On Fri, Jul 21, 2017 at 04:09:06PM +0200, Aleksandar Markovic wrote: > From: Aleksandar Markovic <aleksandar.marko...@imgtec.com> > > Fix the value returned by <MAXA|MINA>.<D|S>, if inputs are normal fp > numbers of the same absolute value, but opposite signs. > > The relevant example: > > MAXA.S fd,fs,ft: > If fs contains -3, and ft contains +3, fd is going to contain +3 > (without this patch, it used to contain -3).
I think its worth mentioning also that for MINA.*, it returns the negative one when the absolute values are equal (The phrase "For equal absolute values, returns the smallest positive argument" in the manual is a bit ambiguous IMO, so I ended up checking what I6500 did). > Usual fixes/stable thing. > Signed-off-by: Miodrag Dinic <miodrag.di...@imgtec.com> > Signed-off-by: Goran Ferenc <goran.fer...@imgtec.com> > Signed-off-by: Aleksandar Markovic <aleksandar.marko...@imgtec.com> Reviewed-by: James Hogan <james.ho...@imgtec.com> Thanks James > --- > arch/mips/math-emu/dp_fmax.c | 8 ++++++-- > arch/mips/math-emu/dp_fmin.c | 6 +++++- > arch/mips/math-emu/sp_fmax.c | 8 ++++++-- > arch/mips/math-emu/sp_fmin.c | 6 +++++- > 4 files changed, 22 insertions(+), 6 deletions(-) > > diff --git a/arch/mips/math-emu/dp_fmax.c b/arch/mips/math-emu/dp_fmax.c > index a0175cc..860b43f9 100644 > --- a/arch/mips/math-emu/dp_fmax.c > +++ b/arch/mips/math-emu/dp_fmax.c > @@ -224,7 +224,11 @@ union ieee754dp ieee754dp_fmaxa(union ieee754dp x, union > ieee754dp y) > return y; > > /* Compare mantissa */ > - if (xm <= ym) > + if (xm < ym) > return y; > - return x; > + else if (xm > ym) > + return x; > + else if (xs == 0) > + return x; > + return y; > } > diff --git a/arch/mips/math-emu/dp_fmin.c b/arch/mips/math-emu/dp_fmin.c > index 074a858..73d85e4 100644 > --- a/arch/mips/math-emu/dp_fmin.c > +++ b/arch/mips/math-emu/dp_fmin.c > @@ -224,7 +224,11 @@ union ieee754dp ieee754dp_fmina(union ieee754dp x, union > ieee754dp y) > return x; > > /* Compare mantissa */ > - if (xm <= ym) > + if (xm < ym) > + return x; > + else if (xm > ym) > + return y; > + else if (xs == 1) > return x; > return y; > } > diff --git a/arch/mips/math-emu/sp_fmax.c b/arch/mips/math-emu/sp_fmax.c > index 15825db..fec7f64 100644 > --- a/arch/mips/math-emu/sp_fmax.c > +++ b/arch/mips/math-emu/sp_fmax.c > @@ -224,7 +224,11 @@ union ieee754sp ieee754sp_fmaxa(union ieee754sp x, union > ieee754sp y) > return y; > > /* Compare mantissa */ > - if (xm <= ym) > + if (xm < ym) > return y; > - return x; > + else if (xm > ym) > + return x; > + else if (xs == 0) > + return x; > + return y; > } > diff --git a/arch/mips/math-emu/sp_fmin.c b/arch/mips/math-emu/sp_fmin.c > index f1418f7..74780bc 100644 > --- a/arch/mips/math-emu/sp_fmin.c > +++ b/arch/mips/math-emu/sp_fmin.c > @@ -225,7 +225,11 @@ union ieee754sp ieee754sp_fmina(union ieee754sp x, union > ieee754sp y) > return x; > > /* Compare mantissa */ > - if (xm <= ym) > + if (xm < ym) > + return x; > + else if (xm > ym) > + return y; > + else if (xs == 1) > return x; > return y; > } > -- > 2.7.4 >
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