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target/riscv: update mstatus.SD when FS is set dirty

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remove the check becuase SD bit should summarize FS and XS fields
unconditionally.

Signed-off-by: ShihPo Hung <shihpo.hung@sifive.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
ShihPo Hung 2020-01-14 22:17:33 -08:00 committed by Palmer Dabbelt
parent a59796eb6d
commit 82f014671c
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GPG Key ID: 2E1319F35FBB1889
2 changed files with 2 additions and 3 deletions
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3
target/riscv/csr.c
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@ -341,8 +341,7 @@ static int write_mstatus(CPURISCVState *env, int csrno, target_ulong val)
mstatus = (mstatus & ~mask) | (val & mask);
dirty = (riscv_cpu_fp_enabled(env) &&
((mstatus & MSTATUS_FS) == MSTATUS_FS)) |
dirty = ((mstatus & MSTATUS_FS) == MSTATUS_FS) |
((mstatus & MSTATUS_XS) == MSTATUS_XS);
mstatus = set_field(mstatus, MSTATUS_SD, dirty);
env->mstatus = mstatus;

2
target/riscv/translate.c
View File

@ -394,7 +394,7 @@ static void mark_fs_dirty(DisasContext *ctx)
tmp = tcg_temp_new();
tcg_gen_ld_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus));
tcg_gen_ori_tl(tmp, tmp, MSTATUS_FS);
tcg_gen_ori_tl(tmp, tmp, MSTATUS_FS | MSTATUS_SD);
tcg_gen_st_tl(tmp, cpu_env, offsetof(CPURISCVState, mstatus));
tcg_temp_free(tmp);
}