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Re: Avoid explicit use of machine modes (8/n) Hook-ize INIT_TARGET_OPTABS
- From: David Edelsohn <dje at watson dot ibm dot com>
- To: "Zack Weinberg" <zack at codesourcery dot com>
- Cc: gcc-patches at gcc dot gnu dot org
- Date: Thu, 02 Oct 2003 10:26:32 -0400
- Subject: Re: Avoid explicit use of machine modes (8/n) Hook-ize INIT_TARGET_OPTABS
>>>>> Zack Weinberg writes:
Zack> Thanks. I'm already working on a successor patch to this one; I'll
Zack> make changes along these lines at the same time. (The _xlq* names
Zack> known to GCC don't cover as much ground as the _q_* names. Are there
Zack> more?)
PowerPC does not have any native IEEE quad precision instructions,
so all operations must be handled by library functions. The AIX 128-bit
extended format uses a pair of double precision floating point registers
(sometimes called double-double or high-low) allowing most operations to
be performed natively.
David