Math Processor Unit Library

diff --git a/mpu/mpu-math-errno.h b/mpu/mpu-math-errno.h
new file mode 100644
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--- /dev/null
+++ b/mpu/mpu-math-errno.h
@@ -0,0 +1,68 @@
+
+/***************************************************************
+  __MPU_MATH_ERRNO.H
+
+       This file contains MATH ERRNO SUPPRESS operation
+       functions & data declarations.
+
+       PART OF : MPU - library .
+
+       USAGE   : Internal only .
+
+       NOTE    : Include "libmpu.h" before this FILE .
+
+       Copyright (C) 2000 - 2024  by Andrew V.Kosteltsev.
+       All Rights Reserved.
+ ***************************************************************/
+
+#ifndef   __MPU_MATH_ERRNO_H
+#define   __MPU_MATH_ERRNO_H
+
+/***************************************************************
+  Macro for perror, strerror, and _strerror
+  NOTE:
+     Unknown error is == (__mpu_char8_t *)0;
+ ***************************************************************/
+#define   __MPU_INTEGER_ERR_MSG(m) \
+          __mpu_integer_errlist[(((m)<0)||((m)>=__mpu_integer_nerr)? \
+          __mpu_integer_nerr:(m))]
+
+#define   __MPU_REAL_ERR_MSG(m) \
+          __mpu_real_errlist[(((m)<0)||((m)>=__mpu_real_nerr)? \
+          __mpu_real_nerr:(m))]
+
+#define   __MPU_COMPLEX_ERR_MSG(m) \
+          __mpu_complex_errlist[(((m)<0)||((m)>=__mpu_complex_nerr)? \
+          __mpu_complex_nerr:(m))]
+
+#define   __MPU_MATH_ERR_MSG(m) \
+          __mpu_math_errlist[(((m)<0)||((m)>=__mpu_math_nerr)? \
+          __mpu_math_nerr:(m))]
+
+
+#ifdef  __cplusplus
+extern "C" {
+#endif
+
+
+extern const __mpu_char8_t *const   __mpu_integer_errlist[];
+extern const __mpu_error_t          __mpu_integer_nerr;
+
+extern const __mpu_char8_t *const   __mpu_real_errlist[];
+extern const __mpu_error_t          __mpu_real_nerr;
+
+extern const __mpu_char8_t *const   __mpu_complex_errlist[];
+extern const __mpu_error_t          __mpu_complex_nerr;
+
+extern const __mpu_char8_t *const   __mpu_math_errlist[];
+extern const __mpu_error_t          __mpu_math_nerr;
+
+
+extern int __mpu_math_errnotab[];
+
+
+#ifdef  __cplusplus
+}   /* ... extern "C" */
+#endif
+
+#endif /* __MPU_MATH_ERRNO_H */