| /* |
| * Tiny Code Generator for QEMU |
| * |
| * Copyright (c) 2008 Fabrice Bellard |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in |
| * all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| * THE SOFTWARE. |
| */ |
| |
| #include "qemu/osdep.h" |
| #include "tcg/tcg.h" |
| #include "tcg/tcg-temp-internal.h" |
| #include "tcg/tcg-op-common.h" |
| #include "tcg/tcg-mo.h" |
| #include "exec/translation-block.h" |
| #include "exec/plugin-gen.h" |
| #include "tcg-internal.h" |
| |
| |
| static void check_max_alignment(unsigned a_bits) |
| { |
| /* |
| * The requested alignment cannot overlap the TLB flags. |
| * FIXME: Must keep the count up-to-date with "exec/cpu-all.h". |
| */ |
| if (tcg_use_softmmu) { |
| tcg_debug_assert(a_bits + 5 <= tcg_ctx->page_bits); |
| } |
| } |
| |
| static MemOp tcg_canonicalize_memop(MemOp op, bool is64, bool st) |
| { |
| unsigned a_bits = get_alignment_bits(op); |
| |
| check_max_alignment(a_bits); |
| |
| /* Prefer MO_ALIGN+MO_XX over MO_ALIGN_XX+MO_XX */ |
| if (a_bits == (op & MO_SIZE)) { |
| op = (op & ~MO_AMASK) | MO_ALIGN; |
| } |
| |
| switch (op & MO_SIZE) { |
| case MO_8: |
| op &= ~MO_BSWAP; |
| break; |
| case MO_16: |
| break; |
| case MO_32: |
| if (!is64) { |
| op &= ~MO_SIGN; |
| } |
| break; |
| case MO_64: |
| if (is64) { |
| op &= ~MO_SIGN; |
| break; |
| } |
| /* fall through */ |
| default: |
| g_assert_not_reached(); |
| } |
| if (st) { |
| op &= ~MO_SIGN; |
| } |
| |
| /* In serial mode, reduce atomicity. */ |
| if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) { |
| op &= ~MO_ATOM_MASK; |
| op |= MO_ATOM_NONE; |
| } |
| |
| return op; |
| } |
| |
| static void gen_ldst(TCGOpcode opc, TCGTemp *vl, TCGTemp *vh, |
| TCGTemp *addr, MemOpIdx oi) |
| { |
| if (TCG_TARGET_REG_BITS == 64 || tcg_ctx->addr_type == TCG_TYPE_I32) { |
| if (vh) { |
| tcg_gen_op4(opc, temp_arg(vl), temp_arg(vh), temp_arg(addr), oi); |
| } else { |
| tcg_gen_op3(opc, temp_arg(vl), temp_arg(addr), oi); |
| } |
| } else { |
| /* See TCGV_LOW/HIGH. */ |
| TCGTemp *al = addr + HOST_BIG_ENDIAN; |
| TCGTemp *ah = addr + !HOST_BIG_ENDIAN; |
| |
| if (vh) { |
| tcg_gen_op5(opc, temp_arg(vl), temp_arg(vh), |
| temp_arg(al), temp_arg(ah), oi); |
| } else { |
| tcg_gen_op4(opc, temp_arg(vl), temp_arg(al), temp_arg(ah), oi); |
| } |
| } |
| } |
| |
| static void gen_ldst_i64(TCGOpcode opc, TCGv_i64 v, TCGTemp *addr, MemOpIdx oi) |
| { |
| if (TCG_TARGET_REG_BITS == 32) { |
| TCGTemp *vl = tcgv_i32_temp(TCGV_LOW(v)); |
| TCGTemp *vh = tcgv_i32_temp(TCGV_HIGH(v)); |
| gen_ldst(opc, vl, vh, addr, oi); |
| } else { |
| gen_ldst(opc, tcgv_i64_temp(v), NULL, addr, oi); |
| } |
| } |
| |
| static void tcg_gen_req_mo(TCGBar type) |
| { |
| type &= tcg_ctx->guest_mo; |
| type &= ~TCG_TARGET_DEFAULT_MO; |
| if (type) { |
| tcg_gen_mb(type | TCG_BAR_SC); |
| } |
| } |
| |
| /* Only required for loads, where value might overlap addr. */ |
| static TCGv_i64 plugin_maybe_preserve_addr(TCGTemp *addr) |
| { |
| #ifdef CONFIG_PLUGIN |
| if (tcg_ctx->plugin_insn != NULL) { |
| /* Save a copy of the vaddr for use after a load. */ |
| TCGv_i64 temp = tcg_temp_ebb_new_i64(); |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| tcg_gen_extu_i32_i64(temp, temp_tcgv_i32(addr)); |
| } else { |
| tcg_gen_mov_i64(temp, temp_tcgv_i64(addr)); |
| } |
| return temp; |
| } |
| #endif |
| return NULL; |
| } |
| |
| #ifdef CONFIG_PLUGIN |
| static void |
| plugin_gen_mem_callbacks(TCGv_i64 copy_addr, TCGTemp *orig_addr, MemOpIdx oi, |
| enum qemu_plugin_mem_rw rw) |
| { |
| if (tcg_ctx->plugin_insn != NULL) { |
| qemu_plugin_meminfo_t info = make_plugin_meminfo(oi, rw); |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| if (!copy_addr) { |
| copy_addr = tcg_temp_ebb_new_i64(); |
| tcg_gen_extu_i32_i64(copy_addr, temp_tcgv_i32(orig_addr)); |
| } |
| tcg_gen_plugin_mem_cb(copy_addr, info); |
| tcg_temp_free_i64(copy_addr); |
| } else { |
| if (copy_addr) { |
| tcg_gen_plugin_mem_cb(copy_addr, info); |
| tcg_temp_free_i64(copy_addr); |
| } else { |
| tcg_gen_plugin_mem_cb(temp_tcgv_i64(orig_addr), info); |
| } |
| } |
| } |
| } |
| #endif |
| |
| static void |
| plugin_gen_mem_callbacks_i32(TCGv_i32 val, |
| TCGv_i64 copy_addr, TCGTemp *orig_addr, |
| MemOpIdx oi, enum qemu_plugin_mem_rw rw) |
| { |
| #ifdef CONFIG_PLUGIN |
| if (tcg_ctx->plugin_insn != NULL) { |
| tcg_gen_st_i32(val, tcg_env, |
| offsetof(CPUState, neg.plugin_mem_value_low) - |
| sizeof(CPUState) + (HOST_BIG_ENDIAN * 4)); |
| plugin_gen_mem_callbacks(copy_addr, orig_addr, oi, rw); |
| } |
| #endif |
| } |
| |
| static void |
| plugin_gen_mem_callbacks_i64(TCGv_i64 val, |
