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target/sh4: return result of fcmp using TCG 

Since that the T bit of the SR register is mapped using a TGC global,
it's better to return the value through TCG than writing it directly. It
allows to declare the helpers with the flag TCG_CALL_NO_WG.

Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170702202814.27793-5-aurelien@aurel32.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Aurelien Jarno 2017-07-02 21:31:25 +02:00
parent 82e8251374
commit 92f1f83e34
3 changed files with 18 additions and 16 deletions
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8
target/sh4/helper.h
View File

@ -21,10 +21,10 @@ DEF_HELPER_FLAGS_3(fadd_DT, TCG_CALL_NO_WG, f64, env, f64, f64)
DEF_HELPER_FLAGS_2(fcnvsd_FT_DT, TCG_CALL_NO_WG, f64, env, f32)
DEF_HELPER_FLAGS_2(fcnvds_DT_FT, TCG_CALL_NO_WG, f32, env, f64)
DEF_HELPER_3(fcmp_eq_FT, void, env, f32, f32)
DEF_HELPER_3(fcmp_eq_DT, void, env, f64, f64)
DEF_HELPER_3(fcmp_gt_FT, void, env, f32, f32)
DEF_HELPER_3(fcmp_gt_DT, void, env, f64, f64)
DEF_HELPER_FLAGS_3(fcmp_eq_FT, TCG_CALL_NO_WG, i32, env, f32, f32)
DEF_HELPER_FLAGS_3(fcmp_eq_DT, TCG_CALL_NO_WG, i32, env, f64, f64)
DEF_HELPER_FLAGS_3(fcmp_gt_FT, TCG_CALL_NO_WG, i32, env, f32, f32)
DEF_HELPER_FLAGS_3(fcmp_gt_DT, TCG_CALL_NO_WG, i32, env, f64, f64)
DEF_HELPER_FLAGS_3(fdiv_FT, TCG_CALL_NO_WG, f32, env, f32, f32)
DEF_HELPER_FLAGS_3(fdiv_DT, TCG_CALL_NO_WG, f64, env, f64, f64)
DEF_HELPER_FLAGS_2(float_FT, TCG_CALL_NO_WG, f32, env, i32)

16
target/sh4/op_helper.c
View File

@ -268,44 +268,44 @@ float64 helper_fadd_DT(CPUSH4State *env, float64 t0, float64 t1)
return t0;
}
void helper_fcmp_eq_FT(CPUSH4State *env, float32 t0, float32 t1)
uint32_t helper_fcmp_eq_FT(CPUSH4State *env, float32 t0, float32 t1)
{
int relation;
set_float_exception_flags(0, &env->fp_status);
relation = float32_compare(t0, t1, &env->fp_status);
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_equal);
return relation == float_relation_equal;
}
void helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1)
uint32_t helper_fcmp_eq_DT(CPUSH4State *env, float64 t0, float64 t1)
{
int relation;
set_float_exception_flags(0, &env->fp_status);
relation = float64_compare(t0, t1, &env->fp_status);
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_equal);
return relation == float_relation_equal;
}
void helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1)
uint32_t helper_fcmp_gt_FT(CPUSH4State *env, float32 t0, float32 t1)
{
int relation;
set_float_exception_flags(0, &env->fp_status);
relation = float32_compare(t0, t1, &env->fp_status);
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_greater);
return relation == float_relation_greater;
}
void helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1)
uint32_t helper_fcmp_gt_DT(CPUSH4State *env, float64 t0, float64 t1)
{
int relation;
set_float_exception_flags(0, &env->fp_status);
relation = float64_compare(t0, t1, &env->fp_status);
update_fpscr(env, GETPC());
env->sr_t = (relation == float_relation_greater);
return relation == float_relation_greater;
}
float64 helper_fcnvsd_FT_DT(CPUSH4State *env, float32 t0)

10
target/sh4/translate.c
View File

@ -1077,10 +1077,10 @@ static void _decode_opc(DisasContext * ctx)
gen_helper_fdiv_DT(fp0, cpu_env, fp0, fp1);
break;
case 0xf004: /* fcmp/eq Rm,Rn */
gen_helper_fcmp_eq_DT(cpu_env, fp0, fp1);
gen_helper_fcmp_eq_DT(cpu_sr_t, cpu_env, fp0, fp1);
return;
case 0xf005: /* fcmp/gt Rm,Rn */
gen_helper_fcmp_gt_DT(cpu_env, fp0, fp1);
gen_helper_fcmp_gt_DT(cpu_sr_t, cpu_env, fp0, fp1);
return;
}
gen_store_fpr64(fp0, DREG(B11_8));
@ -1109,11 +1109,13 @@ static void _decode_opc(DisasContext * ctx)
cpu_fregs[FREG(B7_4)]);
break;
case 0xf004: /* fcmp/eq Rm,Rn */
gen_helper_fcmp_eq_FT(cpu_env, cpu_fregs[FREG(B11_8)],
gen_helper_fcmp_eq_FT(cpu_sr_t, cpu_env,
cpu_fregs[FREG(B11_8)],
cpu_fregs[FREG(B7_4)]);
return;
case 0xf005: /* fcmp/gt Rm,Rn */
gen_helper_fcmp_gt_FT(cpu_env, cpu_fregs[FREG(B11_8)],
gen_helper_fcmp_gt_FT(cpu_sr_t, cpu_env,
cpu_fregs[FREG(B11_8)],
cpu_fregs[FREG(B7_4)]);
return;
}