DUALNUM: Improve/fix edge cases of unary minus.HEADv2.1

Thanks to Sergey Kaplun. #1422 #1418

1 files changed, 2 insertions, 0 deletions

diff --git a/src/vm_arm64.dasc b/src/vm_arm64.dasc
index a0789efb..be8b76a7 100644
--- a/src/vm_arm64.dasc
+++ b/src/vm_arm64.dasc
@@ -2687,6 +2687,8 @@ static void build_ins(BuildCtx *ctx, BCOp op, int defop)
     |   movz CARG3, #0x41e0, lsl #48    // 2^31.
     |   add_TISNUM TMP0, TMP0
     |  csel TMP0, TMP0, CARG3, vc
+    |   movz CARG3, #0x8000, lsl #48    // -0.
+    |  csel TMP0, TMP0, CARG3, ne
     |5:
     |  str TMP0, [BASE, RA, lsl #3]
     |  ins_next