diff --git a/arch/arm/src/armv7-a/arm_fpucmp.c b/arch/arm/src/armv7-a/arm_fpucmp.c
index 6bf2dbca3f..00ee4ccafe 100644
--- a/arch/arm/src/armv7-a/arm_fpucmp.c
+++ b/arch/arm/src/armv7-a/arm_fpucmp.c
@@ -44,7 +44,14 @@
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ****************************************************************************/
 
diff --git a/arch/arm/src/armv7-m/arm_fpucmp.c b/arch/arm/src/armv7-m/arm_fpucmp.c
index 5ddc18e89b..dfed405645 100644
--- a/arch/arm/src/armv7-m/arm_fpucmp.c
+++ b/arch/arm/src/armv7-m/arm_fpucmp.c
@@ -44,7 +44,14 @@
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ****************************************************************************/
 
diff --git a/arch/arm/src/armv7-r/arm_fpucmp.c b/arch/arm/src/armv7-r/arm_fpucmp.c
index e37ee256da..bcc6ecb203 100644
--- a/arch/arm/src/armv7-r/arm_fpucmp.c
+++ b/arch/arm/src/armv7-r/arm_fpucmp.c
@@ -44,7 +44,14 @@
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ****************************************************************************/
 
diff --git a/arch/arm/src/armv8-m/arm_fpucmp.c b/arch/arm/src/armv8-m/arm_fpucmp.c
index 08b2da7f94..4c5e3bb2d3 100644
--- a/arch/arm/src/armv8-m/arm_fpucmp.c
+++ b/arch/arm/src/armv8-m/arm_fpucmp.c
@@ -44,7 +44,14 @@
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ****************************************************************************/
 
diff --git a/arch/arm64/src/common/arm64_fpu.c b/arch/arm64/src/common/arm64_fpu.c
index 1516268359..9e6a43f5a1 100644
--- a/arch/arm64/src/common/arm64_fpu.c
+++ b/arch/arm64/src/common/arm64_fpu.c
@@ -229,7 +229,14 @@ void arm64_fpu_disable(void)
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ***************************************************************************/
 
diff --git a/arch/risc-v/src/common/riscv_fpucmp.c b/arch/risc-v/src/common/riscv_fpucmp.c
index d37faefe91..f0c209216b 100644
--- a/arch/risc-v/src/common/riscv_fpucmp.c
+++ b/arch/risc-v/src/common/riscv_fpucmp.c
@@ -44,7 +44,14 @@
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ****************************************************************************/
 
diff --git a/arch/xtensa/src/common/xtensa_fpucmp.c b/arch/xtensa/src/common/xtensa_fpucmp.c
index e466917991..c4aaa09b22 100644
--- a/arch/xtensa/src/common/xtensa_fpucmp.c
+++ b/arch/xtensa/src/common/xtensa_fpucmp.c
@@ -44,7 +44,14 @@
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ****************************************************************************/
 
diff --git a/include/nuttx/arch.h b/include/nuttx/arch.h
index e8272c5385..431d34122c 100644
--- a/include/nuttx/arch.h
+++ b/include/nuttx/arch.h
@@ -2594,7 +2594,14 @@ int up_saveusercontext(FAR void *saveregs);
  * Name: up_fpucmp
  *
  * Description:
- *   compare FPU areas from thread context
+ *   Compare FPU areas from thread context.
+ *
+ * Input Parameters:
+ *   saveregs1 - Pointer to the saved FPU registers.
+ *   saveregs2 - Pointer to the saved FPU registers.
+ *
+ * Returned Value:
+ *   True if FPU areas compare equal, False otherwise.
  *
  ****************************************************************************/