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use direct jump only for jumps in the same page

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1629 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2005-11-20 10:32:05 +00:00
parent c1942362bc
commit 6e256c935c
4 changed files with 110 additions and 72 deletions
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56
target-sparc/translate.c
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@ -561,6 +561,32 @@ static inline void gen_movl_npc_im(target_ulong npc)
#endif
}
static inline void gen_goto_tb(DisasContext *s, int tb_num,
target_ulong pc, target_ulong npc)
{
TranslationBlock *tb;
tb = s->tb;
if ((pc & TARGET_PAGE_MASK) == (tb->pc & TARGET_PAGE_MASK) &&
(npc & TARGET_PAGE_MASK) == (tb->pc & TARGET_PAGE_MASK)) {
/* jump to same page: we can use a direct jump */
if (tb_num == 0)
gen_op_goto_tb0(TBPARAM(tb));
else
gen_op_goto_tb1(TBPARAM(tb));
gen_jmp_im(pc);
gen_movl_npc_im(npc);
gen_op_movl_T0_im((long)tb + tb_num);
gen_op_exit_tb();
} else {
/* jump to another page: currently not optimized */
gen_jmp_im(pc);
gen_movl_npc_im(npc);
gen_op_movl_T0_0();
gen_op_exit_tb();
}
}
static inline void gen_branch2(DisasContext *dc, long tb, target_ulong pc1, target_ulong pc2)
{
int l1;
@ -569,18 +595,10 @@ static inline void gen_branch2(DisasContext *dc, long tb, target_ulong pc1, targ
gen_op_jz_T2_label(l1);
gen_op_goto_tb0(TBPARAM(tb));
gen_jmp_im(pc1);
gen_movl_npc_im(pc1 + 4);
gen_op_movl_T0_im((long)tb + 0);
gen_op_exit_tb();
gen_goto_tb(dc, 0, pc1, pc1 + 4);
gen_set_label(l1);
gen_op_goto_tb1(TBPARAM(tb));
gen_jmp_im(pc2);
gen_movl_npc_im(pc2 + 4);
gen_op_movl_T0_im((long)tb + 1);
gen_op_exit_tb();
gen_goto_tb(dc, 1, pc2, pc2 + 4);
}
static inline void gen_branch_a(DisasContext *dc, long tb, target_ulong pc1, target_ulong pc2)
@ -591,27 +609,15 @@ static inline void gen_branch_a(DisasContext *dc, long tb, target_ulong pc1, tar
gen_op_jz_T2_label(l1);
gen_op_goto_tb0(TBPARAM(tb));
gen_jmp_im(pc2);
gen_movl_npc_im(pc1);
gen_op_movl_T0_im((long)tb + 0);
gen_op_exit_tb();
gen_goto_tb(dc, 0, pc2, pc1);
gen_set_label(l1);
gen_op_goto_tb1(TBPARAM(tb));
gen_jmp_im(pc2 + 4);
gen_movl_npc_im(pc2 + 8);
gen_op_movl_T0_im((long)tb + 1);
gen_op_exit_tb();
gen_goto_tb(dc, 1, pc2 + 4, pc2 + 8);
}
static inline void gen_branch(DisasContext *dc, long tb, target_ulong pc, target_ulong npc)
{
gen_op_goto_tb0(TBPARAM(tb));
gen_jmp_im(pc);
gen_movl_npc_im(npc);
gen_op_movl_T0_im((long)tb + 0);
gen_op_exit_tb();
gen_goto_tb(dc, 0, pc, npc);
}
static inline void gen_generic_branch(DisasContext *dc, target_ulong npc1, target_ulong npc2)