https://gcc.gnu.org/g:48949eb4dc376e3aa7cf0091c8ae41857de6636d

commit 48949eb4dc376e3aa7cf0091c8ae41857de6636d
Author: Michael Meissner <meiss...@linux.ibm.com>
Date:   Sat Jul 20 01:05:21 2024 -0400

    Add -mcpu=power11 support.
    
    This patch adds the power11 option to the -mcpu= and -mtune= switches.
    
    This patch treats the power11 like a power10 in terms of costs and 
reassociation
    width.
    
    This patch issues a ".machine power11" to the assembly file if you use
    -mcpu=power11.
    
    This patch defines _ARCH_PWR11 if the user uses -mcpu=power11.
    
    This patch allows GCC to be configured with the --with-cpu=power11 and
    --with-tune=power11 options.
    
    This patch passes -mpwr11 to the assembler if the user uses -mcpu=power11.
    
    This patch adds support for using "power11" in the __builtin_cpu_is built-in
    function.
    
    2024-07-20  Michael Meissner  <meiss...@linux.ibm.com>
    
    gcc/
    
            * config.gcc (powerpc*-*-*): Add support for power11.
            * config/rs6000/aix71.h (ASM_CPU_SPEC): Add support for 
-mcpu=power11.
            * config/rs6000/aix72.h (ASM_CPU_SPEC): Likewise.
            * config/rs6000/aix73.h (ASM_CPU_SPEC): Likewise.
            * config/rs6000/driver-rs6000.cc (asm_names): Likewise.
            * config/rs6000/ppc-auxv.h (PPC_PLATFORM_POWER11): New define.
            * config/rs6000/rs6000-builtin.cc (cpu_is_info): Add power11.
            * config/rs6000/rs6000-c.cc (rs6000_target_modify_macros): Define
            _ARCH_PWR11 if -mcpu=power11.
            * config/rs6000/rs6000-cpus.def (POWER11_MASKS_SERVER): New define.
            (POWERPC_MASKS): Add power11.
            (power11 cpu): Add power11 definition.
            * config/rs6000/rs6000-opts.h (PROCESSOR_POWER11): Add power11 
processor.
            * config/rs6000/rs6000-string.cc (expand_compare_loop): Likewise.
            * config/rs6000/rs6000-tables.opt: Regenerate.
            * config/rs6000/rs6000.cc (rs6000_option_override_internal): Add 
power11
            support.
            (rs6000_machine_from_flags): Likewise.
            (rs6000_reassociation_width): Likewise.
            (rs6000_adjust_cost): Likewise.
            (rs6000_issue_rate): Likewise.
            (rs6000_sched_reorder): Likewise.
            (rs6000_sched_reorder2): Likewise.
            (rs6000_register_move_cost): Likewise.
            (rs6000_opt_masks): Likewise.
            * config/rs6000/rs6000.h (ASM_CPU_SPEC): Likewise.
            * config/rs6000/rs6000.md (cpu attribute): Add power11.
            * config/rs6000/rs6000.opt (-mpower11): Add internal power11 flag.
            * doc/invoke.texi (RS/6000 and PowerPC Options): Document 
-mcpu=power11.

Diff:
---
 gcc/config.gcc                      |  4 ++--
 gcc/config/rs6000/aix71.h           |  1 +
 gcc/config/rs6000/aix72.h           |  1 +
 gcc/config/rs6000/aix73.h           |  1 +
 gcc/config/rs6000/driver-rs6000.cc  |  2 ++
 gcc/config/rs6000/ppc-auxv.h        |  3 +--
 gcc/config/rs6000/rs6000-builtin.cc |  1 +
 gcc/config/rs6000/rs6000-c.cc       |  2 ++
 gcc/config/rs6000/rs6000-cpus.def   |  5 +++++
 gcc/config/rs6000/rs6000-opts.h     |  1 +
 gcc/config/rs6000/rs6000-string.cc  |  1 +
 gcc/config/rs6000/rs6000-tables.opt | 11 +++++++----
 gcc/config/rs6000/rs6000.cc         | 32 ++++++++++++++++++++++++--------
 gcc/config/rs6000/rs6000.h          |  1 +
 gcc/config/rs6000/rs6000.md         |  2 +-
 gcc/config/rs6000/rs6000.opt        |  6 ++++++
 gcc/doc/invoke.texi                 |  2 +-
 17 files changed, 58 insertions(+), 18 deletions(-)

