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arm wasm: add vst4_u8 translation to Wasm SIMD #1209

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Sep 10, 2024
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arm wasm: add vst4_u8 translation to Wasm SIMD #1209

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23 changes: 22 additions & 1 deletion simde/arm/neon/st4.h
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,7 @@
#if !defined(SIMDE_ARM_NEON_ST4_H)
#define SIMDE_ARM_NEON_ST4_H

#include "types.h"
#include "combine.h"

HEDLEY_DIAGNOSTIC_PUSH
SIMDE_DISABLE_UNWANTED_DIAGNOSTICS
Expand Down Expand Up @@ -246,6 +246,27 @@ void
simde_vst4_u8(uint8_t *ptr, simde_uint8x8x4_t val) {
#if defined(SIMDE_ARM_NEON_A32V7_NATIVE)
vst4_u8(ptr, val);
#elif defined(SIMDE_WASM_SIMD128_NATIVE)
simde_uint16x8_private r0_, r1_;
simde_uint8x16_private ab_ = simde_uint8x16_to_private(simde_vcombine_u8(val.val[0], val.val[1]));
simde_uint8x16_private cd_ = simde_uint8x16_to_private(simde_vcombine_u8(val.val[2], val.val[3]));

// Perform the interleaving
r0_.v128 = wasm_i8x16_shuffle(ab_.v128, cd_.v128,
0, 8, 16, 24,
1, 9, 17, 25,
2, 10, 18, 26,
3, 11, 19, 27
);
r1_.v128 = wasm_i8x16_shuffle(ab_.v128, cd_.v128,
4, 12, 20, 28,
5, 13, 21, 29,
6, 14, 22, 30,
7, 15, 23, 31
);

wasm_v128_store(ptr, r0_.v128);
wasm_v128_store(ptr + sizeof(r0_), r1_.v128);
#else
simde_uint8x8_private a_[4] = { simde_uint8x8_to_private(val.val[0]), simde_uint8x8_to_private(val.val[1]),
simde_uint8x8_to_private(val.val[2]), simde_uint8x8_to_private(val.val[3]) };
Expand Down