| TCGv_i64 copy_addr, TCGTemp *orig_addr, |
| MemOpIdx oi, enum qemu_plugin_mem_rw rw) |
| { |
| #ifdef CONFIG_PLUGIN |
| if (tcg_ctx->plugin_insn != NULL) { |
| tcg_gen_st_i64(val, tcg_env, |
| offsetof(CPUState, neg.plugin_mem_value_low) - |
| sizeof(CPUState)); |
| plugin_gen_mem_callbacks(copy_addr, orig_addr, oi, rw); |
| } |
| #endif |
| } |
| |
| static void |
| plugin_gen_mem_callbacks_i128(TCGv_i128 val, |
| TCGv_i64 copy_addr, TCGTemp *orig_addr, |
| MemOpIdx oi, enum qemu_plugin_mem_rw rw) |
| { |
| #ifdef CONFIG_PLUGIN |
| if (tcg_ctx->plugin_insn != NULL) { |
| tcg_gen_st_i64(TCGV128_LOW(val), tcg_env, |
| offsetof(CPUState, neg.plugin_mem_value_low) - |
| sizeof(CPUState)); |
| tcg_gen_st_i64(TCGV128_HIGH(val), tcg_env, |
| offsetof(CPUState, neg.plugin_mem_value_high) - |
| sizeof(CPUState)); |
| plugin_gen_mem_callbacks(copy_addr, orig_addr, oi, rw); |
| } |
| #endif |
| } |
| |
| static void tcg_gen_qemu_ld_i32_int(TCGv_i32 val, TCGTemp *addr, |
| TCGArg idx, MemOp memop) |
| { |
| MemOp orig_memop; |
| MemOpIdx orig_oi, oi; |
| TCGv_i64 copy_addr; |
| TCGOpcode opc; |
| |
| tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD); |
| orig_memop = memop = tcg_canonicalize_memop(memop, 0, 0); |
| orig_oi = oi = make_memop_idx(memop, idx); |
| |
| if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) { |
| memop &= ~MO_BSWAP; |
| /* The bswap primitive benefits from zero-extended input. */ |
| if ((memop & MO_SSIZE) == MO_SW) { |
| memop &= ~MO_SIGN; |
| } |
| oi = make_memop_idx(memop, idx); |
| } |
| |
| copy_addr = plugin_maybe_preserve_addr(addr); |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_ld_a32_i32; |
| } else { |
| opc = INDEX_op_qemu_ld_a64_i32; |
| } |
| gen_ldst(opc, tcgv_i32_temp(val), NULL, addr, oi); |
| plugin_gen_mem_callbacks_i32(val, copy_addr, addr, orig_oi, |
| QEMU_PLUGIN_MEM_R); |
| |
| if ((orig_memop ^ memop) & MO_BSWAP) { |
| switch (orig_memop & MO_SIZE) { |
| case MO_16: |
| tcg_gen_bswap16_i32(val, val, (orig_memop & MO_SIGN |
| ? TCG_BSWAP_IZ | TCG_BSWAP_OS |
| : TCG_BSWAP_IZ | TCG_BSWAP_OZ)); |
| break; |
| case MO_32: |
| tcg_gen_bswap32_i32(val, val); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| } |
| |
| void tcg_gen_qemu_ld_i32_chk(TCGv_i32 val, TCGTemp *addr, TCGArg idx, |
| MemOp memop, TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_32); |
| tcg_gen_qemu_ld_i32_int(val, addr, idx, memop); |
| } |
| |
| static void tcg_gen_qemu_st_i32_int(TCGv_i32 val, TCGTemp *addr, |
| TCGArg idx, MemOp memop) |
| { |
| TCGv_i32 swap = NULL; |
| MemOpIdx orig_oi, oi; |
| TCGOpcode opc; |
| |
| tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST); |
| memop = tcg_canonicalize_memop(memop, 0, 1); |
| orig_oi = oi = make_memop_idx(memop, idx); |
| |
| if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) { |
| swap = tcg_temp_ebb_new_i32(); |
| switch (memop & MO_SIZE) { |
| case MO_16: |
| tcg_gen_bswap16_i32(swap, val, 0); |
| break; |
| case MO_32: |
| tcg_gen_bswap32_i32(swap, val); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| val = swap; |
| memop &= ~MO_BSWAP; |
| oi = make_memop_idx(memop, idx); |
| } |
| |
| if (TCG_TARGET_HAS_qemu_st8_i32 && (memop & MO_SIZE) == MO_8) { |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_st8_a32_i32; |
| } else { |
| opc = INDEX_op_qemu_st8_a64_i32; |
| } |
| } else { |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_st_a32_i32; |
| } else { |
| opc = INDEX_op_qemu_st_a64_i32; |
| } |
| } |
| gen_ldst(opc, tcgv_i32_temp(val), NULL, addr, oi); |
| plugin_gen_mem_callbacks_i32(val, NULL, addr, orig_oi, QEMU_PLUGIN_MEM_W); |
| |
| if (swap) { |
| tcg_temp_free_i32(swap); |
| } |
| } |
| |
| void tcg_gen_qemu_st_i32_chk(TCGv_i32 val, TCGTemp *addr, TCGArg idx, |
| MemOp memop, TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_32); |
| tcg_gen_qemu_st_i32_int(val, addr, idx, memop); |
| } |
| |
| static void tcg_gen_qemu_ld_i64_int(TCGv_i64 val, TCGTemp *addr, |
| TCGArg idx, MemOp memop) |
| { |
| MemOp orig_memop; |
| MemOpIdx orig_oi, oi; |
| TCGv_i64 copy_addr; |
| TCGOpcode opc; |
| |
| if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) { |
| tcg_gen_qemu_ld_i32_int(TCGV_LOW(val), addr, idx, memop); |
| if (memop & MO_SIGN) { |
| tcg_gen_sari_i32(TCGV_HIGH(val), TCGV_LOW(val), 31); |
| } else { |
| tcg_gen_movi_i32(TCGV_HIGH(val), 0); |
| } |
| return; |
| } |
| |
| tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD); |
| orig_memop = memop = tcg_canonicalize_memop(memop, 1, 0); |
| orig_oi = oi = make_memop_idx(memop, idx); |
| |
| if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) { |
