From 0dc4af5c1a0e8d3f73b176f8fd3159e77a4c2492 Mon Sep 17 00:00:00 2001 From: "Edgar E. Iglesias" Date: Fri, 13 Apr 2018 16:12:56 +0200 Subject: [PATCH] target-microblaze: Make compute_ldst_addr always use a temp MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Make compute_ldst_addr always use a temp. This simplifies the code a bit in preparation for adding support for 64bit addresses. No functional change. Reviewed-by: Richard Henderson Reviewed-by: Philippe Mathieu-Daudé Signed-off-by: Edgar E. Iglesias --- target/microblaze/translate.c | 111 ++++++++++++---------------------- 1 file changed, 37 insertions(+), 74 deletions(-) diff --git a/target/microblaze/translate.c b/target/microblaze/translate.c index 2e9a286af6..2a4546ec3d 100644 --- a/target/microblaze/translate.c +++ b/target/microblaze/translate.c @@ -848,7 +848,7 @@ static void dec_imm(DisasContext *dc) dc->clear_imm = 0; } -static inline TCGv_i32 *compute_ldst_addr(DisasContext *dc, TCGv_i32 *t) +static inline void compute_ldst_addr(DisasContext *dc, TCGv_i32 *t) { bool extimm = dc->tb_flags & IMM_FLAG; /* Should be set to true if r1 is used by loadstores. */ @@ -861,47 +861,47 @@ static inline TCGv_i32 *compute_ldst_addr(DisasContext *dc, TCGv_i32 *t) /* Treat the common cases first. */ if (!dc->type_b) { - /* If any of the regs is r0, return a ptr to the other. */ + /* If any of the regs is r0, set t to the value of the other reg. */ if (dc->ra == 0) { - return &cpu_R[dc->rb]; + tcg_gen_mov_i32(*t, cpu_R[dc->rb]); + return; } else if (dc->rb == 0) { - return &cpu_R[dc->ra]; + tcg_gen_mov_i32(*t, cpu_R[dc->ra]); + return; } if (dc->rb == 1 && dc->cpu->cfg.stackprot) { stackprot = true; } - *t = tcg_temp_new_i32(); tcg_gen_add_i32(*t, cpu_R[dc->ra], cpu_R[dc->rb]); if (stackprot) { gen_helper_stackprot(cpu_env, *t); } - return t; + return; } /* Immediate. */ if (!extimm) { if (dc->imm == 0) { - return &cpu_R[dc->ra]; + tcg_gen_mov_i32(*t, cpu_R[dc->ra]); + return; } - *t = tcg_temp_new_i32(); tcg_gen_movi_i32(*t, (int32_t)((int16_t)dc->imm)); tcg_gen_add_i32(*t, cpu_R[dc->ra], *t); } else { - *t = tcg_temp_new_i32(); tcg_gen_add_i32(*t, cpu_R[dc->ra], *(dec_alu_op_b(dc))); } if (stackprot) { gen_helper_stackprot(cpu_env, *t); } - return t; + return; } static void dec_load(DisasContext *dc) { - TCGv_i32 t, v, *addr; + TCGv_i32 v, addr; unsigned int size; bool rev = false, ex = false; TCGMemOp mop; @@ -928,7 +928,8 @@ static void dec_load(DisasContext *dc) ex ? "x" : ""); t_sync_flags(dc); - addr = compute_ldst_addr(dc, &t); + addr = tcg_temp_new_i32(); + compute_ldst_addr(dc, &addr); /* * When doing reverse accesses we need to do two things. @@ -947,17 +948,10 @@ static void dec_load(DisasContext *dc) 11 -> 00 */ TCGv_i32 low = tcg_temp_new_i32(); - /* Force addr into the temp. */ - if (addr != &t) { - t = tcg_temp_new_i32(); - tcg_gen_mov_i32(t, *addr); - addr = &t; - } - - tcg_gen_andi_i32(low, t, 3); + tcg_gen_andi_i32(low, addr, 3); tcg_gen_sub_i32(low, tcg_const_i32(3), low); - tcg_gen_andi_i32(t, t, ~3); - tcg_gen_or_i32(t, t, low); + tcg_gen_andi_i32(addr, addr, ~3); + tcg_gen_or_i32(addr, addr, low); tcg_temp_free_i32(low); break; } @@ -965,14 +959,7 @@ static void dec_load(DisasContext *dc) case 2: /* 00 -> 10 10 -> 00. */ - /* Force addr into the temp. */ - if (addr != &t) { - t = tcg_temp_new_i32(); - tcg_gen_xori_i32(t, *addr, 2); - addr = &t; - } else { - tcg_gen_xori_i32(t, t, 2); - } + tcg_gen_xori_i32(addr, addr, 2); break; default: cpu_abort(CPU(dc->cpu), "Invalid reverse size\n"); @@ -982,13 +969,7 @@ static void dec_load(DisasContext *dc) /* lwx does not throw unaligned access errors, so force alignment */ if (ex) { - /* Force addr into the temp. */ - if (addr != &t) { - t = tcg_temp_new_i32(); - tcg_gen_mov_i32(t, *addr); - addr = &t; - } - tcg_gen_andi_i32(t, t, ~3); + tcg_gen_andi_i32(addr, addr, ~3); } /* If we get a fault on a dslot, the jmpstate better be in sync. */ @@ -1002,16 +983,16 @@ static