• Announcements

Archived

This topic is now archived and is closed to further replies.

Byte Alignment in VC++ 6.0

Recommended Posts

hi, i have a question concerning byte alignment. I´m programming a scripting language and my instructions should be variable-sized to keep the code small (for example, a byte-add instruction should only occupie 3 bytes, one for the byte code, and one for each of the two operands, where an longint adds would occupy 9 bytes). but the byte alignment is set by VC++ to a 8 byte boundary, to improve performance, and i have an AMD 1800XP+. Would reducing the boundary to one byte mean heavily peformance hits? I have read that the java byte code format always uses 1-byte boundary alignmemnt. Can someone give me a good advice? thanks Gammastrahler

Share on other sites
Just let your compiler do any kind of aligning it wants. Then when reading in the commands, read each operand/operator separately.
struct A {  char a;  int b;  //don''t care about alignment  char c;};ifstream in(..);A a;in >> a.a >> a.b >> a.c;

• Forum Statistics

• Total Topics
627765
• Total Posts
2978983

• 11
• 10
• 10
• 23
• 14