diff --git a/gcc/config.gcc b/gcc/config.gcc
index bc45615741b1..7453ade07826 100644
--- a/gcc/config.gcc
+++ b/gcc/config.gcc
@@ -533,7 +533,7 @@ powerpc*-*-*)
        extra_headers="${extra_headers} ppu_intrinsics.h spu2vmx.h vec_types.h 
si2vmx.h"
        extra_headers="${extra_headers} amo.h"
        case x$with_cpu in
-           
xpowerpc64|xdefault64|x6[23]0|x970|xG5|xpower[3456789]|xpower10|xpower6x|xrs64a|xcell|xa2|xe500mc64|xe5500|xe6500)
+           
xpowerpc64|xdefault64|x6[23]0|x970|xG5|xpower[3456789]|xpower1[01]|xpower6x|xrs64a|xcell|xa2|xe500mc64|xe5500|xe6500)
                cpu_is_64bit=yes
                ;;
        esac
@@ -5641,7 +5641,7 @@ case "${target}" in
                                eval "with_$which=405"
                                ;;
                        "" | common | native \
-                       | power[3456789] | power10 | power5+ | power6x \
+                       | power[3456789] | power1[01] | power5+ | power6x \
                        | powerpc | powerpc64 | powerpc64le \
                        | rs64 \
                        | 401 | 403 | 405 | 405fp | 440 | 440fp | 464 | 464fp \
diff --git a/gcc/config/rs6000/aix71.h b/gcc/config/rs6000/aix71.h
index 24bc301e37d6..41037b3852d7 100644
--- a/gcc/config/rs6000/aix71.h
+++ b/gcc/config/rs6000/aix71.h
@@ -79,6 +79,7 @@ do {                                                          
        \
 #undef ASM_CPU_SPEC
 #define ASM_CPU_SPEC \
 "%{mcpu=native: %(asm_cpu_native); \
+  mcpu=power11: -mpwr11; \
   mcpu=power10: -mpwr10; \
   mcpu=power9: -mpwr9; \
   mcpu=power8: -mpwr8; \
diff --git a/gcc/config/rs6000/aix72.h b/gcc/config/rs6000/aix72.h
index c43974f577af..fe59f8319b48 100644
--- a/gcc/config/rs6000/aix72.h
+++ b/gcc/config/rs6000/aix72.h
@@ -79,6 +79,7 @@ do {                                                          
        \
 #undef ASM_CPU_SPEC
 #define ASM_CPU_SPEC \
 "%{mcpu=native: %(asm_cpu_native); \
+  mcpu=power11: -mpwr11; \
   mcpu=power10: -mpwr10; \
   mcpu=power9: -mpwr9; \
   mcpu=power8: -mpwr8; \
diff --git a/gcc/config/rs6000/aix73.h b/gcc/config/rs6000/aix73.h
index b1572bde81f9..1318b0b3662d 100644
--- a/gcc/config/rs6000/aix73.h
+++ b/gcc/config/rs6000/aix73.h
@@ -79,6 +79,7 @@ do {                                                          
        \
 #undef ASM_CPU_SPEC
 #define ASM_CPU_SPEC \
 "%{mcpu=native: %(asm_cpu_native); \
+  mcpu=power11: -mpwr11; \
   mcpu=power10: -mpwr10; \
   mcpu=power9: -mpwr9; \
   mcpu=power8: -mpwr8; \
diff --git a/gcc/config/rs6000/driver-rs6000.cc 
b/gcc/config/rs6000/driver-rs6000.cc
index 3ebbaa42622a..f4900724b98a 100644
--- a/gcc/config/rs6000/driver-rs6000.cc
+++ b/gcc/config/rs6000/driver-rs6000.cc
@@ -451,6 +451,7 @@ static const struct asm_name asm_names[] = {
   { "power8",  "-mpwr8" },
   { "power9",  "-mpwr9" },
   { "power10", "-mpwr10" },
+  { "power11", "-mpwr11" },
   { "powerpc", "-mppc" },
   { "rs64",    "-mppc" },
   { "603",     "-m603" },
@@ -479,6 +480,7 @@ static const struct asm_name asm_names[] = {
   { "power8",  "-mpower8" },
   { "power9",  "-mpower9" },
   { "power10", "-mpower10" },
+  { "power11", "-mpower11" },
   { "a2",      "-ma2" },
   { "powerpc", "-mppc" },
   { "powerpc64", "-mppc64" },
diff --git a/gcc/config/rs6000/ppc-auxv.h b/gcc/config/rs6000/ppc-auxv.h
index 364bba427d14..ed269e3b72b3 100644
--- a/gcc/config/rs6000/ppc-auxv.h
+++ b/gcc/config/rs6000/ppc-auxv.h
@@ -47,9 +47,8 @@
 #define PPC_PLATFORM_PPC476            12
 #define PPC_PLATFORM_POWER8            13
 #define PPC_PLATFORM_POWER9            14
-
-/* This is not yet official.  */
 #define PPC_PLATFORM_POWER10           15
+#define PPC_PLATFORM_POWER11           16
 
