Calculate power of 2

tyfkda · Jul 29, 2024 · afeb1a9 · afeb1a9
1 parent e045a55
commit afeb1a9
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Showing 2 changed files with 2 additions and 10 deletions.
diff --git a/src/cc/backend/codegen.c b/src/cc/backend/codegen.c
@@ -199,10 +199,7 @@ static enum VRegSize get_elem_vtype(const Type *type) {
   }
 
   assert(s > 0);
-  enum VRegSize vsize = VRegSize1;
-  for (; s >>= 1, s > 0; ++vsize)
-    ;
-  return vsize;
+  return most_significant_bit(s);
 }
 
 void gen_memcpy(const Type *type, VReg *dst, VReg *src) {

diff --git a/src/cc/backend/codegen_expr.c b/src/cc/backend/codegen_expr.c
@@ -24,12 +24,7 @@ enum VRegSize to_vsize(const Type *type) {
   int size = type_size(type);
   assert(1 <= size && size <= MAX_REG_SIZE && IS_POWER_OF_2(size));
   UNUSED(MAX_REG_SIZE);
-  for (enum VRegSize vsize = VRegSize1; vsize <= VRegSize8; ++vsize) {
-    if (size == 1 << vsize)
-      return vsize;
-  }
-  assert(!"Must not reached");
-  return -1;
+  return most_significant_bit(size);
 }
 
 int to_vflag(const Type *type) {