xiaoxiang781216 commented on code in PR #7850:
URL: https://github.com/apache/nuttx/pull/7850#discussion_r1053113761
##########
libs/libc/math/lib_scalbnl.c:
##########
@@ -0,0 +1,45 @@
+/****************************************************************************
+ * libs/libc/math/lib_scalbnl.c
+ * get a long double number of x*2^n
+ *
+ * This file is copy from musl libc
+ * musl is an implementation of the C standard library built on top of the
+ * Linux system call API, including interfaces defined in the base language
+ * standard, POSIX, and widely agreed-upon extensions.
+ * musl is lightweight, fast, simple, free, and strives to be correct in
+ * the sense of standards-conformance and safety.
+ *
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <math.h>
+#include <stdint.h>
+
+/****************************************************************************
+ * Pre-processor definitions
+ ****************************************************************************/
+
+#ifdef CONFIG_HAVE_LONG_DOUBLE
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: scalbnl
+ *
+ * Description:
+ * get a long double number of x*2^n
+ *
+ ****************************************************************************/
+
+long double scalbnl(long double x, int n)
+{
+ return scalbn(x, n);
Review Comment:
it's different from musl implementation
##########
libs/libc/math/Make.defs:
##########
@@ -29,6 +29,8 @@ CSRCS += lib_powf.c lib_sinf.c lib_sinhf.c lib_sqrtf.c
lib_tanf.c
CSRCS += lib_tanhf.c lib_asinhf.c lib_acoshf.c lib_atanhf.c lib_erff.c
CSRCS += lib_copysignf.c
+CSRCS += lib_scalbnf.c lib_scalbn.c lib_scalbnl.c
Review Comment:
merge to line 30
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