 /* AT_HWCAP bits.  These must match the values defined in the Linux kernel.  */
 #define PPC_FEATURE_32              0x80000000
diff --git a/gcc/config/rs6000/rs6000-builtin.cc 
b/gcc/config/rs6000/rs6000-builtin.cc
index 0a24d20a58c4..117cf0125f86 100644
--- a/gcc/config/rs6000/rs6000-builtin.cc
+++ b/gcc/config/rs6000/rs6000-builtin.cc
@@ -2442,6 +2442,7 @@ static const struct
   const char *cpu;
   unsigned int cpuid;
 } cpu_is_info[] = {
+  { "power11",    PPC_PLATFORM_POWER11 },
   { "power10",    PPC_PLATFORM_POWER10 },
   { "power9",     PPC_PLATFORM_POWER9 },
   { "power8",     PPC_PLATFORM_POWER8 },
diff --git a/gcc/config/rs6000/rs6000-c.cc b/gcc/config/rs6000/rs6000-c.cc
index 6229c503bd0f..68519e1397f1 100644
--- a/gcc/config/rs6000/rs6000-c.cc
+++ b/gcc/config/rs6000/rs6000-c.cc
@@ -435,6 +435,8 @@ rs6000_target_modify_macros (bool define_p, HOST_WIDE_INT 
flags)
     rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR9");
   if ((flags & OPTION_MASK_POWER10) != 0)
     rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR10");
+  if ((flags & OPTION_MASK_POWER11) != 0)
+    rs6000_define_or_undefine_macro (define_p, "_ARCH_PWR11");
   if ((flags & OPTION_MASK_SOFT_FLOAT) != 0)
     rs6000_define_or_undefine_macro (define_p, "_SOFT_FLOAT");
   if ((flags & OPTION_MASK_RECIP_PRECISION) != 0)
diff --git a/gcc/config/rs6000/rs6000-cpus.def 
b/gcc/config/rs6000/rs6000-cpus.def
index 6ee678e69c32..84fac8bdac1d 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -86,6 +86,9 @@
                                 | OPTION_MASK_POWER10                  \
                                 | OTHER_POWER10_MASKS)
 
+#define POWER11_MASKS_SERVER (ISA_3_1_MASKS_SERVER                     \
+                             | OPTION_MASK_POWER11)
+
 /* Flags that need to be turned off if -mno-vsx.  */
 #define OTHER_VSX_VECTOR_MASKS (OPTION_MASK_EFFICIENT_UNALIGNED_VSX    \
                                 | OPTION_MASK_FLOAT128_KEYWORD         \
@@ -123,6 +126,7 @@
                                 | OPTION_MASK_FLOAT128_KEYWORD         \
                                 | OPTION_MASK_FPRND                    \
                                 | OPTION_MASK_POWER10                  \
+                                | OPTION_MASK_POWER11                  \
                                 | OPTION_MASK_P10_FUSION               \
                                 | OPTION_MASK_HTM                      \
                                 | OPTION_MASK_ISEL                     \
@@ -250,6 +254,7 @@ RS6000_CPU ("power8", PROCESSOR_POWER8, MASK_POWERPC64 | 
ISA_2_7_MASKS_SERVER
 RS6000_CPU ("power9", PROCESSOR_POWER9, MASK_POWERPC64 | ISA_3_0_MASKS_SERVER
            | OPTION_MASK_HTM)
 RS6000_CPU ("power10", PROCESSOR_POWER10, MASK_POWERPC64 | 
ISA_3_1_MASKS_SERVER)
+RS6000_CPU ("power11", PROCESSOR_POWER11, MASK_POWERPC64 | 
POWER11_MASKS_SERVER)
 RS6000_CPU ("powerpc", PROCESSOR_POWERPC, 0)
 RS6000_CPU ("powerpc64", PROCESSOR_POWERPC64, OPTION_MASK_PPC_GFXOPT
            | MASK_POWERPC64)
diff --git a/gcc/config/rs6000/rs6000-opts.h b/gcc/config/rs6000/rs6000-opts.h
index 33fd0efc936f..88e357835a5c 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_POWER11,
 
