Use a more straightforward algorithm for mulc on 32-bit architectures. (Fixes #11321)
Use a more straightforward algorithm for mulc on 32-bit architectures. (Fixes #11321)

It has the added advantage of performing 6 less 64-bit operations per
long multiplication.

gares/coq,silene/coq,SkySkimmer/coq,silene/coq,coq/coq,Matafou/coq,coq/coq,JasonGross/coq,JasonGross/coq,Zimmi48/coq,Zimmi48/coq,Matafou/coq,SkySkimmer/coq,ejgallego/coq,gares/coq,SkySkimmer/coq,JasonGross/coq,Zimmi48/coq,gares/coq,gares/coq,silene/coq,coq/coq,coq/coq,ejgallego/coq,ejgallego/coq,Matafou/coq,gares/coq,ejgallego/coq,JasonGross/coq,Zimmi48/coq,SkySkimmer/coq