[Qemu-devel] [PATCH 082/111] m68k: add fmod instruction

[Bryce Lanham]

From: Laurent Vivier <address@hidden>

used by gnome-system-monitor.

Signed-off-by: Laurent Vivier <address@hidden>
---
 target-m68k/helper.c    |   16 ++++++++++++++++
 target-m68k/helpers.h   |    1 +
 target-m68k/translate.c |    4 ++++
 3 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/target-m68k/helper.c b/target-m68k/helper.c
index 79e6a28..70e7053 100644
--- a/target-m68k/helper.c
+++ b/target-m68k/helper.c
@@ -1537,6 +1537,22 @@ void HELPER(div_FP0_FP1)(CPUState *env)
     floatx80_to_FP0(env, res);
 }
 
+void HELPER(mod_FP0_FP1)(CPUState *env)
+{
+    floatx80 res;
+    long double src, dst;
+
+    src = LDOUBLE(FP0_to_floatx80(env));
+    dst = LDOUBLE(FP1_to_floatx80(env));
+
+    DBG_FPUH("mod_FP0_FP1 %Lg %Lg", src, dst);
+    dst = fmodl(dst, src);
+    DBG_FPU(" = %Lg\n", dst);
+
+    res = FLOATx80(dst);
+    floatx80_to_FP0(env, res);
+}
+
 void HELPER(fcmp_FP0_FP1)(CPUState *env)
 {
     /* ??? This may incorrectly raise exceptions.  */
diff --git a/target-m68k/helpers.h b/target-m68k/helpers.h
index e6465cd..c3c5eb2 100644
--- a/target-m68k/helpers.h
+++ b/target-m68k/helpers.h
@@ -81,6 +81,7 @@ DEF_HELPER_1(add_FP0_FP1, void, env)
 DEF_HELPER_1(sub_FP0_FP1, void, env)
 DEF_HELPER_1(mul_FP0_FP1, void, env)
 DEF_HELPER_1(div_FP0_FP1, void, env)
+DEF_HELPER_1(mod_FP0_FP1, void, env)
 DEF_HELPER_1(fcmp_FP0_FP1, void, env)
 DEF_HELPER_1(compare_FP0, i32, env)
 
diff --git a/target-m68k/translate.c b/target-m68k/translate.c
index 91355ba..7d0b790 100644
--- a/target-m68k/translate.c
+++ b/target-m68k/translate.c
@@ -3697,6 +3697,10 @@ DISAS_INSN(fpu)
         gen_op_load_fpr_FP1(REG(ext, 7));
         gen_helper_div_FP0_FP1(cpu_env);
         break;
+    case 0x21:                       /* fmod */
+        gen_op_load_fpr_FP1(REG(ext, 7));
+        gen_helper_mod_FP0_FP1(cpu_env);
+        break;
     case 0x22: case 0x62: case 0x66: /* fadd */
         gen_op_load_fpr_FP1(REG(ext, 7));
         gen_helper_add_FP0_FP1(cpu_env);
-- 
1.7.2.3