| /* |
| * Tiny Code Generator for QEMU |
| * |
| * Copyright (c) 2021 WANG Xuerui <git@xen0n.name> |
| * |
| * Based on tcg/riscv/tcg-target.c.inc |
| * |
| * Copyright (c) 2018 SiFive, Inc |
| * Copyright (c) 2008-2009 Arnaud Patard <arnaud.patard@rtp-net.org> |
| * Copyright (c) 2009 Aurelien Jarno <aurelien@aurel32.net> |
| * 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 "../tcg-ldst.c.inc" |
| |
| #ifdef CONFIG_DEBUG_TCG |
| static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { |
| "zero", |
| "ra", |
| "tp", |
| "sp", |
| "a0", |
| "a1", |
| "a2", |
| "a3", |
| "a4", |
| "a5", |
| "a6", |
| "a7", |
| "t0", |
| "t1", |
| "t2", |
| "t3", |
| "t4", |
| "t5", |
| "t6", |
| "t7", |
| "t8", |
| "r21", /* reserved in the LP64* ABI, hence no ABI name */ |
| "s9", |
| "s0", |
| "s1", |
| "s2", |
| "s3", |
| "s4", |
| "s5", |
| "s6", |
| "s7", |
| "s8" |
| }; |
| #endif |
| |
| static const int tcg_target_reg_alloc_order[] = { |
| /* Registers preserved across calls */ |
| /* TCG_REG_S0 reserved for TCG_AREG0 */ |
| TCG_REG_S1, |
| TCG_REG_S2, |
| TCG_REG_S3, |
| TCG_REG_S4, |
| TCG_REG_S5, |
| TCG_REG_S6, |
| TCG_REG_S7, |
| TCG_REG_S8, |
| TCG_REG_S9, |
| |
| /* Registers (potentially) clobbered across calls */ |
| TCG_REG_T0, |
| TCG_REG_T1, |
| TCG_REG_T2, |
| TCG_REG_T3, |
| TCG_REG_T4, |
| TCG_REG_T5, |
| TCG_REG_T6, |
| TCG_REG_T7, |
| TCG_REG_T8, |
| |
| /* Argument registers, opposite order of allocation. */ |
| TCG_REG_A7, |
| TCG_REG_A6, |
| TCG_REG_A5, |
| TCG_REG_A4, |
| TCG_REG_A3, |
| TCG_REG_A2, |
| TCG_REG_A1, |
| TCG_REG_A0, |
| }; |
| |
| static const int tcg_target_call_iarg_regs[] = { |
| TCG_REG_A0, |
| TCG_REG_A1, |
| TCG_REG_A2, |
| TCG_REG_A3, |
| TCG_REG_A4, |
| TCG_REG_A5, |
| TCG_REG_A6, |
| TCG_REG_A7, |
| }; |
| |
| static const int tcg_target_call_oarg_regs[] = { |
| TCG_REG_A0, |
| TCG_REG_A1, |
| }; |
| |
| #ifndef CONFIG_SOFTMMU |
| #define USE_GUEST_BASE (guest_base != 0) |
| #define TCG_GUEST_BASE_REG TCG_REG_S1 |
| #endif |
| |
| #define TCG_CT_CONST_ZERO 0x100 |
| #define TCG_CT_CONST_S12 0x200 |
| #define TCG_CT_CONST_N12 0x400 |
| #define TCG_CT_CONST_U12 0x800 |
| #define TCG_CT_CONST_C12 0x1000 |
| #define TCG_CT_CONST_WSZ 0x2000 |
| |
| #define ALL_GENERAL_REGS MAKE_64BIT_MASK(0, 32) |
| /* |
| * For softmmu, we need to avoid conflicts with the first 5 |
| * argument registers to call the helper. Some of these are |
| * also used for the tlb lookup. |
| */ |
| #ifdef CONFIG_SOFTMMU |
| #define SOFTMMU_RESERVE_REGS MAKE_64BIT_MASK(TCG_REG_A0, 5) |
| #else |
| #define SOFTMMU_RESERVE_REGS 0 |
| #endif |
| |
| |
| static inline tcg_target_long sextreg(tcg_target_long val, int pos, int len) |
| { |
| return sextract64(val, pos, len); |
| } |
| |
| /* test if a constant matches the constraint */ |
| static bool tcg_target_const_match(int64_t val, TCGType type, int ct) |
| { |
| if (ct & TCG_CT_CONST) { |
| return true; |
| } |
| if ((ct & TCG_CT_CONST_ZERO) && val == 0) { |
| return true; |
| } |
| if ((ct & TCG_CT_CONST_S12) && val == sextreg(val, 0, 12)) { |
| return true; |
| } |
| if ((ct & TCG_CT_CONST_N12) && -val == sextreg(-val, 0, 12)) { |
| return true; |
| } |
| if ((ct & TCG_CT_CONST_U12) && val >= 0 && val <= 0xfff) { |
| return true; |
| } |
| if ((ct & TCG_CT_CONST_C12) && ~val >= 0 && ~val <= 0xfff) { |
