This patch adds the basic support for -mcpu=future, which is a framework to add
support for possible future PowerPCs. This patch is only sets the future bit
in the ISA options.
Can I check this into GCC 15 when it opens up, and immediately back port it to
GCC 14 after GCC 14.0 is released?
2024-02-14 Michael Meissner <meiss...@linux.ibm.com>
gcc/
* config/rs6000/rs6000-cpus.def (ISA_FUTURE_MASKS_SERVER): New option
bits for -mcpu=future.
(POWERPC_MASKS): Add -mfuture mask.
(future cpu): Add -mcpu=future.
* config/rs6000/rs6000-opts.h (PROCESSOR_FUTURE): New processor type.
* config/rs6000/rs6000-tables.opt (rs6000_cpu_opt_value): Likewise.
* config/rs6000/rs6000.md (cpu attribute): Likewise.
* config/rs6000/rs6000.opt (-mfuture): New insert mask for -mcpu=future.
* doc/invoke.texi (PowerPC options): Add -mcpu=future.
---
gcc/config/rs6000/rs6000-cpus.def | 6 ++++++
gcc/config/rs6000/rs6000-opts.h | 1 +
gcc/config/rs6000/rs6000-tables.opt | 3 +++
gcc/config/rs6000/rs6000.md | 2 +-
gcc/config/rs6000/rs6000.opt | 4 ++++
gcc/doc/invoke.texi | 2 +-
6 files changed, 16 insertions(+), 2 deletions(-)
diff --git a/gcc/config/rs6000/rs6000-cpus.def
b/gcc/config/rs6000/rs6000-cpus.def
index d28cc87eb2a..a47075f8249 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -88,6 +88,10 @@
| OPTION_MASK_POWER10 \
| OTHER_POWER10_MASKS)
+/* Flags for a potential future processor that may or may not be delivered. */
+#define ISA_FUTURE_MASKS_SERVER (ISA_3_1_MASKS_SERVER
\
+ | OPTION_MASK_FUTURE)
+
/* Flags that need to be turned off if -mno-power9-vector. */
#define OTHER_P9_VECTOR_MASKS (OPTION_MASK_FLOAT128_HW \
| OPTION_MASK_P9_MINMAX)
@@ -135,6 +139,7 @@
| OPTION_MASK_LOAD_VECTOR_PAIR \
| OPTION_MASK_POWER10 \
| OPTION_MASK_P10_FUSION \
+ | OPTION_MASK_FUTURE \
| OPTION_MASK_HTM \
| OPTION_MASK_ISEL \
| OPTION_MASK_MFCRF \
@@ -267,3 +272,4 @@ RS6000_CPU ("powerpc64", PROCESSOR_POWERPC64,
OPTION_MASK_PPC_GFXOPT
RS6000_CPU ("powerpc64le", PROCESSOR_POWER8, MASK_POWERPC64
| ISA_2_7_MASKS_SERVER | OPTION_MASK_HTM)
RS6000_CPU ("rs64", PROCESSOR_RS64A, OPTION_MASK_PPC_GFXOPT | MASK_POWERPC64)
+RS6000_CPU ("future", PROCESSOR_FUTURE, MASK_POWERPC64 |
ISA_FUTURE_MASKS_SERVER)
diff --git a/gcc/config/rs6000/rs6000-opts.h b/gcc/config/rs6000/rs6000-opts.h
index 33fd0efc936..b2ae180c0f0 100644
--- a/gcc/config/rs6000/rs6000-opts.h
+++ b/gcc/config/rs6000/rs6000-opts.h
@@ -62,6 +62,7 @@ enum processor_type
PROCESSOR_POWER8,
PROCESSOR_POWER9,
PROCESSOR_POWER10,
+ PROCESSOR_FUTURE,
PROCESSOR_RS64A,
PROCESSOR_MPCCORE,
diff --git a/gcc/config/rs6000/rs6000-tables.opt
b/gcc/config/rs6000/rs6000-tables.opt
index 65f46709716..97fa98a2e65 100644
--- a/gcc/config/rs6000/rs6000-tables.opt
+++ b/gcc/config/rs6000/rs6000-tables.opt
@@ -197,3 +197,6 @@ Enum(rs6000_cpu_opt_value) String(powerpc64le) Value(55)
EnumValue
Enum(rs6000_cpu_opt_value) String(rs64) Value(56)
+EnumValue
+Enum(rs6000_cpu_opt_value) String(future) Value(57)
+
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index 4acb4031ae0..bd0ecdd9007 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -350,7 +350,7 @@ (define_attr "cpu"
ppc750,ppc7400,ppc7450,
ppc403,ppc405,ppc440,ppc476,
ppc8540,ppc8548,ppce300c2,ppce300c3,ppce500mc,ppce500mc64,ppce5500,ppce6500,
- power4,power5,power6,power7,power8,power9,power10,
+ power4,power5,power6,power7,power8,power9,power10,future,
rs64a,mpccore,cell,ppca2,titan"
(const (symbol_ref "(enum attr_cpu) rs6000_tune")))
diff --git a/gcc/config/rs6000/rs6000.opt b/gcc/config/rs6000/rs6000.opt
index 60b923f5e4b..4ad1d8e302c 100644
--- a/gcc/config/rs6000/rs6000.opt
+++ b/gcc/config/rs6000/rs6000.opt
@@ -612,6 +612,10 @@ mrop-protect
Target Var(rs6000_rop_protect) Init(0)
Enable instructions that guard against return-oriented programming attacks.
+mfuture
+Target Undocumented Mask(FUTURE) Var(rs6000_isa_flags) Warn(Do not use
%<-mfuture>)
+Generate (do not generate) store vector pair instructions.
+
mprivileged
Target Var(rs6000_privileged) Init(0)
Generate code that will run in privileged state.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 71339b8b30f..dcc9f82171c 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -31091,7 +31091,7 @@ Supported values for @var{cpu_type} are @samp{401},
@samp{403},
@samp{titan}, @samp{power3}, @samp{power4}, @samp{power5}, @samp{power5+},
@samp{power6}, @samp{power6x}, @samp{power7}, @samp{power8},
@samp{power9}, @samp{power10}, @samp{powerpc}, @samp{powerpc64},
-@samp{powerpc64le}, @samp{rs64}, and @samp{native}.
+@samp{powerpc64le}, @samp{rs64}, @samp{future}, and @samp{native}.
@option{-mcpu=powerpc}, @option{-mcpu=powerpc64}, and
@option{-mcpu=powerpc64le} specify pure 32-bit PowerPC (either
--
2.43.0
--
Michael Meissner, IBM
PO Box 98, Ayer, Massachusetts, USA, 01432
email: meiss...@linux.ibm.com
