Expand support for int/float type casting

maximecb · Oct 1, 2023 · cdbeb79 · cdbeb79
1 parent f3f2dac
commit cdbeb79
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Showing 3 changed files with 8 additions and 2 deletions.
diff --git a/ncc/src/codegen.rs b/ncc/src/codegen.rs
@@ -511,11 +511,16 @@ impl Expr
                         }
                     }
 
+                    // Int to float
                     // float f = (float)int_val;
-                    (Float(32), Int(32)) => {
+                    (Float(32), Int(n)) if *n <= 32 => {
+                        if *n < 32 {
+                            out.push_str(&format!("sx_i{}_i32;\n", n));
+                        }
                         out.push_str("i32_to_f32;\n");
                     }
 
+                    // Float to int
                     (Int(m), Float(32)) if *m <= 32 => {
                         out.push_str("f32_to_i32;\n");
                         if *m < 32 {

diff --git a/ncc/src/types.rs b/ncc/src/types.rs
@@ -220,7 +220,7 @@ impl Expr
                     (Int(m), Int(n)) => {},
 
                     // Int/float casts
-                    (Float(32), Int(32)) => {},
+                    (Float(32), Int(n)) if *n <= 32 => {},
                     (Int(m), Float(32)) if *m <= 32 => {},
 
                     // Pointer casts

diff --git a/ncc/tests/floats.c b/ncc/tests/floats.c
@@ -16,6 +16,7 @@ int main()
     assert((short)5000.0f == 5000);
     // FIXME:
     //assert((short)-5000.0f == (short)-5000);
+    assert((float)(short)5000 == 5000.0f);
 
     // Global variable access
     assert(g == 3.5f);