testsuite: LoongArch: Enable 16B atomic tests if the test machine supports LSX and SCQ

Enable those tests so we won't make too stupid mistakes in 16B atomic
implementation anymore.

All these test passed on a Loongson 3C6000/S except
atomic-other-int128.c.  With GDB patched to support sc.q
(https://sourceware.org/pipermail/gdb-patches/2025-August/220034.html)
this test also XPASS.

gcc/testsuite/ChangeLog:

	* lib/target-supports.exp
	(check_effective_target_loongarch_scq_hw): New.
	(check_effective_target_sync_int_128_runtime): Return 1 on
	loongarch64-*-* if hardware supports both LSX and SCQ.
	* gcc.dg/atomic-compare-exchange-5.c: Pass -mlsx -mscq for
	loongarch64-*-*.
	* gcc.dg/atomic-exchange-5.c: Likewise.
	* gcc.dg/atomic-load-5.c: Likewise.
	* gcc.dg/atomic-op-5.c: Likewise.
	* gcc.dg/atomic-store-5.c: Likewise.
	* gcc.dg/atomic-store-6.c: Likewise.
	* gcc.dg/simulate-thread/atomic-load-int128.c: Likewise.
	* gcc.dg/simulate-thread/atomic-other-int128.c: Likewise.
	(dg-final): xfail on loongarch64-*-* because  gdb does not
	handle sc.q properly yet.

diff --git a/gcc/testsuite/gcc.dg/atomic-compare-exchange-5.c b/gcc/testsuite/gcc.dg/atomic-compare-exchange-5.c
index f5d071affe8f7d92a37efce333d9cfd0fb0b00c9..8d0b46262183c2348816f5ab10b79630fee69ccc 100644 (file)
--- a/gcc/testsuite/gcc.dg/atomic-compare-exchange-5.c
+++ b/gcc/testsuite/gcc.dg/atomic-compare-exchange-5.c
@@ -3,6 +3,7 @@
 /* { dg-do run } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
 
 /* Test the execution of __atomic_compare_exchange_n builtin for an int_128.  */
 

diff --git a/gcc/testsuite/gcc.dg/atomic-exchange-5.c b/gcc/testsuite/gcc.dg/atomic-exchange-5.c
index 190377f0cd55151b7035a62b280d40c9f10aa0de..ec3837dfdcf0050873f6f3eca1b533a99097d482 100644 (file)
--- a/gcc/testsuite/gcc.dg/atomic-exchange-5.c
+++ b/gcc/testsuite/gcc.dg/atomic-exchange-5.c
@@ -3,6 +3,7 @@
 /* { dg-do run } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
 
 /* Test the execution of the __atomic_X builtin for a 16 byte value.  */
 

diff --git a/gcc/testsuite/gcc.dg/atomic-load-5.c b/gcc/testsuite/gcc.dg/atomic-load-5.c
index d37d6424892741ff8ca452f037358f30b5900320..1cb2baabc7d10c06f6e08c6f238da3c59acbc0b8 100644 (file)
--- a/gcc/testsuite/gcc.dg/atomic-load-5.c
+++ b/gcc/testsuite/gcc.dg/atomic-load-5.c
@@ -3,6 +3,7 @@
 /* { dg-do run } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
 
 extern void abort(void);
 

diff --git a/gcc/testsuite/gcc.dg/atomic-op-5.c b/gcc/testsuite/gcc.dg/atomic-op-5.c
index 1407f3fe3b24e0da1a01b2eae4dd51abb9ba2611..4c6dcef8bf238df8ff6821378c4723069303abac 100644 (file)
--- a/gcc/testsuite/gcc.dg/atomic-op-5.c
+++ b/gcc/testsuite/gcc.dg/atomic-op-5.c
@@ -3,6 +3,7 @@
 /* { dg-do run } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
 
 /* Test the execution of the __atomic_*OP builtin routines for an int_128.  */
 

diff --git a/gcc/testsuite/gcc.dg/atomic-store-5.c b/gcc/testsuite/gcc.dg/atomic-store-5.c
index a855182bf49c6c5cbc665babfc01705423edf193..4bc379c722b2369f0673c9148b1f141bcc3deef3 100644 (file)
--- a/gcc/testsuite/gcc.dg/atomic-store-5.c
+++ b/gcc/testsuite/gcc.dg/atomic-store-5.c
@@ -3,6 +3,7 @@
 /* { dg-do run } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
 
