From 48e2d6e8f969c2359a90d52d7a76d6076014abf7 Mon Sep 17 00:00:00 2001
From: Hauke Petersen <hauke.petersen@fu-berlin.de>
Date: Wed, 6 Mar 2019 18:03:09 +0100
Subject: [PATCH] cpu/atmega_common: implement irq_is_enabled()

---
 cpu/avr8_common/include/irq_arch.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/cpu/avr8_common/include/irq_arch.h b/cpu/avr8_common/include/irq_arch.h
index 5287a9c251..1c8261a46e 100644
--- a/cpu/avr8_common/include/irq_arch.h
+++ b/cpu/avr8_common/include/irq_arch.h
@@ -103,6 +103,21 @@ __attribute__((always_inline)) static inline int irq_is_in(void)
     return (state & AVR8_STATE_FLAG_ISR);
 }
 
+/**
+ * @brief Test if interrupts are currently enabled
+ */
+__attribute__((always_inline)) static inline int irq_is_enabled(void)
+{
+    uint8_t mask;
+    __asm__ volatile(
+        "in %[dest], __SREG__"      "\n\t"
+        : [dest]    "=r"(mask)
+        : /* no inputs */
+        : "memory"
+    );
+    return mask & (1 << 7);
+}
+
 #ifdef __cplusplus
 }
 #endif