[LLVMdev] RFC: Add ISD nodes for mad (original) (raw)
Matt Arsenault Matthew.Arsenault at amd.com
Wed Jan 28 17:19:24 PST 2015
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On 01/28/2015 05:15 PM, Mehdi Amini wrote:
Can’t you have “optional” parameters? I mean the number of parameter you can add to a node is never checked or defined, it is implicit from the ISD OpCode AFAIK. If you add a parameter to FMA, wouldn’t it just be ignored by the existing backends? You can have variadic nodes, but they are difficult to work with. It wouldn't be worth it for this.
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