• Milad Fa's avatar
    PPC/s390: [wasm-simd] Implement double precision conversion · 9886c9f6
    Milad Fa authored
    Port 3b6eb335
    
    Original Commit Message:
    
        Prototype these 6 instructions on arm:
    
        - f64x2.convert_low_i32x4_s
        - f64x2.convert_low_i32x4_u
        - i32x4.trunc_sat_f64x2_s_zero
        - i32x4.trunc_sat_f64x2_u_zero
        - f32x4.demote_f64x2_zero
        - f64x2.promote_low_f32x4
    
        For all these instructions we rely on having Q registers that map to S
        registers, which means we can only use q0 to q7. We fix the src/dst
        to q0 arbitrarily.
    
    R=zhin@chromium.org, joransiu@ca.ibm.com, junyan@redhat.com, midawson@redhat.com
    BUG=
    LOG=N
    
    Bug: v8:11265
    Change-Id: Ibef0b05fe1066cd79ddcda12787441b09cc8ede2
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2684360Reviewed-by: 's avatarJunliang Yan <junyan@redhat.com>
    Commit-Queue: Milad Fa <mfarazma@redhat.com>
    Cr-Commit-Position: refs/heads/master@{#72600}
    9886c9f6
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