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+ldapr_stlr_i instructions doesn't consider signed offset
+Description of problem:
+The format ldapr_stlr_i models the load acquire / store release immediate instructions. \
+These instructions has a bug in the sign extension calculation of the imm field. \
+imm should be defined as s9 instead of 9.
+
+@ldapr_stlr_i   .. ...... .. . imm:9 .. rn:5 rt:5 &ldapr_stlr_i
+
+Should be changed to:
+
+@ldapr_stlr_i   .. ...... .. . imm:s9 .. rn:5 rt:5 &ldapr_stlr_i
+Steps to reproduce:
+1. Run ARM target
+2. Generate any ldapr_stlr_i instructions (for example: LDAPUR)
+3. When the imm value is negative, the immediate calculation is done wrong. In case the calculation leads to an undefined location, QEMU will fail.
+Additional information:
+In trans_LDAPR_i (translate-a64.c), when imm field is negative, the value of a->imm will be 512-x instead of x. \
+I already fixed the issue by adding the s9 to the imm field. This made a call to sextend32 for imm instead of extend32 in the generated file build/libqemu-aarch64-softmmu.fa.p/decode-a64.c.inc