mirrors
/
qemu
mirror of https://gitlab.com/qemu-project/qemu
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

tcg: declare internal helpers as const and pure 

TCG internal helpers only access to the values passed in arguments, and
do not modify the CPU internal state. Thus they can be declared as
const and pure.

Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2010-03-14 23:01:01 +01:00
parent 39324ca488
commit dbfff4deb5
1 changed files with 9 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
tcg/tcg-op.h
View File

@ -364,7 +364,11 @@ static inline void tcg_gen_helperN(void *func, int flags, int sizemask,
tcg_temp_free_ptr(fn);
}
/* FIXME: Should this be pure? */
/* Note: Both tcg_gen_helper32() and tcg_gen_helper64() are currently
reserved for helpers in tcg-runtime.c. These helpers are all const
and pure, hence the call to tcg_gen_callN() with TCG_CALL_CONST |
TCG_CALL_PURE. This may need to be adjusted if these functions
start to be used with other helpers. */
static inline void tcg_gen_helper32(void *func, TCGv_i32 ret,
TCGv_i32 a, TCGv_i32 b)
{
@ -373,11 +377,11 @@ static inline void tcg_gen_helper32(void *func, TCGv_i32 ret,
fn = tcg_const_ptr((tcg_target_long)func);
args[0] = GET_TCGV_I32(a);
args[1] = GET_TCGV_I32(b);
tcg_gen_callN(&tcg_ctx, fn, 0, 0, GET_TCGV_I32(ret), 2, args);
tcg_gen_callN(&tcg_ctx, fn, TCG_CALL_CONST | TCG_CALL_PURE,
0, GET_TCGV_I32(ret), 2, args);
tcg_temp_free_ptr(fn);
}
/* FIXME: Should this be pure? */
static inline void tcg_gen_helper64(void *func, TCGv_i64 ret,
TCGv_i64 a, TCGv_i64 b)
{
@ -386,7 +390,8 @@ static inline void tcg_gen_helper64(void *func, TCGv_i64 ret,
fn = tcg_const_ptr((tcg_target_long)func);
args[0] = GET_TCGV_I64(a);
args[1] = GET_TCGV_I64(b);
tcg_gen_callN(&tcg_ctx, fn, 0, 7, GET_TCGV_I64(ret), 2, args);
tcg_gen_callN(&tcg_ctx, fn, TCG_CALL_CONST | TCG_CALL_PURE,
7, GET_TCGV_I64(ret), 2, args);
tcg_temp_free_ptr(fn);
}