Add WAsm SIMD microkernel for f32-rsqrt.
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fbarchard
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May 21, 2024
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| const v128_t vt0123 = wasm_f32x4_sqrt(vx0123); | ||
| const v128_t vt4567 = wasm_f32x4_sqrt(vx4567); | ||
| const v128_t vy0123 = wasm_f32x4_div(vone, vt0123); |
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some cpus dont support div, such as arm. Is there an alternative way to get reciprocal?
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Not really, since WASM SIMD does not support rcp or rsqrt approximations, since they would not be identical across all platforms.
We could compute an rsqrt approximation ourselves, e.g. a polynomial, but I doubt that would be faster than whatever WASM would to under the hood here.
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Add
WAsm SIMDmicrokernel forf32-rsqrt.