diff options
| author | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-16 13:12:20 +0200 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2012-09-21 19:53:16 +0200 |
| commit | ad8d25a11f13cb8acc69558d03cd69202f5a3cc2 (patch) | |
| tree | 05f1d6d9cd83669476ae546b87c0a4d83cd26a2d /target-sh4/op_helper.c | |
| parent | 22b88fd77e2fbb8aefb6e50a6a24d670b0ecb022 (diff) | |
target-sh4: implement addv and subv using TCG
addv and subv helpers implementation is directly copied from the SH4
manual and looks quite complex. It is however possible to explain it
without branches, and is therefore possible to implement it with TCG.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Diffstat (limited to 'target-sh4/op_helper.c')
| -rw-r--r-- | target-sh4/op_helper.c | 58 |
1 files changed, 0 insertions, 58 deletions
diff --git a/target-sh4/op_helper.c b/target-sh4/op_helper.c index 3ad10bab94..4f1f754680 100644 --- a/target-sh4/op_helper.c +++ b/target-sh4/op_helper.c @@ -177,35 +177,6 @@ void helper_ocbi(CPUSH4State *env, uint32_t address) } } -uint32_t helper_addv(CPUSH4State *env, uint32_t arg0, uint32_t arg1) -{ - uint32_t dest, src, ans; - - if ((int32_t) arg1 >= 0) - dest = 0; - else - dest = 1; - if ((int32_t) arg0 >= 0) - src = 0; - else - src = 1; - src += dest; - arg1 += arg0; - if ((int32_t) arg1 >= 0) - ans = 0; - else - ans = 1; - ans += dest; - if (src == 0 || src == 2) { - if (ans == 1) - env->sr |= SR_T; - else - env->sr &= ~SR_T; - } else - env->sr &= ~SR_T; - return arg1; -} - #define T (env->sr & SR_T) #define Q (env->sr & SR_Q ? 1 : 0) #define M (env->sr & SR_M ? 1 : 0) @@ -359,35 +330,6 @@ void helper_macw(CPUSH4State *env, uint32_t arg0, uint32_t arg1) } } -uint32_t helper_subv(CPUSH4State *env, uint32_t arg0, uint32_t arg1) -{ - int32_t dest, src, ans; - - if ((int32_t) arg1 >= 0) - dest = 0; - else - dest = 1; - if ((int32_t) arg0 >= 0) - src = 0; - else - src = 1; - src += dest; - arg1 -= arg0; - if ((int32_t) arg1 >= 0) - ans = 0; - else - ans = 1; - ans += dest; - if (src == 1) { - if (ans == 1) - env->sr |= SR_T; - else - env->sr &= ~SR_T; - } else - env->sr &= ~SR_T; - return arg1; -} - static inline void set_t(CPUSH4State *env) { env->sr |= SR_T; |