Leandro Campos Posts - Answer Overflow

Leandro Campos

•Created by Leandro Campos on 6/12/2024 in #community-showcase

Specials: Accurate, Hardware Accelerated, Special Functions in Mojo

Specials is a Mojo package designed to provide highly-optimized and hardware-acceleration-friendly special functions implementations for AI computing. https://github.com/leandrolcampos/specials

7 replies

MModular

•Created by Leandro Campos on 2/1/2024 in #questions

DTypePointer to StaticTuple array

Suppose I have defined a static tuple x as follows: var x = StaticTuple[4, Float32](1.0, 2.0, 3.0, 4.0). Is it possible to create an instance of DTypePointer[DType.float32] from the address of x's underlying storage?

7 replies

MModular

•Created by Leandro Campos on 12/7/2023 in #questions

Are literals splatted in SIMD Operations?

Is there any performance difference if I write this

fn multiply_by_two[
    dtype: DType, simd_width: Int
](x: SIMD[dtype, simd_width]) -> SIMD[dtype, simd_width]:
    alias splatted_two = SIMD[dtype, simd_width](2.)
    return splatted_two * x

fn multiply_by_two[
    dtype: DType, simd_width: Int
](x: SIMD[dtype, simd_width]) -> SIMD[dtype, simd_width]:
    alias splatted_two = SIMD[dtype, simd_width](2.)
    return splatted_two * x

instead of this?

fn multiply_by_two[
    dtype: DType, simd_width: Int
](x: SIMD[dtype, simd_width]) -> SIMD[dtype, simd_width]:
    return 2.0 * x

fn multiply_by_two[
    dtype: DType, simd_width: Int
](x: SIMD[dtype, simd_width]) -> SIMD[dtype, simd_width]:
    return 2.0 * x

In other words, is the literal 2 transformed into a splatted SIMD vector at runtime every time multiply_by_two is called? Or is this something that the compiler is able to optimize?

4 replies

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