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tcg: Add TCG_CALL_NO_RETURN

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Remember which helpers have been marked noreturn.

Backports commit 15d7409260498505e991e7b9d87118627165e613 from qemu
This commit is contained in:
Richard Henderson 2019-01-05 06:35:20 -05:00 committed by Lioncash
parent 7dbbf58653
commit 80b4bef1cc
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GPG key ID: 4E3C3CC1031BA9C7
3 changed files with 22 additions and 7 deletions
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13
qemu/include/exec/helper-head.h
View file

@ -107,6 +107,19 @@
#define dh_is_signed_env dh_is_signed_ptr
#define dh_is_signed(t) dh_is_signed_##t
#define dh_callflag_i32 0
#define dh_callflag_s32 0
#define dh_callflag_int 0
#define dh_callflag_i64 0
#define dh_callflag_s64 0
#define dh_callflag_f16 0
#define dh_callflag_f32 0
#define dh_callflag_f64 0
#define dh_callflag_ptr 0
#define dh_callflag_void 0
#define dh_callflag_noreturn TCG_CALL_NO_RETURN
#define dh_callflag(t) glue(dh_callflag_, dh_alias(t))
#define dh_sizemask(t, n) \
((dh_is_64bit(t) << (n*2)) | (dh_is_signed(t) << (n*2+1)))

14
qemu/include/exec/helper-tcg.h
View file

@ -11,36 +11,36 @@
#define str(s) #s
#define DEF_HELPER_FLAGS_0(NAME, FLAGS, ret) \
{ HELPER(NAME), str(#NAME), FLAGS, \
{ HELPER(NAME), str(#NAME), FLAGS | dh_callflag(ret), \
dh_sizemask(ret, 0) },
#define DEF_HELPER_FLAGS_1(NAME, FLAGS, ret, t1) \
{ HELPER(NAME), str(#NAME), FLAGS, \
{ HELPER(NAME), str(#NAME), FLAGS | dh_callflag(ret), \
dh_sizemask(ret, 0) | dh_sizemask(t1, 1) },
#define DEF_HELPER_FLAGS_2(NAME, FLAGS, ret, t1, t2) \
{ HELPER(NAME), str(#NAME), FLAGS, \
{ HELPER(NAME), str(#NAME), FLAGS | dh_callflag(ret), \
dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
| dh_sizemask(t2, 2) },
#define DEF_HELPER_FLAGS_3(NAME, FLAGS, ret, t1, t2, t3) \
{ HELPER(NAME), str(#NAME), FLAGS, \
{ HELPER(NAME), str(#NAME), FLAGS | dh_callflag(ret), \
dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) },
#define DEF_HELPER_FLAGS_4(NAME, FLAGS, ret, t1, t2, t3, t4) \
{ HELPER(NAME), str(#NAME), FLAGS, \
{ HELPER(NAME), str(#NAME), FLAGS | dh_callflag(ret), \
dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) },
#define DEF_HELPER_FLAGS_5(NAME, FLAGS, ret, t1, t2, t3, t4, t5) \
{ HELPER(NAME), str(#NAME), FLAGS, \
{ HELPER(NAME), str(#NAME), FLAGS | dh_callflag(ret), \
dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
| dh_sizemask(t5, 5) },
#define DEF_HELPER_FLAGS_6(NAME, FLAGS, ret, t1, t2, t3, t4, t5, t6) \
{ HELPER(NAME), str(NAME), FLAGS, \
{ HELPER(NAME), str(NAME), FLAGS | dh_callflag(ret), \
dh_sizemask(ret, 0) | dh_sizemask(t1, 1) \
| dh_sizemask(t2, 2) | dh_sizemask(t3, 3) | dh_sizemask(t4, 4) \
| dh_sizemask(t5, 5) | dh_sizemask(t6, 6) },

2
qemu/tcg/tcg.h
View file

@ -474,6 +474,8 @@ typedef TCGv_ptr TCGv_env;
#define TCG_CALL_NO_WRITE_GLOBALS 0x0002
/* Helper can be safely suppressed if the return value is not used. */
#define TCG_CALL_NO_SIDE_EFFECTS 0x0004
/* Helper is QEMU_NORETURN. */
#define TCG_CALL_NO_RETURN 0x0008
/* convenience version of most used call flags */
#define TCG_CALL_NO_RWG TCG_CALL_NO_READ_GLOBALS