Re: [Qemu-devel] [PATCH v3 4/4] target-tilegx: Integrate floating pointer implementation

[Richard Henderson <rth@twiddle.net>]

On 12/10/2015 06:16 AM, Chen Gang wrote:
> 
> It passes normal building, and gcc testsuite.
> 
> Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
> ---
>  target-tilegx/Makefile.objs |  3 +-
>  target-tilegx/cpu.h         |  2 ++
>  target-tilegx/helper.h      | 12 ++++++++
>  target-tilegx/translate.c   | 68 +++++++++++++++++++++++++++++++++++++++------
>  4 files changed, 75 insertions(+), 10 deletions(-)
> 
> diff --git a/target-tilegx/Makefile.objs b/target-tilegx/Makefile.objs
> index 0db778f..136ad60 100644
> --- a/target-tilegx/Makefile.objs
> +++ b/target-tilegx/Makefile.objs
> @@ -1 +1,2 @@
> -obj-y += cpu.o translate.o helper.o simd_helper.o
> +obj-y += cpu.o translate.o helper.o simd_helper.o \
> +		helper-fsingle.o helper-fdouble.o
> diff --git a/target-tilegx/cpu.h b/target-tilegx/cpu.h
> index 03df107..445a606 100644
> --- a/target-tilegx/cpu.h
> +++ b/target-tilegx/cpu.h
> @@ -88,6 +88,8 @@ typedef struct CPUTLGState {
>      uint64_t spregs[TILEGX_SPR_COUNT]; /* Special used registers by outside */
>      uint64_t pc;                       /* Current pc */
>  
> +    float_status fp_status;            /* floating point status */

As mentioned elsewhere, this is pointless.

> +    case OE_RR_X0(FSINGLE_PACK1):
> +    case OE_RR_Y0(FSINGLE_PACK1):
> +        mnemonic = "fsingle_pack1";
> +        goto done2;

This could use a comment that we're "copying" dest to dest.

> @@ -742,13 +745,21 @@ static TileExcp gen_rr_opcode(DisasContext *dc, unsigned opext,
>  static TileExcp gen_rrr_opcode(DisasContext *dc, unsigned opext,
>                                 unsigned dest, unsigned srca, unsigned srcb)
>  {
> -    TCGv tdest = dest_gr(dc, dest);
> -    TCGv tsrca = load_gr(dc, srca);
> -    TCGv tsrcb = load_gr(dc, srcb);
> +    TCGv tdest, tsrca, tsrcb;
>      TCGv t0;
>      const char *mnemonic;
>  
>      switch (opext) {
> +    case OE_RRR(FSINGLE_ADDSUB2, 0, X0):
> +        mnemonic = "fsingle_addsub2";
> +        goto done2;
> +    }

Likewise.


r~