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e2k: Fix signed integer division. 

Do not raise an x86 exception when the minimum signed
integer is divisible by minus one.

Signed-off-by: Denis Drakhnya <numas13@gmail.com>
This commit is contained in:
Denis Drakhnia 2021-02-20 17:10:14 +02:00 committed by Denis Drakhnia
parent 374e658eb1
commit 88fed7c276
1 changed files with 39 additions and 28 deletions
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67
target/e2k/translate/alc.c
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@ -1349,35 +1349,46 @@ static inline void gen_udivs(TCGv_i32 ret, TCGv_i32 ret_tag, TCGv_i32 tag,
gen_set_label(l0);
}
static inline void gen_sdivd(TCGv_i64 ret, TCGv_i32 ret_tag, TCGv_i32 tag,
TCGv_i64 src1, TCGv_i64 src2)
{
TCGLabel *l0 = gen_new_label();
TCGLabel *l1 = gen_new_label();
tcg_gen_brcondi_i64(TCG_COND_NE, src2, 0, l1);
tcg_gen_movi_i32(ret_tag, 5);
tcg_gen_movi_i64(ret, 0);
tcg_gen_br(l0);
gen_set_label(l1);
tcg_gen_mov_i32(ret_tag, tag);
tcg_gen_div_i64(ret, src1, src2);
gen_set_label(l0);
}
#define IMPL_GEN_SDIV(name, S, T, bad_tag) \
static inline void name(T ret, TCGv_i32 ret_tag, \
TCGv_i32 tag, T src1, T src2) \
{ \
TCGLabel *l0 = gen_new_label(); \
TCGLabel *l1 = gen_new_label(); \
T t0 = glue(tcg_temp_new_i, S)(); \
T t1 = glue(tcg_temp_new_i, S)(); \
T t2 = glue(tcg_temp_new_i, S)(); \
T t3 = glue(tcg_temp_new_i, S)(); \
T t4 = glue(tcg_temp_new_i, S)(); \
\
glue(tcg_gen_brcondi_i, S)(TCG_COND_NE, src2, 0, l1); \
/* src2 is zero */ \
tcg_gen_movi_i32(ret_tag, bad_tag); \
glue(tcg_gen_movi_i, S)(ret, 0); \
tcg_gen_br(l0); \
\
/* src2 is not zero */ \
gen_set_label(l1); \
glue(tcg_gen_setcondi_i, S)(TCG_COND_EQ, t0, src1, 1ULL << (S - 1)); \
glue(tcg_gen_setcondi_i, S)(TCG_COND_EQ, t1, src2, -1); \
glue(tcg_gen_and_i, S)(t2, t0, t1); \
glue(tcg_gen_movi_i, S)(t3, 0); \
glue(tcg_gen_movcond_i, S)(TCG_COND_NE, t4, t2, t3, t2, src2); \
\
tcg_gen_mov_i32(ret_tag, tag); \
glue(tcg_gen_div_i, S)(ret, src1, t4); \
\
gen_set_label(l0); \
\
glue(tcg_temp_free_i, S)(t4); \
glue(tcg_temp_free_i, S)(t3); \
glue(tcg_temp_free_i, S)(t2); \
glue(tcg_temp_free_i, S)(t1); \
glue(tcg_temp_free_i, S)(t0); \
}
static inline void gen_sdivs(TCGv_i32 ret, TCGv_i32 ret_tag, TCGv_i32 tag,
TCGv_i32 src1, TCGv_i32 src2)
{
TCGLabel *l0 = gen_new_label();
TCGLabel *l1 = gen_new_label();
tcg_gen_brcondi_i32(TCG_COND_NE, src2, 0, l1);
tcg_gen_movi_i32(ret_tag, 5);
tcg_gen_movi_i32(ret, 0);
tcg_gen_br(l0);
gen_set_label(l1);
tcg_gen_mov_i32(ret_tag, tag);
tcg_gen_div_i32(ret, src1, src2);
gen_set_label(l0);
}
IMPL_GEN_SDIV(gen_sdivd, 64, TCGv_i64, E2K_TAG_NON_NUMBER64)
IMPL_GEN_SDIV(gen_sdivs, 32, TCGv_i32, E2K_TAG_NON_NUMBER32)
static inline void gen_gettag_i64(Instr *instr)
{