core::arch::wasm32 - Rust
Description: API documentation for the Rust `wasm32` mod in crate `core`.
Keywords: rust, rustlang, rust-lang, wasm32

# 1.33.0[−][src]Module core::arch::wasm32

This is supported on WebAssembly only.

Platform-specific intrinsics for the `wasm32` platform.

This module provides intrinsics specific to the WebAssembly architecture. Here you'll find intrinsics necessary for leveraging WebAssembly proposals such as atomics and simd. These proposals are evolving over time and as such the support here is unstable and requires the nightly channel. As WebAssembly proposals stabilize these functions will also become stable.

See the module documentation for general information about the `arch` module and platform intrinsics.

## Atomics

The threads proposal for WebAssembly adds a number of instructions for dealing with multithreaded programs. Atomic instructions can all be generated through `std::sync::atomic` types, but some instructions have no equivalent in Rust such as `memory.atomic.notify` so this module will provide these intrinsics.

At this time, however, these intrinsics are only available when the standard library itself is compiled with atomics. Compiling with atomics is not enabled by default and requires passing `-Ctarget-feature=+atomics` to rustc. The standard library shipped via `rustup` is not compiled with atomics. To get access to these intrinsics you'll need to compile the standard library from source with the requisite compiler flags.

## SIMD

The simd proposal for WebAssembly adds a new `v128` type for a 128-bit SIMD register. It also adds a large array of instructions to operate on the `v128` type to perform data processing. The SIMD proposal has been in progress for quite some time and many instructions have come and gone. This module attempts to keep up with the proposal, but if you notice anything awry please feel free to open an issue.

It's important to be aware that the current state of development of SIMD in WebAssembly is still somewhat early days. There's lots of pieces to demo and prototype with, but discussions and support are still in progress. There's a number of pitfalls and gotchas in various places, which will attempt to be documented here, but there may be others lurking!

Using SIMD is intended to be similar to as you would on `x86_64`, for example. You'd write a function such as:

ⓘThis example is not tested

    #[cfg(target_arch = "wasm32")]
    #[target_feature(enable = "simd128")]
    unsafe fn uses_simd() {
        use std::arch::wasm32::*;
        // ...
    }

Run

Unlike `x86_64`, however, WebAssembly does not currently have dynamic detection at runtime as to whether SIMD is supported (this is one of the motivators for the conditional sections proposal, but that is still pretty early days). This means that your binary will either have SIMD and can only run on engines which support SIMD, or it will not have SIMD at all. For compatibility the standard library itself does not use any SIMD internally. Determining how best to ship your WebAssembly binary with SIMD is largely left up to you as it can can be pretty nuanced depending on your situation.

To enable SIMD support at compile time you need to do one of two things:

- First you can annotate functions with `#[target_feature(enable = "simd128")]`. This causes just that one function to have SIMD support available to it, and intrinsics will get inlined as usual in this situation.

- Second you can compile your program with `-Ctarget-feature=+simd128`. This compilation flag blanket enables SIMD support for your entire compilation. Note that this does not include the standard library unless you recompile the standard library.

If you enable SIMD via either of these routes then you'll have a WebAssembly binary that uses SIMD instructions, and you'll need to ship that accordingly. Also note that if you call SIMD intrinsics but don't enable SIMD via either of these mechanisms, you'll still have SIMD generated in your program. This means to generate a binary without SIMD you'll need to avoid both options above plus calling into any intrinsics in this module.

> Note: Due to rust-lang/rust#74320 it's recommended to compile your entire program with SIMD support (using `RUSTFLAGS`) or otherwise functions may not be inlined correctly.

> Note: LLVM's SIMD support is actually split into two features: `simd128` and `unimplemented-simd128`. Rust code can enable `simd128` with `#[target_feature]` (and test for it with `#[cfg(target_feature = "simd128")]`, but it cannot enable `unimplemented-simd128`. The only way to enable this feature is to compile with `-Ctarget-feature=+simd128,+unimplemented-simd128`. This second feature enables more recent instructions implemented in LLVM which haven't always had enough time to make their way to runtimes.

