkGetPackedG16(dc), dst_scale); |
| unsigned db = SkMulS16(SkPacked32ToB16(sc), alpha) + SkMulS16(SkGetPackedB16(dc), dst_scale); |
| *dst = SkPackRGB16(SkDiv255Round(dr), SkDiv255Round(dg), SkDiv255Round(db)); |
| } |
| dst += 1; |
| } |
| } |
| |
| /* dither matrix for Neon, derived from gDitherMatrix_3Bit_16. |
| * each dither value is spaced out into byte lanes, and repeated |
| * to allow an 8-byte load from offsets 0, 1, 2 or 3 from the |
| * start of each row. |
| */ |
| static const uint8_t gDitherMatrix_Neon[48] = { |
| 0, 4, 1, 5, 0, 4, 1, 5, 0, 4, 1, 5, |
| 6, 2, 7, 3, 6, 2, 7, 3, 6, 2, 7, 3, |
| 1, 5, 0, 4, 1, 5, 0, 4, 1, 5, 0, 4, |
| 7, 3, 6, 2, 7, 3, 6, 2, 7, 3, 6, 2, |
| |
| }; |
| |
| void S32_D565_Blend_Dither_neon(uint16_t *dst, const SkPMColor *src, |
| int count, U8CPU alpha, int x, int y) |
| { |
| |
| SkASSERT(255 > alpha); |
| |
| // rescale alpha to range 1 - 256 |
| int scale = SkAlpha255To256(alpha); |
| |
| if (count >= 8) { |
| /* select row and offset for dither array */ |
| const uint8_t *dstart = &gDitherMatrix_Neon[(y&3)*12 + (x&3)]; |
| |
| uint8x8_t vdither = vld1_u8(dstart); // load dither values |
| uint8x8_t vdither_g = vshr_n_u8(vdither, 1); // calc. green dither values |
| |
| int16x8_t vscale = vdupq_n_s16(scale); // duplicate scale into neon reg |
| uint16x8_t vmask_b = vdupq_n_u16(0x1F); // set up blue mask |
| |
| do { |
| |
| uint8x8x4_t vsrc; |
| uint8x8_t vsrc_r, vsrc_g, vsrc_b; |
| uint8x8_t vsrc565_r, vsrc565_g, vsrc565_b; |
| uint16x8_t vsrc_dit_r, vsrc_dit_g, vsrc_dit_b; |
| uint16x8_t vsrc_res_r, vsrc_res_g, vsrc_res_b; |
| uint16x8_t vdst; |
| uint16x8_t vdst_r, vdst_g, vdst_b; |
| int16x8_t vres_r, vres_g, vres_b; |
| int8x8_t vres8_r, vres8_g, vres8_b; |
| |
| // Load source and add dither |
| #ifdef SK_CPU_ARM64 |
| vsrc = sk_vld4_u8_arm64_3(src); |
| #else |
| { |
| register uint8x8_t d0 asm("d0"); |
| register uint8x8_t d1 asm("d1"); |
| register uint8x8_t d2 asm("d2"); |
| register uint8x8_t d3 asm("d3"); |
| |
| asm ( |
| "vld4.8 {d0-d3},[%[src]]! " |
| : "=w" (d0), "=w" (d1), "=w" (d2), "=w" (d3), [src] "+&r" (src) |
| : |
| ); |
| vsrc.val[0] = d0; |
| vsrc.val[1] = d1; |
| vsrc.val[2] = d2; |
| } |
| #endif |
| vsrc_r = vsrc.val[NEON_R]; |
| vsrc_g = vsrc.val[NEON_G]; |
| vsrc_b = vsrc.val[NEON_B]; |
| |
| vsrc565_g = vshr_n_u8(vsrc_g, 6); // calc. green >> 6 |
| vsrc565_r = vshr_n_u8(vsrc_r, 5); // calc. red >> 5 |
| vsrc565_b = vshr_n_u8(vsrc_b, 5); // calc. blue >> 5 |
| |
| vsrc_dit_g = vaddl_u8(vsrc_g, vdither_g); // add in dither to green and widen |
| vsrc_dit_r = vaddl_u8(vsrc_r, vdither); // add in dither to red and widen |
| vsrc_dit_b = vaddl_u8(vsrc_b, vdither); // add in dither to blue and widen |
| |
| vsrc_dit_r = vsubw_u8(vsrc_dit_r, vsrc565_r); // sub shifted red from result |
| vsrc_dit_g = vsubw_u8(vsrc_dit_g, vsrc565_g); // sub shifted green from result |
| vsrc_dit_b = vsubw_u8(vsrc_dit_b, vsrc565_b); // sub shifted blue from result |
| |
| vsrc_res_r = vshrq_n_u16(vsrc_dit_r, 3); |
| vsrc_res_g = vshrq_n_u16(vsrc_dit_g, 2); |
| vsrc_res_b = vshrq_n_u16(vsrc_dit_b, 3); |
| |
| // Load dst and unpack |
| vdst = vld1q_u16(dst); |
| vdst_g = vshrq_n_u16(vdst, 5); // shift down to get green |
| vdst_r = vshrq_n_u16(vshlq_n_u16(vdst, 5), 5+5); // double shift to extract red |
| vdst_b = vandq_u16(vdst, vmask_b); // mask to get blue |
| |
| // subtract dst from src and widen |
| vres_r = vsubq_s16(vreinterpretq_s16_u16(vsrc_res_r), vreinterpretq_s16_u16(vdst_r)); |
| vres_g = vsubq_s16(vreinterpretq_s16_u16(vsrc_res_g), vreinterpretq_s16_u16(vdst_g)); |
| vres_b = vsubq_s16(vreinterpretq_s16_u16(vsrc_res_b), vreinterpretq_s16_u16(vdst_b)); |
| |
| // multiply diffs by scale and shift |
| vres_r = vmulq_s16(vres_r, vscale); |
| vres_g = vmulq_s16(vres_g, vscale); |
| vres_b = vmulq_s16(vres_b, vscale); |
| |
| vres8_r = vshrn_n_s16(vres_r, 8); |
