This is a preparatory patch for the bulk of the SVE2.2/SME2.2 support
series, putting into place some machinery used by the later patches.  This
includes TARGET_* constants that are set based on ISA flags,
__ARM_FEATURE_* macros, and new match_test definitions that are used to
enable/disable individual instruction patterns/alternatives.

On the testsuite side of things, this patch adds some rudimentary tests
that check that __ARM_FEATURE_* macros are correctly defined for various
combinations of target flags, as well as two new effective-target checks
in lib/target-supports.exp, one for each of SVE2.2-capable HW and
toolchain.

gcc/ChangeLog:

        * config/aarch64/aarch64-c.cc (aarch64_update_cpp_builtins):
        Emit definitions for __ARM_FEATURE_{SVE,SME}2p2.
        * config/aarch64/aarch64.h (TARGET_SVE2p2): New macro.
        (TARGET_SME2p2): Likewise.
        * config/aarch64/aarch64.md (arches): Add sve2p2_or_sme2p2 enum
        constant.
        (arch): Add test for sve2p2_or_sme2p2.
        * doc/invoke.texi: Document sve2p2 and sme2p2 extensions.

gcc/testsuite/ChangeLog:

        * gcc.target/aarch64/pragma_cpp_predefs_3.c: Add SVE2p2 tests.
        * gcc.target/aarch64/pragma_cpp_predefs_4.c: Add SME2p2 test.
        * lib/target-supports.exp
        (check_effective_target_aarch64_sve2p2_hw): New target check.
        (check_effective_target_aarch64_sve2p2_ok): New target check.
        (exts_sve2): Add sme2p2.
---
 gcc/config/aarch64/aarch64-c.cc               |   2 +
 gcc/config/aarch64/aarch64.h                  |   6 ++
 gcc/config/aarch64/aarch64.md                 |   7 +-
 gcc/doc/invoke.texi                           |   5 +
 .../gcc.target/aarch64/pragma_cpp_predefs_3.c | 100 ++++++++++++++++++
 .../gcc.target/aarch64/pragma_cpp_predefs_4.c |  14 +++
 gcc/testsuite/lib/target-supports.exp         |  29 ++++-
 7 files changed, 160 insertions(+), 3 deletions(-)

diff --git a/gcc/config/aarch64/aarch64-c.cc b/gcc/config/aarch64/aarch64-c.cc
index 212f288e3c2..430eb25459a 100644
--- a/gcc/config/aarch64/aarch64-c.cc
+++ b/gcc/config/aarch64/aarch64-c.cc
@@ -230,6 +230,7 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
   aarch64_def_or_undef (TARGET_SVE2_SHA3, "__ARM_FEATURE_SVE2_SHA3", pfile);
   aarch64_def_or_undef (TARGET_SVE2_SM4, "__ARM_FEATURE_SVE2_SM4", pfile);
   aarch64_def_or_undef (TARGET_SVE2p1, "__ARM_FEATURE_SVE2p1", pfile);
+  aarch64_def_or_undef (TARGET_SVE2p2, "__ARM_FEATURE_SVE2p2", pfile);
 
   aarch64_def_or_undef (TARGET_LSE, "__ARM_FEATURE_ATOMICS", pfile);
   aarch64_def_or_undef (TARGET_AES, "__ARM_FEATURE_AES", pfile);
@@ -310,6 +311,7 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
                        pfile);
   aarch64_def_or_undef (AARCH64_HAVE_ISA (SME2p1),
                        "__ARM_FEATURE_SME2p1", pfile);
+  aarch64_def_or_undef (TARGET_SME2p2, "__ARM_FEATURE_SME2p2", pfile);
   aarch64_def_or_undef (TARGET_FAMINMAX, "__ARM_FEATURE_FAMINMAX", pfile);
   aarch64_def_or_undef (TARGET_PCDPHINT, "__ARM_FEATURE_PCDPHINT", pfile);
   aarch64_def_or_undef (AARCH64_HAVE_ISA (SME_TMOP),
diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h
index cfebc3fc572..821dfb25d66 100644
--- a/gcc/config/aarch64/aarch64.h
+++ b/gcc/config/aarch64/aarch64.h
@@ -327,6 +327,9 @@ constexpr auto AARCH64_FL_DEFAULT_ISA_MODE ATTRIBUTE_UNUSED
 /* SVE2p1 instructions, enabled through +sve2p1.  */
 #define TARGET_SVE2p1 AARCH64_HAVE_ISA (SVE2p1)
 