| return true; |
| } |
| if ((ct & TCG_CT_CONST_WSZ) && val == (type == TCG_TYPE_I32 ? 32 : 64)) { |
| return true; |
| } |
| return false; |
| } |
| |
| /* |
| * Relocations |
| */ |
| |
| /* |
| * Relocation records defined in LoongArch ELF psABI v1.00 is way too |
| * complicated; a whopping stack machine is needed to stuff the fields, at |
| * the very least one SOP_PUSH and one SOP_POP (of the correct format) are |
| * needed. |
| * |
| * Hence, define our own simpler relocation types. Numbers are chosen as to |
| * not collide with potential future additions to the true ELF relocation |
| * type enum. |
| */ |
| |
| /* Field Sk16, shifted right by 2; suitable for conditional jumps */ |
| #define R_LOONGARCH_BR_SK16 256 |
| /* Field Sd10k16, shifted right by 2; suitable for B and BL */ |
| #define R_LOONGARCH_BR_SD10K16 257 |
| |
| static bool reloc_br_sk16(tcg_insn_unit *src_rw, const tcg_insn_unit *target) |
| { |
| const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); |
| intptr_t offset = (intptr_t)target - (intptr_t)src_rx; |
| |
| tcg_debug_assert((offset & 3) == 0); |
| offset >>= 2; |
| if (offset == sextreg(offset, 0, 16)) { |
| *src_rw = deposit64(*src_rw, 10, 16, offset); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool reloc_br_sd10k16(tcg_insn_unit *src_rw, |
| const tcg_insn_unit *target) |
| { |
| const tcg_insn_unit *src_rx = tcg_splitwx_to_rx(src_rw); |
| intptr_t offset = (intptr_t)target - (intptr_t)src_rx; |
| |
| tcg_debug_assert((offset & 3) == 0); |
| offset >>= 2; |
| if (offset == sextreg(offset, 0, 26)) { |
| *src_rw = deposit64(*src_rw, 0, 10, offset >> 16); /* slot d10 */ |
| *src_rw = deposit64(*src_rw, 10, 16, offset); /* slot k16 */ |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool patch_reloc(tcg_insn_unit *code_ptr, int type, |
| intptr_t value, intptr_t addend) |
| { |
| tcg_debug_assert(addend == 0); |
| switch (type) { |
| case R_LOONGARCH_BR_SK16: |
| return reloc_br_sk16(code_ptr, (tcg_insn_unit *)value); |
| case R_LOONGARCH_BR_SD10K16: |
| return reloc_br_sd10k16(code_ptr, (tcg_insn_unit *)value); |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| #include "tcg-insn-defs.c.inc" |
| |
| /* |
| * TCG intrinsics |
| */ |
| |
| static void tcg_out_mb(TCGContext *s, TCGArg a0) |
| { |
| /* Baseline LoongArch only has the full barrier, unfortunately. */ |
| tcg_out_opc_dbar(s, 0); |
| } |
| |
| static bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) |
| { |
| if (ret == arg) { |
| return true; |
| } |
| switch (type) { |
| case TCG_TYPE_I32: |
| case TCG_TYPE_I64: |
| /* |
| * Conventional register-register move used in LoongArch is |
| * `or dst, src, zero`. |
| */ |
| tcg_out_opc_or(s, ret, arg, TCG_REG_ZERO); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| return true; |
| } |
| |
| static bool imm_part_needs_loading(bool high_bits_are_ones, |
| tcg_target_long part) |
| { |
| if (high_bits_are_ones) { |
| return part != -1; |
| } else { |
| return part != 0; |
| } |
| } |
| |
| /* Loads a 32-bit immediate into rd, sign-extended. */ |
| static void tcg_out_movi_i32(TCGContext *s, TCGReg rd, int32_t val) |
| { |
| tcg_target_long lo = sextreg(val, 0, 12); |
| tcg_target_long hi12 = sextreg(val, 12, 20); |
| |
| /* Single-instruction cases. */ |