| vres8_g = vshrn_n_s16(vres_g, 8); |
| vres8_b = vshrn_n_s16(vres_b, 8); |
| |
| // add dst to result |
| vres_r = vaddw_s8(vreinterpretq_s16_u16(vdst_r), vres8_r); |
| vres_g = vaddw_s8(vreinterpretq_s16_u16(vdst_g), vres8_g); |
| vres_b = vaddw_s8(vreinterpretq_s16_u16(vdst_b), vres8_b); |
| |
| // put result into 565 format |
| vres_b = vsliq_n_s16(vres_b, vres_g, 5); // shift up green and insert into blue |
| vres_b = vsliq_n_s16(vres_b, vres_r, 6+5); // shift up red and insert into blue |
| |
| // Store result |
| vst1q_u16(dst, vreinterpretq_u16_s16(vres_b)); |
| |
| // Next iteration |
| dst += 8; |
| count -= 8; |
| |
| } while (count >= 8); |
| } |
| |
| // Leftovers |
| if (count > 0) { |
| int scale = SkAlpha255To256(alpha); |
| DITHER_565_SCAN(y); |
| do { |
| SkPMColor c = *src++; |
| SkPMColorAssert(c); |
| |
| int dither = DITHER_VALUE(x); |
| int sr = SkGetPackedR32(c); |
| int sg = SkGetPackedG32(c); |
| int sb = SkGetPackedB32(c); |
| sr = SkDITHER_R32To565(sr, dither); |
| sg = SkDITHER_G32To565(sg, dither); |
| sb = SkDITHER_B32To565(sb, dither); |
| |
| uint16_t d = *dst; |
| *dst++ = SkPackRGB16(SkAlphaBlend(sr, SkGetPackedR16(d), scale), |
| SkAlphaBlend(sg, SkGetPackedG16(d), scale), |
| SkAlphaBlend(sb, SkGetPackedB16(d), scale)); |
| DITHER_INC_X(x); |
| } while (--count != 0); |
| } |
| } |
| |
| void S32A_Opaque_BlitRow32_neon(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, |
| int count, U8CPU alpha) { |
| |
| SkASSERT(255 == alpha); |
| if (count > 0) { |
| |
| |
| uint8x8_t alpha_mask; |
| |
| static const uint8_t alpha_mask_setup[] = {3,3,3,3,7,7,7,7}; |
| alpha_mask = vld1_u8(alpha_mask_setup); |
| |
| /* do the NEON unrolled code */ |
| #define UNROLL 4 |
| while (count >= UNROLL) { |
| uint8x8_t src_raw, dst_raw, dst_final; |
| uint8x8_t src_raw_2, dst_raw_2, dst_final_2; |
| |
| /* The two prefetches below may make the code slighlty |
| * slower for small values of count but are worth having |
| * in the general case. |
| */ |
| __builtin_prefetch(src+32); |
| __builtin_prefetch(dst+32); |
| |
| /* get the source */ |
| src_raw = vreinterpret_u8_u32(vld1_u32(src)); |
| #if UNROLL > 2 |
| src_raw_2 = vreinterpret_u8_u32(vld1_u32(src+2)); |
| #endif |
| |
| /* get and hold the dst too */ |
| dst_raw = vreinterpret_u8_u32(vld1_u32(dst)); |
| #if UNROLL > 2 |
| dst_raw_2 = vreinterpret_u8_u32(vld1_u32(dst+2)); |
| #endif |
| |
| /* 1st and 2nd bits of the unrolling */ |
| { |
| uint8x8_t dst_cooked; |
| uint16x8_t dst_wide; |
| uint8x8_t alpha_narrow; |
| uint16x8_t alpha_wide; |
| |
| /* get the alphas spread out properly */ |
| alpha_narrow = vtbl1_u8(src_raw, alpha_mask); |
| alpha_wide = vsubw_u8(vdupq_n_u16(256), alpha_narrow); |
| |
| /* spread the dest */ |
| dst_wide = vmovl_u8(dst_raw); |
| |
| /* alpha mul the dest */ |
| dst_wide = vmulq_u16 (dst_wide, alpha_wide); |
| dst_cooked = vshrn_n_u16(dst_wide, 8); |
| |
| /* sum -- ignoring any byte lane overflows */ |
| dst_final = vadd_u8(src_raw, dst_cooked); |
| } |
| |
| #if UNROLL > 2 |
| /* the 3rd and 4th bits of our unrolling */ |
| { |
| uint8x8_t dst_cooked; |
| uint16x8_t dst_wide; |
| uint8x8_t alpha_narrow; |
| uint16x8_t alpha_wide; |
| |
| alpha_narrow = vtbl1_u8(src_raw_2, alpha_mask); |
| alpha_wide = vsubw_u8(vdupq_n_u16(256), alpha_narrow); |
| |
| /* spread the dest */ |
| dst_wide = vmovl_u8(dst_raw_2); |
| |
| /* alpha mul the dest */ |
| dst_wide = vmulq_u16 (dst_wide, alpha_wide); |
| dst_cooked = vshrn_n_u16(dst_wide, 8); |
| |
| /* sum -- ignoring any byte lane overflows */ |
| dst_final_2 = vadd_u8(src_raw_2, dst_cooked); |
| } |
| #endif |
| |
| vst1_u32(dst, vreinterpret_u32_u8(dst_final)); |
| #if UNROLL > 2 |
| vst1_u32(dst+2, vreinterpret_u32_u8(dst_final_2)); |
| #endif |
| |
| src += UNROLL; |
| dst += UNROLL; |
| count -= UNROLL; |
| } |
| #undef UNROLL |
| |
| /* do any residual iterations */ |
