tests/math: add -tags nolibc to force Go implementations of math.Exp,…

…Exp2,Log

tests/math/math_nolibc.go

@@ -0,0 +1,27 @@
+//go:build nolibc
+
+package math_test
+
+//go:export exp
+func exp(f float64) float64 {
+	return mathExp(f)
+}
+
+//go:linkname mathExp math.exp
+func mathExp(float64) float64
+
+//go:export exp2
+func exp2(f float64) float64 {
+	return mathExp(f)
+}
+
+//go:linkname mathExp2 math.exp2
+func mathExp2(float64) float64
+
+//go:export log
+func log(f float64) float64 {
+	return mathLog(f)
+}
+
+//go:linkname mathLog math.log
+func mathLog(float64) float64

tests/math/math_bench_test.go → tests/math/math_test.go

@@ -1,11 +1,10 @@
-// //go:build tinygo.wasm
-
 package math_test
 
 import (
 	"math"
 	"math/rand"
 	"testing"
+	_ "unsafe"
 )
 
 var tested float64
@@ -33,6 +32,7 @@ func BenchmarkMathCeil(b *testing.B) {
 	}
 	tested = f
 }
+
 func BenchmarkMathExp(b *testing.B) {
 	var f float64
 	for i := 0; i < b.N; i++ {