    PROCESSOR_RS64A,
    PROCESSOR_MPCCORE,
diff --git a/gcc/config/rs6000/rs6000-string.cc 
b/gcc/config/rs6000/rs6000-string.cc
index c4c62e8e2f94..0f992902f38c 100644
--- a/gcc/config/rs6000/rs6000-string.cc
+++ b/gcc/config/rs6000/rs6000-string.cc
@@ -964,6 +964,7 @@ expand_compare_loop (rtx operands[])
       break;
     case PROCESSOR_POWER9:
     case PROCESSOR_POWER10:
+    case PROCESSOR_POWER11:
       if (bytes_is_const)
        max_bytes = 191;
       else
diff --git a/gcc/config/rs6000/rs6000-tables.opt 
b/gcc/config/rs6000/rs6000-tables.opt
index 65f46709716f..a5649fef1ece 100644
--- a/gcc/config/rs6000/rs6000-tables.opt
+++ b/gcc/config/rs6000/rs6000-tables.opt
@@ -186,14 +186,17 @@ EnumValue
 Enum(rs6000_cpu_opt_value) String(power10) Value(52)
 
 EnumValue
-Enum(rs6000_cpu_opt_value) String(powerpc) Value(53)
+Enum(rs6000_cpu_opt_value) String(power11) Value(53)
 
 EnumValue
-Enum(rs6000_cpu_opt_value) String(powerpc64) Value(54)
+Enum(rs6000_cpu_opt_value) String(powerpc) Value(54)
 
 EnumValue
-Enum(rs6000_cpu_opt_value) String(powerpc64le) Value(55)
+Enum(rs6000_cpu_opt_value) String(powerpc64) Value(55)
 
 EnumValue
-Enum(rs6000_cpu_opt_value) String(rs64) Value(56)
+Enum(rs6000_cpu_opt_value) String(powerpc64le) Value(56)
+
+EnumValue
+Enum(rs6000_cpu_opt_value) String(rs64) Value(57)
 
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 5ed64b1e6866..eddd2adbab59 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -1067,7 +1067,7 @@ struct processor_costs power9_cost = {
   COSTS_N_INSNS (3),   /* SF->DF convert */
 };
 
-/* Instruction costs on POWER10 processors.  */
+/* Instruction costs on Power10/Power11 processors.  */
 static const
 struct processor_costs power10_cost = {
   COSTS_N_INSNS (2),   /* mulsi */
@@ -4385,7 +4385,8 @@ rs6000_option_override_internal (bool global_init_p)
      generating power10 instructions.  */
   if (!(rs6000_isa_flags_explicit & OPTION_MASK_P10_FUSION))
     {
-      if (rs6000_tune == PROCESSOR_POWER10)
+      if (rs6000_tune == PROCESSOR_POWER10
+         || rs6000_tune == PROCESSOR_POWER11)
        rs6000_isa_flags |= OPTION_MASK_P10_FUSION;
       else
        rs6000_isa_flags &= ~OPTION_MASK_P10_FUSION;
@@ -4414,6 +4415,7 @@ rs6000_option_override_internal (bool global_init_p)
                        && rs6000_tune != PROCESSOR_POWER8
                        && rs6000_tune != PROCESSOR_POWER9
                        && rs6000_tune != PROCESSOR_POWER10
+                       && rs6000_tune != PROCESSOR_POWER11
                        && rs6000_tune != PROCESSOR_PPCA2
                        && rs6000_tune != PROCESSOR_CELL
                        && rs6000_tune != PROCESSOR_PPC476);
@@ -4428,6 +4430,7 @@ rs6000_option_override_internal (bool global_init_p)
                                 || rs6000_tune == PROCESSOR_POWER8
                                 || rs6000_tune == PROCESSOR_POWER9
                                 || rs6000_tune == PROCESSOR_POWER10
+                                || rs6000_tune == PROCESSOR_POWER11
                                 || rs6000_tune == PROCESSOR_PPCE500MC
                                 || rs6000_tune == PROCESSOR_PPCE500MC64
                                 || rs6000_tune == PROCESSOR_PPCE5500
@@ -4727,6 +4730,7 @@ rs6000_option_override_internal (bool global_init_p)
        break;
 