| while (--count >= 0) { |
| *dst = SkPMSrcOver(*src, *dst); |
| src += 1; |
| dst += 1; |
| } |
| } |
| } |
| |
| void S32A_Opaque_BlitRow32_neon_src_alpha(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, |
| int count, U8CPU alpha) { |
| SkASSERT(255 == alpha); |
| |
| if (count <= 0) |
| return; |
| |
| /* Use these to check if src is transparent or opaque */ |
| const unsigned int ALPHA_OPAQ = 0xFF000000; |
| const unsigned int ALPHA_TRANS = 0x00FFFFFF; |
| |
| #define UNROLL 4 |
| const SkPMColor* SK_RESTRICT src_end = src + count - (UNROLL + 1); |
| const SkPMColor* SK_RESTRICT src_temp = src; |
| |
| /* set up the NEON variables */ |
| uint8x8_t alpha_mask; |
| static const uint8_t alpha_mask_setup[] = {3,3,3,3,7,7,7,7}; |
| alpha_mask = vld1_u8(alpha_mask_setup); |
| |
| uint8x8_t src_raw, dst_raw, dst_final; |
| uint8x8_t src_raw_2, dst_raw_2, dst_final_2; |
| uint8x8_t dst_cooked; |
| uint16x8_t dst_wide; |
| uint8x8_t alpha_narrow; |
| uint16x8_t alpha_wide; |
| |
| /* choose the first processing type */ |
| if( src >= src_end) |
| goto TAIL; |
| if(*src <= ALPHA_TRANS) |
| goto ALPHA_0; |
| if(*src >= ALPHA_OPAQ) |
| goto ALPHA_255; |
| /* fall-thru */ |
| |
| ALPHA_1_TO_254: |
| do { |
| |
| /* get the source */ |
| src_raw = vreinterpret_u8_u32(vld1_u32(src)); |
| src_raw_2 = vreinterpret_u8_u32(vld1_u32(src+2)); |
| |
| /* get and hold the dst too */ |
| dst_raw = vreinterpret_u8_u32(vld1_u32(dst)); |
| dst_raw_2 = vreinterpret_u8_u32(vld1_u32(dst+2)); |
| |
| |
| /* get the alphas spread out properly */ |
| alpha_narrow = vtbl1_u8(src_raw, alpha_mask); |
| /* reflect SkAlpha255To256() semantics a+1 vs a+a>>7 */ |
| /* we collapsed (255-a)+1 ... */ |
| alpha_wide = vsubw_u8(vdupq_n_u16(256), alpha_narrow); |
| |
| /* spread the dest */ |
| dst_wide = vmovl_u8(dst_raw); |
| |
| /* alpha mul the dest */ |
| dst_wide = vmulq_u16 (dst_wide, alpha_wide); |
| dst_cooked = vshrn_n_u16(dst_wide, 8); |
| |
| /* sum -- ignoring any byte lane overflows */ |
| dst_final = vadd_u8(src_raw, dst_cooked); |
| |
| alpha_narrow = vtbl1_u8(src_raw_2, alpha_mask); |
| /* reflect SkAlpha255To256() semantics a+1 vs a+a>>7 */ |
| /* we collapsed (255-a)+1 ... */ |
| alpha_wide = vsubw_u8(vdupq_n_u16(256), alpha_narrow); |
| |
| /* spread the dest */ |
| dst_wide = vmovl_u8(dst_raw_2); |
| |
| /* alpha mul the dest */ |
| dst_wide = vmulq_u16 (dst_wide, alpha_wide); |
| dst_cooked = vshrn_n_u16(dst_wide, 8); |
| |
| /* sum -- ignoring any byte lane overflows */ |
| dst_final_2 = vadd_u8(src_raw_2, dst_cooked); |
| |
| vst1_u32(dst, vreinterpret_u32_u8(dst_final)); |
| vst1_u32(dst+2, vreinterpret_u32_u8(dst_final_2)); |
| |
| src += UNROLL; |
| dst += UNROLL; |
| |
| /* if 2 of the next pixels aren't between 1 and 254 |
| it might make sense to go to the optimized loops */ |
| if((src[0] <= ALPHA_TRANS && src[1] <= ALPHA_TRANS) || (src[0] >= ALPHA_OPAQ && src[1] >= ALPHA_OPAQ)) |
| break; |
| |
| } while(src < src_end); |
| |
| if (src >= src_end) |
| goto TAIL; |
| |
| if(src[0] >= ALPHA_OPAQ && src[1] >= ALPHA_OPAQ) |
| goto ALPHA_255; |
| |
| /*fall-thru*/ |
| |
| ALPHA_0: |
| |
| /*In this state, we know the current alpha is 0 and |
| we optimize for the next alpha also being zero. */ |
| src_temp = src; //so we don't have to increment dst every time |
| do { |
| if(*(++src) > ALPHA_TRANS) |
| break; |
| if(*(++src) > ALPHA_TRANS) |
| break; |
| if(*(++src) > ALPHA_TRANS) |
| break; |
| if(*(++src) > ALPHA_TRANS) |
| break; |
| } while(src < src_end); |
| |
| dst += (src - src_temp); |
| |
| /* no longer alpha 0, so determine where to go next. */ |
| if( src >= src_end) |
| goto TAIL; |
| if(*src >= ALPHA_OPAQ) |
| goto ALPHA_255; |
| else |
| goto ALPHA_1_TO_254; |
| |
| ALPHA_255: |
| while((src[0] & src[1] & src[2] & src[3]) >= ALPHA_OPAQ) { |
| dst[0]=src[0]; |
| dst[1]=src[1]; |
| dst[2]=src[2]; |
