On Thu, 2021-07-29 at 08:30 -0500, Bill Schmidt wrote:
> 2021-06-07 Bill Schmidt <wschm...@linux.ibm.com>
>
> gcc/
> * config/rs6000/rs6000-builtin-new.def: Add always, power5, and
> power6 stanzas.
> ---
> gcc/config/rs6000/rs6000-builtin-new.def | 72 ++++++++++++++++++++++++
> 1 file changed, 72 insertions(+)
>
> diff --git a/gcc/config/rs6000/rs6000-builtin-new.def
> b/gcc/config/rs6000/rs6000-builtin-new.def
> index 974cdc8c37c..ca694be1ac3 100644
> --- a/gcc/config/rs6000/rs6000-builtin-new.def
> +++ b/gcc/config/rs6000/rs6000-builtin-new.def
> @@ -184,6 +184,78 @@
>
>
>
> +; Builtins that have been around since time immemorial or are just
> +; considered available everywhere.
> +[always]
> + void __builtin_cpu_init ();
> + CPU_INIT nothing {cpu}
> +
> + bool __builtin_cpu_is (string);
> + CPU_IS nothing {cpu}
> +
> + bool __builtin_cpu_supports (string);
> + CPU_SUPPORTS nothing {cpu}
> +
> + unsigned long long __builtin_ppc_get_timebase ();
> + GET_TB rs6000_get_timebase {}
> +
> + double __builtin_mffs ();
> + MFFS rs6000_mffs {}
> +
> +; This will break for long double == _Float128. libgcc history.
Add a few more words to provide bigger hints for future archeological
digs? (This is perhaps an obvious issue, but I'd need to do some
spelunking)
I see similar comments below, maybe just a wordier comment for the
first occurance. Unsure...
> + const long double __builtin_pack_longdouble (double, double);
> + PACK_TF packtf {}
> +
> + unsigned long __builtin_ppc_mftb ();
> + MFTB rs6000_mftb_di {32bit}
> +
> + void __builtin_mtfsb0 (const int<5>);
> + MTFSB0 rs6000_mtfsb0 {}
> +
> + void __builtin_mtfsb1 (const int<5>);
> + MTFSB1 rs6000_mtfsb1 {}
> +
> + void __builtin_mtfsf (const int<8>, double);
> + MTFSF rs6000_mtfsf {}
> +
> + const __ibm128 __builtin_pack_ibm128 (double, double);
> + PACK_IF packif {}
> +
> + void __builtin_set_fpscr_rn (const int[0,3]);
> + SET_FPSCR_RN rs6000_set_fpscr_rn {}
> +
> + const double __builtin_unpack_ibm128 (__ibm128, const int<1>);
> + UNPACK_IF unpackif {}
> +
> +; This will break for long double == _Float128. libgcc history.
> + const double __builtin_unpack_longdouble (long double, const int<1>);
> + UNPACK_TF unpacktf {}
> +
> +
> +; Builtins that have been around just about forever, but not quite.
> +[power5]
> + fpmath double __builtin_recipdiv (double, double);
> + RECIP recipdf3 {}
> +
> + fpmath float __builtin_recipdivf (float, float);
> + RECIPF recipsf3 {}
> +
> + fpmath double __builtin_rsqrt (double);
> + RSQRT rsqrtdf2 {}
> +
> + fpmath float __builtin_rsqrtf (float);
> + RSQRTF rsqrtsf2 {}
> +
> +
> +; Power6 builtins.
I see in subsequent patches you also call out the ISA version in the
comment. so perhaps
; Power6 builtins (ISA 2.05).
Similar comment for Power5 reference
above.
> +[power6]
> + const signed long __builtin_p6_cmpb (signed long, signed long);
> + CMPB cmpbdi3 {}
> +
> + const signed int __builtin_p6_cmpb_32 (signed int, signed int);
> + CMPB_32 cmpbsi3 {}
> +
> +
ok.
> ; AltiVec builtins.
> [altivec]
> const vsc __builtin_altivec_abs_v16qi (vsc);