| memop &= ~MO_BSWAP; |
| /* The bswap primitive benefits from zero-extended input. */ |
| if ((memop & MO_SIGN) && (memop & MO_SIZE) < MO_64) { |
| memop &= ~MO_SIGN; |
| } |
| oi = make_memop_idx(memop, idx); |
| } |
| |
| copy_addr = plugin_maybe_preserve_addr(addr); |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_ld_a32_i64; |
| } else { |
| opc = INDEX_op_qemu_ld_a64_i64; |
| } |
| gen_ldst_i64(opc, val, addr, oi); |
| plugin_gen_mem_callbacks_i64(val, copy_addr, addr, orig_oi, |
| QEMU_PLUGIN_MEM_R); |
| |
| if ((orig_memop ^ memop) & MO_BSWAP) { |
| int flags = (orig_memop & MO_SIGN |
| ? TCG_BSWAP_IZ | TCG_BSWAP_OS |
| : TCG_BSWAP_IZ | TCG_BSWAP_OZ); |
| switch (orig_memop & MO_SIZE) { |
| case MO_16: |
| tcg_gen_bswap16_i64(val, val, flags); |
| break; |
| case MO_32: |
| tcg_gen_bswap32_i64(val, val, flags); |
| break; |
| case MO_64: |
| tcg_gen_bswap64_i64(val, val); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| } |
| |
| void tcg_gen_qemu_ld_i64_chk(TCGv_i64 val, TCGTemp *addr, TCGArg idx, |
| MemOp memop, TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_64); |
| tcg_gen_qemu_ld_i64_int(val, addr, idx, memop); |
| } |
| |
| static void tcg_gen_qemu_st_i64_int(TCGv_i64 val, TCGTemp *addr, |
| TCGArg idx, MemOp memop) |
| { |
| TCGv_i64 swap = NULL; |
| MemOpIdx orig_oi, oi; |
| TCGOpcode opc; |
| |
| if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) { |
| tcg_gen_qemu_st_i32_int(TCGV_LOW(val), addr, idx, memop); |
| return; |
| } |
| |
| tcg_gen_req_mo(TCG_MO_LD_ST | TCG_MO_ST_ST); |
| memop = tcg_canonicalize_memop(memop, 1, 1); |
| orig_oi = oi = make_memop_idx(memop, idx); |
| |
| if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) { |
| swap = tcg_temp_ebb_new_i64(); |
| switch (memop & MO_SIZE) { |
| case MO_16: |
| tcg_gen_bswap16_i64(swap, val, 0); |
| break; |
| case MO_32: |
| tcg_gen_bswap32_i64(swap, val, 0); |
| break; |
| case MO_64: |
| tcg_gen_bswap64_i64(swap, val); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| val = swap; |
| memop &= ~MO_BSWAP; |
| oi = make_memop_idx(memop, idx); |
| } |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_st_a32_i64; |
| } else { |
| opc = INDEX_op_qemu_st_a64_i64; |
| } |
| gen_ldst_i64(opc, val, addr, oi); |
| plugin_gen_mem_callbacks_i64(val, NULL, addr, orig_oi, QEMU_PLUGIN_MEM_W); |
| |
| if (swap) { |
| tcg_temp_free_i64(swap); |
| } |
| } |
| |
| void tcg_gen_qemu_st_i64_chk(TCGv_i64 val, TCGTemp *addr, TCGArg idx, |
| MemOp memop, TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_64); |
| tcg_gen_qemu_st_i64_int(val, addr, idx, memop); |
| } |
| |
| /* |
| * Return true if @mop, without knowledge of the pointer alignment, |
| * does not require 16-byte atomicity, and it would be adventagous |
| * to avoid a call to a helper function. |
| */ |
| static bool use_two_i64_for_i128(MemOp mop) |
| { |
| /* Two softmmu tlb lookups is larger than one function call. */ |
| if (tcg_use_softmmu) { |
| return false; |
| } |
| |
| /* |
| * For user-only, two 64-bit operations may well be smaller than a call. |
| * Determine if that would be legal for the requested atomicity. |
| */ |
| switch (mop & MO_ATOM_MASK) { |
| case MO_ATOM_NONE: |
| case MO_ATOM_IFALIGN_PAIR: |
| return true; |
| case MO_ATOM_IFALIGN: |
| case MO_ATOM_SUBALIGN: |
| case MO_ATOM_WITHIN16: |
| case MO_ATOM_WITHIN16_PAIR: |
| return false; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void canonicalize_memop_i128_as_i64(MemOp ret[2], MemOp orig) |
| { |
| MemOp mop_1 = orig, mop_2; |
| |
| /* Reduce the size to 64-bit. */ |
| mop_1 = (mop_1 & ~MO_SIZE) | MO_64; |
| |
| /* Retain the alignment constraints of the original. */ |
| switch (orig & MO_AMASK) { |
| case MO_UNALN: |
| case MO_ALIGN_2: |
| case MO_ALIGN_4: |
| mop_2 = mop_1; |
| break; |
| case MO_ALIGN_8: |
| /* Prefer MO_ALIGN+MO_64 to MO_ALIGN_8+MO_64. */ |
| mop_1 = (mop_1 & ~MO_AMASK) | MO_ALIGN; |
| mop_2 = mop_1; |
| break; |
| case MO_ALIGN: |
| /* Second has 8-byte alignment; first has 16-byte alignment. */ |
| mop_2 = mop_1; |
| mop_1 = (mop_1 & ~MO_AMASK) | MO_ALIGN_16; |
| break; |
| case MO_ALIGN_16: |
| case MO_ALIGN_32: |
| case MO_ALIGN_64: |
| /* Second has 8-byte alignment; first retains original. */ |
| mop_2 = (mop_1 & ~MO_AMASK) | MO_ALIGN; |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| |
| /* Use a memory ordering implemented by the host. */ |
| if ((orig & MO_BSWAP) && !tcg_target_has_memory_bswap(mop_1)) { |
| mop_1 &= ~MO_BSWAP; |
| mop_2 &= ~MO_BSWAP; |
| } |
| |
| ret[0] = mop_1; |
| ret[1] = mop_2; |
| } |
| |