| dst[3]=src[3]; |
| src+=UNROLL; |
| dst+=UNROLL; |
| if(src >= src_end) |
| goto TAIL; |
| } |
| |
| //Handle remainder. |
| if(*src >= ALPHA_OPAQ) { *dst++ = *src++; |
| if(*src >= ALPHA_OPAQ) { *dst++ = *src++; |
| if(*src >= ALPHA_OPAQ) { *dst++ = *src++; } |
| } |
| } |
| |
| if( src >= src_end) |
| goto TAIL; |
| if(*src <= ALPHA_TRANS) |
| goto ALPHA_0; |
| else |
| goto ALPHA_1_TO_254; |
| |
| TAIL: |
| /* do any residual iterations */ |
| src_end += UNROLL + 1; //goto the real end |
| while(src != src_end) { |
| if( *src != 0 ) { |
| if( *src >= ALPHA_OPAQ ) { |
| *dst = *src; |
| } |
| else { |
| *dst = SkPMSrcOver(*src, *dst); |
| } |
| } |
| src++; |
| dst++; |
| } |
| |
| #undef UNROLL |
| return; |
| } |
| |
| /* Neon version of S32_Blend_BlitRow32() |
| * portable version is in src/core/SkBlitRow_D32.cpp |
| */ |
| void S32_Blend_BlitRow32_neon(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, |
| int count, U8CPU alpha) { |
| SkASSERT(alpha <= 255); |
| |
| if (count <= 0) { |
| return; |
| } |
| |
| uint16_t src_scale = SkAlpha255To256(alpha); |
| uint16_t dst_scale = 256 - src_scale; |
| |
| while (count >= 2) { |
| uint8x8_t vsrc, vdst, vres; |
| uint16x8_t vsrc_wide, vdst_wide; |
| |
| /* These commented prefetches are a big win for count |
| * values > 64 on an A9 (Pandaboard) but hurt by 10% for count = 4. |
| * They also hurt a little (<5%) on an A15 |
| */ |
| //__builtin_prefetch(src+32); |
| //__builtin_prefetch(dst+32); |
| |
| // Load |
| vsrc = vreinterpret_u8_u32(vld1_u32(src)); |
| vdst = vreinterpret_u8_u32(vld1_u32(dst)); |
| |
| // Process src |
| vsrc_wide = vmovl_u8(vsrc); |
| vsrc_wide = vmulq_u16(vsrc_wide, vdupq_n_u16(src_scale)); |
| |
| // Process dst |
| vdst_wide = vmull_u8(vdst, vdup_n_u8(dst_scale)); |
| |
| // Combine |
| vres = vshrn_n_u16(vdst_wide, 8) + vshrn_n_u16(vsrc_wide, 8); |
| |
| // Store |
| vst1_u32(dst, vreinterpret_u32_u8(vres)); |
| |
| src += 2; |
| dst += 2; |
| count -= 2; |
| } |
| |
| if (count == 1) { |
| uint8x8_t vsrc = vdup_n_u8(0), vdst = vdup_n_u8(0), vres; |
| uint16x8_t vsrc_wide, vdst_wide; |
| |
| // Load |
| vsrc = vreinterpret_u8_u32(vld1_lane_u32(src, vreinterpret_u32_u8(vsrc), 0)); |
| vdst = vreinterpret_u8_u32(vld1_lane_u32(dst, vreinterpret_u32_u8(vdst), 0)); |
| |
| // Process |
| vsrc_wide = vmovl_u8(vsrc); |
| vsrc_wide = vmulq_u16(vsrc_wide, vdupq_n_u16(src_scale)); |
| vdst_wide = vmull_u8(vdst, vdup_n_u8(dst_scale)); |
| vres = vshrn_n_u16(vdst_wide, 8) + vshrn_n_u16(vsrc_wide, 8); |
| |
| // Store |
| vst1_lane_u32(dst, vreinterpret_u32_u8(vres), 0); |
| } |
| } |
| |
| #ifdef SK_CPU_ARM32 |
| void S32A_Blend_BlitRow32_neon(SkPMColor* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, |
| int count, U8CPU alpha) { |
| |
| SkASSERT(255 >= alpha); |
| |
| if (count <= 0) { |
| return; |
| } |
| |
| unsigned alpha256 = SkAlpha255To256(alpha); |
| |
| // First deal with odd counts |
| if (count & 1) { |
| uint8x8_t vsrc = vdup_n_u8(0), vdst = vdup_n_u8(0), vres; |
| uint16x8_t vdst_wide, vsrc_wide; |
| unsigned dst_scale; |
| |
| // Load |
| vsrc = vreinterpret_u8_u32(vld1_lane_u32(src, vreinterpret_u32_u8(vsrc), 0)); |
| vdst = vreinterpret_u8_u32(vld1_lane_u32(dst, vreinterpret_u32_u8(vdst), 0)); |
| |
| // Calc dst_scale |
| dst_scale = vget_lane_u8(vsrc, 3); |
| dst_scale *= alpha256; |
| dst_scale >>= 8; |
| dst_scale = 256 - dst_scale; |
| |
| // Process src |
| vsrc_wide = vmovl_u8(vsrc); |
| vsrc_wide = vmulq_n_u16(vsrc_wide, alpha256); |
| |
| // Process dst |
| vdst_wide = vmovl_u8(vdst); |
| vdst_wide = vmulq_n_u16(vdst_wide, dst_scale); |
| |
| // Combine |
| vres = vshrn_n_u16(vdst_wide, 8) + vshrn_n_u16(vsrc_wide, 8); |
| |
| vst1_lane_u32(dst, vreinterpret_u32_u8(vres), 0); |
| dst++; |
| src++; |
| count--; |
| } |
| |
| if (count) { |
| uint8x8_t alpha_mask; |
| static const uint8_t alpha_mask_setup[] = {3,3,3,3,7,7,7,7}; |
