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[Qemu-devel] [PATCH 2/2] target-arm: Handle UNDEF cases for Neon VLD/VST
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH 2/2] target-arm: Handle UNDEF cases for Neon VLD/VST multiple-structures |
Date: |
Mon, 18 Apr 2011 19:07:12 +0100 |
Correctly UNDEF for Neon VLD/VST "multiple structures" forms where the
align field is not valid.
Signed-off-by: Peter Maydell <address@hidden>
---
target-arm/translate.c | 15 +++++++++++++++
1 files changed, 15 insertions(+), 0 deletions(-)
diff --git a/target-arm/translate.c b/target-arm/translate.c
index 5820add..30ca7df 100644
--- a/target-arm/translate.c
+++ b/target-arm/translate.c
@@ -3830,6 +3830,21 @@ static int disas_neon_ls_insn(CPUState * env,
DisasContext *s, uint32_t insn)
size = (insn >> 6) & 3;
if (op > 10)
return 1;
+ /* Catch UNDEF cases for bad values of align field */
+ switch (op & 0xc) {
+ case 4:
+ if (((insn >> 5) & 1) == 1) {
+ return 1;
+ }
+ break;
+ case 8:
+ if (((insn >> 4) & 3) == 3) {
+ return 1;
+ }
+ break;
+ default:
+ break;
+ }
nregs = neon_ls_element_type[op].nregs;
interleave = neon_ls_element_type[op].interleave;
spacing = neon_ls_element_type[op].spacing;
--
1.7.1