| static TCGv_i64 maybe_extend_addr64(TCGTemp *addr) |
| { |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| TCGv_i64 a64 = tcg_temp_ebb_new_i64(); |
| tcg_gen_extu_i32_i64(a64, temp_tcgv_i32(addr)); |
| return a64; |
| } |
| return temp_tcgv_i64(addr); |
| } |
| |
| static void maybe_free_addr64(TCGv_i64 a64) |
| { |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| tcg_temp_free_i64(a64); |
| } |
| } |
| |
| static void tcg_gen_qemu_ld_i128_int(TCGv_i128 val, TCGTemp *addr, |
| TCGArg idx, MemOp memop) |
| { |
| MemOpIdx orig_oi; |
| TCGv_i64 ext_addr = NULL; |
| TCGOpcode opc; |
| |
| check_max_alignment(get_alignment_bits(memop)); |
| tcg_gen_req_mo(TCG_MO_LD_LD | TCG_MO_ST_LD); |
| |
| /* In serial mode, reduce atomicity. */ |
| if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) { |
| memop &= ~MO_ATOM_MASK; |
| memop |= MO_ATOM_NONE; |
| } |
| orig_oi = make_memop_idx(memop, idx); |
| |
| /* TODO: For now, force 32-bit hosts to use the helper. */ |
| if (TCG_TARGET_HAS_qemu_ldst_i128 && TCG_TARGET_REG_BITS == 64) { |
| TCGv_i64 lo, hi; |
| bool need_bswap = false; |
| MemOpIdx oi = orig_oi; |
| |
| if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) { |
| lo = TCGV128_HIGH(val); |
| hi = TCGV128_LOW(val); |
| oi = make_memop_idx(memop & ~MO_BSWAP, idx); |
| need_bswap = true; |
| } else { |
| lo = TCGV128_LOW(val); |
| hi = TCGV128_HIGH(val); |
| } |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_ld_a32_i128; |
| } else { |
| opc = INDEX_op_qemu_ld_a64_i128; |
| } |
| gen_ldst(opc, tcgv_i64_temp(lo), tcgv_i64_temp(hi), addr, oi); |
| |
| if (need_bswap) { |
| tcg_gen_bswap64_i64(lo, lo); |
| tcg_gen_bswap64_i64(hi, hi); |
| } |
| } else if (use_two_i64_for_i128(memop)) { |
| MemOp mop[2]; |
| TCGTemp *addr_p8; |
| TCGv_i64 x, y; |
| bool need_bswap; |
| |
| canonicalize_memop_i128_as_i64(mop, memop); |
| need_bswap = (mop[0] ^ memop) & MO_BSWAP; |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_ld_a32_i64; |
| } else { |
| opc = INDEX_op_qemu_ld_a64_i64; |
| } |
| |
| /* |
| * Since there are no global TCGv_i128, there is no visible state |
| * changed if the second load faults. Load directly into the two |
| * subwords. |
| */ |
| if ((memop & MO_BSWAP) == MO_LE) { |
| x = TCGV128_LOW(val); |
| y = TCGV128_HIGH(val); |
| } else { |
| x = TCGV128_HIGH(val); |
| y = TCGV128_LOW(val); |
| } |
| |
| gen_ldst_i64(opc, x, addr, make_memop_idx(mop[0], idx)); |
| |
| if (need_bswap) { |
| tcg_gen_bswap64_i64(x, x); |
| } |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| TCGv_i32 t = tcg_temp_ebb_new_i32(); |
| tcg_gen_addi_i32(t, temp_tcgv_i32(addr), 8); |
| addr_p8 = tcgv_i32_temp(t); |
| } else { |
| TCGv_i64 t = tcg_temp_ebb_new_i64(); |
| tcg_gen_addi_i64(t, temp_tcgv_i64(addr), 8); |
| addr_p8 = tcgv_i64_temp(t); |
| } |
| |
| gen_ldst_i64(opc, y, addr_p8, make_memop_idx(mop[1], idx)); |
| tcg_temp_free_internal(addr_p8); |
| |
| if (need_bswap) { |
| tcg_gen_bswap64_i64(y, y); |
| } |
| } else { |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| ext_addr = tcg_temp_ebb_new_i64(); |
| tcg_gen_extu_i32_i64(ext_addr, temp_tcgv_i32(addr)); |
| addr = tcgv_i64_temp(ext_addr); |
| } |
| gen_helper_ld_i128(val, tcg_env, temp_tcgv_i64(addr), |
| tcg_constant_i32(orig_oi)); |
| } |
| |
| plugin_gen_mem_callbacks_i128(val, ext_addr, addr, orig_oi, |
| QEMU_PLUGIN_MEM_R); |
| } |
| |
| void tcg_gen_qemu_ld_i128_chk(TCGv_i128 val, TCGTemp *addr, TCGArg idx, |
| MemOp memop, TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) == MO_128); |
| tcg_debug_assert((memop & MO_SIGN) == 0); |
| tcg_gen_qemu_ld_i128_int(val, addr, idx, memop); |
| } |
| |
| static void tcg_gen_qemu_st_i128_int(TCGv_i128 val, TCGTemp *addr, |
| TCGArg idx, MemOp memop) |
| { |
| MemOpIdx orig_oi; |
| TCGv_i64 ext_addr = NULL; |
| TCGOpcode opc; |
| |
| check_max_alignment(get_alignment_bits(memop)); |
| tcg_gen_req_mo(TCG_MO_ST_LD | TCG_MO_ST_ST); |
| |
| /* In serial mode, reduce atomicity. */ |
| if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) { |
| memop &= ~MO_ATOM_MASK; |
| memop |= MO_ATOM_NONE; |
| } |
| orig_oi = make_memop_idx(memop, idx); |
| |
| /* TODO: For now, force 32-bit hosts to use the helper. */ |
| |
| if (TCG_TARGET_HAS_qemu_ldst_i128 && TCG_TARGET_REG_BITS == 64) { |
| TCGv_i64 lo, hi; |
| MemOpIdx oi = orig_oi; |
| bool need_bswap = false; |
| |
| if ((memop & MO_BSWAP) && !tcg_target_has_memory_bswap(memop)) { |
| lo = tcg_temp_ebb_new_i64(); |
| hi = tcg_temp_ebb_new_i64(); |
| tcg_gen_bswap64_i64(lo, TCGV128_HIGH(val)); |
| tcg_gen_bswap64_i64(hi, TCGV128_LOW(val)); |
| oi = make_memop_idx(memop & ~MO_BSWAP, idx); |