## Structs

v128 | Experimental WASM-specific 128-bit wide SIMD vector type.

## Functions

f32x4_abs⚠ | Experimental`simd128` Calculates the absolute value of each lane of a 128-bit vector interpreted as four 32-bit floating point numbers.
f32x4_add⚠ | Experimental`simd128` Adds pairwise lanes of two 128-bit vectors interpreted as four 32-bit floating point numbers.
f32x4_const⚠ | Experimental`simd128` Materializes a constant SIMD value from the immediate operands.
f32x4_convert_i32x4_s⚠ | Experimental`simd128` Converts a 128-bit vector interpreted as four 32-bit signed integers into a 128-bit vector of four 32-bit floating point numbers.
f32x4_convert_i32x4_u⚠ | Experimental`simd128` Converts a 128-bit vector interpreted as four 32-bit unsigned integers into a 128-bit vector of four 32-bit floating point numbers.
f32x4_div⚠ | Experimental`simd128` Divides pairwise lanes of two 128-bit vectors interpreted as four 32-bit floating point numbers.
f32x4_eq⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit floating point numbers.
f32x4_extract_lane⚠ | Experimental`simd128` Extracts a lane from a 128-bit vector interpreted as 4 packed f32 numbers.
f32x4_ge⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit floating point numbers.
f32x4_gt⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit floating point numbers.
f32x4_le⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit floating point numbers.
f32x4_lt⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit floating point numbers.
f32x4_max⚠ | Experimental`simd128` Calculates the maximum of pairwise lanes of two 128-bit vectors interpreted as four 32-bit floating point numbers.
f32x4_min⚠ | Experimental`simd128` Calculates the minimum of pairwise lanes of two 128-bit vectors interpreted as four 32-bit floating point numbers.
f32x4_mul⚠ | Experimental`simd128` Multiplies pairwise lanes of two 128-bit vectors interpreted as four 32-bit floating point numbers.
f32x4_ne⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit floating point numbers.
f32x4_neg⚠ | Experimental`simd128` Negates each lane of a 128-bit vector interpreted as four 32-bit floating point numbers.
f32x4_replace_lane⚠ | Experimental`simd128` Replaces a lane from a 128-bit vector interpreted as 4 packed f32 numbers.
f32x4_splat⚠ | Experimental`simd128` Creates a vector with identical lanes.
f32x4_sqrt⚠ | Experimental`simd128` Calculates the square root of each lane of a 128-bit vector interpreted as four 32-bit floating point numbers.
f32x4_sub⚠ | Experimental`simd128` Subtracts pairwise lanes of two 128-bit vectors interpreted as four 32-bit floating point numbers.
f64x2_abs⚠ | Experimental`simd128` Calculates the absolute value of each lane of a 128-bit vector interpreted as two 64-bit floating point numbers.
f64x2_add⚠ | Experimental`simd128` Adds pairwise lanes of two 128-bit vectors interpreted as two 64-bit floating point numbers.
f64x2_const⚠ | Experimental`simd128` Materializes a constant SIMD value from the immediate operands.
f64x2_div⚠ | Experimental`simd128` Divides pairwise lanes of two 128-bit vectors interpreted as two 64-bit floating point numbers.
f64x2_eq⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 2 sixty-four-bit floating point numbers.
f64x2_extract_lane⚠ | Experimental`simd128` Extracts a lane from a 128-bit vector interpreted as 2 packed f64 numbers.
f64x2_ge⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 2 sixty-four-bit floating point numbers.
f64x2_gt⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 2 sixty-four-bit floating point numbers.
f64x2_le⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 2 sixty-four-bit floating point numbers.
f64x2_lt⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 2 sixty-four-bit floating point numbers.
f64x2_max⚠ | Experimental`simd128` Calculates the maximum of pairwise lanes of two 128-bit vectors interpreted as two 64-bit floating point numbers.
f64x2_min⚠ | Experimental`simd128` Calculates the minimum of pairwise lanes of two 128-bit vectors interpreted as two 64-bit floating point numbers.
