Fix thumb16 for __ARM_ASM_SYNTAX_UNIFIED__ again

Author: felixjones

source/rtc.c

@@ -145,10 +145,14 @@ static void rtc_cmd_arg(const unsigned int cmd, unsigned int data, unsigned int
 
     int wait = (TIMEOUT_CYCLES_WAIT_AFTER_WRITE_PER_BYTE * 7 + 11 + 6) / 12;
     __asm__ volatile (
-        "L1%=:"                      "\n\t"
-        "subs  %[wait], %[wait], #1" "\n\t"
+        "L1%=:"                         "\n\t"
+#if __ARM_ASM_SYNTAX_UNIFIED__  == 1
+        "subs  %[wait], %[wait], #1"    "\n\t"
+#else
+        "sub   %[wait], #1"             "\n\t"
+#endif
         "bne   L1%="
-        ::  [wait]"r"(wait)
+        : [wait]"+r"(wait)
     );
 }
 
@@ -163,10 +167,14 @@ static void rtc_cmd_arg_datetime(unsigned int cmd, __agbabi_datetime_t datetime,
 
     int wait = (TIMEOUT_CYCLES_WAIT_AFTER_WRITE_PER_BYTE * 7 + 11 + 6) / 12;
     __asm__ volatile (
-        "L1%=:"                      "\n\t"
-        "subs  %[wait], %[wait], #1" "\n\t"
+        "L1%=:"                         "\n\t"
+#if __ARM_ASM_SYNTAX_UNIFIED__  == 1
+        "subs  %[wait], %[wait], #1"    "\n\t"
+#else
+        "sub   %[wait], #1"             "\n\t"
+#endif
         "bne   L1%="
-        ::  [wait]"r"(wait)
+        : [wait]"+r"(wait)
     );
 }