target/i386: Split out do_fninit

Do not call helper_fninit directly from helper_xrstor.
Do call the new helper from do_fsave.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

diff --git a/target/i386/tcg/fpu_helper.c b/target/i386/tcg/fpu_helper.c
index 74bbe94b8024633a937f825d3e3140ff71bf9e5d..beb63be4320dc306746e07c0938d13ef16a3cd99 100644 (file)
--- a/target/i386/tcg/fpu_helper.c
+++ b/target/i386/tcg/fpu_helper.c
@@ -727,7 +727,7 @@ void helper_fwait(CPUX86State *env)
     }
 }
 
-void helper_fninit(CPUX86State *env)
+static void do_fninit(CPUX86State *env)
 {
     env->fpus = 0;
     env->fpstt = 0;
@@ -742,6 +742,11 @@ void helper_fninit(CPUX86State *env)
     env->fptags[7] = 1;
 }
 
+void helper_fninit(CPUX86State *env)
+{
+    do_fninit(env);
+}
+
 /* BCD ops */
 
 void helper_fbld_ST0(CPUX86State *env, target_ulong ptr)
@@ -2451,18 +2456,7 @@ static void do_fsave(CPUX86State *env, target_ulong ptr, int data32,
         ptr += 10;
     }
 
-    /* fninit */
-    env->fpus = 0;
-    env->fpstt = 0;
-    cpu_set_fpuc(env, 0x37f);
-    env->fptags[0] = 1;
-    env->fptags[1] = 1;
-    env->fptags[2] = 1;
-    env->fptags[3] = 1;
-    env->fptags[4] = 1;
-    env->fptags[5] = 1;
-    env->fptags[6] = 1;
-    env->fptags[7] = 1;
+    do_fninit(env);
 }
 
 void helper_fsave(CPUX86State *env, target_ulong ptr, int data32)
@@ -2834,7 +2828,7 @@ void helper_xrstor(CPUX86State *env, target_ulong ptr, uint64_t rfbm)
         if (xstate_bv & XSTATE_FP_MASK) {
             do_xrstor_fpu(env, ptr, ra);
         } else {
-            helper_fninit(env);
+            do_fninit(env);
             memset(env->fpregs, 0, sizeof(env->fpregs));
         }
     }