 /* Test the execution of the __atomic_store_n builtin for a 16 byte value.  */
 

diff --git a/gcc/testsuite/gcc.dg/atomic-store-6.c b/gcc/testsuite/gcc.dg/atomic-store-6.c
index 81499cd716b34e11c0faaa8da98eb8c725480a7b..78bf2aa02f5dc1d4efe09a571e8ffdd297dce190 100644 (file)
--- a/gcc/testsuite/gcc.dg/atomic-store-6.c
+++ b/gcc/testsuite/gcc.dg/atomic-store-6.c
@@ -1,6 +1,7 @@
 /* { dg-do run } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { i?86-*-* x86_64-*-* } } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
 
 __int128_t i;
 

diff --git a/gcc/testsuite/gcc.dg/simulate-thread/atomic-load-int128.c b/gcc/testsuite/gcc.dg/simulate-thread/atomic-load-int128.c
index 759a83d22f76614eb16b1473e61b6952b22887bd..6adc7d96620137d891a9f25d1979e840323ef8f2 100644 (file)
--- a/gcc/testsuite/gcc.dg/simulate-thread/atomic-load-int128.c
+++ b/gcc/testsuite/gcc.dg/simulate-thread/atomic-load-int128.c
@@ -1,6 +1,7 @@
 /* { dg-do link } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { x86_64-*-* i?86-*-* } } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
 /* { dg-final { simulate-thread } } */
 
 #include <stdio.h>

diff --git a/gcc/testsuite/gcc.dg/simulate-thread/atomic-other-int128.c b/gcc/testsuite/gcc.dg/simulate-thread/atomic-other-int128.c
index 6aaaa88ef0494632befed5cc8dc72e0feecd4822..5538fa1ff924b2b14050f5a8a5b5458875ed98bc 100644 (file)
--- a/gcc/testsuite/gcc.dg/simulate-thread/atomic-other-int128.c
+++ b/gcc/testsuite/gcc.dg/simulate-thread/atomic-other-int128.c
@@ -1,7 +1,12 @@
 /* { dg-do link } */
 /* { dg-require-effective-target sync_int_128_runtime } */
 /* { dg-options "-mcx16" { target { x86_64-*-* i?86-*-* } } } */
-/* { dg-final { simulate-thread } } */
+/* { dg-options "-mlsx -mscq" { target { loongarch64-*-* } } } */
+
+/* xfail on loongarch64 until the new GDB versions with
+   https://sourceware.org/pipermail/gdb-patches/2025-August/220034.html
+   is widely used by distros.  */
+/* { dg-final { simulate-thread { xfail loongarch64-*-* } } } */
 
 #include <stdio.h>
 #include "simulate-thread.h"

diff --git a/gcc/testsuite/lib/target-supports.exp b/gcc/testsuite/lib/target-supports.exp
index 957fa7f3599e8965ed4c8e287bcbc740d70262e9..1acfb373bebb9050d41f67c63eb48f4e6b3284e1 100644 (file)
--- a/gcc/testsuite/lib/target-supports.exp
+++ b/gcc/testsuite/lib/target-supports.exp
@@ -10053,7 +10053,13 @@ proc check_effective_target_sync_int_128 { } {
 # This requires support for both compare-and-swap and true atomic loads.
 
 proc check_effective_target_sync_int_128_runtime { } {
-    return 0
+    if { [istarget loongarch64-*-*]
+        && [check_effective_target_loongarch_sx_hw]
+        && [check_effective_target_loongarch_scq_hw] } {
+       return 1
+    } else {
+       return 0
+    }
 }
 
 # Return 1 if the target supports atomic operations on "long long".
@@ -14314,6 +14320,18 @@ proc check_effective_target_loongarch_asx_hw { } {
     } "-mlasx"]
 }
 
+proc check_effective_target_loongarch_scq_hw { } {
+    return [check_runtime loongarch_scq_hw {
+       #include <larchintrin.h>
+       int main (void)
+       {
+         if (__cpucfg (2) & (1 << 30))
+           return 0;
+         __builtin_trap ();
+       }
+    } ""]
+}
+
 # Check whether LoongArch binutils supports call36 relocation.
 proc check_effective_target_loongarch_call36_support { } {
   return [check_no_compiler_messages loongarch_call36_support object {