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Re: [PATCH, i386]: Switch x86 to TARGET_SUPPORTS_WIDE_INT

On Thu, Apr 30, 2015 at 12:01 PM, Uros Bizjak <> wrote:
> Hello!
> Attached patch switches x86 to TARGET_SUPPORTS_WIDE_INT.
> The patch builds on the fact that build requires
> HOST_BITS_PER_WIDE_INT = 64 capable host. Taking this in account,
> noticeable blocks of code can be removed, and all but one
> immed_double_const can be removed.
> The only wide-int mode that remains is TImode.
> 2015-04-30  Uros Bizjak  <>
>     * config/i386/i386.h (TARGET_SUPPORTS_WIDE_INT): New define.
>     * config/i386/i386.c (ix86_legitimate_constant_p): Handle TImode
>     (ix86_cannot_force_const_mem): Handle CONST_WIDE_INT.
>     (output_pic_addr_const): Do not handle VOIDmode CONST_DOUBLEs.
>     (ix86_find_base_term): Do not check for CONST_DOUBLE.
>     (ix86_print_operand): Do not handle non-FPmode CONST_DOUBLEs.
>     (ix86_build_signbit_mask): Rewrite using wide ints.
>     (ix86_split_to_parts) [HOST_BITS_PER_WIDE_INT < 64]: Remove.
>     (ix86_rtx_costs): Handle CONST_WIDE_INT.
>     (find_constant): Ditto.
>     * config/i386/ (bts, btr, btc peepholes): Rewrite
>     using gen_int_mode.
>     * config/i386/ (x86_64_immediate_operand)
>     <case CONST_INT>: Remove HOST_BITS_PER_WIDE_INT == 32 code.
>     (x86_64_zext_immediate_operand): Remove CONST_DOUBLE handling.
>     <case CONST_INT>: Remove HOST_BITS_PER_WIDE_INT == 32 code.
>     (const0_operand): Also match const_wide_int.
>     (constm1_operand): Ditto.
>     (const1_operand): Ditto.
> Patch was bootstrapped and regression tested on x86_64-linux-gnu
> {,-m32} and i686-linux-gnu.
> I won't be able to commit the patch until Monday. H.J., can you please
> test it on your SPEC testers, so there won't be any surprises w.r.t.
> performance issues.

Hi Igor,

Can your team run SPEC CPU on this patch?



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