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Re: Floating-point Consistency, -ffloat-store, and x86 (mostly)
- To: burley at gnu dot org
- Subject: Re: Floating-point Consistency, -ffloat-store, and x86 (mostly)
- From: N8TM at aol dot com
- Date: Thu, 17 Dec 1998 04:29:43 EST
- Cc: hjstein at bfr dot co dot il, egcs at cygnus dot com
In a message dated 12/16/98 11:38:23 AM Pacific Standard Time, burley@gnu.org
writes:
<< Is lf90 spilling 80-bit values resulting from operations on 32-bit
operands (originally, anyway) as 32, 64, or 80 bits? >>
I don't have tools to examine lf90; lf95 has adopted a more standard format
for .obj which works with objdump. I'll do some checking on real code to
compare spills between g77 and lf95. Unfortunately, the linker misalignments
haven't been corrected in lf95. I'm not sure that I'll like the model of lf95
spilling, which may well be different from lf90, but at least I can report
some indication of how much spilling occurs in a real situation.