diff options
Diffstat (limited to 'files/source/compare_neon.cc')
| -rw-r--r-- | files/source/compare_neon.cc | 94 |
1 files changed, 62 insertions, 32 deletions
diff --git a/files/source/compare_neon.cc b/files/source/compare_neon.cc index 49aa3b4e..2a2181e0 100644 --- a/files/source/compare_neon.cc +++ b/files/source/compare_neon.cc @@ -21,40 +21,70 @@ extern "C" { #if !defined(LIBYUV_DISABLE_NEON) && defined(__ARM_NEON__) && \ !defined(__aarch64__) -uint32 SumSquareError_NEON(const uint8* src_a, const uint8* src_b, int count) { - volatile uint32 sse; - asm volatile ( - "vmov.u8 q8, #0 \n" - "vmov.u8 q10, #0 \n" - "vmov.u8 q9, #0 \n" - "vmov.u8 q11, #0 \n" +// 256 bits at a time +// uses short accumulator which restricts count to 131 KB +uint32_t HammingDistance_NEON(const uint8_t* src_a, + const uint8_t* src_b, + int count) { + uint32_t diff; - "1: \n" - MEMACCESS(0) - "vld1.8 {q0}, [%0]! \n" - MEMACCESS(1) - "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" + asm volatile( + "vmov.u16 q4, #0 \n" // accumulator - "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"); + "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" // 16 byte counts + "vpadal.u8 q4, q0 \n" // 8 shorts + "bgt 1b \n" + + "vpaddl.u16 q0, q4 \n" // 4 ints + "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; } |