src/panfrost/compiler/test/test-lower-swizzle.cpp

/*
 * Copyright (C) 2022 Collabora, Ltd.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

#include "bi_builder.h"
#include "bi_test.h"
#include "compiler.h"

#include <gtest/gtest.h>

#define CASE(instr, expected)                                                  \
   INSTRUCTION_CASE(instr, expected, bi_lower_swizzle)
#define NEGCASE(instr) CASE(instr, instr)

class LowerSwizzle : public testing::Test {
 protected:
   LowerSwizzle()
   {
      mem_ctx = ralloc_context(NULL);

      reg = bi_register(0);
      x = bi_register(1);
      y = bi_register(2);
      z = bi_register(3);
      w = bi_register(4);

      x3210 = x;
      x3210.swizzle = BI_SWIZZLE_B3210;
   }

   ~LowerSwizzle()
   {
      ralloc_free(mem_ctx);
   }

   void *mem_ctx;

   bi_index reg, x, y, z, w;
   bi_index x3210;
};

TEST_F(LowerSwizzle, Csel16)
{
   CASE(bi_csel_v2f16_to(b, reg, bi_half(x, 0), y, z, w, BI_CMPF_NE),
        bi_csel_v2f16_to(b, reg, bi_swz_v2i16(b, bi_half(x, 0)), y, z, w,
                         BI_CMPF_NE));
}

TEST_F(LowerSwizzle, Fma16)
{
   NEGCASE(bi_fadd_v2f16_to(b, reg, bi_half(x, 0), y));
   NEGCASE(bi_fma_v2f16_to(b, reg, bi_half(x, 0), y, z));
}

TEST_F(LowerSwizzle, ClzHadd8)
{
   CASE(bi_clz_v4u8_to(b, reg, x3210, true),
        bi_clz_v4u8_to(b, reg, bi_swz_v4i8(b, x3210), true));

   CASE(bi_hadd_v4u8_to(b, reg, y, x3210, BI_ROUND_RTP),
        bi_hadd_v4u8_to(b, reg, y, bi_swz_v4i8(b, x3210), BI_ROUND_RTP));
}

TEST_F(LowerSwizzle, FirstShift8)
{
   enum bi_opcode ops[] = {
      BI_OPCODE_LSHIFT_AND_V4I8, BI_OPCODE_LSHIFT_OR_V4I8,
      BI_OPCODE_LSHIFT_XOR_V4I8, BI_OPCODE_RSHIFT_AND_V4I8,
      BI_OPCODE_RSHIFT_OR_V4I8,  BI_OPCODE_RSHIFT_XOR_V4I8,
   };

   for (unsigned i = 0; i < ARRAY_SIZE(ops); ++i) {
      CASE(
         {
            bi_instr *I = bi_lshift_and_v4i8_to(b, reg, x3210, y, z);
            I->op = ops[i];
         },
         {
            bi_instr *I =
               bi_lshift_and_v4i8_to(b, reg, bi_swz_v4i8(b, x3210), y, z);
            I->op = ops[i];
         });
   }
}

TEST_F(LowerSwizzle, ShiftWithNot)
{
   CASE(bi_lshift_and_v4i8_to(b, reg, y, bi_neg(x3210), z),
        bi_lshift_and_v4i8_to(b, reg, y, bi_neg(bi_swz_v4i8(b, x3210)), z));
}

TEST_F(LowerSwizzle, FClampSwap)
{
   CASE(bi_fclamp_v2f16_to(b, reg, bi_swz_16(x, 1, 0)),
        bi_swz_v2i16_to(b, reg, bi_swz_16(bi_fclamp_v2f16(b, x), 1, 0)));
}