       case PROCESSOR_POWER10:
+      case PROCESSOR_POWER11:
        rs6000_cost = &power10_cost;
        break;
 
@@ -5899,6 +5903,8 @@ rs6000_machine_from_flags (void)
   flags &= ~(OPTION_MASK_PPC_GFXOPT | OPTION_MASK_PPC_GPOPT | OPTION_MASK_ISEL
             | OPTION_MASK_ALTIVEC);
 
+  if ((flags & (POWER11_MASKS_SERVER & ~ISA_3_1_MASKS_SERVER)) != 0)
+    return "power11";
   if ((flags & (ISA_3_1_MASKS_SERVER & ~ISA_3_0_MASKS_SERVER)) != 0)
     return "power10";
   if ((flags & (ISA_3_0_MASKS_SERVER & ~ISA_2_7_MASKS_SERVER)) != 0)
@@ -10147,6 +10153,7 @@ rs6000_reassociation_width (unsigned int opc 
ATTRIBUTE_UNUSED,
     case PROCESSOR_POWER8:
     case PROCESSOR_POWER9:
     case PROCESSOR_POWER10:
+    case PROCESSOR_POWER11:
       if (DECIMAL_FLOAT_MODE_P (mode))
        return 1;
       if (VECTOR_MODE_P (mode))
@@ -18228,7 +18235,8 @@ rs6000_adjust_cost (rtx_insn *insn, int dep_type, 
rtx_insn *dep_insn, int cost,
 
        /* Separate a load from a narrower, dependent store.  */
        if ((rs6000_sched_groups || rs6000_tune == PROCESSOR_POWER9
-            || rs6000_tune == PROCESSOR_POWER10)
+            || rs6000_tune == PROCESSOR_POWER10
+            || rs6000_tune == PROCESSOR_POWER11)
            && GET_CODE (PATTERN (insn)) == SET
            && GET_CODE (PATTERN (dep_insn)) == SET
            && MEM_P (XEXP (PATTERN (insn), 1))
@@ -18267,6 +18275,7 @@ rs6000_adjust_cost (rtx_insn *insn, int dep_type, 
rtx_insn *dep_insn, int cost,
                 || rs6000_tune == PROCESSOR_POWER8
                 || rs6000_tune == PROCESSOR_POWER9
                 || rs6000_tune == PROCESSOR_POWER10
+                || rs6000_tune == PROCESSOR_POWER11
                  || rs6000_tune == PROCESSOR_CELL)
                 && recog_memoized (dep_insn)
                 && (INSN_CODE (dep_insn) >= 0))
@@ -18841,6 +18850,7 @@ rs6000_issue_rate (void)
   case PROCESSOR_POWER9:
     return 6;
   case PROCESSOR_POWER10:
+  case PROCESSOR_POWER11:
     return 8;
   default:
     return 1;
@@ -19556,8 +19566,10 @@ rs6000_sched_reorder (FILE *dump ATTRIBUTE_UNUSED, int 
sched_verbose,
   if (rs6000_tune == PROCESSOR_POWER6)
     load_store_pendulum = 0;
 
-  /* Do Power10 dependent reordering.  */
-  if (rs6000_tune == PROCESSOR_POWER10 && last_scheduled_insn)
+  /* Do Power10/Power11 dependent reordering.  */
+  if (last_scheduled_insn
+      && (rs6000_tune == PROCESSOR_POWER10
+         || rs6000_tune == PROCESSOR_POWER11))
     power10_sched_reorder (ready, n_ready - 1);
 
   return rs6000_issue_rate ();
@@ -19581,8 +19593,10 @@ rs6000_sched_reorder2 (FILE *dump, int sched_verbose, 
rtx_insn **ready,
       && recog_memoized (last_scheduled_insn) >= 0)
     return power9_sched_reorder2 (ready, *pn_ready - 1);
 
