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/**
* AUTO-GENERATED - DO NOT EDIT. Source: https://github.com/gpuweb/cts
**/export const description = `
Converts four normalized floating point values to 8-bit signed integers, and then combines them into one u32 value.
Component e[i] of the input is converted to an 8-bit twos complement integer value
⌊ 0.5 + 127 × min(1, max(-1, e[i])) ⌋ which is then placed in
bits 8 × i through 8 × i + 7 of the result.
`;import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
import { GPUTest } from '../../../../../gpu_test.js';
import { kValue } from '../../../../../util/constants.js';
import { f32, pack4x8snorm, u32, vec4, Type } from '../../../../../util/conversion.js';
import { quantizeToF32, vectorF32Range } from '../../../../../util/math.js';
import { allInputSources, run } from '../../expression.js';
import { builtin } from './builtin.js';
export const g = makeTestGroup(GPUTest);
g.test('pack').
specURL('https://www.w3.org/TR/WGSL/#pack-builtin-functions').
desc(
`
@const fn pack4x8snorm(e: vec4<f32>) -> u32
`
).
params((u) => u.combine('inputSource', allInputSources)).
fn(async (t) => {
const makeCase = (vals) => {
const vals_f32 = new Array(4);
for (const idx in vals) {
vals[idx] = quantizeToF32(vals[idx]);
vals_f32[idx] = f32(vals[idx]);
}
return { input: [vec4(...vals_f32)], expected: u32(pack4x8snorm(...vals)) };
};
// Returns a value normalized to [-1, 1].
const normalizeF32 = (n) => {
return n / kValue.f32.positive.max;
};
const cases = vectorF32Range(4).flatMap((v) => {
return [
makeCase(v),
makeCase(v.map(normalizeF32))];
});
await run(t, builtin('pack4x8snorm'), [Type.vec4f], Type.u32, t.params, cases);
});
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