[gcc(refs/vendors/ibm/heads/gcc-17-future)] Add miscellaneous -mcpu=future instructions

https://gcc.gnu.org/g:207cacd36362b25d08b7c18bcc0e7df15113ade2

commit 207cacd36362b25d08b7c18bcc0e7df15113ade2
Author: Michael Meissner <[email protected]>
Date:   Wed Jul 1 10:54:14 2026 -0400

    Add miscellaneous -mcpu=future instructions
    
    2026-07-01  Michael Meissner  <[email protected]>
    
    gcc/
    
            * config/rs6000/rs6000-cpus.def (FUTURE_MASKS_SERVER): Enable using load
            vector pair and store vector pair instructions for memory copy
            operations.
            (POWERPC_MASKS): Make the option for enabling using load vector pair and
            store vector pair operations set and reset when the PowerPC processor is
            changed.
            * config/rs6000/rs6000.cc (rs6000_machine_from_flags): Disable
            -mblock-ops-vector-pair from influencing .machine selection.
    
    gcc/testsuite/
    
            * gcc.target/powerpc/future-3.c: New test.
    
    2026-07-01   Michael Meissner  <[email protected]>
    
    gcc/
    
            * config/rs6000/rs6000.md (gtu_geu): New code iterator.
            (subfus<mode>3_<code>): New insns.
    
    gcc/testsuite/
    
            * gcc.target/powerpc/saturate-subtract-1.c: New test.
            * gcc.target/powerpc/saturate-subtract-2.c: Likewise.
            * lib/target-supports.exp (check_effective_target_powerpc_future_ok):
            New target test.
    
    2026-07-01  Michael Meissner  <[email protected]>
    
    gcc/
    
            * config/rs6000/altivec.md (xvrlw): New insn.
            * config/rs6000/rs6000.h (TARGET_XVRLW): New macro.
    
    gcc/testsuite/
    
            * gcc.target/powerpc/vector-rotate-left.c: New test.
    
    2026-07-01   Michael Meissner  <[email protected]>
    
    gcc/
    
            * config/rs6000/rs6000-string.cc (expand_block_move): Do not generate
            lxvl and stxvl on 32-bit.
            * config/rs6000/vsx.md (lxvl): If -mcpu=future, generate the lxvl with
            the shift count automaticaly used in the insn.
            (lxvrl): New insn for -mcpu=future.
            (lxvrll): Likewise.
            (stxvl): If -mcpu=future, generate the stxvl with the shift count
            automaticaly used in the insn.
            (stxvrl): New insn for -mcpu=future.
            (stxvrll): Likewise.
    
    gcc/testsuite/
    
            * gcc.target/powerpc/lxvrl.c: New test.
    
    2026-07-01  Michael Meissner  <[email protected]>
    
    gcc/
    
            * config/rs6000/constraints.md (eU): New constraint.
            (eV): Likewise.
            * config/rs6000/predicates.md (paddis_operand): New predicate.
            (paddis_paddi_operand): Likewise.
            (add_cint_operand): Add paddis support.
            (reg_or_add_cint_operand): Add support for adds that can be done with
            paddis and paddi/addi.
            (add_operand): Add support for adds that can be done with paddis, but
            not paddis + paddi/addi..
            * config/rs6000/rs6000.cc (num_insns_constant_gpr): Add support for adds
            that can be done with paddis and also paddis combined with paddi/addi.
            (print_operand): Add %B<n> for paddis support.
            * config/rs6000/rs6000.h (TARGET_PADDIS): New macro.
            (SIGNED_INTEGER_64BIT_P): Likewise.
            * config/rs6000/rs6000.md (add<mode>3 define_expand): Add paddis
            support.
            (*add<mode>3 define_insn): Likewise.
            (movdi_internal64): Likewise.
            (movdi splitter): New splitter for paddis + paddi/addi.
            * doc/md.texi (PowerPC constraints): Add eU and eV documentation.
    
    gcc/testsuite/
    
            * gcc.target/powerpc/prefixed-addis.c: New test.

Diff:
---
 gcc/config/rs6000/rs6000-cpus.def | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/rs6000-cpus.def b/gcc/config/rs6000/rs6000-cpus.def
index 482d39bc4d82..331501179099 100644
--- a/gcc/config/rs6000/rs6000-cpus.def
+++ b/gcc/config/rs6000/rs6000-cpus.def
@@ -101,7 +101,7 @@
    will be fixed in potential future machines.  */
 #define FUTURE_MASKS_SERVER    (POWER11_MASKS_SERVER			\
 				| OPTION_MASK_BLOCK_OPS_VECTOR_PAIR	\
-				| OPTION_MASK_DMF			\
+				| OPTION_MASK_DENSE_MATH		\
 				| OPTION_MASK_FUTURE)
 
 /* Flags that need to be turned off if -mno-vsx.  */