| need_bswap = true; |
| } else { |
| lo = TCGV128_LOW(val); |
| hi = TCGV128_HIGH(val); |
| } |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_st_a32_i128; |
| } else { |
| opc = INDEX_op_qemu_st_a64_i128; |
| } |
| gen_ldst(opc, tcgv_i64_temp(lo), tcgv_i64_temp(hi), addr, oi); |
| |
| if (need_bswap) { |
| tcg_temp_free_i64(lo); |
| tcg_temp_free_i64(hi); |
| } |
| } else if (use_two_i64_for_i128(memop)) { |
| MemOp mop[2]; |
| TCGTemp *addr_p8; |
| TCGv_i64 x, y, b = NULL; |
| |
| canonicalize_memop_i128_as_i64(mop, memop); |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| opc = INDEX_op_qemu_st_a32_i64; |
| } else { |
| opc = INDEX_op_qemu_st_a64_i64; |
| } |
| |
| if ((memop & MO_BSWAP) == MO_LE) { |
| x = TCGV128_LOW(val); |
| y = TCGV128_HIGH(val); |
| } else { |
| x = TCGV128_HIGH(val); |
| y = TCGV128_LOW(val); |
| } |
| |
| if ((mop[0] ^ memop) & MO_BSWAP) { |
| b = tcg_temp_ebb_new_i64(); |
| tcg_gen_bswap64_i64(b, x); |
| x = b; |
| } |
| |
| gen_ldst_i64(opc, x, addr, make_memop_idx(mop[0], idx)); |
| |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| TCGv_i32 t = tcg_temp_ebb_new_i32(); |
| tcg_gen_addi_i32(t, temp_tcgv_i32(addr), 8); |
| addr_p8 = tcgv_i32_temp(t); |
| } else { |
| TCGv_i64 t = tcg_temp_ebb_new_i64(); |
| tcg_gen_addi_i64(t, temp_tcgv_i64(addr), 8); |
| addr_p8 = tcgv_i64_temp(t); |
| } |
| |
| if (b) { |
| tcg_gen_bswap64_i64(b, y); |
| gen_ldst_i64(opc, b, addr_p8, make_memop_idx(mop[1], idx)); |
| tcg_temp_free_i64(b); |
| } else { |
| gen_ldst_i64(opc, y, addr_p8, make_memop_idx(mop[1], idx)); |
| } |
| tcg_temp_free_internal(addr_p8); |
| } else { |
| if (tcg_ctx->addr_type == TCG_TYPE_I32) { |
| ext_addr = tcg_temp_ebb_new_i64(); |
| tcg_gen_extu_i32_i64(ext_addr, temp_tcgv_i32(addr)); |
| addr = tcgv_i64_temp(ext_addr); |
| } |
| gen_helper_st_i128(tcg_env, temp_tcgv_i64(addr), val, |
| tcg_constant_i32(orig_oi)); |
| } |
| |
| plugin_gen_mem_callbacks_i128(val, ext_addr, addr, orig_oi, |
| QEMU_PLUGIN_MEM_W); |
| } |
| |
| void tcg_gen_qemu_st_i128_chk(TCGv_i128 val, TCGTemp *addr, TCGArg idx, |
| MemOp memop, TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) == MO_128); |
| tcg_debug_assert((memop & MO_SIGN) == 0); |
| tcg_gen_qemu_st_i128_int(val, addr, idx, memop); |
| } |
| |
| void tcg_gen_ext_i32(TCGv_i32 ret, TCGv_i32 val, MemOp opc) |
| { |
| switch (opc & MO_SSIZE) { |
| case MO_SB: |
| tcg_gen_ext8s_i32(ret, val); |
| break; |
| case MO_UB: |
| tcg_gen_ext8u_i32(ret, val); |
| break; |
| case MO_SW: |
| tcg_gen_ext16s_i32(ret, val); |
| break; |
| case MO_UW: |
| tcg_gen_ext16u_i32(ret, val); |
| break; |
| case MO_UL: |
| case MO_SL: |
| tcg_gen_mov_i32(ret, val); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| void tcg_gen_ext_i64(TCGv_i64 ret, TCGv_i64 val, MemOp opc) |
| { |
| switch (opc & MO_SSIZE) { |
| case MO_SB: |
| tcg_gen_ext8s_i64(ret, val); |
| break; |
| case MO_UB: |
| tcg_gen_ext8u_i64(ret, val); |
| break; |
| case MO_SW: |
| tcg_gen_ext16s_i64(ret, val); |
| break; |
| case MO_UW: |
| tcg_gen_ext16u_i64(ret, val); |
| break; |
| case MO_SL: |
| tcg_gen_ext32s_i64(ret, val); |
| break; |
| case MO_UL: |
| tcg_gen_ext32u_i64(ret, val); |
| break; |
| case MO_UQ: |
| case MO_SQ: |
| tcg_gen_mov_i64(ret, val); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| typedef void (*gen_atomic_cx_i32)(TCGv_i32, TCGv_env, TCGv_i64, |
| TCGv_i32, TCGv_i32, TCGv_i32); |
| typedef void (*gen_atomic_cx_i64)(TCGv_i64, TCGv_env, TCGv_i64, |
| TCGv_i64, TCGv_i64, TCGv_i32); |
| typedef void (*gen_atomic_cx_i128)(TCGv_i128, TCGv_env, TCGv_i64, |
| TCGv_i128, TCGv_i128, TCGv_i32); |
| typedef void (*gen_atomic_op_i32)(TCGv_i32, TCGv_env, TCGv_i64, |
| TCGv_i32, TCGv_i32); |
| typedef void (*gen_atomic_op_i64)(TCGv_i64, TCGv_env, TCGv_i64, |
| TCGv_i64, TCGv_i32); |
| |
| #ifdef CONFIG_ATOMIC64 |
| # define WITH_ATOMIC64(X) X, |
| #else |
| # define WITH_ATOMIC64(X) |
| #endif |
| #if HAVE_CMPXCHG128 |
| # define WITH_ATOMIC128(X) X, |
| #else |
| # define WITH_ATOMIC128(X) |
| #endif |
| |
| static void * const table_cmpxchg[(MO_SIZE | MO_BSWAP) + 1] = { |
| [MO_8] = gen_helper_atomic_cmpxchgb, |
| [MO_16 | MO_LE] = gen_helper_atomic_cmpxchgw_le, |
| [MO_16 | MO_BE] = gen_helper_atomic_cmpxchgw_be, |
| [MO_32 | MO_LE] = gen_helper_atomic_cmpxchgl_le, |
| [MO_32 | MO_BE] = gen_helper_atomic_cmpxchgl_be, |
| WITH_ATOMIC64([MO_64 | MO_LE] = gen_helper_atomic_cmpxchgq_le) |
| WITH_ATOMIC64([MO_64 | MO_BE] = gen_helper_atomic_cmpxchgq_be) |
| WITH_ATOMIC128([MO_128 | MO_LE] = gen_helper_atomic_cmpxchgo_le) |
| WITH_ATOMIC128([MO_128 | MO_BE] = gen_helper_atomic_cmpxchgo_be) |