| alpha_mask = vld1_u8(alpha_mask_setup); |
| |
| do { |
| |
| uint8x8_t vsrc, vdst, vres, vsrc_alphas; |
| uint16x8_t vdst_wide, vsrc_wide, vsrc_scale, vdst_scale; |
| |
| __builtin_prefetch(src+32); |
| __builtin_prefetch(dst+32); |
| |
| // Load |
| vsrc = vreinterpret_u8_u32(vld1_u32(src)); |
| vdst = vreinterpret_u8_u32(vld1_u32(dst)); |
| |
| // Prepare src_scale |
| vsrc_scale = vdupq_n_u16(alpha256); |
| |
| // Calc dst_scale |
| vsrc_alphas = vtbl1_u8(vsrc, alpha_mask); |
| vdst_scale = vmovl_u8(vsrc_alphas); |
| vdst_scale *= vsrc_scale; |
| vdst_scale = vshrq_n_u16(vdst_scale, 8); |
| vdst_scale = vsubq_u16(vdupq_n_u16(256), vdst_scale); |
| |
| // Process src |
| vsrc_wide = vmovl_u8(vsrc); |
| vsrc_wide *= vsrc_scale; |
| |
| // Process dst |
| vdst_wide = vmovl_u8(vdst); |
| vdst_wide *= vdst_scale; |
| |
| // Combine |
| vres = vshrn_n_u16(vdst_wide, 8) + vshrn_n_u16(vsrc_wide, 8); |
| |
| vst1_u32(dst, vreinterpret_u32_u8(vres)); |
| |
| src += 2; |
| dst += 2; |
| count -= 2; |
| } while(count); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #undef DEBUG_OPAQUE_DITHER |
| |
| #if defined(DEBUG_OPAQUE_DITHER) |
| static void showme8(char *str, void *p, int len) |
| { |
| static char buf[256]; |
| char tbuf[32]; |
| int i; |
| char *pc = (char*) p; |
| sprintf(buf,"%8s:", str); |
| for(i=0;i<len;i++) { |
| sprintf(tbuf, " %02x", pc[i]); |
| strcat(buf, tbuf); |
| } |
| SkDebugf("%s\n", buf); |
| } |
| static void showme16(char *str, void *p, int len) |
| { |
| static char buf[256]; |
| char tbuf[32]; |
| int i; |
| uint16_t *pc = (uint16_t*) p; |
| sprintf(buf,"%8s:", str); |
| len = (len / sizeof(uint16_t)); /* passed as bytes */ |
| for(i=0;i<len;i++) { |
| sprintf(tbuf, " %04x", pc[i]); |
| strcat(buf, tbuf); |
| } |
| SkDebugf("%s\n", buf); |
| } |
| #endif |
| #endif // #ifdef SK_CPU_ARM32 |
| |
| void S32A_D565_Opaque_Dither_neon (uint16_t * SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, |
| int count, U8CPU alpha, int x, int y) { |
| SkASSERT(255 == alpha); |
| |
| #define UNROLL 8 |
| |
| if (count >= UNROLL) { |
| |
| #if defined(DEBUG_OPAQUE_DITHER) |
| uint16_t tmpbuf[UNROLL]; |
| int td[UNROLL]; |
| int tdv[UNROLL]; |
| int ta[UNROLL]; |
| int tap[UNROLL]; |
| uint16_t in_dst[UNROLL]; |
| int offset = 0; |
| int noisy = 0; |
| #endif |
| |
| uint8x8_t dbase; |
| const uint8_t *dstart = &gDitherMatrix_Neon[(y&3)*12 + (x&3)]; |
| dbase = vld1_u8(dstart); |
| |
| do { |
| uint8x8x4_t vsrc; |
| uint8x8_t sr, sg, sb, sa, d; |
| uint16x8_t dst8, scale8, alpha8; |
| uint16x8_t dst_r, dst_g, dst_b; |
| |
| #if defined(DEBUG_OPAQUE_DITHER) |
| // calculate 8 elements worth into a temp buffer |
| { |
| int my_y = y; |
| int my_x = x; |
| SkPMColor* my_src = (SkPMColor*)src; |
| uint16_t* my_dst = dst; |
| int i; |
| |
| DITHER_565_SCAN(my_y); |
| for(i = 0; i < UNROLL; i++) { |
| SkPMColor c = *my_src++; |
| SkPMColorAssert(c); |
| if (c) { |
| unsigned a = SkGetPackedA32(c); |
| |
| int d = SkAlphaMul(DITHER_VALUE(my_x), SkAlpha255To256(a)); |
| tdv[i] = DITHER_VALUE(my_x); |
| ta[i] = a; |
| tap[i] = SkAlpha255To256(a); |
| td[i] = d; |
| |
| unsigned sr = SkGetPackedR32(c); |
| unsigned sg = SkGetPackedG32(c); |
| unsigned sb = SkGetPackedB32(c); |
| sr = SkDITHER_R32_FOR_565(sr, d); |
| sg = SkDITHER_G32_FOR_565(sg, d); |
| sb = SkDITHER_B32_FOR_565(sb, d); |
| |
| uint32_t src_expanded = (sg << 24) | (sr << 13) | (sb << 2); |
| uint32_t dst_expanded = SkExpand_rgb_16(*my_dst); |
| dst_expanded = dst_expanded * (SkAlpha255To256(255 - a) >> 3); |
| // now src and dst expanded are in g:11 r:10 x:1 b:10 |
| tmpbuf[i] = SkCompact_rgb_16((src_expanded + dst_expanded) >> 5); |
| td[i] = d; |
| } else { |
| tmpbuf[i] = *my_dst; |
| ta[i] = tdv[i] = td[i] = 0xbeef; |
| } |
| in_dst[i] = *my_dst; |
| my_dst += 1; |
| DITHER_INC_X(my_x); |
| } |
| } |
| #endif |
| |
| #ifdef SK_CPU_ARM64 |