-  /* Do Power10 dependent reordering.  */
-  if (rs6000_tune == PROCESSOR_POWER10 && last_scheduled_insn)
+  /* Do Power10/Power11 dependent reordering.  */
+  if (last_scheduled_insn
+      && (rs6000_tune == PROCESSOR_POWER10
+         || rs6000_tune == PROCESSOR_POWER11))
     return power10_sched_reorder (ready, *pn_ready - 1);
 
   return cached_can_issue_more;
@@ -22799,7 +22813,8 @@ rs6000_register_move_cost (machine_mode mode,
                 allocation a move within the same class might turn
                 out to be a nop.  */
              if (rs6000_tune == PROCESSOR_POWER9
-                 || rs6000_tune == PROCESSOR_POWER10)
+                 || rs6000_tune == PROCESSOR_POWER10
+                 || rs6000_tune == PROCESSOR_POWER11)
                ret = 3 * hard_regno_nregs (FIRST_GPR_REGNO, mode);
              else
                ret = 4 * hard_regno_nregs (FIRST_GPR_REGNO, mode);
@@ -24470,6 +24485,7 @@ static struct rs6000_opt_mask const rs6000_opt_masks[] =
   { "float128-hardware",       OPTION_MASK_FLOAT128_HW,        false, true  },
   { "fprnd",                   OPTION_MASK_FPRND,              false, true  },
   { "power10",                 OPTION_MASK_POWER10,            false, true  },
+  { "power11",                 OPTION_MASK_POWER11,            false, false },
   { "hard-dfp",                        OPTION_MASK_DFP,                false, 
true  },
   { "htm",                     OPTION_MASK_HTM,                false, true  },
   { "isel",                    OPTION_MASK_ISEL,               false, true  },
diff --git a/gcc/config/rs6000/rs6000.h b/gcc/config/rs6000/rs6000.h
index 8ea9ac1707ea..703be908d944 100644
--- a/gcc/config/rs6000/rs6000.h
+++ b/gcc/config/rs6000/rs6000.h
@@ -101,6 +101,7 @@
    you make changes here, make them also there.  */
 #define ASM_CPU_SPEC \
 "%{mcpu=native: %(asm_cpu_native); \
+  mcpu=power11: -mpower11; \
   mcpu=power10: -mpower10; \
   mcpu=power9: -mpower9; \
   mcpu=power8|mcpu=powerpc64le: -mpower8; \
diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md
index f59be5365708..637a8591e775 100644
--- a/gcc/config/rs6000/rs6000.md
+++ b/gcc/config/rs6000/rs6000.md
@@ -350,7 +350,7 @@
    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,power11,
    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 e8ca70340df3..94323bd1db26 100644
--- a/gcc/config/rs6000/rs6000.opt
+++ b/gcc/config/rs6000/rs6000.opt
@@ -585,6 +585,12 @@ Target Undocumented Var(rs6000_speculate_indirect_jumps) 
Init(1) Save
 mpower10
 Target Undocumented Mask(POWER10) Var(rs6000_isa_flags) WarnRemoved
 
+;; Users should not use -mpower11, but we need to use a bit to identify when
+;; the user changes the default cpu via  #pragma GCC target("cpu=power11")
+;; and then resets it later.
+mpower11
+Target Undocumented Mask(POWER11) Var(rs6000_isa_flags) WarnRemoved
+
 mprefixed
 Target Mask(PREFIXED) Var(rs6000_isa_flags)
 Generate (do not generate) prefixed memory instructions.
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index f052128e2a5d..c19ca6de5d3a 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -31558,7 +31558,7 @@ Supported values for @var{cpu_type} are @samp{401}, 
@samp{403},
 @samp{e6500}, @samp{ec603e}, @samp{G3}, @samp{G4}, @samp{G5},
 @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{power9}, @samp{power10}, @samp{power11}, @samp{powerpc}, 
@samp{powerpc64},
 @samp{powerpc64le}, @samp{rs64}, and @samp{native}.
 
 @option{-mcpu=powerpc}, @option{-mcpu=powerpc64}, and

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