[PATCH-v2] sparc: Rename NGMP to GR740 and add configs for UT699, UT700, and GR712RC

[Sebastian Huber]

----- Jiri Gaisler <jiri at gaisler.se> schrieb:
> 
> 
> On 07/19/2017 04:04 PM, Sebastian Huber wrote:
> > Hello Jiri,
> >
> > I fixed a couple of tests. One remaining failure on the leon2 is mathf:
> >
> > *** BEGIN OF TEST MATHF ***
> > acosf          : 1.570796
> > acoshf         : -nan
> > asinf          : 1.570796
> > asinhf         : 0.881374
> > atanf          : 0.665774
> > atan2f         : 0.785398
> > atanhf         : inf
> > cbrtf          : 3.000000
> > ceilf          : 4.000000
> > copysignf      : -3.500000
> > cosf           : -0.000000
> > coshf          : 2.509179
> > erff           : 1.000000
> > erfcf          : 0.000000
> > expf           : 1.521962
> > exp2f          : 1.337928
> > expm1f         : 0.000420
> > fabsf          : 1.123000
> > fdimf          : 0.000000
> > floorf         : 0.000000
> > floorf         : -1.000000
> >
> > Breakpoint 1, 0x40004044 in fmaf (x=x at entry=2.0999999, y=2.20000005,
> > z=3.00999999) at
> > /home/EB/sebastian_h/archive/gcc-git/newlib/libm/common/sf_fma.c:25
> > 25        return (float) (((double) x * (double) y) + (double) z);
> > (gdb) disas 0x40004044
> > Dump of assembler code for function fmaf:
> >    0x40004024 <+0>:     add  %sp, -80, %sp
> >    0x40004028 <+4>:     st  %o1, [ %sp + 0x4c ]
> >    0x4000402c <+8>:     ld  [ %sp + 0x4c ], %f8
> >    0x40004030 <+12>:    st  %o0, [ %sp + 0x4c ]
> >    0x40004034 <+16>:    ld  [ %sp + 0x4c ], %f9
> >    0x40004038 <+20>:    st  %o2, [ %sp + 0x4c ]
> >    0x4000403c <+24>:    fsmuld  %f8, %f9, %f0
> >    0x40004040 <+28>:    ld  [ %sp + 0x4c ], %f8
> > => 0x40004044 <+32>:    fstod  %f8, %f8
> >    0x40004048 <+36>:    add  %sp, 0x50, %sp
> >    0x4000404c <+40>:    faddd  %f0, %f8, %f0
> >    0x40004050 <+44>:    retl
> >    0x40004054 <+48>:    fdtos  %f0, %f0
> > End of assembler dump.
> > (gdb) p/x $fsr
> > $1 = 0xe660
> >
> > Is fstod implemented on the SIS?
> fstod is implemented.
>  
> The instruction that takes the trap is at 0x40004040, which is ld  [ %sp
> + 0x4c ], %f8. Remember that SPARC has deferred FPU trap model so it is
> actually the previous FPU instruction FSMULD at 0x4000403c that
> generated the trap. This instruction is not implemented in sis, and I am
> not sure it is even implemented in some leon2/leon3 hardware. I will
> check and report back ...
> 
> Jiri.
> 

I use -mcpu=leon -mfix-at697f and according to the manual we have:

The AT697F floating-point unit is based on the MEIKO core and implements the SPARC floating-point instruction-set defined in the SPARC Architecture Manual version 8.

-- 
Sebastian Huber, embedded brains GmbH

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