On 2/23/23 05:24, Peter Maydell wrote:
On Thu, 16 Feb 2023 at 03:10, Richard Henderson
<[email protected]> wrote:

This fixes a bug in that these two insns should have been using atomic
16-byte stores, since MTE is ARMv8.5 and LSE2 is mandatory from ARMv8.4.

Signed-off-by: Richard Henderson <[email protected]>

diff --git a/tests/tcg/aarch64/mte-7.c b/tests/tcg/aarch64/mte-7.c
index a981de62d4..04974f9ebb 100644
--- a/tests/tcg/aarch64/mte-7.c
+++ b/tests/tcg/aarch64/mte-7.c
@@ -19,8 +19,7 @@ int main(int ac, char **av)
      p = (void *)((unsigned long)p | (1ul << 56));

      /* Store tag in sequential granules. */
-    asm("stg %0, [%0]" : : "r"(p + 0x0ff0));
-    asm("stg %0, [%0]" : : "r"(p + 0x1000));
+    asm("stz2g %0, [%0]" : : "r"(p + 0x0ff0));

Why did we need to change the test program ?

It gives us a test of the stz2g insn.  We still have other instances of stg in 
the testsuite.


r~


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