demote_f64x2_zero: Wasm SIMD conversion instruction
The demote_f64x2_zero SIMD conversion instruction converts the lanes of a v128 f64x2 value interpretation into an f32x4 value interpretation. The two higher lanes of the result are initialized to zero.
Try it
(module
(import "console" "log" (func $log (param f32)))
(func $main
v128.const f64x2 0x3 0x3a
f32x4.demote_f64x2_zero
f32x4.extract_lane 1
call $log ;; log the result
)
(start $main)
)
WebAssembly.instantiateStreaming(fetch("{%wasm-url%}"), { console });
Syntax
value_type.demote_f64x2_zero
value_type-
The type of value the instruction is being run on. The following
v128value interpretations supportdemote_f64x2_zero:f32x4
demote_f64x2_zero-
The
demote_f64x2_zeroinstruction. Must always be included after thevalue_typeand a period (.).
Type
[input] -> [output]
Binary encoding
| Instruction | Binary format | Example text => binary |
|---|---|---|
f32x4.demote_f64x2_zero |
0xfd 94:u32 |
f32x4.demote_f64x2_zero => 0xfd 0x5e |