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qemu-e2k
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target: e2k: Move helper_cur_dec to TCG.

This commit is contained in:
Denis Drakhnia 2020-11-26 14:10:55 +02:00 committed by Denis Drakhnia
parent b200334479
commit 8aa929e289
3 changed files with 21 additions and 19 deletions
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10
target/e2k/helper.c
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@ -332,13 +332,3 @@ uint64_t helper_getsp(CPUE2KState *env, uint64_t src2) {
return base;
}
uint32_t helper_cur_dec(CPUE2KState *env, uint32_t cur, uint32_t n,
uint32_t size)
{
if (size == 0) {
helper_raise_exception(env, E2K_EXCP_MAPERR);
}
return size - (size + n - cur) % size;
}

1
target/e2k/helper.h
View File

@ -7,5 +7,4 @@ DEF_HELPER_1(debug_i64, void, i64)
DEF_HELPER_2(state_reg_get, i64, env, int)
DEF_HELPER_3(state_reg_set, void, env, int, i64)
DEF_HELPER_2(getsp, i64, env, i64) /* FIXME: return tl? */
DEF_HELPER_4(cur_dec, i32, env, i32, i32, i32)
DEF_HELPER_1(break_restore_state, void, env)

29
target/e2k/translate/control.c
View File

@ -94,21 +94,34 @@ static inline void gen_movcond_flag_i64(TCGv_i64 ret, int flag, TCGv_i64 cond,
tcg_temp_free_i64(one);
}
static inline void gen_cur_dec(DisasContext *ctx, TCGv_i32 ret, int cond,
TCGv_i32 cur, int n,
static inline void gen_dec_wrap(TCGv_i32 ret, TCGv_i32 cur, int n,
TCGv_i32 size)
{
TCGv_i32 c = tcg_temp_new_i32();
TCGv_i32 t0 = tcg_const_i32(n);
TCGv_i32 t0 = tcg_temp_new_i32();
tcg_gen_addi_i32(t0, size, n);
tcg_gen_sub_i32(t0, t0, cur);
tcg_gen_remu_i32(t0, t0, size);
tcg_gen_sub_i32(ret, size, t0);
tcg_temp_free_i32(t0);
}
static inline void gen_cur_dec(DisasContext *ctx, TCGv_i32 ret, int cond,
TCGv_i32 cur, int n, TCGv_i32 size)
{
TCGLabel *l0 = gen_new_label();
TCGv_i32 t0 = tcg_temp_new_i32();
TCGv_i32 t1 = tcg_temp_new_i32();
tcg_gen_trunc_tl_i32(c, e2k_cs.ct_cond);
gen_helper_cur_dec(t1, cpu_env, cur, t0, size);
gen_movcond_flag_i32(ret, cond, c, t1, cur);
tcg_gen_brcondi_i32(TCG_COND_EQ, size, 0, l0);
tcg_gen_trunc_tl_i32(t0, e2k_cs.ct_cond);
gen_dec_wrap(t1, cur, n, size);
gen_movcond_flag_i32(ret, cond, t0, t1, cur);
gen_set_label(l0);
tcg_temp_free_i32(t1);
tcg_temp_free_i32(t0);
tcg_temp_free_i32(c);
}
void e2k_commit_stubs(DisasContext *ctx)