diff --git a/Marlin/src/HAL/HAL_LPC1768/WInterrupts.cpp b/Marlin/src/HAL/HAL_LPC1768/WInterrupts.cpp
index 1c73db03c1..80de9f3697 100644
--- a/Marlin/src/HAL/HAL_LPC1768/WInterrupts.cpp
+++ b/Marlin/src/HAL/HAL_LPC1768/WInterrupts.cpp
@@ -130,8 +130,8 @@ extern "C" void GpioDisableInt(const uint32_t port, const uint32_t pin) {
   }
 }
 
-bool isPowerOf2(unsigned int n) {
-  return n == 1 || (n & (n - 1)) == 0;
+constexpr bool isPowerOf2(const uint16_t n) {
+  return IS_POWER_OF_2(n);
 }
 
 #if 0
diff --git a/Marlin/src/HAL/HAL_STM32F7/HAL_STM32F7.h b/Marlin/src/HAL/HAL_STM32F7/HAL_STM32F7.h
index 03ab69a1ed..814c21096f 100644
--- a/Marlin/src/HAL/HAL_STM32F7/HAL_STM32F7.h
+++ b/Marlin/src/HAL/HAL_STM32F7/HAL_STM32F7.h
@@ -98,7 +98,7 @@
   #define NUM_SERIAL 1
 #endif
 
-#define _BV(b) (1UL << (b))
+#define _BV(b) (1 << (b))
 
 /**
  * TODO: review this to return 1 for pins that are not analog input
diff --git a/Marlin/src/HAL/HAL_STM32F7/fastio_STM32F7.h b/Marlin/src/HAL/HAL_STM32F7/fastio_STM32F7.h
index e22acc6670..dd8ca1e579 100644
--- a/Marlin/src/HAL/HAL_STM32F7/fastio_STM32F7.h
+++ b/Marlin/src/HAL/HAL_STM32F7/fastio_STM32F7.h
@@ -29,7 +29,7 @@
 #ifndef _FASTIO_STM32F7_H
 #define _FASTIO_STM32F7_H
 
-#define _BV(b) (1UL << (b))
+#define _BV(b) (1 << (b))
 
 #define READ(IO)              digitalRead(IO)
 #define WRITE(IO, v)          digitalWrite(IO,v)
diff --git a/Marlin/src/core/macros.h b/Marlin/src/core/macros.h
index 945233a457..342b702d76 100644
--- a/Marlin/src/core/macros.h
+++ b/Marlin/src/core/macros.h
@@ -95,13 +95,18 @@
 #define STRINGIFY(M) STRINGIFY_(M)
 
 // Macros for bit masks
-#undef _BV // Marlin needs 32-bit unsigned!
-#define _BV(b) (1UL << (b))
-#define TEST(n,b) (((n)&_BV(b))!=0)
+#undef _BV
+#define _BV(b) (1<<(b))
+#define TEST(n,b) !!((n)&_BV(b))
 #define SBI(n,b) (n |= _BV(b))
 #define CBI(n,b) (n &= ~_BV(b))
 #define SET_BIT(n,b,value) (n) ^= ((-value)^(n)) & (_BV(b))
 
+#define _BV32(b) (1UL << (b))
+#define TEST32(n,b) !!((n)&_BV32(b))
+#define SBI32(n,b) (n |= _BV32(b))
+#define CBI32(n,b) (n &= ~_BV32(b))
+
 // Macros for maths shortcuts
 #ifndef M_PI
   #define M_PI 3.14159265358979323846
diff --git a/Marlin/src/gcode/parser.h b/Marlin/src/gcode/parser.h
index 8d5582a4e4..d4bd897fba 100644
--- a/Marlin/src/gcode/parser.h
+++ b/Marlin/src/gcode/parser.h
@@ -108,7 +108,7 @@ public:
     static void set(const char c, char * const ptr) {
       const uint8_t ind = LETTER_BIT(c);
       if (ind >= COUNT(param)) return;           // Only A-Z
-      SBI(codebits, ind);                        // parameter exists
+      SBI32(codebits, ind);                      // parameter exists
       param[ind] = ptr ? ptr - command_ptr : 0;  // parameter offset or 0
       #if ENABLED(DEBUG_GCODE_PARSER)
         if (codenum == 800) {
@@ -125,7 +125,7 @@ public:
     static bool seen(const char c) {
       const uint8_t ind = LETTER_BIT(c);
       if (ind >= COUNT(param)) return false; // Only A-Z
-      const bool b = TEST(codebits, ind);
+      const bool b = TEST32(codebits, ind);
       if (b) {
         char * const ptr = command_ptr + param[ind];
         value_ptr = param[ind] && valid_float(ptr) ? ptr : (char*)NULL;
@@ -135,7 +135,7 @@ public:
 
     static bool seen_any() { return !!codebits; }
 
-    #define SEEN_TEST(L) TEST(codebits, LETTER_BIT(L))
+    #define SEEN_TEST(L) TEST32(codebits, LETTER_BIT(L))
 
   #else // !FASTER_GCODE_PARSER