CRIS: Eliminate a few unneeded moves to/from T0/T1.

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4306 c046a42c-6fe2-441c-8c8c-71466251a162

diff --git a/target-cris/translate.c b/target-cris/translate.c
index 7fdedbf..72e5e3c 100644 (file)
--- a/target-cris/translate.c
+++ b/target-cris/translate.c
@@ -449,11 +449,10 @@ static void gen_goto_tb(DisasContext *dc, int n, target_ulong dest)
        tb = dc->tb;
        if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK)) {
                tcg_gen_goto_tb(n);
-               tcg_gen_movi_tl(cpu_T[0], dest);
-               t_gen_mov_env_TN(pc, cpu_T[0]);
+               tcg_gen_movi_tl(env_pc, dest);
                tcg_gen_exit_tb((long)tb + n);
        } else {
-               t_gen_mov_env_TN(pc, cpu_T[0]);
+               tcg_gen_mov_tl(env_pc, cpu_T[0]);
                tcg_gen_exit_tb(0);
        }
 }
@@ -916,6 +915,8 @@ static inline void t_gen_sext(TCGv d, TCGv s, int size)
                tcg_gen_ext8s_i32(d, s);
        else if (size == 2)
                tcg_gen_ext16s_i32(d, s);
+       else
+               tcg_gen_mov_tl(d, s);
 }
 
 static inline void t_gen_zext(TCGv d, TCGv s, int size)
@@ -925,6 +926,8 @@ static inline void t_gen_zext(TCGv d, TCGv s, int size)
                tcg_gen_andi_i32(d, s, 0xff);
        else if (size == 2)
                tcg_gen_andi_i32(d, s, 0xffff);
+       else
+               tcg_gen_mov_tl(d, s);
 }
 
 #if DISAS_CRIS
@@ -968,11 +971,10 @@ static inline void do_postinc (DisasContext *dc, int size)
 static void dec_prep_move_r(DisasContext *dc, int rs, int rd,
                            int size, int s_ext)
 {
-       t_gen_mov_TN_reg(cpu_T[1], rs);
        if (s_ext)
-               t_gen_sext(cpu_T[1], cpu_T[1], size);
+               t_gen_sext(cpu_T[1], cpu_R[rs], size);
        else
-               t_gen_zext(cpu_T[1], cpu_T[1], size);
+               t_gen_zext(cpu_T[1], cpu_R[rs], size);
 }
 
 /* Prepare T0 and T1 for a register alu operation.
@@ -983,11 +985,10 @@ static void dec_prep_alu_r(DisasContext *dc, int rs, int rd,
 {
        dec_prep_move_r(dc, rs, rd, size, s_ext);
 
-       t_gen_mov_TN_reg(cpu_T[0], rd);
        if (s_ext)
-               t_gen_sext(cpu_T[0], cpu_T[0], size);
+               t_gen_sext(cpu_T[0], cpu_R[rd], size);
        else
-               t_gen_zext(cpu_T[0], cpu_T[0], size);
+               t_gen_zext(cpu_T[0], cpu_R[rd], size);
 }
 
 /* Prepare T0 and T1 for a memory + alu operation.