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target-xtensa: mask out undefined bits of WINDOWSTART SR 

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>
This commit is contained in:
Max Filippov 2011-11-01 01:51:02 +04:00
parent e072ea2fd8
commit 53a72dfda5
1 changed files with 1 additions and 1 deletions
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2
target-xtensa/translate.c
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@ -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);
}