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74f1d4f47b
Minor adjustments to formatting of the copyright line, but keep dates and holders. "Authors" entries that could be obtained via Git logs were also removed. The license in brw_disasm.c and elk_disasm.c don't match directly any SPDX pattern I could find, so kept as is. Reviewed-by: Ian Romanick <ian.d.romanick@intel.com> Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@intel.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/39503>
92 lines
2 KiB
C++
92 lines
2 KiB
C++
/*
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* Copyright © 2014 Intel Corporation
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* SPDX-License-Identifier: MIT
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*/
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#include <gtest/gtest.h>
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#include <math.h>
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#include "brw_reg.h"
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class vf_float_conversion_test : public ::testing::Test {
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virtual void SetUp();
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public:
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float vf_to_float[128];
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};
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void vf_float_conversion_test::SetUp() {
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/* 0 is special cased. */
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vf_to_float[0] = 0.0;
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for (int vf = 1; vf < 128; vf++) {
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int ebits = (vf >> 4) & 0x7;
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int mbits = vf & 0xf;
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float x = 1.0f + mbits / 16.0f;
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int exp = ebits - 3;
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vf_to_float[vf] = ldexpf(x, exp);
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}
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}
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union fu {
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float f;
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unsigned u;
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};
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static unsigned
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f2u(float f)
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{
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union fu fu;
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fu.f = f;
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return fu.u;
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}
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TEST_F(vf_float_conversion_test, test_vf_to_float)
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{
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for (int vf = 0; vf < 256; vf++) {
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float expected = vf_to_float[vf % 128];
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if (vf > 127)
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expected = -expected;
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EXPECT_EQ(f2u(expected), f2u(brw_vf_to_float(vf)));
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}
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}
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TEST_F(vf_float_conversion_test, test_float_to_vf)
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{
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for (int vf = 0; vf < 256; vf++) {
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float f = vf_to_float[vf % 128];
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if (vf > 127)
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f = -f;
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EXPECT_EQ(vf, brw_float_to_vf(f));
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}
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}
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TEST_F(vf_float_conversion_test, test_special_case_0)
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{
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/* ±0.0f are special cased to the VFs that would otherwise correspond
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* to ±0.125f. Make sure we can't convert these values to VF.
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*/
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EXPECT_EQ(brw_float_to_vf(+0.125f), -1);
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EXPECT_EQ(brw_float_to_vf(-0.125f), -1);
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EXPECT_EQ(f2u(brw_vf_to_float(brw_float_to_vf(+0.0f))), f2u(+0.0f));
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EXPECT_EQ(f2u(brw_vf_to_float(brw_float_to_vf(-0.0f))), f2u(-0.0f));
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}
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TEST_F(vf_float_conversion_test, test_nonrepresentable_float_input)
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{
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EXPECT_EQ(brw_float_to_vf(+32.0f), -1);
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EXPECT_EQ(brw_float_to_vf(-32.0f), -1);
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EXPECT_EQ(brw_float_to_vf(+16.5f), -1);
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EXPECT_EQ(brw_float_to_vf(-16.5f), -1);
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EXPECT_EQ(brw_float_to_vf(+8.25f), -1);
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EXPECT_EQ(brw_float_to_vf(-8.25f), -1);
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EXPECT_EQ(brw_float_to_vf(+4.125f), -1);
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EXPECT_EQ(brw_float_to_vf(-4.125f), -1);
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}
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