wehub-resource-sync
82 lines
1.3 KiB
ArmAsm
82 lines
1.3 KiB
ArmAsm
//
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// MNNVectorTop1Float.S
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// MNN
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//
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// Created by MNN on 2020/12/09.
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// Copyright © 2018, Alibaba Group Holding Limited
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//
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#ifdef __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 MNNVectorTop1Float
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// void MNNVectorTop1Float(float* input, float* maxValue, int32_t* maxIndex, size_t inputCountUnit);
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// Auto: x0: input, x1: maxValue, x2: maxIndex, x3: inputCountUnit
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// v30 maxValue
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ld1 {v30.4s}, [x0]
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// v29 maxIndex
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mov w11, #0
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mov v29.s[0], w11
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mov w11, #1
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mov v29.s[1], w11
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mov w11, #2
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mov v29.s[2], w11
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mov w11, #3
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mov v29.s[3], w11
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// v28 current index
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mov v28.16b, v29.16b
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// v27, all 4, increment
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mov w11, #4
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mov v27.s[0], w11
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mov v27.s[1], w11
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mov v27.s[2], w11
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mov v27.s[3], w11
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cmp x3, #0
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beq End
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Loop:
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ld1 {v26.4s}, [x0], #16
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fcmgt v25.4s, v26.4s, v30.4s
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bit v30.16b, v26.16b, v25.16b
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bit v29.16b, v28.16b, v25.16b
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add v28.4s, v28.4s, v27.4s
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subs x3, x3, #1
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bne Loop
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// reduce result to single value and index
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mov v20.d[0], v30.d[1]
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mov v21.d[0], v29.d[1]
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fcmgt v25.2s, v20.2s, v30.2s
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bit v30.8b, v20.8b, v25.8b
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bit v29.8b, v21.8b, v25.8b
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mov v20.s[0], v30.s[1]
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mov v21.s[0], v29.s[1]
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fcmgt v25.2s, v20.2s, v30.2s
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bit v30.8b, v20.8b, v25.8b
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bit v29.8b, v21.8b, v25.8b
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End:
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st1 {v30.s}[0], [x1]
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st1 {v29.s}[0], [x2]
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ret
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#endif
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