| }; |
| |
| static void tcg_gen_nonatomic_cmpxchg_i32_int(TCGv_i32 retv, TCGTemp *addr, |
| TCGv_i32 cmpv, TCGv_i32 newv, |
| TCGArg idx, MemOp memop) |
| { |
| TCGv_i32 t1 = tcg_temp_ebb_new_i32(); |
| TCGv_i32 t2 = tcg_temp_ebb_new_i32(); |
| |
| tcg_gen_ext_i32(t2, cmpv, memop & MO_SIZE); |
| |
| tcg_gen_qemu_ld_i32_int(t1, addr, idx, memop & ~MO_SIGN); |
| tcg_gen_movcond_i32(TCG_COND_EQ, t2, t1, t2, newv, t1); |
| tcg_gen_qemu_st_i32_int(t2, addr, idx, memop); |
| tcg_temp_free_i32(t2); |
| |
| if (memop & MO_SIGN) { |
| tcg_gen_ext_i32(retv, t1, memop); |
| } else { |
| tcg_gen_mov_i32(retv, t1); |
| } |
| tcg_temp_free_i32(t1); |
| } |
| |
| void tcg_gen_nonatomic_cmpxchg_i32_chk(TCGv_i32 retv, TCGTemp *addr, |
| TCGv_i32 cmpv, TCGv_i32 newv, |
| TCGArg idx, MemOp memop, |
| TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_32); |
| tcg_gen_nonatomic_cmpxchg_i32_int(retv, addr, cmpv, newv, idx, memop); |
| } |
| |
| static void tcg_gen_atomic_cmpxchg_i32_int(TCGv_i32 retv, TCGTemp *addr, |
| TCGv_i32 cmpv, TCGv_i32 newv, |
| TCGArg idx, MemOp memop) |
| { |
| gen_atomic_cx_i32 gen; |
| TCGv_i64 a64; |
| MemOpIdx oi; |
| |
| if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) { |
| tcg_gen_nonatomic_cmpxchg_i32_int(retv, addr, cmpv, newv, idx, memop); |
| return; |
| } |
| |
| memop = tcg_canonicalize_memop(memop, 0, 0); |
| gen = table_cmpxchg[memop & (MO_SIZE | MO_BSWAP)]; |
| tcg_debug_assert(gen != NULL); |
| |
| oi = make_memop_idx(memop & ~MO_SIGN, idx); |
| a64 = maybe_extend_addr64(addr); |
| gen(retv, tcg_env, a64, cmpv, newv, tcg_constant_i32(oi)); |
| maybe_free_addr64(a64); |
| |
| if (memop & MO_SIGN) { |
| tcg_gen_ext_i32(retv, retv, memop); |
| } |
| } |
| |
| void tcg_gen_atomic_cmpxchg_i32_chk(TCGv_i32 retv, TCGTemp *addr, |
| TCGv_i32 cmpv, TCGv_i32 newv, |
| TCGArg idx, MemOp memop, |
| TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_32); |
| tcg_gen_atomic_cmpxchg_i32_int(retv, addr, cmpv, newv, idx, memop); |
| } |
| |
| static void tcg_gen_nonatomic_cmpxchg_i64_int(TCGv_i64 retv, TCGTemp *addr, |
| TCGv_i64 cmpv, TCGv_i64 newv, |
| TCGArg idx, MemOp memop) |
| { |
| TCGv_i64 t1, t2; |
| |
| if (TCG_TARGET_REG_BITS == 32 && (memop & MO_SIZE) < MO_64) { |
| tcg_gen_nonatomic_cmpxchg_i32_int(TCGV_LOW(retv), addr, TCGV_LOW(cmpv), |
| TCGV_LOW(newv), idx, memop); |
| if (memop & MO_SIGN) { |
| tcg_gen_sari_i32(TCGV_HIGH(retv), TCGV_LOW(retv), 31); |
| } else { |
| tcg_gen_movi_i32(TCGV_HIGH(retv), 0); |
| } |
| return; |
| } |
| |
| t1 = tcg_temp_ebb_new_i64(); |
| t2 = tcg_temp_ebb_new_i64(); |
| |
| tcg_gen_ext_i64(t2, cmpv, memop & MO_SIZE); |
| |
| tcg_gen_qemu_ld_i64_int(t1, addr, idx, memop & ~MO_SIGN); |
| tcg_gen_movcond_i64(TCG_COND_EQ, t2, t1, t2, newv, t1); |
| tcg_gen_qemu_st_i64_int(t2, addr, idx, memop); |
| tcg_temp_free_i64(t2); |
| |
| if (memop & MO_SIGN) { |
| tcg_gen_ext_i64(retv, t1, memop); |
| } else { |
| tcg_gen_mov_i64(retv, t1); |
| } |
| tcg_temp_free_i64(t1); |
| } |
| |
| void tcg_gen_nonatomic_cmpxchg_i64_chk(TCGv_i64 retv, TCGTemp *addr, |
| TCGv_i64 cmpv, TCGv_i64 newv, |
| TCGArg idx, MemOp memop, |
| TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_64); |
| tcg_gen_nonatomic_cmpxchg_i64_int(retv, addr, cmpv, newv, idx, memop); |
| } |
| |
| static void tcg_gen_atomic_cmpxchg_i64_int(TCGv_i64 retv, TCGTemp *addr, |
| TCGv_i64 cmpv, TCGv_i64 newv, |
| TCGArg idx, MemOp memop) |
| { |
| if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) { |
| tcg_gen_nonatomic_cmpxchg_i64_int(retv, addr, cmpv, newv, idx, memop); |
| return; |
| } |
| |
| if ((memop & MO_SIZE) == MO_64) { |
| gen_atomic_cx_i64 gen; |
| |
| memop = tcg_canonicalize_memop(memop, 1, 0); |
| gen = table_cmpxchg[memop & (MO_SIZE | MO_BSWAP)]; |
| if (gen) { |
| MemOpIdx oi = make_memop_idx(memop, idx); |
| TCGv_i64 a64 = maybe_extend_addr64(addr); |
| gen(retv, tcg_env, a64, cmpv, newv, tcg_constant_i32(oi)); |
| maybe_free_addr64(a64); |
| return; |
| } |
| |
| gen_helper_exit_atomic(tcg_env); |
| |
| /* |
| * Produce a result for a well-formed opcode stream. This satisfies |
| * liveness for set before used, which happens before this dead code |
| * is removed. |
| */ |
| tcg_gen_movi_i64(retv, 0); |
| return; |
| } |
| |
| if (TCG_TARGET_REG_BITS == 32) { |
| tcg_gen_atomic_cmpxchg_i32_int(TCGV_LOW(retv), addr, TCGV_LOW(cmpv), |
| TCGV_LOW(newv), idx, memop); |
| if (memop & MO_SIGN) { |
| tcg_gen_sari_i32(TCGV_HIGH(retv), TCGV_LOW(retv), 31); |
| } else { |
| tcg_gen_movi_i32(TCGV_HIGH(retv), 0); |
| } |
| } else { |
| TCGv_i32 c32 = tcg_temp_ebb_new_i32(); |