| vsrc = sk_vld4_u8_arm64_4(src); |
| #else |
| { |
| register uint8x8_t d0 asm("d0"); |
| register uint8x8_t d1 asm("d1"); |
| register uint8x8_t d2 asm("d2"); |
| register uint8x8_t d3 asm("d3"); |
| |
| asm ("vld4.8 {d0-d3},[%[src]]! " |
| : "=w" (d0), "=w" (d1), "=w" (d2), "=w" (d3), [src] "+r" (src) |
| : |
| ); |
| vsrc.val[0] = d0; |
| vsrc.val[1] = d1; |
| vsrc.val[2] = d2; |
| vsrc.val[3] = d3; |
| } |
| #endif |
| sa = vsrc.val[NEON_A]; |
| sr = vsrc.val[NEON_R]; |
| sg = vsrc.val[NEON_G]; |
| sb = vsrc.val[NEON_B]; |
| |
| /* calculate 'd', which will be 0..7 |
| * dbase[] is 0..7; alpha is 0..256; 16 bits suffice |
| */ |
| alpha8 = vmovl_u8(dbase); |
| alpha8 = vmlal_u8(alpha8, sa, dbase); |
| d = vshrn_n_u16(alpha8, 8); // narrowing too |
| |
| // sr = sr - (sr>>5) + d |
| /* watching for 8-bit overflow. d is 0..7; risky range of |
| * sr is >248; and then (sr>>5) is 7 so it offsets 'd'; |
| * safe as long as we do ((sr-sr>>5) + d) |
| */ |
| sr = vsub_u8(sr, vshr_n_u8(sr, 5)); |
| sr = vadd_u8(sr, d); |
| |
| // sb = sb - (sb>>5) + d |
| sb = vsub_u8(sb, vshr_n_u8(sb, 5)); |
| sb = vadd_u8(sb, d); |
| |
| // sg = sg - (sg>>6) + d>>1; similar logic for overflows |
| sg = vsub_u8(sg, vshr_n_u8(sg, 6)); |
| sg = vadd_u8(sg, vshr_n_u8(d,1)); |
| |
| // need to pick up 8 dst's -- at 16 bits each, 128 bits |
| dst8 = vld1q_u16(dst); |
| dst_b = vandq_u16(dst8, vdupq_n_u16(SK_B16_MASK)); |
| dst_g = vshrq_n_u16(vshlq_n_u16(dst8, SK_R16_BITS), SK_R16_BITS + SK_B16_BITS); |
| dst_r = vshrq_n_u16(dst8, SK_R16_SHIFT); // clearing hi bits |
| |
| // blend |
| scale8 = vsubw_u8(vdupq_n_u16(256), sa); |
| |
| // combine the addq and mul, save 3 insns |
| scale8 = vshrq_n_u16(scale8, 3); |
| dst_b = vmlaq_u16(vshll_n_u8(sb,2), dst_b, scale8); |
| dst_g = vmlaq_u16(vshll_n_u8(sg,3), dst_g, scale8); |
| dst_r = vmlaq_u16(vshll_n_u8(sr,2), dst_r, scale8); |
| |
| // repack to store |
| dst8 = vshrq_n_u16(dst_b, 5); |
| dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dst_g, 5), 5); |
| dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dst_r,5), 11); |
| |
| vst1q_u16(dst, dst8); |
| |
| #if defined(DEBUG_OPAQUE_DITHER) |
| // verify my 8 elements match the temp buffer |
| { |
| int i, bad=0; |
| static int invocation; |
| |
| for (i = 0; i < UNROLL; i++) { |
| if (tmpbuf[i] != dst[i]) { |
| bad=1; |
| } |
| } |
| if (bad) { |
| SkDebugf("BAD S32A_D565_Opaque_Dither_neon(); invocation %d offset %d\n", |
| invocation, offset); |
| SkDebugf(" alpha 0x%x\n", alpha); |
| for (i = 0; i < UNROLL; i++) |
| SkDebugf("%2d: %s %04x w %04x id %04x s %08x d %04x %04x %04x %04x\n", |
| i, ((tmpbuf[i] != dst[i])?"BAD":"got"), dst[i], tmpbuf[i], |
| in_dst[i], src[i-8], td[i], tdv[i], tap[i], ta[i]); |
| |
| showme16("alpha8", &alpha8, sizeof(alpha8)); |
| showme16("scale8", &scale8, sizeof(scale8)); |
| showme8("d", &d, sizeof(d)); |
| showme16("dst8", &dst8, sizeof(dst8)); |
| showme16("dst_b", &dst_b, sizeof(dst_b)); |
| showme16("dst_g", &dst_g, sizeof(dst_g)); |
| showme16("dst_r", &dst_r, sizeof(dst_r)); |
| showme8("sb", &sb, sizeof(sb)); |
| showme8("sg", &sg, sizeof(sg)); |
| showme8("sr", &sr, sizeof(sr)); |
| |
| return; |
| } |
| offset += UNROLL; |
| invocation++; |
| } |
| #endif |
| dst += UNROLL; |
| count -= UNROLL; |
| // skip x += UNROLL, since it's unchanged mod-4 |
| } while (count >= UNROLL); |
| } |
| #undef UNROLL |
| |
| // residuals |
| if (count > 0) { |
| DITHER_565_SCAN(y); |
| do { |
| SkPMColor c = *src++; |
| SkPMColorAssert(c); |
| if (c) { |
| unsigned a = SkGetPackedA32(c); |
| |
| // dither and alpha are just temporary variables to work-around |
| // an ICE in debug. |
| unsigned dither = DITHER_VALUE(x); |
| unsigned alpha = SkAlpha255To256(a); |
| int d = SkAlphaMul(dither, alpha); |
| |
| unsigned sr = SkGetPackedR32(c); |
| unsigned sg = SkGetPackedG32(c); |
| unsigned sb = SkGetPackedB32(c); |
