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Re: [PATCH], Add power9 support to GCC, patch #8 (add integer multiply/add)

This patch adds support for the MADDLD instruciton, which is a fused
multiply/add instruction for integers.  At this time, it is for 64-bit
multiplies only.  Eventually, we will restructure 128-bit multiply so that we
can use the 64x64 + 64 high bit varients.

I have bootstrapped a compiler with this change in and there were no
regressions.  Is it ok to apply to the trunk?

[gcc]
2015-11-10  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* config/rs6000/rs6000.h (TARGET_MADDLD): Add support for the ISA
	3.0 integer multiply-add instruction.
	* config/rs6000/rs6000.md (<u>mul<mode><dmode>3): Likewise.

[gcc/testsuite]
2015-11-10  Michael Meissner  <meissner@linux.vnet.ibm.com>

	* gcc.target/powerpc/maddld.c: New test.


-- 
Michael Meissner, IBM
IBM, M/S 2506R, 550 King Street, Littleton, MA 01460-6245, USA
email: meissner@linux.vnet.ibm.com, phone: +1 (978) 899-4797

Attachment: gcc-power9.official-08b
Description: Text document

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