wehub-resource-sync
55 lines
794 B
ArmAsm
55 lines
794 B
ArmAsm
//
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// MNNRGBToBGR565Fast.S
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//
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// Created by MNN on 2024/08/28.
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// Copyright © 2018, Alibaba Group Holding Limited
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//
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#ifdef __arm__
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#ifndef __aarch64__
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#include "MNNAsmGlobal.h"
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.text
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.align 5
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asm_function MNNRGBToBGR565Fast
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// void MNNRGBToBGR565Fast(const unsigned char* source, unsigned char* dest, size_t count);
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// Auto Load: r0: source, r1: dest, r2: count
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// b*7
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// g*38
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// r*19
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push {lr}
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vmov.s8 q15, #8
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vneg.s8 q15, q15
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vmov.s8 q14, #4
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vneg.s8 q14, q14
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L1:
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vld3.8 {d0, d1, d2}, [r0]! // r,g,b
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vand.u8 d0, d0, d30 // r & ~7
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vand.u8 d1, d1, d28 // g & ~3
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vshr.u8 d2, d2, #3 // b >> 3
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vshll.u8 q2, d0, #7
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vshl.u8 q2, q2, #1
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vshll.u8 q3, d1, #3
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vmovl.u8 q8, d2
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vorr.u8 q2, q2, q3
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vorr.u8 q2, q2, q8
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vst1.16 {q2}, [r1]!
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subs r2, r2, #1
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bne L1
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End:
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pop {pc}
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#endif
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#endif
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