| sr = SkDITHER_R32_FOR_565(sr, d); |
| sg = SkDITHER_G32_FOR_565(sg, d); |
| sb = SkDITHER_B32_FOR_565(sb, d); |
| |
| uint32_t src_expanded = (sg << 24) | (sr << 13) | (sb << 2); |
| uint32_t dst_expanded = SkExpand_rgb_16(*dst); |
| dst_expanded = dst_expanded * (SkAlpha255To256(255 - a) >> 3); |
| // now src and dst expanded are in g:11 r:10 x:1 b:10 |
| *dst = SkCompact_rgb_16((src_expanded + dst_expanded) >> 5); |
| } |
| dst += 1; |
| DITHER_INC_X(x); |
| } while (--count != 0); |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| #undef DEBUG_S32_OPAQUE_DITHER |
| |
| void S32_D565_Opaque_Dither_neon(uint16_t* SK_RESTRICT dst, |
| const SkPMColor* SK_RESTRICT src, |
| int count, U8CPU alpha, int x, int y) { |
| SkASSERT(255 == alpha); |
| |
| #define UNROLL 8 |
| if (count >= UNROLL) { |
| uint8x8_t d; |
| const uint8_t *dstart = &gDitherMatrix_Neon[(y&3)*12 + (x&3)]; |
| d = vld1_u8(dstart); |
| |
| while (count >= UNROLL) { |
| uint8x8_t sr, sg, sb; |
| uint16x8_t dr, dg, db; |
| uint16x8_t dst8; |
| uint8x8x4_t vsrc; |
| |
| #ifdef SK_CPU_ARM64 |
| vsrc = sk_vld4_u8_arm64_3(src); |
| #else |
| { |
| register uint8x8_t d0 asm("d0"); |
| register uint8x8_t d1 asm("d1"); |
| register uint8x8_t d2 asm("d2"); |
| register uint8x8_t d3 asm("d3"); |
| |
| asm ( |
| "vld4.8 {d0-d3},[%[src]]! " |
| : "=w" (d0), "=w" (d1), "=w" (d2), "=w" (d3), [src] "+&r" (src) |
| : |
| ); |
| vsrc.val[0] = d0; |
| vsrc.val[1] = d1; |
| vsrc.val[2] = d2; |
| } |
| #endif |
| sr = vsrc.val[NEON_R]; |
| sg = vsrc.val[NEON_G]; |
| sb = vsrc.val[NEON_B]; |
| |
| /* XXX: if we want to prefetch, hide it in the above asm() |
| * using the gcc __builtin_prefetch(), the prefetch will |
| * fall to the bottom of the loop -- it won't stick up |
| * at the top of the loop, just after the vld4. |
| */ |
| |
| // sr = sr - (sr>>5) + d |
| sr = vsub_u8(sr, vshr_n_u8(sr, 5)); |
| dr = vaddl_u8(sr, d); |
| |
| // sb = sb - (sb>>5) + d |
| sb = vsub_u8(sb, vshr_n_u8(sb, 5)); |
| db = vaddl_u8(sb, d); |
| |
| // sg = sg - (sg>>6) + d>>1; similar logic for overflows |
| sg = vsub_u8(sg, vshr_n_u8(sg, 6)); |
| dg = vaddl_u8(sg, vshr_n_u8(d, 1)); |
| |
| // pack high bits of each into 565 format (rgb, b is lsb) |
| dst8 = vshrq_n_u16(db, 3); |
| dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dg, 2), 5); |
| dst8 = vsliq_n_u16(dst8, vshrq_n_u16(dr, 3), 11); |
| |
| // store it |
| vst1q_u16(dst, dst8); |
| |
| #if defined(DEBUG_S32_OPAQUE_DITHER) |
| // always good to know if we generated good results |
| { |
| int i, myx = x, myy = y; |
| DITHER_565_SCAN(myy); |
| for (i=0;i<UNROLL;i++) { |
| // the '!' in the asm block above post-incremented src by the 8 pixels it reads. |
| SkPMColor c = src[i-8]; |
| unsigned dither = DITHER_VALUE(myx); |
| uint16_t val = SkDitherRGB32To565(c, dither); |
| if (val != dst[i]) { |
| SkDebugf("RBE: src %08x dither %02x, want %04x got %04x dbas[i] %02x\n", |
| c, dither, val, dst[i], dstart[i]); |
| } |
| DITHER_INC_X(myx); |
| } |
| } |
| #endif |
| |
| dst += UNROLL; |
| // we don't need to increment src as the asm above has already done it |
| count -= UNROLL; |
| x += UNROLL; // probably superfluous |
| } |
| } |
| #undef UNROLL |
| |
| // residuals |
| if (count > 0) { |
| DITHER_565_SCAN(y); |
| do { |
| SkPMColor c = *src++; |
| SkPMColorAssert(c); |
| SkASSERT(SkGetPackedA32(c) == 255); |
| |
| unsigned dither = DITHER_VALUE(x); |
| *dst++ = SkDitherRGB32To565(c, dither); |
| DITHER_INC_X(x); |
| } while (--count != 0); |
| } |
| } |
| |
| void Color32_arm_neon(SkPMColor* dst, const SkPMColor* src, int count, |
| SkPMColor color) { |
| if (count <= 0) { |
| return; |
| } |
| |
| if (0 == color) { |
| if (src != dst) { |
| memcpy(dst, src, count * sizeof(SkPMColor)); |
| } |
| return; |
| } |
| |
| unsigned colorA = SkGetPackedA32(color); |
| if (255 == colorA) { |
| sk_memset32(dst, color, count); |
