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export const description = `
Execution tests for the 'exp2' builtin function
S is AbstractFloat, f32, f16
T is S or vecN<S>
@const fn exp2(e: T ) -> T
Returns 2 raised to the power e (e.g. 2^e). Component-wise when T is a vector.
`;
import { makeTestGroup } from '../../../../../../common/framework/test_group.js';
import { GPUTest } from '../../../../../gpu_test.js';
import { kValue } from '../../../../../util/constants.js';
import { TypeF32 } from '../../../../../util/conversion.js';
import { exp2Interval } from '../../../../../util/f32_interval.js';
import { biasedRange, linearRange } from '../../../../../util/math.js';
import { makeCaseCache } from '../../case_cache.js';
import { allInputSources, generateUnaryToF32IntervalCases, run } from '../../expression.js';
import { builtin } from './builtin.js';
export const g = makeTestGroup(GPUTest);
// floor(log2(max f32 value)) = 127, so exp2(127) will be within range of a f32, but exp2(128) will not
// floor(ln(max f64 value)) = 1023, so exp2(1023) can be handled by the testing framework, but exp2(1024) will misbehave
const inputs = [
0, // Returns 1 by definition
-128, // Returns subnormal value
kValue.f32.negative.min, // Closest to returning 0 as possible
...biasedRange(kValue.f32.negative.max, -127, 100),
...biasedRange(kValue.f32.positive.min, 127, 100),
...linearRange(128, 1023, 10), // Overflows f32, but not f64
];
export const d = makeCaseCache('exp2', {
f32_const: () => {
return generateUnaryToF32IntervalCases(inputs, 'f32-only', exp2Interval);
},
f32_non_const: () => {
return generateUnaryToF32IntervalCases(inputs, 'unfiltered', exp2Interval);
},
});
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('exp2'), [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();
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