skia2/tests/SkVxTest.cpp

/*
 * Copyright 2019 Google Inc.
 *
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */

#include "SkVx.h"
#include "Test.h"

using float2 = skvx::Vec<2,float>;
using float4 = skvx::Vec<4,float>;
using float8 = skvx::Vec<8,float>;

using double2 = skvx::Vec<2,double>;
using double4 = skvx::Vec<4,double>;
using double8 = skvx::Vec<8,double>;

using byte2 = skvx::Vec<2,uint8_t>;
using byte4 = skvx::Vec<4,uint8_t>;
using byte8 = skvx::Vec<8,uint8_t>;

using int2 = skvx::Vec<2,int32_t>;
using int4 = skvx::Vec<4,int32_t>;
using int8 = skvx::Vec<8,int32_t>;

using long2 = skvx::Vec<2,int64_t>;
using long4 = skvx::Vec<4,int64_t>;
using long8 = skvx::Vec<8,int64_t>;

// These are unused, and just here so I can look at the disassembly.
float2 Sqrt(float2 x) { return sqrt(x); }
float4 Sqrt(float4 x) { return sqrt(x); }
float8 Sqrt(float8 x) { return sqrt(x); }

float4 RSqrt(float4 x) { return rsqrt(x); }
float4   Rcp(float4 x) { return   rcp(x); }
float4  Ceil(float4 x) { return  ceil(x); }
float4 Floor(float4 x) { return floor(x); }
float4 Trunc(float4 x) { return trunc(x); }
float4 Round(float4 x) { return round(x); }
float4   Abs(float4 x) { return   abs(x); }

float4 Min(float4 x, float4 y) { return min(x,y); }
float4 Max(float4 x, float4 y) { return max(x,y); }

float4 IfThenElse(int4 c, float4 t, float4 e) { return if_then_else(c,t,e); }

DEF_TEST(SkVx, r) {
    static_assert(sizeof(float2) ==  8, "");
    static_assert(sizeof(float4) == 16, "");
    static_assert(sizeof(float8) == 32, "");

    static_assert(sizeof(byte2) == 2, "");
    static_assert(sizeof(byte4) == 4, "");
    static_assert(sizeof(byte8) == 8, "");

    {
        int4 mask = float4{1,2,3,4} < float4{1,2,4,8};
        REPORTER_ASSERT(r, mask[0] == int32_t( 0));
        REPORTER_ASSERT(r, mask[1] == int32_t( 0));
        REPORTER_ASSERT(r, mask[2] == int32_t(-1));
        REPORTER_ASSERT(r, mask[3] == int32_t(-1));

        REPORTER_ASSERT(r,  any(mask));
        REPORTER_ASSERT(r, !all(mask));
    }

    {
        long4 mask = double4{1,2,3,4} < double4{1,2,4,8};
        REPORTER_ASSERT(r, mask[0] == int64_t( 0));
        REPORTER_ASSERT(r, mask[1] == int64_t( 0));
        REPORTER_ASSERT(r, mask[2] == int64_t(-1));
        REPORTER_ASSERT(r, mask[3] == int64_t(-1));

        REPORTER_ASSERT(r,  any(mask));
        REPORTER_ASSERT(r, !all(mask));
    }

    REPORTER_ASSERT(r, min(float4{1,2,3,4}) == 1);
    REPORTER_ASSERT(r, max(float4{1,2,3,4}) == 4);

    REPORTER_ASSERT(r, all(int4{1,2,3,4,5} == int4{1,2,3,4}));
    REPORTER_ASSERT(r, all(int4{1,2,3,4}   == int4{1,2,3,4}));
    REPORTER_ASSERT(r, all(int4{1,2,3}     == int4{1,2,3,0}));
    REPORTER_ASSERT(r, all(int4{1,2}       == int4{1,2,0,0}));
    REPORTER_ASSERT(r, all(int4{1}         == int4{1,0,0,0}));
    REPORTER_ASSERT(r, all(int4(1)         == int4{1,1,1,1}));
    REPORTER_ASSERT(r, all(int4{}          == int4{0,0,0,0}));
    REPORTER_ASSERT(r, all(int4()          == int4{0,0,0,0}));