f64x2_mul⚠ | Experimental`simd128` Multiplies pairwise lanes of two 128-bit vectors interpreted as two 64-bit floating point numbers.
f64x2_ne⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 2 sixty-four-bit floating point numbers.
f64x2_neg⚠ | Experimental`simd128` Negates each lane of a 128-bit vector interpreted as two 64-bit floating point numbers.
f64x2_replace_lane⚠ | Experimental`simd128` Replaces a lane from a 128-bit vector interpreted as 2 packed f64 numbers.
f64x2_splat⚠ | Experimental`simd128` Creates a vector with identical lanes.
f64x2_sqrt⚠ | Experimental`simd128` Calculates the square root of each lane of a 128-bit vector interpreted as two 64-bit floating point numbers.
f64x2_sub⚠ | Experimental`simd128` Subtracts pairwise lanes of two 128-bit vectors interpreted as two 64-bit floating point numbers.
i8x16_abs⚠ | Experimental`simd128` Lane-wise wrapping absolute value.
i8x16_add⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed sixteen 8-bit integers.
i8x16_add_saturate_s⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed sixteen 8-bit signed integers, saturating on overflow to `i8::MAX`.
i8x16_add_saturate_u⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed sixteen 8-bit unsigned integers, saturating on overflow to `u8::MAX`.
i8x16_all_true⚠ | Experimental`simd128` Returns 1 if all lanes are nonzero or 0 if any lane is nonzero.
i8x16_any_true⚠ | Experimental`simd128` Returns 1 if any lane is nonzero or 0 if all lanes are zero.
i8x16_avgr_u⚠ | Experimental`simd128` Lane-wise rounding average.
i8x16_const⚠ | Experimental`simd128` Materializes a constant SIMD value from the immediate operands.
i8x16_eq⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit integers.
i8x16_extract_lane⚠ | Experimental`simd128` Extracts a lane from a 128-bit vector interpreted as 16 packed i8 numbers.
i8x16_ge_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit signed integers.
i8x16_ge_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit unsigned integers.
i8x16_gt_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit signed integers.
i8x16_gt_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit unsigned integers.
i8x16_le_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit signed integers.
i8x16_le_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit unsigned integers.
i8x16_lt_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit signed integers.
i8x16_lt_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit unsigned integers.
i8x16_max_s⚠ | Experimental`simd128` Compares lane-wise signed integers, and returns the maximum of each pair.
i8x16_max_u⚠ | Experimental`simd128` Compares lane-wise unsigned integers, and returns the maximum of each pair.
i8x16_min_s⚠ | Experimental`simd128` Compares lane-wise signed integers, and returns the minimum of each pair.
i8x16_min_u⚠ | Experimental`simd128` Compares lane-wise unsigned integers, and returns the minimum of each pair.
i8x16_narrow_i16x8_s⚠ | Experimental`simd128` Converts two input vectors into a smaller lane vector by narrowing each lane.
i8x16_narrow_i16x8_u⚠ | Experimental`simd128` Converts two input vectors into a smaller lane vector by narrowing each lane.
i8x16_ne⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 16 eight-bit integers.
i8x16_neg⚠ | Experimental`simd128` Negates a 128-bit vectors intepreted as sixteen 8-bit signed integers
i8x16_replace_lane⚠ | Experimental`simd128` Replaces a lane from a 128-bit vector interpreted as 16 packed i8 numbers.
i8x16_shl⚠ | Experimental`simd128` Shifts each lane to the left by the specified number of bits.
i8x16_shr_s⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, sign extending.
i8x16_shr_u⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, shifting in zeros.
i8x16_splat⚠ | Experimental`simd128` Creates a vector with identical lanes.
i8x16_sub⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed sixteen 8-bit integers.