+/* SVE2p2 instructions, enabled through +sve2p2.  */
+#define TARGET_SVE2p2 AARCH64_HAVE_ISA (SVE2p2)
+
 /* SME instructions, enabled through +sme.  Note that this does not
    imply anything about the state of PSTATE.SM; instructions that require
    SME and streaming mode should use TARGET_STREAMING instead.  */
@@ -357,6 +360,9 @@ constexpr auto AARCH64_FL_DEFAULT_ISA_MODE ATTRIBUTE_UNUSED
 /* SME2 instructions, enabled through +sme2.  */
 #define TARGET_SME2 AARCH64_HAVE_ISA (SME2)
 
+/* SME2p2 instructions, enabled through +sme2p2.  */
+#define TARGET_SME2p2 AARCH64_HAVE_ISA (SME2p2)
+
 /* Same with streaming mode enabled.  */
 #define TARGET_STREAMING_SME2 (TARGET_STREAMING && TARGET_SME2)
 
diff --git a/gcc/config/aarch64/aarch64.md b/gcc/config/aarch64/aarch64.md
index 70a64a6c0ed..cfceef91fbb 100644
--- a/gcc/config/aarch64/aarch64.md
+++ b/gcc/config/aarch64/aarch64.md
@@ -502,7 +502,7 @@
 ;; Q registers and is equivalent to "simd".
 
 (define_enum "arches" [any rcpc8_4 fp fp_q base_simd nobase_simd
-                      simd nosimd sve fp16 sme cssc])
+                      simd nosimd sve fp16 sme cssc sve2p2_or_sme2p2])
 
 (define_enum_attr "arch" "arches" (const_string "any"))
 
@@ -581,7 +581,10 @@
             (match_test "TARGET_SVE"))
 
        (and (eq_attr "arch" "sme")
-            (match_test "TARGET_SME"))))
+            (match_test "TARGET_SME"))
+
+       (and (eq_attr "arch" "sve2p2_or_sme2p2")
+            (match_test "TARGET_SVE2p2_OR_SME2p2"))))
     (const_string "yes")
     (const_string "no")))
 
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index 1dfa708df7b..46fb8ba7a20 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -23534,6 +23534,8 @@ Enable SVE2 aes instructions.  This also enables SVE2 
instructions.
 Enable SVE2 sha3 instructions.  This also enables SVE2 instructions.
 @item sve2p1
 Enable SVE2.1 instructions.  This also enables SVE2 instructions.
+@item sve2p2
+Enable SVE2.2 instructions.  This also enables SVE2 and SVE2.1 instructions.
 @item tme
 Enable the Transactional Memory Extension.
 @item i8mm
@@ -23600,6 +23602,9 @@ instructions.
 @item sme2p1
 Enable the Scalable Matrix Extension version 2.1.  This also enables SME2
 instructions.
+@item sme2p2
+Enable the Scalable Matrix Extension version 2.2.  This also enables SME2
+and SME2.1 instructions.
 @item fcma
 Enable the complex number SIMD extensions.
 @item jscvt
diff --git a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c 
b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c
index f1f70ed7b5c..9c96249050d 100644
--- a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c
+++ b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_3.c
@@ -32,6 +32,10 @@
 #error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is defined but should not be!"
+#endif
+
 #pragma GCC push_options
 #pragma GCC target ("arch=armv8.2-a+sve")
 
@@ -63,6 +67,10 @@
 #error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is defined but should not be!"
+#endif
+
 #pragma GCC pop_options
 
 #pragma GCC push_options
@@ -96,6 +104,10 @@
 #error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is defined but should not be!"
+#endif
+
 #pragma GCC pop_options
 
 #pragma GCC push_options
@@ -287,6 +299,47 @@
 #error "__ARM_FEATURE_SVE2p1 is not defined but should be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is defined but should not be!"
+#endif
+
+#pragma GCC pop_options
+
+#pragma GCC push_options
+#pragma GCC target ("arch=armv9-a+sve2p2")
+
+#ifndef __ARM_FEATURE_SVE
+#error "__ARM_FEATURE_SVE is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2
+#error "__ARM_FEATURE_SVE2 is not defined but should be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_AES
+#error "__ARM_FEATURE_SVE2_AES is defined but should not be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_BITPERM
+#error "__ARM_FEATURE_SVE2_BITPERM is defined but should not be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_SHA3
+#error "__ARM_FEATURE_SVE2_SHA3 is defined but should not be!"
+#endif
+
+#ifdef __ARM_FEATURE_SVE2_SM4
+#error "__ARM_FEATURE_SVE2_SM4 is defined but should not be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is not defined but should be!"
+#endif
+
 #pragma GCC pop_options
 
