wehub-resource-sync
93 lines
1.8 KiB
ArmAsm
93 lines
1.8 KiB
ArmAsm
#ifdef __aarch64__
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#include "MNNAsmGlobal.h"
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.text
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.align 5
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// void MNNRGBToGRAYFast(const unsigned char* source, unsigned char* dest, size_t count);
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asm_function MNNRGBToGRAYFast
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// x0: source, x1: dest, x2: count
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stp d14, d15, [sp, #(-16 * 4)]!
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stp d12, d13, [sp, #(16 * 1)]
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stp d10, d11, [sp, #(16 * 2)]
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stp d8, d9, [sp, #(16 * 3)]
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movi v29.16b, #19
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movi v30.16b, #38
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movi v31.16b, #7
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L4:
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cmp x2, #4
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blt L2
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sub x2, x2, #4
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ld3 {v0.16b, v1.16b, v2.16b}, [x0], #48
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ld3 {v14.16b, v15.16b, v16.16b}, [x0], #48
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umull v4.8h, v0.8b, v29.8b // b*7
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umlal v4.8h, v1.8b, v30.8b // g*38
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umlal v4.8h, v2.8b, v31.8b // r*19
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umull2 v7.8h, v0.16b, v29.16b // b*7
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umlal2 v7.8h, v1.16b, v30.16b // g*38
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umlal2 v7.8h, v2.16b, v31.16b // r*19
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umull v18.8h, v14.8b, v29.8b // b*7
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umlal v18.8h, v15.8b, v30.8b // g*38
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umlal v18.8h, v16.8b, v31.8b // r*19
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umull2 v21.8h, v14.16b, v29.16b // b*7
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umlal2 v21.8h, v15.16b, v30.16b // g*38
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umlal2 v21.8h, v16.16b, v31.16b // r*19
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uqshrn v4.8b, v4.8h, #6
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uqshrn2 v4.16b, v7.8h, #6
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uqshrn v5.8b, v18.8h, #6
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uqshrn2 v5.16b, v21.8h, #6
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st1 {v4.16b, v5.16b}, [x1], #32
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b L4
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L2:
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cmp x2, #2
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blt L1
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sub x2, x2, #2
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ld3 {v0.16b, v1.16b, v2.16b}, [x0], #48
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umull v4.8h, v0.8b, v29.8b // b*7
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umlal v4.8h, v1.8b, v30.8b // g*38
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umlal v4.8h, v2.8b, v31.8b // r*19
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umull2 v7.8h, v0.16b, v29.16b // b*7
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umlal2 v7.8h, v1.16b, v30.16b // g*38
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umlal2 v7.8h, v2.16b, v31.16b // r*19
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uqshrn v4.8b, v4.8h, #6
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uqshrn2 v4.16b, v7.8h, #6
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st1 {v4.16b}, [x1], #16
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b L2
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L1:
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cmp x2, #1
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blt End
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ld3 {v0.8b, v1.8b, v2.8b}, [x0], #24
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umull v4.8h, v0.8b, v29.8b // b*7
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umlal v4.8h, v1.8b, v30.8b // g*38
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umlal v4.8h, v2.8b, v31.8b // r*19
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uqshrn v10.8b, v4.8h, #6
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st1 {v10.8b}, [x1], #8
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End:
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ldp d8, d9, [sp, #(16 * 3)]
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ldp d10, d11, [sp, #(16 * 2)]
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ldp d12, d13, [sp, #(16 * 1)]
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ldp d14, d15, [sp], #(16 * 4)
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ret
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#endif
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