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export const description = `
Converts two floating point values to half-precision floating point numbers, and then combines them into one u32 value.
Component e[i] of the input is converted to a IEEE-754 binary16 value,
which is then placed in bits 16 × i through 16 × i + 15 of the result.
`;
import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
import { GPUTest } from '../../../../../gpu_test.js';
import { anyOf, skipUndefined } from '../../../../../util/compare.js';
import {
f32,
pack2x16float,
TypeF32,
TypeU32,
TypeVec,
u32,
vec2,
} from '../../../../../util/conversion.js';
import { cartesianProduct, fullF32Range, quantizeToF32 } from '../../../../../util/math.js';
import { makeCaseCache } from '../../case_cache.js';
import { allInputSources, Case, run } from '../../expression.js';
import { builtin } from './builtin.js';
export const g = makeTestGroup(GPUTest);
// pack2x16float has somewhat unusual behaviour, specifically around how it is
// supposed to behave when values go OOB and when they are considered to have
// gone OOB, so has its own bespoke implementation.
/**
* @returns a Case for `pack2x16float`
* @param param0 first param for the case
* @param param1 second param for the case
* @param filter_undefined should inputs that cause an undefined expectation be
* filtered out, needed for const-eval
*/
function makeCase(param0: number, param1: number, filter_undefined: boolean): Case | undefined {
param0 = quantizeToF32(param0);
param1 = quantizeToF32(param1);
const results = pack2x16float(param0, param1);
if (filter_undefined && results.some(r => r === undefined)) {
return undefined;
}
return {
input: [vec2(f32(param0), f32(param1))],
expected: anyOf(
...results.map(r => (r === undefined ? skipUndefined(undefined) : skipUndefined(u32(r))))
),
};
}
/**
* @returns an array of Cases for `pack2x16float`
* @param param0s array of inputs to try for the first param
* @param param1s array of inputs to try for the second param
* @param filter_undefined should inputs that cause an undefined expectation be
* filtered out, needed for const-eval
*/
function generateCases(param0s: number[], param1s: number[], filter_undefined: boolean): Case[] {
return cartesianProduct(param0s, param1s)
.map(e => makeCase(e[0], e[1], filter_undefined))
.filter((c): c is Case => c !== undefined);
}
export const d = makeCaseCache('pack2x16float', {
f32_const: () => {
return generateCases(fullF32Range(), fullF32Range(), true);
},
f32_non_const: () => {
return generateCases(fullF32Range(), fullF32Range(), false);
},
});
g.test('pack')
.specURL('https://www.w3.org/TR/WGSL/#pack-builtin-functions')
.desc(
`
@const fn pack2x16float(e: vec2<f32>) -> u32
`
)
.params(u => u.combine('inputSource', allInputSources))
.fn(async t => {
const cases = await d.get(t.params.inputSource === 'const' ? 'f32_const' : 'f32_non_const');
await run(t, builtin('pack2x16float'), [TypeVec(2, TypeF32)], TypeU32, t.params, cases);
});
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