 #pragma GCC push_options
@@ -320,6 +373,48 @@
 #error "__ARM_FEATURE_SVE2p1 is not defined but should be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is defined but should not be!"
+#endif
+
+#pragma GCC pop_options
+
+#pragma GCC push_options
+#pragma GCC target 
("arch=armv9-a+sve2-aes+sve2-bitperm+sve2-sha3+sve2-sm4+sve2p1+sve2p2")
+
+#ifndef __ARM_FEATURE_SVE
+#error "__ARM_FEATURE_SVE is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2
+#error "__ARM_FEATURE_SVE2 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_AES
+#error "__ARM_FEATURE_SVE2_AES is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_BITPERM
+#error "__ARM_FEATURE_SVE2_BITPERM is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_SHA3
+#error "__ARM_FEATURE_SVE2_SHA3 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2_SM4
+#error "__ARM_FEATURE_SVE2_SM4 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2p1
+#error "__ARM_FEATURE_SVE2p1 is not defined but should be!"
+#endif
+
+#ifndef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is not defined but should be!"
+#endif
+
+
 #pragma GCC push_options
 #pragma GCC target ("general-regs-only")
 
@@ -351,6 +446,11 @@
 #error "__ARM_FEATURE_SVE2p1 is defined but should not be!"
 #endif
 
+#ifdef __ARM_FEATURE_SVE2p2
+#error "__ARM_FEATURE_SVE2p2 is defined but should not be!"
+#endif
+
+
 #pragma GCC pop_options
 
 #pragma GCC pop_options
diff --git a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_4.c 
b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_4.c
index d3630de955d..d7976e3f1b1 100644
--- a/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_4.c
+++ b/gcc/testsuite/gcc.target/aarch64/pragma_cpp_predefs_4.c
@@ -218,6 +218,20 @@
 #error Foo
 #endif
 
+#pragma GCC target "+nothing+sve2+sme2p2"
+#ifndef __ARM_FEATURE_SME
+#error Foo
+#endif
+#ifndef __ARM_FEATURE_SME2
+#error Foo
+#endif
+#ifndef __ARM_FEATURE_SME2p1
+#error Foo
+#endif
+#ifndef __ARM_FEATURE_SME2p2
+#error Foo
+#endif
+
 #pragma GCC target "+nothing+sve2+sme-mop4"
 #ifndef __ARM_FEATURE_SME_MOP4
 #error "__ARM_FEATURE_SME_MOP4 not defined"
diff --git a/gcc/testsuite/lib/target-supports.exp 
b/gcc/testsuite/lib/target-supports.exp
index 384ec440f65..f0def086a30 100644
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -6652,6 +6652,23 @@ proc check_effective_target_aarch64_sve2p1_hw { } {
     }]
 }
 
+# Return true if this is an AArch64 target that can run SVE2.2 code.
+
+proc check_effective_target_aarch64_sve2p2_hw { } {
+    if { ![istarget aarch64*-*-*] } {
+       return 0
+    }
+    return [check_runtime aarch64_sve2p2_hw_available {
+       #pragma GCC target "+sve2p2"
+       int
+       main (void)
+       {
+         asm volatile ("compact z0.b, p0, z1.b");
+         return 0;
+       }
+    }]
+}
+
 # Return true if this is an AArch64 target that can run SVE code and
 # if its SVE vectors have exactly BITS bits.
 
@@ -12731,7 +12748,7 @@ set exts {
 # archiecture for SME and the features that require it.
 set exts_sve2 {
     "sme-f8f16" "sme-f8f32"
-    "sme-b16b16" "sme-f16f16" "sme-i16i64" "sme" "sme2" "sme2p1"
+    "sme-b16b16" "sme-f16f16" "sme-i16i64" "sme" "sme2" "sme2p1" "sme2p2"
     "ssve-fp8dot2" "ssve-fp8dot4" "ssve-fp8fma" "sve-bfscale"
     "sme-tmop" "ssve-bitperm"
 }
@@ -12784,6 +12801,16 @@ proc check_effective_target_aarch64_asm_sve2p1_ok { } {
     }
 }
 
+proc check_effective_target_aarch64_asm_sve2p2_ok { } {
+    if { [istarget aarch64*-*-*] } {
+       return [check_no_compiler_messages aarch64_sve2p2_assembler object {
+           __asm__ (".arch_extension sve2p2; compact z0.b,p0,z1.b");
+       } "-march=armv8-a+sve2p2"]
+    } else {
+       return 0
+    }
+}
+
 proc check_effective_target_aarch64_small { } {
     if { [istarget aarch64*-*-*] } {
        return [check_no_compiler_messages aarch64_small object {
-- 
2.43.0

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