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export const description = `
Execution tests for the 'clamp' builtin function
S is AbstractInt, i32, or u32
T is S or vecN<S>
@const fn clamp(e: T , low: T, high: T) -> T
Returns min(max(e,low),high). Component-wise when T is a vector.
S is AbstractFloat, f32, f16
T is S or vecN<S>
@const clamp(e: T , low: T , high: T) -> T
Returns either min(max(e,low),high), or the median of the three values e, low, high.
Component-wise when T is a vector.
`;
import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
import { GPUTest } from '../../../../../gpu_test.js';
import { kBit } from '../../../../../util/constants.js';
import {
i32,
i32Bits,
Scalar,
TypeF32,
TypeI32,
TypeU32,
u32,
u32Bits,
} from '../../../../../util/conversion.js';
import { clampIntervals } from '../../../../../util/f32_interval.js';
import { sparseF32Range } from '../../../../../util/math.js';
import { makeCaseCache } from '../../case_cache.js';
import { allInputSources, Case, generateTernaryToF32IntervalCases, run } from '../../expression.js';
import { builtin } from './builtin.js';
export const g = makeTestGroup(GPUTest);
export const d = makeCaseCache('clamp', {
u32: () => {
// This array must be strictly increasing, since that ordering determines
// the expected values.
const test_values: Array<Scalar> = [
u32Bits(kBit.u32.min),
u32(1),
u32(2),
u32(0x70000000),
u32(0x80000000),
u32Bits(kBit.u32.max),
];
return generateIntegerTestCases(test_values);
},
i32: () => {
// This array must be strictly increasing, since that ordering determines
// the expected values.
const test_values: Array<Scalar> = [
i32Bits(kBit.i32.negative.min),
i32(-2),
i32(-1),
i32(0),
i32(1),
i32(2),
i32Bits(0x70000000),
i32Bits(kBit.i32.positive.max),
];
return generateIntegerTestCases(test_values);
},
f32_const: () => {
return generateTernaryToF32IntervalCases(
sparseF32Range(),
sparseF32Range(),
sparseF32Range(),
'f32-only',
...clampIntervals
);
},
f32_non_const: () => {
return generateTernaryToF32IntervalCases(
sparseF32Range(),
sparseF32Range(),
sparseF32Range(),
'unfiltered',
...clampIntervals
);
},
});
/**
* Calculates clamp using the min-max formula.
* clamp(e, f, g) = min(max(e, f), g)
*
* Operates on indices of an ascending sorted array, instead of the actual
* values to avoid rounding issues.
*
* @returns the index of the clamped value
*/
function calculateMinMaxClamp(ei: number, fi: number, gi: number): number {
return Math.min(Math.max(ei, fi), gi);
}
/** @returns a set of clamp test cases from an ascending list of integer values */
function generateIntegerTestCases(test_values: Array<Scalar>): Array<Case> {
const cases = new Array<Case>();
test_values.forEach((e, ei) => {
test_values.forEach((f, fi) => {
test_values.forEach((g, gi) => {
const expected_idx = calculateMinMaxClamp(ei, fi, gi);
const expected = test_values[expected_idx];
cases.push({ input: [e, f, g], expected });
});
});
});
return cases;
}
g.test('abstract_int')
.specURL('https://www.w3.org/TR/WGSL/#integer-builtin-functions')
.desc(`abstract int tests`)
.params(u =>
u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
)
.unimplemented();
g.test('u32')
.specURL('https://www.w3.org/TR/WGSL/#integer-builtin-functions')
.desc(`u32 tests`)
.params(u =>
u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
)
.fn(async t => {
const cases = await d.get('u32');
await run(t, builtin('clamp'), [TypeU32, TypeU32, TypeU32], TypeU32, t.params, cases);
});
g.test('i32')
.specURL('https://www.w3.org/TR/WGSL/#integer-builtin-functions')
.desc(`i32 tests`)
.params(u =>
u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
)
.fn(async t => {
const cases = await d.get('i32');
await run(t, builtin('clamp'), [TypeI32, TypeI32, TypeI32], TypeI32, t.params, cases);
});
g.test('abstract_float')
.specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
.desc(`abstract float tests`)
.params(u =>
u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
)
.unimplemented();
g.test('f32')
.specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
.desc(`f32 tests`)
.params(u =>
u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
)
.fn(async t => {
const cases = await d.get(t.params.inputSource === 'const' ? 'f32_const' : 'f32_non_const');
await run(t, builtin('clamp'), [TypeF32, TypeF32, TypeF32], TypeF32, t.params, cases);
});
g.test('f16')
.specURL('https://www.w3.org/TR/WGSL/#float-builtin-functions')
.desc(`f16 tests`)
.params(u =>
u.combine('inputSource', allInputSources).combine('vectorize', [undefined, 2, 3, 4] as const)
)
.unimplemented();
|
