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How to add an GCC parameter?
- From: "Joseph" <jospehchan at yahoo dot com dot tw>
- To: <gcc-help at gcc dot gnu dot org>
- Date: Tue, 20 Aug 2002 10:14:54 +0800
- Subject: How to add an GCC parameter?
Hi,
I've checked the i386.c file.
But I am curious about something as follows.
1. "large" insn
2. MOVE_RATIO
3. cost for loading QImode using movzbl
Does anybody know what those mean?
Any help is appreciateed.
Best Regards,
Joseph
A part in the i386.c file
struct processor_costs pentiumpro_cost = {
1, /* cost of an add instruction */
........
8, /* "large" insn */
6, /* MOVE_RATIO */
2, /* cost for loading QImode using movzbl */
.......
32, /* size of prefetch block */
6, /* number of parallel prefetches */
};
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