| if (lo == val) { |
| /* val fits in simm12: addi.w rd, zero, val */ |
| tcg_out_opc_addi_w(s, rd, TCG_REG_ZERO, val); |
| return; |
| } |
| if (0x800 <= val && val <= 0xfff) { |
| /* val fits in uimm12: ori rd, zero, val */ |
| tcg_out_opc_ori(s, rd, TCG_REG_ZERO, val); |
| return; |
| } |
| |
| /* High bits must be set; load with lu12i.w + optional ori. */ |
| tcg_out_opc_lu12i_w(s, rd, hi12); |
| if (lo != 0) { |
| tcg_out_opc_ori(s, rd, rd, lo & 0xfff); |
| } |
| } |
| |
| static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd, |
| tcg_target_long val) |
| { |
| /* |
| * LoongArch conventionally loads 64-bit immediates in at most 4 steps, |
| * with dedicated instructions for filling the respective bitfields |
| * below: |
| * |
| * 6 5 4 3 |
| * 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 |
| * +-----------------------+---------------------------------------+... |
| * | hi52 | hi32 | |
| * +-----------------------+---------------------------------------+... |
| * 3 2 1 |
| * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 |
| * ...+-------------------------------------+-------------------------+ |
| * | hi12 | lo | |
| * ...+-------------------------------------+-------------------------+ |
| * |
| * Check if val belong to one of the several fast cases, before falling |
| * back to the slow path. |
| */ |
| |
| intptr_t pc_offset; |
| tcg_target_long val_lo, val_hi, pc_hi, offset_hi; |
| tcg_target_long hi32, hi52; |
| bool rd_high_bits_are_ones; |
| |
| /* Value fits in signed i32. */ |
| if (type == TCG_TYPE_I32 || val == (int32_t)val) { |
| tcg_out_movi_i32(s, rd, val); |
| return; |
| } |
| |
| /* PC-relative cases. */ |
| pc_offset = tcg_pcrel_diff(s, (void *)val); |
| if (pc_offset == sextreg(pc_offset, 0, 22) && (pc_offset & 3) == 0) { |
| /* Single pcaddu2i. */ |
| tcg_out_opc_pcaddu2i(s, rd, pc_offset >> 2); |
| return; |
| } |
| |
| if (pc_offset == (int32_t)pc_offset) { |
| /* Offset within 32 bits; load with pcalau12i + ori. */ |
| val_lo = sextreg(val, 0, 12); |
| val_hi = val >> 12; |
| pc_hi = (val - pc_offset) >> 12; |
| offset_hi = val_hi - pc_hi; |
| |
| tcg_debug_assert(offset_hi == sextreg(offset_hi, 0, 20)); |
| tcg_out_opc_pcalau12i(s, rd, offset_hi); |
| if (val_lo != 0) { |
| tcg_out_opc_ori(s, rd, rd, val_lo & 0xfff); |
| } |
| return; |
| } |
| |
| hi32 = sextreg(val, 32, 20); |
| hi52 = sextreg(val, 52, 12); |
| |
| /* Single cu52i.d case. */ |
| if (ctz64(val) >= 52) { |
| tcg_out_opc_cu52i_d(s, rd, TCG_REG_ZERO, hi52); |
| return; |
| } |
| |
| /* Slow path. Initialize the low 32 bits, then concat high bits. */ |
| tcg_out_movi_i32(s, rd, val); |
| rd_high_bits_are_ones = (int32_t)val < 0; |
| |
| if (imm_part_needs_loading(rd_high_bits_are_ones, hi32)) { |
| tcg_out_opc_cu32i_d(s, rd, hi32); |
| rd_high_bits_are_ones = hi32 < 0; |
| } |
| |
| if (imm_part_needs_loading(rd_high_bits_are_ones, hi52)) { |
| tcg_out_opc_cu52i_d(s, rd, rd, hi52); |
| } |
| } |
| |
| static void tcg_out_ext8u(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_andi(s, ret, arg, 0xff); |
| } |
| |
| static void tcg_out_ext16u(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_bstrpick_w(s, ret, arg, 0, 15); |
| } |
| |
| static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_bstrpick_d(s, ret, arg, 0, 31); |
