5180d2d9c3
This moves to a new end-user API under the root package `wazero`. This
simplifies call sites while hardening function calls to their known
return value. Most importantly, this moves most logic internal, as
noted in the RATIONALE.md.
Ex.
```go
// Read WebAssembly binary containing an exported "fac" function.
source, _ := os.ReadFile("./tests/engine/testdata/fac.wasm")
// Decode the binary as WebAssembly module.
mod, _ := wazero.DecodeModuleBinary(source)
// Initialize the execution environment called "store" with Interpreter-based engine.
store := wazero.NewStore()
// Instantiate the module, which returns its exported functions
functions, _ := store.Instantiate(mod)
// Get the factorial function
fac, _ := functions.GetFunctionI64Return("fac")
// Discover 7! is 5040
fmt.Println(fac(context.Background(), 7))
```
PS I changed the README to factorial because the wat version of
fibonacci is not consistent with the TinyGo one!
Signed-off-by: Adrian Cole <adrian@tetrate.io>
Co-authored-by: Takaya Saeki <takaya@tetrate.io>
Co-authored-by: Takeshi Yoneda <takeshi@tetrate.io>
51 lines
1.2 KiB
Go
51 lines
1.2 KiB
Go
package internal
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import "math"
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// math.Min doen't comply with the Wasm spec, so we borrow from the original
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// with a change that either one of NaN results in NaN even if another is -Inf.
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// https://github.com/golang/go/blob/1d20a362d0ca4898d77865e314ef6f73582daef0/src/math/dim.go#L74-L91
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//
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// Exported to be used in JIT compiler test.
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func WasmCompatMin(x, y float64) float64 {
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switch {
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case math.IsNaN(x) || math.IsNaN(y):
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return math.NaN()
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case math.IsInf(x, -1) || math.IsInf(y, -1):
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return math.Inf(-1)
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case x == 0 && x == y:
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if math.Signbit(x) {
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return x
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}
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return y
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}
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if x < y {
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return x
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}
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return y
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}
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// math.Max doen't comply with the Wasm spec, so we borrow from the original
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// with a change that either one of NaN results in NaN even if another is Inf.
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// https://github.com/golang/go/blob/1d20a362d0ca4898d77865e314ef6f73582daef0/src/math/dim.go#L42-L59
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//
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// Exported to be used in JIT compiler test.
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func WasmCompatMax(x, y float64) float64 {
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switch {
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case math.IsNaN(x) || math.IsNaN(y):
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return math.NaN()
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case math.IsInf(x, 1) || math.IsInf(y, 1):
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return math.Inf(1)
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case x == 0 && x == y:
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if math.Signbit(x) {
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return y
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}
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return x
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}
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if x > y {
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return x
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}
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return y
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}
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