void dec_load(DisasContext *dc) * address and if that succeeds we write into the destination reg. */ v = tcg_temp_new_i32(); - tcg_gen_qemu_ld_i32(v, *addr, cpu_mmu_index(&dc->cpu->env, false), mop); + tcg_gen_qemu_ld_i32(v, addr, cpu_mmu_index(&dc->cpu->env, false), mop); if ((dc->cpu->env.pvr.regs[2] & PVR2_UNALIGNED_EXC_MASK) && size > 1) { tcg_gen_movi_i32(cpu_SR[SR_PC], dc->pc); - gen_helper_memalign(cpu_env, *addr, tcg_const_i32(dc->rd), + gen_helper_memalign(cpu_env, addr, tcg_const_i32(dc->rd), tcg_const_i32(0), tcg_const_i32(size - 1)); } if (ex) { - tcg_gen_mov_i32(env_res_addr, *addr); + tcg_gen_mov_i32(env_res_addr, addr); tcg_gen_mov_i32(env_res_val, v); } if (dc->rd) { @@ -1024,13 +1005,12 @@ static void dec_load(DisasContext *dc) write_carryi(dc, 0); } - if (addr == &t) - tcg_temp_free_i32(t); + tcg_temp_free_i32(addr); } static void dec_store(DisasContext *dc) { - TCGv_i32 t, *addr, swx_addr; + TCGv_i32 addr; TCGLabel *swx_skip = NULL; unsigned int size; bool rev = false, ex = false; @@ -1059,21 +1039,19 @@ static void dec_store(DisasContext *dc) t_sync_flags(dc); /* If we get a fault on a dslot, the jmpstate better be in sync. */ sync_jmpstate(dc); - addr = compute_ldst_addr(dc, &t); + /* SWX needs a temp_local. */ + addr = ex ? tcg_temp_local_new_i32() : tcg_temp_new_i32(); + compute_ldst_addr(dc, &addr); - swx_addr = tcg_temp_local_new_i32(); if (ex) { /* swx */ TCGv_i32 tval; - /* Force addr into the swx_addr. */ - tcg_gen_mov_i32(swx_addr, *addr); - addr = &swx_addr; /* swx does not throw unaligned access errors, so force alignment */ - tcg_gen_andi_i32(swx_addr, swx_addr, ~3); + tcg_gen_andi_i32(addr, addr, ~3); write_carryi(dc, 1); swx_skip = gen_new_label(); - tcg_gen_brcond_i32(TCG_COND_NE, env_res_addr, swx_addr, swx_skip); + tcg_gen_brcond_i32(TCG_COND_NE, env_res_addr, addr, swx_skip); /* Compare the value loaded at lwx with current contents of the reserved location. @@ -1081,8 +1059,8 @@ static void dec_store(DisasContext *dc) this compare and the following write to be atomic. For user emulation we need to add atomicity between threads. */ tval = tcg_temp_new_i32(); - tcg_gen_qemu_ld_i32(tval, swx_addr, cpu_mmu_index(&dc->cpu->env, false), - MO_TEUL); + tcg_gen_qemu_ld_i32(tval, addr, cpu_mmu_index(&dc->cpu->env, false), + MO_TEUL); tcg_gen_brcond_i32(TCG_COND_NE, env_res_val, tval, swx_skip); write_carryi(dc, 0); tcg_temp_free_i32(tval); @@ -1099,17 +1077,10 @@ static void dec_store(DisasContext *dc) 11 -> 00 */ TCGv_i32 low = tcg_temp_new_i32(); - /* Force addr into the temp. */ - if (addr != &t) { - t = tcg_temp_new_i32(); - tcg_gen_mov_i32(t, *addr); - addr = &t; - } - - tcg_gen_andi_i32(low, t, 3); + tcg_gen_andi_i32(low, addr, 3); tcg_gen_sub_i32(low, tcg_const_i32(3), low); - tcg_gen_andi_i32(t, t, ~3); - tcg_gen_or_i32(t, t, low); + tcg_gen_andi_i32(addr, addr, ~3); + tcg_gen_or_i32(addr, addr, low); tcg_temp_free_i32(low); break; } @@ -1118,20 +1089,14 @@ static void dec_store(DisasContext *dc) /* 00 -> 10 10 -> 00. */ /* Force addr into the temp. */ - if (addr != &t) { - t = tcg_temp_new_i32(); - tcg_gen_xori_i32(t, *addr, 2); - addr = &t; - } else { - tcg_gen_xori_i32(t, t, 2); - } + tcg_gen_xori_i32(addr, addr, 2); break; default: cpu_abort(CPU(dc->cpu), "Invalid reverse size\n"); break; } } - tcg_gen_qemu_st_i32(cpu_R[dc->rd], *addr, + tcg_gen_qemu_st_i32(cpu_R[dc->rd], addr, cpu_mmu_index(&dc->cpu->env, false), mop); /* Verify alignment if needed. */ @@ -1143,17 +1108,15 @@ static void dec_store(DisasContext *dc) * the alignment checks in between the probe and the mem * access. */ - gen_helper_memalign(cpu_env, *addr, tcg_const_i32(dc->rd), + gen_helper_memalign(cpu_env, addr, tcg_const_i32(dc->rd), tcg_const_i32(1), tcg_const_i32(size - 1)); } if (ex) { gen_set_label(swx_skip); } - tcg_temp_free_i32(swx_addr); - if (addr == &t) - tcg_temp_free_i32(t); + tcg_temp_free_i32(addr); } static inline void eval_cc(DisasContext *dc, unsigned int cc,