diff options
| author | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-04-16 01:35:29 +0000 |
|---|---|---|
| committer | ths <ths@c046a42c-6fe2-441c-8c8c-71466251a162> | 2007-04-16 01:35:29 +0000 |
| commit | 9898128f55e46b695a3d39ac091356c1c296e9b4 (patch) | |
| tree | 10560b114c26848b3082ccd16963492a283a60da /target-mips | |
| parent | e9a9a0811f0d445cca8c05a7257616ed1298424e (diff) | |
Simplify branch likely handling.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2676 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'target-mips')
| -rw-r--r-- | target-mips/translate.c | 14 |
1 files changed, 8 insertions, 6 deletions
diff --git a/target-mips/translate.c b/target-mips/translate.c index 00ca4e21c0..35c98aba77 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -1455,12 +1455,11 @@ static inline void gen_goto_tb(DisasContext *ctx, int n, target_ulong dest) gen_op_goto_tb1(TBPARAM(tb)); gen_op_save_pc(dest); gen_op_set_T0((long)tb + n); - gen_op_exit_tb(); } else { gen_op_save_pc(dest); - gen_op_set_T0(0); - gen_op_exit_tb(); + gen_op_reset_T0(); } + gen_op_exit_tb(); } /* Branches (before delay slot) */ @@ -1565,18 +1564,21 @@ static void gen_compute_branch (DisasContext *ctx, uint32_t opc, case OPC_BLTZAL: /* 0 < 0 */ gen_op_set_T0(ctx->pc + 8); gen_op_store_T0_gpr(31); + MIPS_DEBUG("bnever and link"); return; case OPC_BLTZALL: /* 0 < 0 likely */ gen_op_set_T0(ctx->pc + 8); gen_op_store_T0_gpr(31); - gen_goto_tb(ctx, 0, ctx->pc + 8); + /* Skip the instruction in the delay slot */ + MIPS_DEBUG("bnever, link and skip"); + ctx->pc += 4; return; case OPC_BNEL: /* rx != rx likely */ case OPC_BGTZL: /* 0 > 0 likely */ case OPC_BLTZL: /* 0 < 0 likely */ /* Skip the instruction in the delay slot */ MIPS_DEBUG("bnever and skip"); - gen_goto_tb(ctx, 0, ctx->pc + 8); + ctx->pc += 4; return; case OPC_J: ctx->hflags |= MIPS_HFLAG_B; @@ -5275,7 +5277,7 @@ done_generating: #endif if (loglevel & CPU_LOG_TB_IN_ASM) { fprintf(logfile, "IN: %s\n", lookup_symbol(pc_start)); - target_disas(logfile, pc_start, ctx.pc - pc_start, 0); + target_disas(logfile, pc_start, ctx.pc - pc_start, 0); fprintf(logfile, "\n"); } if (loglevel & CPU_LOG_TB_OP) { |