| } |
| |
| static void tcg_out_ext8s(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_sext_b(s, ret, arg); |
| } |
| |
| static void tcg_out_ext16s(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_sext_h(s, ret, arg); |
| } |
| |
| static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_addi_w(s, ret, arg, 0); |
| } |
| |
| static void tcg_out_clzctz(TCGContext *s, LoongArchInsn opc, |
| TCGReg a0, TCGReg a1, TCGReg a2, |
| bool c2, bool is_32bit) |
| { |
| if (c2) { |
| /* |
| * Fast path: semantics already satisfied due to constraint and |
| * insn behavior, single instruction is enough. |
| */ |
| tcg_debug_assert(a2 == (is_32bit ? 32 : 64)); |
| /* all clz/ctz insns belong to DJ-format */ |
| tcg_out32(s, encode_dj_insn(opc, a0, a1)); |
| return; |
| } |
| |
| tcg_out32(s, encode_dj_insn(opc, TCG_REG_TMP0, a1)); |
| /* a0 = a1 ? REG_TMP0 : a2 */ |
| tcg_out_opc_maskeqz(s, TCG_REG_TMP0, TCG_REG_TMP0, a1); |
| tcg_out_opc_masknez(s, a0, a2, a1); |
| tcg_out_opc_or(s, a0, TCG_REG_TMP0, a0); |
| } |
| |
| static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, |
| TCGReg arg1, TCGReg arg2, bool c2) |
| { |
| TCGReg tmp; |
| |
| if (c2) { |
| tcg_debug_assert(arg2 == 0); |
| } |
| |
| switch (cond) { |
| case TCG_COND_EQ: |
| if (c2) { |
| tmp = arg1; |
| } else { |
| tcg_out_opc_sub_d(s, ret, arg1, arg2); |
| tmp = ret; |
| } |
| tcg_out_opc_sltui(s, ret, tmp, 1); |
| break; |
| case TCG_COND_NE: |
| if (c2) { |
| tmp = arg1; |
| } else { |
| tcg_out_opc_sub_d(s, ret, arg1, arg2); |
| tmp = ret; |
| } |
| tcg_out_opc_sltu(s, ret, TCG_REG_ZERO, tmp); |
| break; |
| case TCG_COND_LT: |
| tcg_out_opc_slt(s, ret, arg1, arg2); |
| break; |
| case TCG_COND_GE: |
| tcg_out_opc_slt(s, ret, arg1, arg2); |
| tcg_out_opc_xori(s, ret, ret, 1); |
| break; |
| case TCG_COND_LE: |
| tcg_out_setcond(s, TCG_COND_GE, ret, arg2, arg1, false); |
| break; |
| case TCG_COND_GT: |
| tcg_out_setcond(s, TCG_COND_LT, ret, arg2, arg1, false); |
| break; |
| case TCG_COND_LTU: |
| tcg_out_opc_sltu(s, ret, arg1, arg2); |
| break; |
| case TCG_COND_GEU: |
| tcg_out_opc_sltu(s, ret, arg1, arg2); |
| tcg_out_opc_xori(s, ret, ret, 1); |
| break; |
| case TCG_COND_LEU: |
| tcg_out_setcond(s, TCG_COND_GEU, ret, arg2, arg1, false); |
| break; |
| case TCG_COND_GTU: |
| tcg_out_setcond(s, TCG_COND_LTU, ret, arg2, arg1, false); |
| break; |
| default: |
| g_assert_not_reached(); |
| break; |
| } |
| } |
| |
| /* |
| * Branch helpers |
| */ |
| |
| static const struct { |
| LoongArchInsn op; |
| bool swap; |
| } tcg_brcond_to_loongarch[] = { |
| [TCG_COND_EQ] = { OPC_BEQ, false }, |
| [TCG_COND_NE] = { OPC_BNE, false }, |
| [TCG_COND_LT] = { OPC_BGT, true }, |
| [TCG_COND_GE] = { OPC_BLE, true }, |
| [TCG_COND_LE] = { OPC_BLE, false }, |
| [TCG_COND_GT] = { OPC_BGT, false }, |
| [TCG_COND_LTU] = { OPC_BGTU, true }, |
| [TCG_COND_GEU] = { OPC_BLEU, true }, |
| [TCG_COND_LEU] = { OPC_BLEU, false }, |
| [TCG_COND_GTU] = { OPC_BGTU, false } |
| }; |
| |
| static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1, |
| TCGReg arg2, TCGLabel *l) |
| { |
| LoongArchInsn op = tcg_brcond_to_loongarch[cond].op; |
| |
| tcg_debug_assert(op != 0); |
| |
| if (tcg_brcond_to_loongarch[cond].swap) { |
| TCGReg t = arg1; |
| arg1 = arg2; |
| arg2 = t; |
| } |
| |
