kmath-memory/src/commonMain/kotlin/space/kscience/kmath/memory/Memory.kt

@@ -56,6 +56,8 @@ public interface MemoryReader {
 
     /**
      * Reads [Float] at certain [offset].
+     *
+     * **Warning: since JS can't handle Float properly, the size of segment read by this function is 8 bytes.**
      */
     public fun readFloat(offset: Int): Float
 
@@ -112,6 +114,8 @@ public interface MemoryWriter {
 
     /**
      * Writes [Float] at certain [offset].
+     *
+     * **Warning: since JS can't handle Float properly, the size of segment written by this function is 8 bytes.**
      */
     public fun writeFloat(offset: Int, value: Float)
 

kmath-memory/src/commonTest/kotlin/kscience/kmath/memory/MemoryTest.kt

@@ -54,20 +54,15 @@ internal class MemoryTest {
     fun rwFloat() {
         val mem = Memory.allocate(64)
         mem.write { writeFloat(0, 12.12345f) }
-        println(1)
-        assertEquals(12.12345027923584, mem.read { readFloat(0) }.toDouble())
-        mem.write { writeFloat(4, -313.13f) }
-        println(2)
-        assertEquals(-313.1300048828125, mem.read { readFloat(4) }.toDouble())
-        mem.write { writeFloat(8, Float.NaN) }
-        println(3)
-        assertEquals(Float.NaN, mem.read { readFloat(8) })
-        mem.write { writeFloat(12, Float.POSITIVE_INFINITY) }
-        println(4)
-        assertEquals(Float.POSITIVE_INFINITY, mem.read { readFloat(12) })
-        mem.write { writeFloat(12, Float.NEGATIVE_INFINITY) }
-        println(5)
-        assertEquals(Float.NEGATIVE_INFINITY, mem.read { readFloat(12) })
+        assertEquals(12.12345f, mem.read { readFloat(0) })
+        mem.write { writeFloat(8, -313.13f) }
+        assertEquals(-313.13f, mem.read { readFloat(8) })
+        mem.write { writeFloat(16, Float.NaN) }
+        assertEquals(Float.NaN, mem.read { readFloat(16) })
+        mem.write { writeFloat(24, Float.POSITIVE_INFINITY) }
+        assertEquals(Float.POSITIVE_INFINITY, mem.read { readFloat(24) })
+        mem.write { writeFloat(32, Float.NEGATIVE_INFINITY) }
+        assertEquals(Float.NEGATIVE_INFINITY, mem.read { readFloat(32) })
     }
 
     @Test

kmath-memory/src/jsMain/kotlin/space/kscience/kmath/memory/DataViewMemory.kt

@@ -30,7 +30,7 @@ private class DataViewMemory(val view: DataView) : Memory {
 
         override fun readDouble(offset: Int): Double = view.getFloat64(offset, true)
 
-        override fun readFloat(offset: Int): Float = view.getFloat32(offset, true)
+        override fun readFloat(offset: Int): Float = view.getFloat64(offset, true).toFloat()
 
         override fun readByte(offset: Int): Byte = view.getInt8(offset)
 
@@ -56,7 +56,7 @@ private class DataViewMemory(val view: DataView) : Memory {
         }
 
         override fun writeFloat(offset: Int, value: Float) {
-            view.setFloat32(offset, value, true)
+            view.setFloat64(offset, value.toDouble(), true)
         }
 
         override fun writeByte(offset: Int, value: Byte) {

kmath-memory/src/jvmMain/kotlin/space/kscience/kmath/memory/ByteBufferMemory.kt

@@ -44,7 +44,7 @@ internal class ByteBufferMemory(
 
         override fun readDouble(offset: Int) = buffer.getDouble(position(offset))
 
-        override fun readFloat(offset: Int) = buffer.getFloat(position(offset))
+        override fun readFloat(offset: Int) = buffer.getDouble(position(offset)).toFloat()
 
         override fun readByte(offset: Int) = buffer.get(position(offset))
 
@@ -69,7 +69,7 @@ internal class ByteBufferMemory(
         }
 
         override fun writeFloat(offset: Int, value: Float) {
-            buffer.putFloat(position(offset), value)
+            buffer.putDouble(position(offset), value.toDouble())
         }
 
         override fun writeByte(offset: Int, value: Byte) {

kmath-memory/src/nativeMain/kotlin/space/kscience/kmath/memory/NativeMemory.kt

@@ -31,7 +31,7 @@ internal class NativeMemory(
 
         override fun readDouble(offset: Int) = array.getDoubleAt(position(offset))
 
-        override fun readFloat(offset: Int) = array.getFloatAt(position(offset))
+        override fun readFloat(offset: Int) = array.getDoubleAt(position(offset)).toFloat()
 
         override fun readByte(offset: Int) = array[position(offset)]
 
@@ -56,7 +56,7 @@ internal class NativeMemory(
         }
 
         override fun writeFloat(offset: Int, value: Float) {
-            array.setFloatAt(position(offset), value)
+            array.setDoubleAt(position(offset), value.toDouble())
         }
 
         override fun writeByte(offset: Int, value: Byte) {