Add XSIMD_TARGET_RISCV

Author: AntoinePrv

include/xsimd/config/xsimd_config.hpp

@@ -464,6 +464,17 @@
 #define XSIMD_SVE_BITS 0
 #endif
 
+/**
+ * @ingroup xsimd_config_macro
+ *
+ * Set to 1 if the target is the RISC-V architecture family.
+ */
+#ifdef __riscv
+#define XSIMD_TARGET_RISCV 1
+#else
+#define XSIMD_TARGET_RISCV 0
+#endif
+
 /**
  * @ingroup xsimd_config_macro
  *