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[v2] target-xtensa: mask out undefined bits of WINDOWSTART SR

Message ID 1320240840-10872-1-git-send-email-jcmvbkbc@gmail.com
State New
Headers show

Commit Message

Max Filippov Nov. 2, 2011, 1:34 p.m. UTC 
According to ISA, table 5-156, bits 32:NAREG/4 of the WINDOWSTART SR
must be zero.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
---
v1->v2 changes: fix commit log subject
---
 target-xtensa/translate.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
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Patch

diff --git a/target-xtensa/translate.c b/target-xtensa/translate.c
index 1688bb2..b724d46 100644
--- a/target-xtensa/translate.c
+++ b/target-xtensa/translate.c
@@ -466,7 +466,7 @@  static void gen_wsr_windowbase(DisasContext *dc, uint32_t sr, TCGv_i32 v)
 
 static void gen_wsr_windowstart(DisasContext *dc, uint32_t sr, TCGv_i32 v)
 {
-    tcg_gen_mov_i32(cpu_SR[sr], v);
+    tcg_gen_andi_i32(cpu_SR[sr], v, (1 << dc->config->nareg / 4) - 1);
     reset_used_window(dc);
 }