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#include<stdio.h>
#include<stddef.h>
#include<stdint.h>
#include<arm_neon.h>
#define SK_B16_BITS 5
#define SK_G16_BITS 6
#define SK_R16_BITS 5
#define SK_R16_SHIFT (SK_B16_BITS + SK_G16_BITS)
#define SK_G16_SHIFT (SK_B16_BITS)
#define SK_G16_MASK ((1 << SK_G16_BITS) - 1)
#define SK_B16_MASK ((1 << SK_B16_BITS) - 1)
#define SK_G16_MASK_IN_PLACE (SK_G16_MASK << SK_G16_SHIFT)
static inline uint32_t SkExpand_rgb_16(unsigned c) {
return ((c & SK_G16_MASK_IN_PLACE) << 16) | (c & ~SK_G16_MASK_IN_PLACE);
}
static inline unsigned SkCompact_rgb_16(uint32_t c) {
return ((c >> 16) & SK_G16_MASK_IN_PLACE) | (c & ~SK_G16_MASK_IN_PLACE);
}
void SkRGB16_Opaque_Blitter_blitV_c(uint16_t* device, size_t deviceRB, int height, uint8_t alpha) {
unsigned scale5 = alpha >> 3;
uint32_t src32 = 256 * scale5;
scale5 = 32 - scale5;
do {
uint32_t dst32 = SkExpand_rgb_16(*device) * scale5;
*device = SkCompact_rgb_16((src32 + dst32) >> 5);
device = (uint16_t*)((char*)device + deviceRB);
} while (--height != 0);
}
#define LOAD_LANE_16(reg, n) \
reg = vld1q_lane_u16(device, reg, n); \
device = (uint16_t*)((char*)device + deviceRB);
#define STORE_LANE_16(reg, n) \
vst1_lane_u16(dst, reg, n); \
dst = (uint16_t*)((char*)dst + deviceRB);
void SkRGB16_Opaque_Blitter_blitV_neon(uint16_t* device, size_t deviceRB, int height, uint8_t alpha)
{
unsigned scale = alpha >> 3;
uint32_t src32 = 256 * scale;
scale = 32 - scale;
if (height >= 8)
{
uint16_t* dst = device;
// prepare constants
uint16x8_t vdev = vdupq_n_u16(0);
uint16x8_t vmaskq_g16 = vdupq_n_u16(SK_G16_MASK_IN_PLACE);
uint16x8_t vmaskq_ng16 = vdupq_n_u16(~SK_G16_MASK_IN_PLACE);
uint32x4_t vsrc32 = vdupq_n_u32(src32);
uint32x4_t vscale5 = vdupq_n_u32((uint32_t)scale);
while (height >= 8){
LOAD_LANE_16(vdev, 0)
LOAD_LANE_16(vdev, 1)
LOAD_LANE_16(vdev, 2)
LOAD_LANE_16(vdev, 3)
LOAD_LANE_16(vdev, 4)
LOAD_LANE_16(vdev, 5)
LOAD_LANE_16(vdev, 6)
LOAD_LANE_16(vdev, 7)
// Expand_rgb_16
uint16x8x2_t vdst = vzipq_u16((vdev & vmaskq_ng16), (vdev & vmaskq_g16));
uint32x4_t vdst32_lo = vmulq_u32(vreinterpretq_u32_u16(vdst.val[0]), vscale5);
uint32x4_t vdst32_hi = vmulq_u32(vreinterpretq_u32_u16(vdst.val[1]), vscale5);
// Compact_rgb_16
vdst32_lo = vaddq_u32(vdst32_lo, vsrc32);
vdst32_hi = vaddq_u32(vdst32_hi, vsrc32);
vdst32_lo = vshrq_n_u32(vdst32_lo, 5);
vdst32_hi = vshrq_n_u32(vdst32_hi, 5);
uint16x4_t vtmp_lo = vmovn_u32(vdst32_lo) & vget_low_u16(vmaskq_ng16);
uint16x4_t vtmp_hi = vshrn_n_u32(vdst32_lo, 16) & vget_low_u16(vmaskq_g16);
uint16x4_t vdst16_lo = vorr_u16(vtmp_lo, vtmp_hi);
