sfmt
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rust-math
Support for `wasm32-unknown-unknown` target
Background
When compiling a project that depends on this library with the --target wasm32-unknown-unknown option, the following error occurs:
error[E0412]: cannot find type `__m128i` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:9:25
|
9 | pub(crate) type i32x4 = __m128i;
| ^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_set_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:12:14
|
12 | unsafe { _mm_set_epi32(e3, e2, e1, e0) }
| ^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_setzero_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:16:14
|
16 | unsafe { _mm_setzero_si128() }
| ^^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_extract_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:22:18
|
22 | 0 => _mm_extract_epi32(vals, 0) as u32,
| ^^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_extract_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:23:18
|
23 | 1 => _mm_extract_epi32(vals, 1) as u32,
| ^^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_extract_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:24:18
|
24 | 2 => _mm_extract_epi32(vals, 2) as u32,
| ^^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_extract_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:25:18
|
25 | 3 => _mm_extract_epi32(vals, 3) as u32,
| ^^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_insert_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:34:18
|
34 | 0 => _mm_insert_epi32(*vals, val, 0),
| ^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_insert_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:35:18
|
35 | 1 => _mm_insert_epi32(*vals, val, 1),
| ^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_insert_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:36:18
|
36 | 2 => _mm_insert_epi32(*vals, val, 2),
| ^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_insert_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/packed.rs:37:18
|
37 | 3 => _mm_insert_epi32(*vals, val, 3),
| ^^^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_srli_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:32:17
|
32 | let y = _mm_srli_epi32(b, SFMT_SR1);
| ^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_srli_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:33:17
|
33 | let z = _mm_srli_si128(c, SFMT_SR2);
| ^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_slli_epi32` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:34:17
|
34 | let v = _mm_slli_epi32(d, SFMT_SL1);
| ^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_xor_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:35:17
|
35 | let z = _mm_xor_si128(z, a);
| ^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_xor_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:36:17
|
36 | let z = _mm_xor_si128(z, v);
| ^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_slli_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:37:17
|
37 | let x = _mm_slli_si128(a, SFMT_SL2);
| ^^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_and_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:38:17
|
38 | let y = _mm_and_si128(y, mask);
| ^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_xor_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:39:17
|
39 | let z = _mm_xor_si128(z, x);
| ^^^^^^^^^^^^^ not found in this scope
error[E0425]: cannot find function `_mm_xor_si128` in this scope
--> /Users/odan/.cargo/registry/src/index.crates.io-6f17d22bba15001f/sfmt-0.7.0/src/sfmt.rs:40:9
|
40 | _mm_xor_si128(z, y)
| ^^^^^^^^^^^^^ not found in this scope
This error occurs because functions starting with _mm_ are not defined when target_arch is wasm32.
Motivation
By supporting wasm32, this library can be used in edge environments such as Cloudflare Workers.
Solution
To solve this issue, I have an idea to define these types and functions using core::arch::wasm32.
This idea is inspired by the article Authoring a SIMD enhanced Wasm library with Rust.
I am very interested in adding wasm32 support. I plan to use core::arch::wasm32 to define the necessary types and functions to achieve this. Here is a brief outline of the code I intend to implement:
#[cfg(target_arch = "wasm32")]
type i32x4 = v128;
#[cfg(target_arch = "wasm32")]
unsafe fn _mm_setzero_si128() -> v128 {
return i32x4(0, 0, 0, 0);
}
Would it be possible for me to create a pull request to add this support?
