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| author | Richard Henderson <rth@twiddle.net> | 2015-08-31 13:24:44 -0700 |
|---|---|---|
| committer | Richard Henderson <rth@twiddle.net> | 2015-10-07 20:36:49 +1100 |
| commit | 6c42444f9a53b6af39d46008cb9f650b11e96cb9 (patch) | |
| tree | 268c4a98bab76326a43dbafa7803bdbb381d98bd /target-sparc | |
| parent | 2bf2e019ed0a6349220620240c0ba807846793b9 (diff) | |
| download | qemu-6c42444f9a53b6af39d46008cb9f650b11e96cb9.tar.gz qemu-6c42444f9a53b6af39d46008cb9f650b11e96cb9.tar.bz2 qemu-6c42444f9a53b6af39d46008cb9f650b11e96cb9.zip | |
target-sparc: Remove gen_opc_jump_pc
Since jump_pc[1] is always npc + 4, we can infer after incrementing
that jump_pc[1] == pc + 4. Because of that, we can encode the branch
destination into a single word, and store that in npc.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'target-sparc')
| -rw-r--r-- | target-sparc/translate.c | 19 |
1 files changed, 10 insertions, 9 deletions
diff --git a/target-sparc/translate.c b/target-sparc/translate.c index c6a8d86400..25b5bc04a9 100644 --- a/target-sparc/translate.c +++ b/target-sparc/translate.c @@ -65,7 +65,6 @@ static TCGv cpu_wim; static TCGv_i64 cpu_fpr[TARGET_DPREGS]; static target_ulong gen_opc_npc[OPC_BUF_SIZE]; -static target_ulong gen_opc_jump_pc[2]; #include "exec/gen-icount.h" @@ -5250,6 +5249,10 @@ static inline void gen_intermediate_code_internal(SPARCCPU *cpu, tcg_ctx.gen_opc_instr_start[lj++] = 0; tcg_ctx.gen_opc_pc[lj] = dc->pc; gen_opc_npc[lj] = dc->npc; + if (dc->npc & JUMP_PC) { + assert(dc->jump_pc[1] == dc->pc + 4); + gen_opc_npc[lj] = dc->jump_pc[0] | JUMP_PC; + } tcg_ctx.gen_opc_instr_start[lj] = 1; tcg_ctx.gen_opc_icount[lj] = num_insns; } @@ -5321,8 +5324,6 @@ static inline void gen_intermediate_code_internal(SPARCCPU *cpu, #if 0 log_page_dump(); #endif - gen_opc_jump_pc[0] = dc->jump_pc[0]; - gen_opc_jump_pc[1] = dc->jump_pc[1]; } else { tb->size = last_pc + 4 - pc_start; tb->icount = num_insns; @@ -5450,17 +5451,17 @@ void gen_intermediate_code_init(CPUSPARCState *env) void restore_state_to_opc(CPUSPARCState *env, TranslationBlock *tb, int pc_pos) { - target_ulong npc; - env->pc = tcg_ctx.gen_opc_pc[pc_pos]; + target_ulong pc, npc; + env->pc = pc = tcg_ctx.gen_opc_pc[pc_pos]; npc = gen_opc_npc[pc_pos]; - if (npc == 1) { + if (npc == DYNAMIC_PC) { /* dynamic NPC: already stored */ - } else if (npc == 2) { + } else if (npc & JUMP_PC) { /* jump PC: use 'cond' and the jump targets of the translation */ if (env->cond) { - env->npc = gen_opc_jump_pc[0]; + env->npc = npc & ~3; } else { - env->npc = gen_opc_jump_pc[1]; + env->npc = pc + 4; } } else { env->npc = npc; |