static void gen_ld(DisasContext *ctx, uint32_t opc, int rt, int base, int16_t offset) { TCGv t0, t1, t2; int mem_idx = ctx->mem_idx; if (rt == 0 && ctx->insn_flags & (INSN_LOONGSON2E | INSN_LOONGSON2F)) { /* Loongson CPU uses a load to zero register for prefetch. We emulate it as a NOP. On other CPU we must perform the actual memory access. */ return; } t0 = tcg_temp_new(); gen_base_offset_addr(ctx, t0, base, offset); switch (opc) { #if defined(TARGET_MIPS64) case OPC_LWU: tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEUL | ctx->default_tcg_memop_mask); gen_store_gpr(t0, rt); break; case OPC_LD: tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEQ | ctx->default_tcg_memop_mask); gen_store_gpr(t0, rt); break; case OPC_LLD: case R6_OPC_LLD: op_ld_lld(t0, t0, mem_idx, ctx); gen_store_gpr(t0, rt); break; case OPC_LDL: t1 = tcg_temp_new(); /* Do a byte access to possibly trigger a page fault with the unaligned address. */ tcg_gen_qemu_ld_tl(t1, t0, mem_idx, MO_UB); tcg_gen_andi_tl(t1, t0, 7); #ifndef TARGET_WORDS_BIGENDIAN tcg_gen_xori_tl(t1, t1, 7); #endif tcg_gen_shli_tl(t1, t1, 3); tcg_gen_andi_tl(t0, t0, ~7); tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEQ); tcg_gen_shl_tl(t0, t0, t1); t2 = tcg_const_tl(-1); tcg_gen_shl_tl(t2, t2, t1); gen_load_gpr(t1, rt); tcg_gen_andc_tl(t1, t1, t2); tcg_temp_free(t2); tcg_gen_or_tl(t0, t0, t1); tcg_temp_free(t1); gen_store_gpr(t0, rt); break; case OPC_LDR: t1 = tcg_temp_new(); /* Do a byte access to possibly trigger a page fault with the unaligned address. */ tcg_gen_qemu_ld_tl(t1, t0, mem_idx, MO_UB); tcg_gen_andi_tl(t1, t0, 7); #ifdef TARGET_WORDS_BIGENDIAN tcg_gen_xori_tl(t1, t1, 7); #endif tcg_gen_shli_tl(t1, t1, 3); tcg_gen_andi_tl(t0, t0, ~7); tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEQ); tcg_gen_shr_tl(t0, t0, t1); tcg_gen_xori_tl(t1, t1, 63); t2 = tcg_const_tl(0xfffffffffffffffeull); tcg_gen_shl_tl(t2, t2, t1); gen_load_gpr(t1, rt); tcg_gen_and_tl(t1, t1, t2); tcg_temp_free(t2); tcg_gen_or_tl(t0, t0, t1); tcg_temp_free(t1); gen_store_gpr(t0, rt); break; case OPC_LDPC: t1 = tcg_const_tl(pc_relative_pc(ctx)); gen_op_addr_add(ctx, t0, t0, t1); tcg_temp_free(t1); tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEQ); gen_store_gpr(t0, rt); break; #endif case OPC_LWPC: t1 = tcg_const_tl(pc_relative_pc(ctx)); gen_op_addr_add(ctx, t0, t0, t1); tcg_temp_free(t1); tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TESL); gen_store_gpr(t0, rt); break; case OPC_LWE: case OPC_LW: tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TESL | ctx->default_tcg_memop_mask); gen_store_gpr(t0, rt); break; case OPC_LHE: case OPC_LH: tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TESW | ctx->default_tcg_memop_mask); gen_store_gpr(t0, rt); break; case OPC_LHUE: case OPC_LHU: tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEUW | ctx->default_tcg_memop_mask); gen_store_gpr(t0, rt); break; case OPC_LBE: case OPC_LB: tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_SB); gen_store_gpr(t0, rt); break; case OPC_LBUE: case OPC_LBU: tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_UB); gen_store_gpr(t0, rt); break; case OPC_LWLE: case OPC_LWL: t1 = tcg_temp_new(); /* Do a byte access to possibly trigger a page fault with the unaligned address. */ tcg_gen_qemu_ld_tl(t1, t0, mem_idx, MO_UB); tcg_gen_andi_tl(t1, t0, 3); #ifndef TARGET_WORDS_BIGENDIAN tcg_gen_xori_tl(t1, t1, 3); #endif tcg_gen_shli_tl(t1, t1, 3); tcg_gen_andi_tl(t0, t0, ~3); tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEUL); tcg_gen_shl_tl(t0, t0, t1); t2 = tcg_const_tl(-1); tcg_gen_shl_tl(t2, t2, t1); gen_load_gpr(t1, rt); tcg_gen_andc_tl(t1, t1, t2); tcg_temp_free(t2); tcg_gen_or_tl(t0, t0, t1); tcg_temp_free(t1); tcg_gen_ext32s_tl(t0, t0); gen_store_gpr(t0, rt); break; case OPC_LWR: t1 = tcg_temp_new(); /* Do a byte access to possibly trigger a page fault with the unaligned address. */ tcg_gen_qemu_ld_tl(t1, t0, mem_idx, MO_UB); tcg_gen_andi_tl(t1, t0, 3); #ifdef TARGET_WORDS_BIGENDIAN tcg_gen_xori_tl(t1, t1, 3); #endif tcg_gen_shli_tl(t1, t1, 3); tcg_gen_andi_tl(t0, t0, ~3); tcg_gen_qemu_ld_tl(t0, t0, mem_idx, MO_TEUL); tcg_gen_shr_tl(t0, t0, t1); tcg_gen_xori_tl(t1, t1, 31); t2 = tcg_const_tl(0xfffffffeull); tcg_gen_shl_tl(t2, t2, t1); gen_load_gpr(t1, rt); tcg_gen_and_tl(t1, t1, t2); tcg_temp_free(t2); tcg_gen_or_tl(t0, t0, t1); tcg_temp_free(t1); tcg_gen_ext32s_tl(t0, t0); gen_store_gpr(t0, rt); break; case OPC_LLE: case OPC_LL: case R6_OPC_LL: op_ld_ll(t0, t0, mem_idx, ctx); gen_store_gpr(t0, rt); break; } tcg_temp_free(t0); }