    REPORTER_ASSERT(r, all(int4{1,2,2,1} == min(int4{1,2,3,4}, int4{4,3,2,1})));
    REPORTER_ASSERT(r, all(int4{4,3,3,4} == max(int4{1,2,3,4}, int4{4,3,2,1})));

    REPORTER_ASSERT(r, all(if_then_else(float4{1,2,3,2} <= float4{2,2,2,2}, float4(42), float4(47))
                           == float4{42,42,47,42}));

    REPORTER_ASSERT(r, all(floor(float4{-1.5f,1.5f,1.0f,-1.0f}) == float4{-2.0f,1.0f,1.0f,-1.0f}));
    REPORTER_ASSERT(r, all( ceil(float4{-1.5f,1.5f,1.0f,-1.0f}) == float4{-1.0f,2.0f,1.0f,-1.0f}));
    REPORTER_ASSERT(r, all(trunc(float4{-1.5f,1.5f,1.0f,-1.0f}) == float4{-1.0f,1.0f,1.0f,-1.0f}));
    REPORTER_ASSERT(r, all(round(float4{-1.5f,1.5f,1.0f,-1.0f}) == float4{-2.0f,2.0f,1.0f,-1.0f}));


    REPORTER_ASSERT(r, all(abs(float4{-2,-1,0,1}) == float4{2,1,0,1}));

    // TODO(mtklein): these tests could be made less loose.
    REPORTER_ASSERT(r, all( sqrt(float4{2,3,4,5}) < float4{2,2,3,3}));
    REPORTER_ASSERT(r, all(  rcp(float4{2,3,4,5}) < float4{1.0f,0.5f,0.5f,0.3f}));
    REPORTER_ASSERT(r, all(rsqrt(float4{2,3,4,5}) < float4{1.0f,1.0f,1.0f,0.5f}));

    REPORTER_ASSERT(r, all( sqrt(float2{2,3}) < float2{2,2}));
    REPORTER_ASSERT(r, all(  rcp(float2{2,3}) < float2{1.0f,0.5f}));
    REPORTER_ASSERT(r, all(rsqrt(float2{2,3}) < float2{1.0f,1.0f}));

    REPORTER_ASSERT(r, all(skvx::cast<int>(float4{-1.5f,0.5f,1.0f,1.5f}) == int4{-1,0,1,1}));

    float buf[] = {1,2,3,4,5,6};
    REPORTER_ASSERT(r, all(float4::Load(buf) == float4{1,2,3,4}));
    float4{2,3,4,5}.store(buf);
    REPORTER_ASSERT(r, buf[0] == 2
                    && buf[1] == 3
                    && buf[2] == 4
                    && buf[3] == 5
                    && buf[4] == 5
                    && buf[5] == 6);
    REPORTER_ASSERT(r, all(float4::Load(buf+0) == float4{2,3,4,5}));
    REPORTER_ASSERT(r, all(float4::Load(buf+2) == float4{4,5,5,6}));

    REPORTER_ASSERT(r, all(mad(float4{1,2,3,4}, 2.0f, 3.0f) == float4{5,7,9,11}));

    REPORTER_ASSERT(r, all(skvx::shuffle<2,1,0,3>        (float4{1,2,3,4}) == float4{3,2,1,4}));
    REPORTER_ASSERT(r, all(skvx::shuffle<2,1>            (float4{1,2,3,4}) == float2{3,2}));
    REPORTER_ASSERT(r, all(skvx::shuffle<3,3,3,3>        (float4{1,2,3,4}) == float4{4,4,4,4}));
    REPORTER_ASSERT(r, all(skvx::shuffle<2,1,2,1,2,1,2,1>(float4{1,2,3,4})
                           == float8{3,2,3,2,3,2,3,2}));

    // Test that mixed types can be used where they make sense.  Mostly about ergonomics.
    REPORTER_ASSERT(r, all(float4{1,2,3,4} < 5));
    REPORTER_ASSERT(r, all( byte4{1,2,3,4} < 5));
    REPORTER_ASSERT(r, all(  int4{1,2,3,4} < 5.0f));
    float4 five = 5;
    REPORTER_ASSERT(r, all(five == 5.0f));
    REPORTER_ASSERT(r, all(five == 5));

    REPORTER_ASSERT(r, all(max(2, min(float4{1,2,3,4}, 3)) == float4{2,2,3,3}));
}