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target/nios2: fix page-fit instruction count 

This patch fixes calculation of number of the instructions
that fit the current page. It prevents creation of the translation
blocks that cross the page boundaries. It is required for deterministic
exception generation in icount mode.

Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgalyuk@ispras.ru>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <162072241046.823357.10485774346114851009.stgit@pasha-ThinkPad-X280>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Pavel Dovgalyuk 2021-05-11 11:40:10 +03:00 committed by Laurent Vivier
parent d7878875ae
commit dd69218949
1 changed files with 1 additions and 1 deletions
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2
target/nios2/translate.c
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@ -829,7 +829,7 @@ void gen_intermediate_code(CPUState *cs, TranslationBlock *tb, int max_insns)
/* Set up instruction counts */
num_insns = 0;
if (max_insns > 1) {
int page_insns = (TARGET_PAGE_SIZE - (tb->pc & TARGET_PAGE_MASK)) / 4;
int page_insns = (TARGET_PAGE_SIZE - (tb->pc & ~TARGET_PAGE_MASK)) / 4;
if (max_insns > page_insns) {
max_insns = page_insns;
}