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Implement fcvt_to_uint_sat (f32x4 -> i32x4) for x86 #1822

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wants to merge 4 commits into from
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Implement fcvt_to_uint_sat (f32x4 -> i32x4) for x86 #1822

wants to merge 4 commits into from

Commits on Jul 1, 2020

  1. Add x86_vcvtps2udq instruction 

    This allows x86 machines with the right AVX features to lower fcvt_to_uint_sat.i32x4 to a single instruction.
    @abrown
    abrown committed Jul 1, 2020
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  2. Add x86 legalization for fcvt_to_uint_sat.i32x4 

    This converts an `f32x4` into an `i32x4` (unsigned) with some rounding either by using an AVX512VL/F instruction--VCVTPS2UDQ--or a long sequence of SSE4.1 compatible instructions.
    @abrown
    abrown committed Jul 1, 2020
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  3. Translate Wasm's i32x4.trunc_sat_f32x4_u to Cranelift's fcvt_to_uint_… 

    …sat.i32x4
    @abrown
    abrown committed Jul 1, 2020
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  4. Enable more SIMD spec tests

    @abrown
    abrown committed Jul 1, 2020
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