i8x16_sub_saturate_s⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed sixteen 8-bit signed integers, saturating on overflow to `i8::MIN`.
i8x16_sub_saturate_u⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed sixteen 8-bit unsigned integers, saturating on overflow to 0.
i16x8_abs⚠ | Experimental`simd128` Lane-wise wrapping absolute value.
i16x8_add⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed eight 16-bit integers.
i16x8_add_saturate_s⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed eight 16-bit signed integers, saturating on overflow to `i16::MAX`.
i16x8_add_saturate_u⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed eight 16-bit unsigned integers, saturating on overflow to `u16::MAX`.
i16x8_all_true⚠ | Experimental`simd128` Returns 1 if all lanes are nonzero or 0 if any lane is nonzero.
i16x8_any_true⚠ | Experimental`simd128` Returns 1 if any lane is nonzero or 0 if all lanes are zero.
i16x8_avgr_u⚠ | Experimental`simd128` Lane-wise rounding average.
i16x8_const⚠ | Experimental`simd128` Materializes a constant SIMD value from the immediate operands.
i16x8_eq⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit integers.
i16x8_extract_lane⚠ | Experimental`simd128` Extracts a lane from a 128-bit vector interpreted as 8 packed i16 numbers.
i16x8_ge_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit signed integers.
i16x8_ge_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit unsigned integers.
i16x8_gt_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit signed integers.
i16x8_gt_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit unsigned integers.
i16x8_le_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit signed integers.
i16x8_le_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit unsigned integers.
i16x8_load8x8_s⚠ | Experimental`simd128` Load eight 8-bit integers and sign extend each one to a 16-bit lane
i16x8_load8x8_u⚠ | Experimental`simd128` Load eight 8-bit integers and zero extend each one to a 16-bit lane
i16x8_lt_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit signed integers.
i16x8_lt_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit unsigned integers.
i16x8_max_s⚠ | Experimental`simd128` Compares lane-wise signed integers, and returns the maximum of each pair.
i16x8_max_u⚠ | Experimental`simd128` Compares lane-wise unsigned integers, and returns the maximum of each pair.
i16x8_min_s⚠ | Experimental`simd128` Compares lane-wise signed integers, and returns the minimum of each pair.
i16x8_min_u⚠ | Experimental`simd128` Compares lane-wise unsigned integers, and returns the minimum of each pair.
i16x8_mul⚠ | Experimental`simd128` Multiplies two 128-bit vectors as if they were two packed eight 16-bit signed integers.
i16x8_narrow_i32x4_s⚠ | Experimental`simd128` Converts two input vectors into a smaller lane vector by narrowing each lane.
i16x8_narrow_i32x4_u⚠ | Experimental`simd128` Converts two input vectors into a smaller lane vector by narrowing each lane.
i16x8_ne⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 8 sixteen-bit integers.
i16x8_neg⚠ | Experimental`simd128` Negates a 128-bit vectors intepreted as eight 16-bit signed integers
i16x8_replace_lane⚠ | Experimental`simd128` Replaces a lane from a 128-bit vector interpreted as 8 packed i16 numbers.
i16x8_shl⚠ | Experimental`simd128` Shifts each lane to the left by the specified number of bits.
i16x8_shr_s⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, sign extending.
i16x8_shr_u⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, shifting in zeros.
i16x8_splat⚠ | Experimental`simd128` Creates a vector with identical lanes.
i16x8_sub⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed eight 16-bit integers.
i16x8_sub_saturate_s⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed eight 16-bit signed integers, saturating on overflow to `i16::MIN`.
i16x8_sub_saturate_u⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed eight 16-bit unsigned integers, saturating on overflow to 0.
i16x8_widen_high_i8x16_s⚠ | Experimental Converts high half of the smaller lane vector to a larger lane vector, sign extended.
