[Qemu-devel] [PATCH 085/111] m68k: add fatan instruction

[Bryce Lanham]

From: Laurent Vivier <address@hidden>

allow to run gtk-demo/Color Selector/Change the above color

Signed-off-by: Laurent Vivier <address@hidden>
---
 target-m68k/helper.c    |   15 +++++++++++++++
 target-m68k/helpers.h   |    1 +
 target-m68k/translate.c |    3 +++
 3 files changed, 19 insertions(+), 0 deletions(-)

diff --git a/target-m68k/helper.c b/target-m68k/helper.c
index 70e7053..62aadfd 100644
--- a/target-m68k/helper.c
+++ b/target-m68k/helper.c
@@ -1332,6 +1332,21 @@ void HELPER(log10_FP0)(CPUState *env)
     floatx80_to_FP0(env, res);
 }
 
+void HELPER(atan_FP0)(CPUState *env)
+{
+    floatx80 res;
+    long double val;
+
+    res = FP0_to_floatx80(env);
+    val = LDOUBLE(res);
+
+    DBG_FPUH("atan_FP0 %Lg", val);
+    val = atanl(val);
+    DBG_FPU(" = %Lg", val);
+    res = FLOATx80(val);
+    floatx80_to_FP0(env, res);
+}
+
 void HELPER(sin_FP0)(CPUState *env)
 {
     floatx80 res;
diff --git a/target-m68k/helpers.h b/target-m68k/helpers.h
index c3c5eb2..46e71d2 100644
--- a/target-m68k/helpers.h
+++ b/target-m68k/helpers.h
@@ -65,6 +65,7 @@ DEF_HELPER_2(const_FP0, void, env, i32)
 DEF_HELPER_1(iround_FP0, void, env)
 DEF_HELPER_1(itrunc_FP0, void, env)
 DEF_HELPER_1(sqrt_FP0, void, env)
+DEF_HELPER_1(atan_FP0, void, env)
 DEF_HELPER_1(sin_FP0, void, env)
 DEF_HELPER_1(tan_FP0, void, env)
 DEF_HELPER_1(exp_FP0, void, env)
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 14ce1f9..d4445fe 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -3661,6 +3661,9 @@ DISAS_INSN(fpu)
     case 4: case 0x41: case 0x45: /* fsqrt */
         gen_helper_sqrt_FP0(cpu_env);
         break;
+    case 0x0a:                       /* fatan */
+        gen_helper_atan_FP0(cpu_env);
+        break;
     case 0x0e:                       /* fsin */
         gen_helper_sin_FP0(cpu_env);
         break;
-- 
1.7.2.3