| return; |
| } |
| |
| unsigned scale = 256 - SkAlpha255To256(colorA); |
| |
| if (count >= 8) { |
| uint32x4_t vcolor; |
| uint8x8_t vscale; |
| |
| vcolor = vdupq_n_u32(color); |
| |
| // scale numerical interval [0-255], so load as 8 bits |
| vscale = vdup_n_u8(scale); |
| |
| do { |
| // load src color, 8 pixels, 4 64 bit registers |
| // (and increment src). |
| uint32x2x4_t vsrc; |
| #if defined(SK_CPU_ARM32) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 6))) |
| asm ( |
| "vld1.32 %h[vsrc], [%[src]]!" |
| : [vsrc] "=w" (vsrc), [src] "+r" (src) |
| : : |
| ); |
| #else // 64bit targets and Clang |
| vsrc.val[0] = vld1_u32(src); |
| vsrc.val[1] = vld1_u32(src+2); |
| vsrc.val[2] = vld1_u32(src+4); |
| vsrc.val[3] = vld1_u32(src+6); |
| src += 8; |
| #endif |
| |
| // multiply long by scale, 64 bits at a time, |
| // destination into a 128 bit register. |
| uint16x8x4_t vtmp; |
| vtmp.val[0] = vmull_u8(vreinterpret_u8_u32(vsrc.val[0]), vscale); |
| vtmp.val[1] = vmull_u8(vreinterpret_u8_u32(vsrc.val[1]), vscale); |
| vtmp.val[2] = vmull_u8(vreinterpret_u8_u32(vsrc.val[2]), vscale); |
| vtmp.val[3] = vmull_u8(vreinterpret_u8_u32(vsrc.val[3]), vscale); |
| |
| // shift the 128 bit registers, containing the 16 |
| // bit scaled values back to 8 bits, narrowing the |
| // results to 64 bit registers. |
| uint8x16x2_t vres; |
| vres.val[0] = vcombine_u8( |
| vshrn_n_u16(vtmp.val[0], 8), |
| vshrn_n_u16(vtmp.val[1], 8)); |
| vres.val[1] = vcombine_u8( |
| vshrn_n_u16(vtmp.val[2], 8), |
| vshrn_n_u16(vtmp.val[3], 8)); |
| |
| // adding back the color, using 128 bit registers. |
| uint32x4x2_t vdst; |
| vdst.val[0] = vreinterpretq_u32_u8(vres.val[0] + |
| vreinterpretq_u8_u32(vcolor)); |
| vdst.val[1] = vreinterpretq_u32_u8(vres.val[1] + |
| vreinterpretq_u8_u32(vcolor)); |
| |
| // store back the 8 calculated pixels (2 128 bit |
| // registers), and increment dst. |
| #if defined(SK_CPU_ARM32) && ((__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 6))) |
| asm ( |
| "vst1.32 %h[vdst], [%[dst]]!" |
| : [dst] "+r" (dst) |
| : [vdst] "w" (vdst) |
| : "memory" |
| ); |
| #else // 64bit targets and Clang |
| vst1q_u32(dst, vdst.val[0]); |
| vst1q_u32(dst+4, vdst.val[1]); |
| dst += 8; |
| #endif |
| count -= 8; |
| |
| } while (count >= 8); |
| } |
| |
| while (count > 0) { |
| *dst = color + SkAlphaMulQ(*src, scale); |
| src += 1; |
| dst += 1; |
| count--; |
| } |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////// |
| |
| const SkBlitRow::Proc sk_blitrow_platform_565_procs_arm_neon[] = { |
| // no dither |
| S32_D565_Opaque_neon, |
| S32_D565_Blend_neon, |
| #ifdef SK_CPU_ARM32 |
| S32A_D565_Opaque_neon, |
| #else |
| NULL, |
| #endif |
| S32A_D565_Blend_neon, |
| |
| // dither |
| S32_D565_Opaque_Dither_neon, |
| S32_D565_Blend_Dither_neon, |
| S32A_D565_Opaque_Dither_neon, |
| NULL, // S32A_D565_Blend_Dither |
| }; |
| |
| const SkBlitRow::Proc32 sk_blitrow_platform_32_procs_arm_neon[] = { |
| NULL, // S32_Opaque, |
| S32_Blend_BlitRow32_neon, // S32_Blend, |
| /* |
| * We have two choices for S32A_Opaque procs. The one reads the src alpha |
| * value and attempts to optimize accordingly. The optimization is |
| * sensitive to the source content and is not a win in all cases. For |
| * example, if there are a lot of transitions between the alpha states, |
| * the performance will almost certainly be worse. However, for many |
| * common cases the performance is equivalent or better than the standard |
| * case where we do not inspect the src alpha. |
| */ |
| #if SK_A32_SHIFT == 24 |
| // This proc assumes the alpha value occupies bits 24-32 of each SkPMColor |
| S32A_Opaque_BlitRow32_neon_src_alpha, // S32A_Opaque, |
| #else |
| S32A_Opaque_BlitRow32_neon, // S32A_Opaque, |
| #endif |
| #ifdef SK_CPU_ARM32 |
| S32A_Blend_BlitRow32_neon // S32A_Blend |
| #else |
| NULL |
| #endif |
| }; |