vtmp_lo = vmovn_u32(vdst32_hi) & vget_low_u16(vmaskq_ng16);
vtmp_hi = vshrn_n_u32(vdst32_hi, 16) & vget_low_u16(vmaskq_g16);
uint16x4_t vdst16_hi = vorr_u16(vtmp_lo, vtmp_hi);
STORE_LANE_16(vdst16_lo, 0)
STORE_LANE_16(vdst16_lo, 1)
STORE_LANE_16(vdst16_lo, 2)
STORE_LANE_16(vdst16_lo, 3)
STORE_LANE_16(vdst16_hi, 0)
STORE_LANE_16(vdst16_hi, 1)
STORE_LANE_16(vdst16_hi, 2)
STORE_LANE_16(vdst16_hi, 3)
height -= 8;
}
}
while (height != 0){
uint32_t dst32 = SkExpand_rgb_16(*device) * scale;
*device = SkCompact_rgb_16((src32 + dst32) >> 5);
device = (uint16_t*)((char*)device + deviceRB);
height--;
}
}
#undef LOAD_LANE_16
#undef STORE_LANE_16
void SkRGB16_Opaque_Blitter_blitH_c(uint16_t* device, int height, uint8_t alpha) {
unsigned scale5 = alpha >> 3;
uint32_t src32 = 256 * scale5;
scale5 = 32 - scale5;
do {
uint32_t dst32 = SkExpand_rgb_16(*device) * scale5;
*device++ = SkCompact_rgb_16((src32 + dst32) >> 5);
} while (--height != 0);
}
void SkRGB16_Opaque_Blitter_blitH_neon(uint16_t* device, int height, uint8_t alpha)
{
unsigned scale = alpha >> 3;
uint32_t src32 = 256 * scale;
scale = 32 - scale;
if (height >= 8)
{
uint16_t* dst = device;
// prepare constants
uint16x8_t vdev = vdupq_n_u16(0);
uint16x8_t vmaskq_g16 = vdupq_n_u16(SK_G16_MASK_IN_PLACE);
uint16x8_t vmaskq_ng16 = vdupq_n_u16(~SK_G16_MASK_IN_PLACE);
uint32x4_t vsrc32 = vdupq_n_u32(src32);
uint32x4_t vscale5 = vdupq_n_u32((uint32_t)scale);
while (height >= 8){
vdev = vld1q_u16(device);
// Expand_rgb_16
uint16x8x2_t vdst = vzipq_u16((vdev & vmaskq_ng16), (vdev & vmaskq_g16));
uint32x4_t vdst32_lo = vmulq_u32(vreinterpretq_u32_u16(vdst.val[0]), vscale5);
uint32x4_t vdst32_hi = vmulq_u32(vreinterpretq_u32_u16(vdst.val[1]), vscale5);
// Compact_rgb_16
vdst32_lo = vaddq_u32(vdst32_lo, vsrc32);
vdst32_hi = vaddq_u32(vdst32_hi, vsrc32);
vdst32_lo = vshrq_n_u32(vdst32_lo, 5);
vdst32_hi = vshrq_n_u32(vdst32_hi, 5);
uint16x4_t vtmp_lo = vmovn_u32(vdst32_lo) & vget_low_u16(vmaskq_ng16);
uint16x4_t vtmp_hi = vshrn_n_u32(vdst32_lo, 16) & vget_low_u16(vmaskq_g16);
uint16x4_t vdst16_lo = vorr_u16(vtmp_lo, vtmp_hi);
vtmp_lo = vmovn_u32(vdst32_hi) & vget_low_u16(vmaskq_ng16);
vtmp_hi = vshrn_n_u32(vdst32_hi, 16) & vget_low_u16(vmaskq_g16);
uint16x4_t vdst16_hi = vorr_u16(vtmp_lo, vtmp_hi);
vst1q_u16(device, vcombine_u16(vdst16_lo, vdst16_hi));
device += 8;
height -= 8;
}
}
while (height != 0){
uint32_t dst32 = SkExpand_rgb_16(*device) * scale;
*device++ = SkCompact_rgb_16((src32 + dst32) >> 5);
height--;
}
}
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