Use temporaries instead of fixed registers for some instructions.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4784 c046a42c-6fe2-441c-8c8c-71466251a162

target-mips/helper.h

@@ -152,11 +152,11 @@ DEF_HELPER(target_ulong, do_dmt, (target_ulong t0))
 DEF_HELPER(target_ulong, do_emt, (target_ulong t0))
 DEF_HELPER(target_ulong, do_dvpe, (target_ulong t0))
 DEF_HELPER(target_ulong, do_evpe, (target_ulong t0))
-DEF_HELPER(target_ulong, do_fork, (target_ulong t0, target_ulong t1))
+DEF_HELPER(void, do_fork, (target_ulong t0, target_ulong t1))
 DEF_HELPER(target_ulong, do_yield, (target_ulong t0))
 
 /* CP1 functions */
-DEF_HELPER(target_ulong, do_cfc1, (target_ulong t0, uint32_t reg))
+DEF_HELPER(target_ulong, do_cfc1, (uint32_t reg))
 DEF_HELPER(void, do_ctc1, (target_ulong t0, uint32_t reg))
 
 DEF_HELPER(void, do_float_cvtd_s, (void))
@@ -241,8 +241,8 @@ FOP_PROTO(ngt)
 /* Special functions */
 DEF_HELPER(target_ulong, do_di, (target_ulong t0))
 DEF_HELPER(target_ulong, do_ei, (target_ulong t0))
-DEF_HELPER(void, do_eret, (target_ulong t0))
-DEF_HELPER(void, do_deret, (target_ulong t0))
+DEF_HELPER(void, do_eret, (void))
+DEF_HELPER(void, do_deret, (void))
 DEF_HELPER(target_ulong, do_rdhwr_cpunum, (target_ulong t0))
 DEF_HELPER(target_ulong, do_rdhwr_synci_step, (target_ulong t0))
 DEF_HELPER(target_ulong, do_rdhwr_cc, (target_ulong t0))

target-mips/op_helper.c

@@ -1438,13 +1438,11 @@ target_ulong do_evpe(target_ulong t0)
     return t0;
 }
 
-target_ulong do_fork(target_ulong t0, target_ulong t1)
+void do_fork(target_ulong t0, target_ulong t1)
 {
     // t0 = rt, t1 = rs
     t0 = 0;
     // TODO: store to TC register
-
-    return t0;
 }
 
 target_ulong do_yield(target_ulong t0)
@@ -1684,7 +1682,7 @@ void debug_post_eret (void)
     }
 }
 
-void do_eret (target_ulong t0)
+void do_eret (void)
 {
     if (loglevel & CPU_LOG_EXEC)
         debug_pre_eret();
@@ -1701,7 +1699,7 @@ void do_eret (target_ulong t0)
     env->CP0_LLAddr = 1;
 }
 
-void do_deret (target_ulong t0)
+void do_deret (void)
 {
     if (loglevel & CPU_LOG_EXEC)
         debug_pre_eret();
@@ -1918,8 +1916,10 @@ unsigned int ieee_rm[] = {
 #define RESTORE_ROUNDING_MODE \
     set_float_rounding_mode(ieee_rm[env->fpu->fcr31 & 3], &env->fpu->fp_status)
 
-target_ulong do_cfc1 (target_ulong t0, uint32_t reg)
+target_ulong do_cfc1 (uint32_t reg)
 {
+    target_ulong t0;
+
     switch (reg) {
     case 0:
         t0 = (int32_t)env->fpu->fcr0;