| TCGv_i32 n32 = tcg_temp_ebb_new_i32(); |
| TCGv_i32 r32 = tcg_temp_ebb_new_i32(); |
| |
| tcg_gen_extrl_i64_i32(c32, cmpv); |
| tcg_gen_extrl_i64_i32(n32, newv); |
| tcg_gen_atomic_cmpxchg_i32_int(r32, addr, c32, n32, |
| idx, memop & ~MO_SIGN); |
| tcg_temp_free_i32(c32); |
| tcg_temp_free_i32(n32); |
| |
| tcg_gen_extu_i32_i64(retv, r32); |
| tcg_temp_free_i32(r32); |
| |
| if (memop & MO_SIGN) { |
| tcg_gen_ext_i64(retv, retv, memop); |
| } |
| } |
| } |
| |
| void tcg_gen_atomic_cmpxchg_i64_chk(TCGv_i64 retv, TCGTemp *addr, |
| TCGv_i64 cmpv, TCGv_i64 newv, |
| TCGArg idx, MemOp memop, TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & MO_SIZE) <= MO_64); |
| tcg_gen_atomic_cmpxchg_i64_int(retv, addr, cmpv, newv, idx, memop); |
| } |
| |
| static void tcg_gen_nonatomic_cmpxchg_i128_int(TCGv_i128 retv, TCGTemp *addr, |
| TCGv_i128 cmpv, TCGv_i128 newv, |
| TCGArg idx, MemOp memop) |
| { |
| if (TCG_TARGET_REG_BITS == 32) { |
| /* Inline expansion below is simply too large for 32-bit hosts. */ |
| MemOpIdx oi = make_memop_idx(memop, idx); |
| TCGv_i64 a64 = maybe_extend_addr64(addr); |
| |
| gen_helper_nonatomic_cmpxchgo(retv, tcg_env, a64, cmpv, newv, |
| tcg_constant_i32(oi)); |
| maybe_free_addr64(a64); |
| } else { |
| TCGv_i128 oldv = tcg_temp_ebb_new_i128(); |
| TCGv_i128 tmpv = tcg_temp_ebb_new_i128(); |
| TCGv_i64 t0 = tcg_temp_ebb_new_i64(); |
| TCGv_i64 t1 = tcg_temp_ebb_new_i64(); |
| TCGv_i64 z = tcg_constant_i64(0); |
| |
| tcg_gen_qemu_ld_i128_int(oldv, addr, idx, memop); |
| |
| /* Compare i128 */ |
| tcg_gen_xor_i64(t0, TCGV128_LOW(oldv), TCGV128_LOW(cmpv)); |
| tcg_gen_xor_i64(t1, TCGV128_HIGH(oldv), TCGV128_HIGH(cmpv)); |
| tcg_gen_or_i64(t0, t0, t1); |
| |
| /* tmpv = equal ? newv : oldv */ |
| tcg_gen_movcond_i64(TCG_COND_EQ, TCGV128_LOW(tmpv), t0, z, |
| TCGV128_LOW(newv), TCGV128_LOW(oldv)); |
| tcg_gen_movcond_i64(TCG_COND_EQ, TCGV128_HIGH(tmpv), t0, z, |
| TCGV128_HIGH(newv), TCGV128_HIGH(oldv)); |
| |
| /* Unconditional writeback. */ |
| tcg_gen_qemu_st_i128_int(tmpv, addr, idx, memop); |
| tcg_gen_mov_i128(retv, oldv); |
| |
| tcg_temp_free_i64(t0); |
| tcg_temp_free_i64(t1); |
| tcg_temp_free_i128(tmpv); |
| tcg_temp_free_i128(oldv); |
| } |
| } |
| |
| void tcg_gen_nonatomic_cmpxchg_i128_chk(TCGv_i128 retv, TCGTemp *addr, |
| TCGv_i128 cmpv, TCGv_i128 newv, |
| TCGArg idx, MemOp memop, |
| TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & (MO_SIZE | MO_SIGN)) == MO_128); |
| tcg_gen_nonatomic_cmpxchg_i128_int(retv, addr, cmpv, newv, idx, memop); |
| } |
| |
| static void tcg_gen_atomic_cmpxchg_i128_int(TCGv_i128 retv, TCGTemp *addr, |
| TCGv_i128 cmpv, TCGv_i128 newv, |
| TCGArg idx, MemOp memop) |
| { |
| gen_atomic_cx_i128 gen; |
| |
| if (!(tcg_ctx->gen_tb->cflags & CF_PARALLEL)) { |
| tcg_gen_nonatomic_cmpxchg_i128_int(retv, addr, cmpv, newv, idx, memop); |
| return; |
| } |
| |
| gen = table_cmpxchg[memop & (MO_SIZE | MO_BSWAP)]; |
| if (gen) { |
| MemOpIdx oi = make_memop_idx(memop, idx); |
| TCGv_i64 a64 = maybe_extend_addr64(addr); |
| gen(retv, tcg_env, a64, cmpv, newv, tcg_constant_i32(oi)); |
| maybe_free_addr64(a64); |
| return; |
| } |
| |
| gen_helper_exit_atomic(tcg_env); |
| |
| /* |
| * Produce a result for a well-formed opcode stream. This satisfies |
| * liveness for set before used, which happens before this dead code |
| * is removed. |
| */ |
| tcg_gen_movi_i64(TCGV128_LOW(retv), 0); |
| tcg_gen_movi_i64(TCGV128_HIGH(retv), 0); |
| } |
| |
| void tcg_gen_atomic_cmpxchg_i128_chk(TCGv_i128 retv, TCGTemp *addr, |
| TCGv_i128 cmpv, TCGv_i128 newv, |
| TCGArg idx, MemOp memop, |
| TCGType addr_type) |
| { |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); |
| tcg_debug_assert((memop & (MO_SIZE | MO_SIGN)) == MO_128); |
| tcg_gen_atomic_cmpxchg_i128_int(retv, addr, cmpv, newv, idx, memop); |
| } |
| |
| static void do_nonatomic_op_i32(TCGv_i32 ret, TCGTemp *addr, TCGv_i32 val, |
| TCGArg idx, MemOp memop, bool new_val, |
| void (*gen)(TCGv_i32, TCGv_i32, TCGv_i32)) |
| { |
| TCGv_i32 t1 = tcg_temp_ebb_new_i32(); |
| TCGv_i32 t2 = tcg_temp_ebb_new_i32(); |
| |
| memop = tcg_canonicalize_memop(memop, 0, 0); |
| |
| tcg_gen_qemu_ld_i32_int(t1, addr, idx, memop); |
| tcg_gen_ext_i32(t2, val, memop); |
| gen(t2, t1, t2); |
| tcg_gen_qemu_st_i32_int(t2, addr, idx, memop); |
| |
| tcg_gen_ext_i32(ret, (new_val ? t2 : t1), memop); |
| tcg_temp_free_i32(t1); |
| tcg_temp_free_i32(t2); |
| } |
| |
| static void do_atomic_op_i32(TCGv_i32 ret, TCGTemp *addr, TCGv_i32 val, |
| TCGArg idx, MemOp memop, void * const table[]) |
| { |
| gen_atomic_op_i32 gen; |
| TCGv_i64 a64; |