i16x8_widen_high_i8x16_u⚠ | Experimental Converts high half of the smaller lane vector to a larger lane vector, zero extended.
i16x8_widen_low_i8x16_s⚠ | Experimental Converts low half of the smaller lane vector to a larger lane vector, sign extended.
i16x8_widen_low_i8x16_u⚠ | Experimental Converts low half of the smaller lane vector to a larger lane vector, zero extended.
i32x4_abs⚠ | Experimental`simd128` Lane-wise wrapping absolute value.
i32x4_add⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed four 32-bit integers.
i32x4_all_true⚠ | Experimental`simd128` Returns 1 if all lanes are nonzero or 0 if any lane is nonzero.
i32x4_any_true⚠ | Experimental`simd128` Returns 1 if any lane is nonzero or 0 if all lanes are zero.
i32x4_const⚠ | Experimental`simd128` Materializes a constant SIMD value from the immediate operands.
i32x4_eq⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit integers.
i32x4_extract_lane⚠ | Experimental`simd128` Extracts a lane from a 128-bit vector interpreted as 4 packed i32 numbers.
i32x4_ge_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit signed integers.
i32x4_ge_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit unsigned integers.
i32x4_gt_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit signed integers.
i32x4_gt_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit unsigned integers.
i32x4_le_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit signed integers.
i32x4_le_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit unsigned integers.
i32x4_load16x4_s⚠ | Experimental`simd128` Load four 16-bit integers and sign extend each one to a 32-bit lane
i32x4_load16x4_u⚠ | Experimental`simd128` Load four 16-bit integers and zero extend each one to a 32-bit lane
i32x4_lt_s⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit signed integers.
i32x4_lt_u⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit unsigned integers.
i32x4_max_s⚠ | Experimental`simd128` Compares lane-wise signed integers, and returns the maximum of each pair.
i32x4_max_u⚠ | Experimental`simd128` Compares lane-wise unsigned integers, and returns the maximum of each pair.
i32x4_min_s⚠ | Experimental`simd128` Compares lane-wise signed integers, and returns the minimum of each pair.
i32x4_min_u⚠ | Experimental`simd128` Compares lane-wise unsigned integers, and returns the minimum of each pair.
i32x4_mul⚠ | Experimental`simd128` Multiplies two 128-bit vectors as if they were two packed four 32-bit signed integers.
i32x4_ne⚠ | Experimental`simd128` Compares two 128-bit vectors as if they were two vectors of 4 thirty-two-bit integers.
i32x4_neg⚠ | Experimental`simd128` Negates a 128-bit vectors intepreted as four 32-bit signed integers
i32x4_replace_lane⚠ | Experimental`simd128` Replaces a lane from a 128-bit vector interpreted as 4 packed i32 numbers.
i32x4_shl⚠ | Experimental`simd128` Shifts each lane to the left by the specified number of bits.
i32x4_shr_s⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, sign extending.
i32x4_shr_u⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, shifting in zeros.
i32x4_splat⚠ | Experimental`simd128` Creates a vector with identical lanes.
i32x4_sub⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed four 32-bit integers.
i32x4_trunc_sat_f32x4_s⚠ | Experimental`simd128` Converts a 128-bit vector interpreted as four 32-bit floating point numbers into a 128-bit vector of four 32-bit signed integers.
i32x4_trunc_sat_f32x4_u⚠ | Experimental`simd128` Converts a 128-bit vector interpreted as four 32-bit floating point numbers into a 128-bit vector of four 32-bit unsigned integers.
i32x4_widen_high_i16x8_s⚠ | Experimental Converts high half of the smaller lane vector to a larger lane vector, sign extended.
i32x4_widen_high_i16x8_u⚠ | Experimental Converts high half of the smaller lane vector to a larger lane vector, zero extended.
i32x4_widen_low_i16x8_s⚠ | Experimental Converts low half of the smaller lane vector to a larger lane vector, sign extended.
