`f64FromParts()`

함수, 내장 함수 분류

Assemble an f64 from its (hi, lo) f32 halves, the shader-side counterpart of splitF64 for a value that arrives as two f32 components.

import { f64FromParts } from 'typeshade'

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구문

const f64FromParts: (
  hi: ReadonlyNode<"f32"> | number,
  lo: ReadonlyNode<"f32"> | number,
) => Node<"f64">

매개변수

hi ReadonlyNode<'f32'> | number
lo ReadonlyNode<'f32'> | number

반환값

Node<'f64'>

설명

Assemble an f64 from its (hi, lo) f32 halves, the shader-side counterpart of splitF64 for a value that arrives as two f32 components (a hi/lo vertex attribute pair, a packed buffer). It costs nothing: the result is the pair (hi, lo) itself. The halves must be a normalized split, lo = x − hi as splitF64 produces. Nothing renormalizes a pair that is not: the comparisons decide on hi first and can answer wrongly for it ((1, 1) is 2, yet it compares below (1.5, 0)), and a multiply or divide by a power-of-two literal scales the two words as they are, so the product is exactly as un-normalized as the operand.

대상별 지원

대상	지원	비고
WGSL (WebGPU)	에뮬레이션	Rewritten by `fp64Lower` into a pair of `f32` lanes before the backend runs.
GLSL ES 3.00 (WebGL2)	에뮬레이션	Rewritten by `fp64Lower` into a pair of `f32` lanes before the backend runs.
CPU 오라클	지원	Evaluated in f64 by the oracle.

소스

src/core/ir/node.ts, 2389행, 커밋 26de7be8 기준

이 페이지 편집 문제 보고

f64FromParts()

구문

매개변수

반환값

설명

대상별 지원

관련 가이드

소스

`f64FromParts()`