[libc] Add abs()

Signed-off-by: Michael Brown <mcb30@ipxe.org>

diff --git a/src/include/stdlib.h b/src/include/stdlib.h
index bca85a234e6014fa3ab2b008c6631a4bf79bcc7c..2951522b8a4581eb78eaab135b901b03c7cab223 100644 (file)
--- a/src/include/stdlib.h
+++ b/src/include/stdlib.h
@@ -93,6 +93,10 @@ static inline void srand ( unsigned int seed ) {
  ****************************************************************************
  */
 
+static inline __attribute__ (( always_inline )) int abs ( int value ) {
+       return __builtin_abs ( value );
+}
+
 extern int system ( const char *command );
 extern __asmcall int main ( void );