| MemOpIdx oi; |
| |
| memop = tcg_canonicalize_memop(memop, 0, 0); |
| |
| gen = table[memop & (MO_SIZE | MO_BSWAP)]; |
| tcg_debug_assert(gen != NULL); |
| |
| oi = make_memop_idx(memop & ~MO_SIGN, idx); |
| a64 = maybe_extend_addr64(addr); |
| gen(ret, tcg_env, a64, val, tcg_constant_i32(oi)); |
| maybe_free_addr64(a64); |
| |
| if (memop & MO_SIGN) { |
| tcg_gen_ext_i32(ret, ret, memop); |
| } |
| } |
| |
| static void do_nonatomic_op_i64(TCGv_i64 ret, TCGTemp *addr, TCGv_i64 val, |
| TCGArg idx, MemOp memop, bool new_val, |
| void (*gen)(TCGv_i64, TCGv_i64, TCGv_i64)) |
| { |
| TCGv_i64 t1 = tcg_temp_ebb_new_i64(); |
| TCGv_i64 t2 = tcg_temp_ebb_new_i64(); |
| |
| memop = tcg_canonicalize_memop(memop, 1, 0); |
| |
| tcg_gen_qemu_ld_i64_int(t1, addr, idx, memop); |
| tcg_gen_ext_i64(t2, val, memop); |
| gen(t2, t1, t2); |
| tcg_gen_qemu_st_i64_int(t2, addr, idx, memop); |
| |
| tcg_gen_ext_i64(ret, (new_val ? t2 : t1), memop); |
| tcg_temp_free_i64(t1); |
| tcg_temp_free_i64(t2); |
| } |
| |
| static void do_atomic_op_i64(TCGv_i64 ret, TCGTemp *addr, TCGv_i64 val, |
| TCGArg idx, MemOp memop, void * const table[]) |
| { |
| memop = tcg_canonicalize_memop(memop, 1, 0); |
| |
| if ((memop & MO_SIZE) == MO_64) { |
| gen_atomic_op_i64 gen = table[memop & (MO_SIZE | MO_BSWAP)]; |
| |
| if (gen) { |
| MemOpIdx oi = make_memop_idx(memop & ~MO_SIGN, idx); |
| TCGv_i64 a64 = maybe_extend_addr64(addr); |
| gen(ret, tcg_env, a64, val, tcg_constant_i32(oi)); |
| maybe_free_addr64(a64); |
| return; |
| } |
| |
| gen_helper_exit_atomic(tcg_env); |
| /* Produce a result, so that we have a well-formed opcode stream |
| with respect to uses of the result in the (dead) code following. */ |
| tcg_gen_movi_i64(ret, 0); |
| } else { |
| TCGv_i32 v32 = tcg_temp_ebb_new_i32(); |
| TCGv_i32 r32 = tcg_temp_ebb_new_i32(); |
| |
| tcg_gen_extrl_i64_i32(v32, val); |
| do_atomic_op_i32(r32, addr, v32, idx, memop & ~MO_SIGN, table); |
| tcg_temp_free_i32(v32); |
| |
| tcg_gen_extu_i32_i64(ret, r32); |
| tcg_temp_free_i32(r32); |
| |
| if (memop & MO_SIGN) { |
| tcg_gen_ext_i64(ret, ret, memop); |
| } |
| } |
| } |
| |
| #define GEN_ATOMIC_HELPER(NAME, OP, NEW) \ |
| static void * const table_##NAME[(MO_SIZE | MO_BSWAP) + 1] = { \ |
| [MO_8] = gen_helper_atomic_##NAME##b, \ |
| [MO_16 | MO_LE] = gen_helper_atomic_##NAME##w_le, \ |
| [MO_16 | MO_BE] = gen_helper_atomic_##NAME##w_be, \ |
| [MO_32 | MO_LE] = gen_helper_atomic_##NAME##l_le, \ |
| [MO_32 | MO_BE] = gen_helper_atomic_##NAME##l_be, \ |
| WITH_ATOMIC64([MO_64 | MO_LE] = gen_helper_atomic_##NAME##q_le) \ |
| WITH_ATOMIC64([MO_64 | MO_BE] = gen_helper_atomic_##NAME##q_be) \ |
| }; \ |
| void tcg_gen_atomic_##NAME##_i32_chk(TCGv_i32 ret, TCGTemp *addr, \ |
| TCGv_i32 val, TCGArg idx, \ |
| MemOp memop, TCGType addr_type) \ |
| { \ |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); \ |
| tcg_debug_assert((memop & MO_SIZE) <= MO_32); \ |
| if (tcg_ctx->gen_tb->cflags & CF_PARALLEL) { \ |
| do_atomic_op_i32(ret, addr, val, idx, memop, table_##NAME); \ |
| } else { \ |
| do_nonatomic_op_i32(ret, addr, val, idx, memop, NEW, \ |
| tcg_gen_##OP##_i32); \ |
| } \ |
| } \ |
| void tcg_gen_atomic_##NAME##_i64_chk(TCGv_i64 ret, TCGTemp *addr, \ |
| TCGv_i64 val, TCGArg idx, \ |
| MemOp memop, TCGType addr_type) \ |
| { \ |
| tcg_debug_assert(addr_type == tcg_ctx->addr_type); \ |
| tcg_debug_assert((memop & MO_SIZE) <= MO_64); \ |
| if (tcg_ctx->gen_tb->cflags & CF_PARALLEL) { \ |
| do_atomic_op_i64(ret, addr, val, idx, memop, table_##NAME); \ |
| } else { \ |
| do_nonatomic_op_i64(ret, addr, val, idx, memop, NEW, \ |
| tcg_gen_##OP##_i64); \ |
| } \ |
| } |
| |
| GEN_ATOMIC_HELPER(fetch_add, add, 0) |
| GEN_ATOMIC_HELPER(fetch_and, and, 0) |
| GEN_ATOMIC_HELPER(fetch_or, or, 0) |
| GEN_ATOMIC_HELPER(fetch_xor, xor, 0) |
| GEN_ATOMIC_HELPER(fetch_smin, smin, 0) |
| GEN_ATOMIC_HELPER(fetch_umin, umin, 0) |
| GEN_ATOMIC_HELPER(fetch_smax, smax, 0) |
| GEN_ATOMIC_HELPER(fetch_umax, umax, 0) |
| |
| GEN_ATOMIC_HELPER(add_fetch, add, 1) |
| GEN_ATOMIC_HELPER(and_fetch, and, 1) |
| GEN_ATOMIC_HELPER(or_fetch, or, 1) |
| GEN_ATOMIC_HELPER(xor_fetch, xor, 1) |
| GEN_ATOMIC_HELPER(smin_fetch, smin, 1) |
| GEN_ATOMIC_HELPER(umin_fetch, umin, 1) |
| GEN_ATOMIC_HELPER(smax_fetch, smax, 1) |
| GEN_ATOMIC_HELPER(umax_fetch, umax, 1) |
| |
| static void tcg_gen_mov2_i32(TCGv_i32 r, TCGv_i32 a, TCGv_i32 b) |
| { |
| tcg_gen_mov_i32(r, b); |
| } |
| |
| static void tcg_gen_mov2_i64(TCGv_i64 r, TCGv_i64 a, TCGv_i64 b) |
| { |
| tcg_gen_mov_i64(r, b); |
| } |
| |
| GEN_ATOMIC_HELPER(xchg, mov2, 0) |
| |
| #undef GEN_ATOMIC_HELPER |
