Fixup codegen

Author: DJMcNab

fearless_simd/src/generated/fallback.rs

@@ -83,7 +83,10 @@ impl Simd for Fallback {
     type mask32s = mask32x4<Self>;
     #[inline(always)]
     fn level(self) -> Level {
-        Level::baseline()
+        #[cfg(feature = "force_support_fallback")]
+        return Level::Fallback(self);
+        #[cfg(not(feature = "force_support_fallback"))]
+        Level::baseline();
     }
     #[inline]
     fn vectorize<F: FnOnce() -> R, R>(self, f: F) -> R {

fearless_simd/src/generated/sse4_2.rs

@@ -56,7 +56,6 @@ impl Simd for Sse4_2 {
         return Level::Sse4_2(self);
         #[cfg(all(target_feature = "avx2", target_feature = "fma"))]
         {
-            // TODO: Do we want to log here?
             Level::baseline()
         }
     }

fearless_simd_gen/src/mk_fallback.rs

@@ -407,7 +407,10 @@ fn mk_simd_impl() -> TokenStream {
             type mask32s = mask32x4<Self>;
             #[inline(always)]
             fn level(self) -> Level {
-                Level::#level_tok(self)
+                #[cfg(feature = "force_support_fallback")]
+                return Level::#level_tok(self);
+                #[cfg(not(feature = "force_support_fallback"))]
+                Level::baseline();
             }
 
             #[inline]

fearless_simd_gen/src/mk_sse4_2.rs

@@ -115,7 +115,12 @@ fn mk_simd_impl() -> TokenStream {
             type mask32s = mask32x4<Self>;
             #[inline(always)]
             fn level(self) -> Level {
-                Level::#level_tok(self)
+                #[cfg(not(all(target_feature = "avx2", target_feature = "fma")))]
+                return Level::#level_tok(self);
+                #[cfg(all(target_feature = "avx2", target_feature = "fma"))]
+                {
+                    Level::baseline()
+                }
             }
 
             #[inline]