i32x4_widen_low_i16x8_u⚠ | Experimental Converts low half of the smaller lane vector to a larger lane vector, zero extended.
i64x2_add⚠ | Experimental`simd128` Adds two 128-bit vectors as if they were two packed two 64-bit integers.
i64x2_const⚠ | Experimental`simd128` Materializes a constant SIMD value from the immediate operands.
i64x2_extract_lane⚠ | Experimental`simd128` Extracts a lane from a 128-bit vector interpreted as 2 packed i64 numbers.
i64x2_load32x2_s⚠ | Experimental`simd128` Load two 32-bit integers and sign extend each one to a 64-bit lane
i64x2_load32x2_u⚠ | Experimental`simd128` Load two 32-bit integers and zero extend each one to a 64-bit lane
i64x2_mul⚠ | Experimental`simd128` Multiplies two 128-bit vectors as if they were two packed two 64-bit integers.
i64x2_neg⚠ | Experimental`simd128` Negates a 128-bit vectors intepreted as two 64-bit signed integers
i64x2_replace_lane⚠ | Experimental`simd128` Replaces a lane from a 128-bit vector interpreted as 2 packed i64 numbers.
i64x2_shl⚠ | Experimental`simd128` Shifts each lane to the left by the specified number of bits.
i64x2_shr_s⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, sign extending.
i64x2_shr_u⚠ | Experimental`simd128` Shifts each lane to the right by the specified number of bits, shifting in zeros.
i64x2_splat⚠ | Experimental`simd128` Creates a vector with identical lanes.
i64x2_sub⚠ | Experimental`simd128` Subtracts two 128-bit vectors as if they were two packed two 64-bit integers.
memory_atomic_notify⚠ | Experimental Corresponding intrinsic to wasm's `memory.atomic.notify` instruction
memory_atomic_wait32⚠ | Experimental Corresponding intrinsic to wasm's `memory.atomic.wait32` instruction
memory_atomic_wait64⚠ | Experimental Corresponding intrinsic to wasm's `memory.atomic.wait64` instruction
v8x16_load_splat⚠ | Experimental`simd128` Load a single element and splat to all lanes of a v128 vector.
v8x16_shuffle⚠ | Experimental`simd128` Returns a new vector with lanes selected from the lanes of the two input vectors `$a` and `$b` specified in the 16 immediate operands.
v8x16_swizzle⚠ | Experimental`simd128` Returns a new vector with lanes selected from the lanes of the first input vector `a` specified in the second input vector `s`.
v16x8_load_splat⚠ | Experimental`simd128` Load a single element and splat to all lanes of a v128 vector.
v16x8_shuffle⚠ | Experimental`simd128` Same as `v8x16_shuffle`, except operates as if the inputs were eight 16-bit integers, only taking 8 indices to shuffle.
v32x4_load_splat⚠ | Experimental`simd128` Load a single element and splat to all lanes of a v128 vector.
v32x4_shuffle⚠ | Experimental`simd128` Same as `v8x16_shuffle`, except operates as if the inputs were four 32-bit integers, only taking 4 indices to shuffle.
v64x2_load_splat⚠ | Experimental`simd128` Load a single element and splat to all lanes of a v128 vector.
v64x2_shuffle⚠ | Experimental`simd128` Same as `v8x16_shuffle`, except operates as if the inputs were two 64-bit integers, only taking 2 indices to shuffle.
v128_and⚠ | Experimental`simd128` Performs a bitwise and of the two input 128-bit vectors, returning the resulting vector.
v128_andnot⚠ | Experimental`simd128` Bitwise AND of bits of `a` and the logical inverse of bits of `b`.
v128_bitselect⚠ | Experimental`simd128` Use the bitmask in `c` to select bits from `v1` when 1 and `v2` when 0.
v128_load⚠ | Experimental`simd128` Loads a `v128` vector from the given heap address.
v128_not⚠ | Experimental`simd128` Flips each bit of the 128-bit input vector.
v128_or⚠ | Experimental`simd128` Performs a bitwise or of the two input 128-bit vectors, returning the resulting vector.
v128_store⚠ | Experimental`simd128` Stores a `v128` vector to the given heap address.
v128_xor⚠ | Experimental`simd128` Performs a bitwise xor of the two input 128-bit vectors, returning the resulting vector.
memory_grow | Corresponding intrinsic to wasm's `memory.grow` instruction
memory_size | Corresponding intrinsic to wasm's `memory.size` instruction
unreachable⚠ | Generates the trap instruction `UNREACHABLE`