+ Aarch64: create better code for not(<byte>)

git-svn-id: https://svn.freepascal.org/svn/fpc/trunk@49135 3ad0048d-3df7-0310-abae-a5850022a9f2

1 files changed, 7 insertions, 2 deletions

diff --git a/compiler/aarch64/cgcpu.pas b/compiler/aarch64/cgcpu.pas
index 5e01f7dddc..270fc53933 100644
--- a/compiler/aarch64/cgcpu.pas
+++ b/compiler/aarch64/cgcpu.pas
@@ -1336,8 +1336,13 @@ implementation
           OP_NEG,
           OP_NOT:
             begin
-              list.concat(taicpu.op_reg_reg(TOpCG2AsmOpReg[op],dst,src));
-              maybeadjustresult(list,op,size,dst);
+              if (op=OP_NOT) and (size in [OS_8,OS_S8]) then
+                list.concat(taicpu.op_reg_reg_const(A_EOR,dst,src,255))
+              else
+                begin
+                  list.concat(taicpu.op_reg_reg(TOpCG2AsmOpReg[op],dst,src));
+                  maybeadjustresult(list,op,size,dst);
+                end;
             end
           else
             a_op_reg_reg_reg(list,op,size,src,dst,dst);