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- #include "libyuv/basic_types.h"
- #include "libyuv/compare_row.h"
- #include "libyuv/row.h"
- #ifdef __cplusplus
- namespace libyuv {
- extern "C" {
- #endif
- #if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) && \
- !defined(__aarch64__)
- uint32_t HammingDistance_NEON(const uint8_t* src_a,
- const uint8_t* src_b,
- int count) {
- uint32_t diff;
- asm volatile(
- "vmov.u16 q4, #0 \n"
- "1: \n"
- "vld1.8 {q0, q1}, [%0]! \n"
- "vld1.8 {q2, q3}, [%1]! \n"
- "veor.32 q0, q0, q2 \n"
- "veor.32 q1, q1, q3 \n"
- "vcnt.i8 q0, q0 \n"
- "vcnt.i8 q1, q1 \n"
- "subs %2, %2, #32 \n"
- "vadd.u8 q0, q0, q1 \n"
- "vpadal.u8 q4, q0 \n"
- "bgt 1b \n"
- "vpaddl.u16 q0, q4 \n"
- "vpadd.u32 d0, d0, d1 \n"
- "vpadd.u32 d0, d0, d0 \n"
- "vmov.32 %3, d0[0] \n"
- : "+r"(src_a), "+r"(src_b), "+r"(count), "=r"(diff)
- :
- : "cc", "q0", "q1", "q2", "q3", "q4");
- return diff;
- }
- uint32_t SumSquareError_NEON(const uint8_t* src_a,
- const uint8_t* src_b,
- int count) {
- uint32_t sse;
- asm volatile(
- "vmov.u8 q8, #0 \n"
- "vmov.u8 q10, #0 \n"
- "vmov.u8 q9, #0 \n"
- "vmov.u8 q11, #0 \n"
- "1: \n"
- "vld1.8 {q0}, [%0]! \n"
- "vld1.8 {q1}, [%1]! \n"
- "subs %2, %2, #16 \n"
- "vsubl.u8 q2, d0, d2 \n"
- "vsubl.u8 q3, d1, d3 \n"
- "vmlal.s16 q8, d4, d4 \n"
- "vmlal.s16 q9, d6, d6 \n"
- "vmlal.s16 q10, d5, d5 \n"
- "vmlal.s16 q11, d7, d7 \n"
- "bgt 1b \n"
- "vadd.u32 q8, q8, q9 \n"
- "vadd.u32 q10, q10, q11 \n"
- "vadd.u32 q11, q8, q10 \n"
- "vpaddl.u32 q1, q11 \n"
- "vadd.u64 d0, d2, d3 \n"
- "vmov.32 %3, d0[0] \n"
- : "+r"(src_a), "+r"(src_b), "+r"(count), "=r"(sse)
- :
- : "memory", "cc", "q0", "q1", "q2", "q3", "q8", "q9", "q10", "q11");
- return sse;
- }
- #endif
- #ifdef __cplusplus
- }
- }
- #endif
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