Re: [PATCH] MIPS: MIPS32r2 FP reciprocal instruction set support

2013-11-20 Thread Richard Sandiford
"Maciej W. Rozycki" writes: > On Sat, 16 Nov 2013, Richard Sandiford wrote: > >> > Index: gcc-fsf-trunk-quilt/gcc/config/mips/mips.h >> > === >> > --- gcc-fsf-trunk-quilt.orig/gcc/config/mips/mips.h2013-11-12 >> > 15:31:46.75

Re: [PATCH] MIPS: MIPS32r2 FP reciprocal instruction set support

2013-11-20 Thread Maciej W. Rozycki
On Sat, 16 Nov 2013, Richard Sandiford wrote: > > Index: gcc-fsf-trunk-quilt/gcc/config/mips/mips.h > > === > > --- gcc-fsf-trunk-quilt.orig/gcc/config/mips/mips.h 2013-11-12 > > 15:31:46.758734464 + > > +++ gcc-fsf-trunk-quilt/g

Re: [PATCH] MIPS: MIPS32r2 FP reciprocal instruction set support

2013-11-16 Thread Richard Sandiford
"Maciej W. Rozycki" writes: > Note that these instructions were allowed in either FPU mode in the MIPS > IV ISA, but for forward ISA compatibility this change does not enable them > for -march=mips4 in the 32-bit FPR mode because the original revision of > the MIPS64 ISA did not support it. Y

[PATCH] MIPS: MIPS32r2 FP reciprocal instruction set support

2013-11-14 Thread Maciej W. Rozycki
Hi, Complementing the recent change to enable FP MADD instructions on MIPS32r2 processors in the 32-bit FPR mode (CP0.Status.FR=0) here's one to enable FP reciprocal instructions (RECIP.fmt and RSQRT.fmt) in that case as well. Architecture documents have been amended to make it unambiguous t