fix: clear garbage bits before cast short integer to float

src/compiler.ts

@@ -3648,42 +3648,28 @@ export class Compiler extends DiagnosticEmitter {
     // int to float
     } else if (fromType.isIntegerValue && toType.isFloatValue) {
 
+      if (fromType.isShortIntegerValue) expr = this.ensureSmallIntegerWrap(expr, fromType); // must clear garbage bits
+      let op: UnaryOp;
       // int to f32
       if (toType.kind == TypeKind.F32) {
         if (fromType.isLongIntegerValue) {
-          expr = module.unary(
-            fromType.isSignedIntegerValue
-              ? UnaryOp.ConvertI64ToF32
-              : UnaryOp.ConvertU64ToF32,
-            expr
-          );
+          if (fromType.isSignedIntegerValue) op = UnaryOp.ConvertI64ToF32;
+          else op = UnaryOp.ConvertU64ToF32;
         } else {
-          expr = module.unary(
-            fromType.isSignedIntegerValue
-              ? UnaryOp.ConvertI32ToF32
-              : UnaryOp.ConvertU32ToF32,
-            expr
-          );
+          if (fromType.isSignedIntegerValue) op = UnaryOp.ConvertI32ToF32;
+          else op = UnaryOp.ConvertU32ToF32;
         }
-
       // int to f64
       } else {
         if (fromType.isLongIntegerValue) {
-          expr = module.unary(
-            fromType.isSignedIntegerValue
-              ? UnaryOp.ConvertI64ToF64
-              : UnaryOp.ConvertU64ToF64,
-            expr
-          );
+          if (fromType.isSignedIntegerValue) op = UnaryOp.ConvertI64ToF64;
+          else op = UnaryOp.ConvertU64ToF64;
         } else {
-          expr = module.unary(
-            fromType.isSignedIntegerValue
-              ? UnaryOp.ConvertI32ToF64
-              : UnaryOp.ConvertU32ToF64,
-            expr
-          );
+          if (fromType.isSignedIntegerValue) op = UnaryOp.ConvertI32ToF64;
+          else op = UnaryOp.ConvertU32ToF64;
         }
       }
+      expr = module.unary(op, expr);
 
     // v128 to bool
     } else if (fromType == Type.v128 && toType.isBooleanValue) {

tests/compiler/number-convert.debug.wat

@@ -0,0 +1,157 @@
+(module
+ (type $0 (func))
+ (global $~lib/memory/__data_end i32 (i32.const 8))
+ (global $~lib/memory/__stack_pointer (mut i32) (i32.const 32776))
+ (global $~lib/memory/__heap_base i32 (i32.const 32776))
+ (memory $0 0)
+ (table $0 1 1 funcref)
+ (elem $0 (i32.const 1))
+ (export "memory" (memory $0))
+ (start $~start)
+ (func $start:number-convert
+  i32.const 1
+  f32.convert_i32_u
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 255
+  f32.convert_i32_u
+  f32.const 255
+  f32.eq
+  drop
+  i32.const 256
+  i32.const 255
+  i32.and
+  f32.convert_i32_u
+  f32.const 0
+  f32.eq
+  drop
+  i32.const 257
+  i32.const 255
+  i32.and
+  f32.convert_i32_u
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 1
+  f32.convert_i32_s
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 255
+  i32.extend8_s
+  f32.convert_i32_s
+  f32.const -1
+  f32.eq
+  drop
+  i32.const 256
+  i32.extend8_s
+  f32.convert_i32_s
+  f32.const 0
+  f32.eq
+  drop
+  i32.const 257
+  i32.extend8_s
+  f32.convert_i32_s
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 1
+  f32.convert_i32_u
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 65535
+  f32.convert_i32_u
+  f32.const 65535
+  f32.eq
+  drop
+  i32.const 65536
+  i32.const 65535
+  i32.and
+  f32.convert_i32_u
+  f32.const 0
+  f32.eq
+  drop
+  i32.const 65537
+  i32.const 65535
+  i32.and
+  f32.convert_i32_u
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 1
+  f32.convert_i32_s
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 65535
+  i32.extend16_s
+  f32.convert_i32_s
+  f32.const -1
+  f32.eq
+  drop
+  i32.const 65536
+  i32.extend16_s
+  f32.convert_i32_s
+  f32.const 0
+  f32.eq
+  drop
+  i32.const 65537
+  i32.extend16_s
+  f32.convert_i32_s
+  f32.const 1
+  f32.eq
+  drop
+  i32.const 1
+  f64.convert_i32_u
+  f64.const 1
+  f64.eq
+  drop
+  i32.const 255
+  f64.convert_i32_u
+  f64.const 255
+  f64.eq
+  drop
+  i32.const 256
+  i32.const 255
+  i32.and
+  f64.convert_i32_u
+  f64.const 0
+  f64.eq
+  drop
+  i32.const 257
+  i32.const 255
+  i32.and
+  f64.convert_i32_u
+  f64.const 1
+  f64.eq
+  drop
+  i32.const 1
+  f64.convert_i32_s
+  f64.const 1
+  f64.eq
+  drop
+  i32.const 255
+  i32.extend8_s
+  f64.convert_i32_s
+  f64.const -1
+  f64.eq
+  drop
+  i32.const 256
+  i32.extend8_s
+  f64.convert_i32_s
+  f64.const 0
+  f64.eq
+  drop
+  i32.const 257
+  i32.extend8_s
+  f64.convert_i32_s
+  f64.const 1
+  f64.eq
+  drop
+ )
+ (func $~start
+  call $start:number-convert
+ )
+)

tests/compiler/number-convert.json

@@ -0,0 +1,4 @@
+{
+  "asc_flags": [
+  ]
+}

tests/compiler/number-convert.release.wat

@@ -0,0 +1,4 @@
+(module
+ (memory $0 0)
+ (export "memory" (memory $0))
+)

tests/compiler/number-convert.ts

@@ -0,0 +1,29 @@
+assert(<f32><u8>(1) == 1);
+assert(<f32><u8>(255) == 255);
+assert(<f32><u8>(256) == 0);
+assert(<f32><u8>(257) == <f32>1);
+
+assert(<f32><i8>(1) == <f32>1);
+assert(<f32><i8>(255) == <f32>-1);
+assert(<f32><i8>(256) == <f32>0);
+assert(<f32><i8>(257) == <f32>1);
+
+assert(<f32><u16>(1) == <f32>1);
+assert(<f32><u16>(65535) == <f32>65535);
+assert(<f32><u16>(65536) == <f32>0);
+assert(<f32><u16>(65537) == <f32>1);
+
+assert(<f32><i16>(1) == <f32>1);
+assert(<f32><i16>(65535) == <f32>-1);
+assert(<f32><i16>(65536) == <f32>0);
+assert(<f32><i16>(65537) == <f32>1);
+
+assert(<f64><u8>(1) == <f64>1);
+assert(<f64><u8>(255) == <f64>255);
+assert(<f64><u8>(256) == <f64>0);
+assert(<f64><u8>(257) == <f64>1);
+
+assert(<f64><i8>(1) == <f64>1);
+assert(<f64><i8>(255) == <f64>-1);
+assert(<f64><i8>(256) == <f64>0);
+assert(<f64><i8>(257) == <f64>1);