1 files changed, 116 insertions, 0 deletions
diff --git a/cpu/cpu-byteorder.c b/cpu/cpu-byteorder.c
new file mode 100644
index 0000000..ebc612a
--- /dev/null
+++ b/cpu/cpu-byteorder.c
@@ -0,0 +1,116 @@
+/***************************************************************
+  __CPU_BYTEORDER.C
+
+       Byte-order accessors for canonical PROGRAM fields and
+       architectural data-object representation.
+
+       PART OF : CPU - library .
+
+       Copyright (C) 2026  by Andrew V.Kosteltsev.
+       All Rights Reserved.
+ ***************************************************************/
+
+#include <string.h>
+#include <libmcpu.h>
+
+__mpu_uint16_t
+__cpu_data_get_u16( const __mpu_UNIT_t *p )
+{
+  __mpu_uint16_t v = 0;
+  if( p ) memcpy( &v, p, sizeof(v) );
+  return( v );
+}
+
+__mpu_uint32_t
+__cpu_data_get_u32( const __mpu_UNIT_t *p )
+{
+  __mpu_uint32_t v = 0;
+  if( p ) memcpy( &v, p, sizeof(v) );
+  return( v );
+}
+
+__mpu_uint64_t
+__cpu_data_get_u64( const __mpu_UNIT_t *p )
+{
+  __mpu_uint64_t v = 0;
+  if( p ) memcpy( &v, p, sizeof(v) );
+  return( v );
+}
+
+void
+__cpu_data_put_u16( __mpu_UNIT_t *p, __mpu_uint16_t v )
+{
+  if( p ) memcpy( p, &v, sizeof(v) );
+}
+
+void
+__cpu_data_put_u32( __mpu_UNIT_t *p, __mpu_uint32_t v )
+{
+  if( p ) memcpy( p, &v, sizeof(v) );
+}
+
+void
+__cpu_data_put_u64( __mpu_UNIT_t *p, __mpu_uint64_t v )
+{
+  if( p ) memcpy( p, &v, sizeof(v) );
+}
+
+__mpu_uint16_t
+__cpu_code_get_u16( const __mpu_UNIT_t *p )
+{
+  if( !p ) return( 0 );
+  return (__mpu_uint16_t)(((__mpu_uint16_t)p[0] << 8) |
+                           (__mpu_uint16_t)p[1]);
+}
+
+__mpu_uint32_t
+__cpu_code_get_u32( const __mpu_UNIT_t *p )
+{
+  __mpu_uint32_t v;
+  if( !p ) return( 0 );
+  v  = ((__mpu_uint32_t)p[0] << 24);
+  v |= ((__mpu_uint32_t)p[1] << 16);
+  v |= ((__mpu_uint32_t)p[2] << 8);
+  v |=  (__mpu_uint32_t)p[3];
+  return( v );
+}
+
+__mpu_uint64_t
+__cpu_code_get_u64( const __mpu_UNIT_t *p )
+{
+  __mpu_uint64_t v = 0;
+  int k;
+  if( !p ) return( 0 );
+  for( k = 0; k < 8; ++k ) v = ( v << 8 ) | p[k];
+  return( v );
+}
+
+void
+__cpu_code_put_u16( __mpu_UNIT_t *p, __mpu_uint16_t v )
+{
+  if( !p ) return;
+  p[0] = (__mpu_UNIT_t)(v >> 8);
+  p[1] = (__mpu_UNIT_t)v;
+}
+
+void
+__cpu_code_put_u32( __mpu_UNIT_t *p, __mpu_uint32_t v )
+{
+  if( !p ) return;
+  p[0] = (__mpu_UNIT_t)(v >> 24);
+  p[1] = (__mpu_UNIT_t)(v >> 16);
+  p[2] = (__mpu_UNIT_t)(v >> 8);
+  p[3] = (__mpu_UNIT_t)v;
+}
+
+void
+__cpu_code_put_u64( __mpu_UNIT_t *p, __mpu_uint64_t v )
+{
+  int k;
+  if( !p ) return;
+  for( k = 7; k >= 0; --k )
+  {
+    p[k] = (__mpu_UNIT_t)( v & __mpu_UINT64_C( 0xff ) );
+    v >>= 8;
+  }
+}