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authorRichard Henderson <richard.henderson@linaro.org>2020-06-25 20:31:09 -0700
committerPeter Maydell <peter.maydell@linaro.org>2020-06-26 14:31:12 +0100
commitefbc78ad978763aedd11cb718eb1ff8db3fc9152 (patch)
tree7687d7886bb24972de5eea86c79a1ec266ecd22a /target/arm/mte_helper.c
parent21a8b343eaae63f6984f9a200092b0ea167647f1 (diff)
downloadqemu-arm-efbc78ad978763aedd11cb718eb1ff8db3fc9152.tar.gz
target/arm: Implement the ADDG, SUBG instructions
Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200626033144.790098-12-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/mte_helper.c')
-rw-r--r--target/arm/mte_helper.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/target/arm/mte_helper.c b/target/arm/mte_helper.c
index 539a04de84..9ab9ed749d 100644
--- a/target/arm/mte_helper.c
+++ b/target/arm/mte_helper.c
@@ -70,3 +70,13 @@ uint64_t HELPER(irg)(CPUARMState *env, uint64_t rn, uint64_t rm)
return address_with_allocation_tag(rn, rtag);
}
+
+uint64_t HELPER(addsubg)(CPUARMState *env, uint64_t ptr,
+ int32_t offset, uint32_t tag_offset)
+{
+ int start_tag = allocation_tag_from_addr(ptr);
+ uint16_t exclude = extract32(env->cp15.gcr_el1, 0, 16);
+ int rtag = choose_nonexcluded_tag(start_tag, tag_offset, exclude);
+
+ return address_with_allocation_tag(ptr + offset, rtag);
+}