From b5181cf53547c7fb1b54db6d159c39a1e88f9eb6 Mon Sep 17 00:00:00 2001 From: Peter Maydell Date: Thu, 13 Jun 2019 15:37:41 +0100 Subject: arm.risu: Avoid VTRN with Vd == Vm The AArch32 VTRN instruction is specified to give an UNKNOWN result if Vd and Vm are the same register; avoid generating this in risu output, as we already do for VUZP and VZIP. Signed-off-by: Peter Maydell Reviewed-by: Richard Henderson Message-id: 20190613143741.15128-1-peter.maydell@linaro.org --- arm.risu | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arm.risu b/arm.risu index 9009e6b..c16d245 100644 --- a/arm.risu +++ b/arm.risu @@ -613,7 +613,8 @@ VCLT0 A1 1111 0011 1 d 11 sz:2 01 vd:4 0 f 100 q m 0 vm:4 VABS A1 1111 0011 1 d 11 sz:2 01 vd:4 0 f 110 q m 0 vm:4 VNEG A1 1111 0011 1 d 11 sz:2 01 vd:4 0 f 111 q m 0 vm:4 VSWP A1 1111 0011 1 d 11 sz:2 10 vd:4 00000 q m 0 vm:4 -VTRN A1 1111 0011 1 d 11 sz:2 10 vd:4 00001 q m 0 vm:4 +# d == m gives UNKNOWN results, so avoid it +VTRN A1 1111 0011 1 d 11 sz:2 10 vd:4 00001 q m 0 vm:4 { ($d != $m) || ($vd != $vm); } # d == m gives UNKNOWN results, so avoid it VUZP A1 1111 0011 1 d 11 sz:2 10 vd:4 00010 q m 0 vm:4 { ($d != $m) || ($vd != $vm); } VZIP A1 1111 0011 1 d 11 sz:2 10 vd:4 00011 q m 0 vm:4 { ($d != $m) || ($vd != $vm); } -- cgit v1.2.3