| /* all conditional branch insns belong to DJSk16-format */ |
| tcg_out_reloc(s, s->code_ptr, R_LOONGARCH_BR_SK16, l, 0); |
| tcg_out32(s, encode_djsk16_insn(op, arg1, arg2, 0)); |
| } |
| |
| static void tcg_out_call_int(TCGContext *s, const tcg_insn_unit *arg, bool tail) |
| { |
| TCGReg link = tail ? TCG_REG_ZERO : TCG_REG_RA; |
| ptrdiff_t offset = tcg_pcrel_diff(s, arg); |
| |
| tcg_debug_assert((offset & 3) == 0); |
| if (offset == sextreg(offset, 0, 28)) { |
| /* short jump: +/- 256MiB */ |
| if (tail) { |
| tcg_out_opc_b(s, offset >> 2); |
| } else { |
| tcg_out_opc_bl(s, offset >> 2); |
| } |
| } else if (offset == sextreg(offset, 0, 38)) { |
| /* long jump: +/- 256GiB */ |
| tcg_target_long lo = sextreg(offset, 0, 18); |
| tcg_target_long hi = offset - lo; |
| tcg_out_opc_pcaddu18i(s, TCG_REG_TMP0, hi >> 18); |
| tcg_out_opc_jirl(s, link, TCG_REG_TMP0, lo >> 2); |
| } else { |
| /* far jump: 64-bit */ |
| tcg_target_long lo = sextreg((tcg_target_long)arg, 0, 18); |
| tcg_target_long hi = (tcg_target_long)arg - lo; |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP0, hi); |
| tcg_out_opc_jirl(s, link, TCG_REG_TMP0, lo >> 2); |
| } |
| } |
| |
| static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg, |
| const TCGHelperInfo *info) |
| { |
| tcg_out_call_int(s, arg, false); |
| } |
| |
| /* |
| * Load/store helpers |
| */ |
| |
| static void tcg_out_ldst(TCGContext *s, LoongArchInsn opc, TCGReg data, |
| TCGReg addr, intptr_t offset) |
| { |
| intptr_t imm12 = sextreg(offset, 0, 12); |
| |
| if (offset != imm12) { |
| intptr_t diff = offset - (uintptr_t)s->code_ptr; |
| |
| if (addr == TCG_REG_ZERO && diff == (int32_t)diff) { |
| imm12 = sextreg(diff, 0, 12); |
| tcg_out_opc_pcaddu12i(s, TCG_REG_TMP2, (diff - imm12) >> 12); |
| } else { |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP2, offset - imm12); |
| if (addr != TCG_REG_ZERO) { |
| tcg_out_opc_add_d(s, TCG_REG_TMP2, TCG_REG_TMP2, addr); |
| } |
| } |
| addr = TCG_REG_TMP2; |
| } |
| |
| switch (opc) { |
| case OPC_LD_B: |
| case OPC_LD_BU: |
| case OPC_LD_H: |
| case OPC_LD_HU: |
| case OPC_LD_W: |
| case OPC_LD_WU: |
| case OPC_LD_D: |
| case OPC_ST_B: |
| case OPC_ST_H: |
| case OPC_ST_W: |
| case OPC_ST_D: |
| tcg_out32(s, encode_djsk12_insn(opc, data, addr, imm12)); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, |
| TCGReg arg1, intptr_t arg2) |
| { |
| bool is_32bit = type == TCG_TYPE_I32; |
| tcg_out_ldst(s, is_32bit ? OPC_LD_W : OPC_LD_D, arg, arg1, arg2); |
| } |
| |
| static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, |
| TCGReg arg1, intptr_t arg2) |
| { |
| bool is_32bit = type == TCG_TYPE_I32; |
| tcg_out_ldst(s, is_32bit ? OPC_ST_W : OPC_ST_D, arg, arg1, arg2); |
| } |
| |
| static bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, |
| TCGReg base, intptr_t ofs) |
| { |
| if (val == 0) { |
| tcg_out_st(s, type, TCG_REG_ZERO, base, ofs); |
| return true; |
| } |
| return false; |
| } |
| |
| /* |
| * Load/store helpers for SoftMMU, and qemu_ld/st implementations |
| */ |
| |
| #if defined(CONFIG_SOFTMMU) |
| /* |
| * helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr, |
| * MemOpIdx oi, uintptr_t ra) |
| */ |
| static void * const qemu_ld_helpers[4] = { |
| [MO_8] = helper_ret_ldub_mmu, |
| [MO_16] = helper_le_lduw_mmu, |
| [MO_32] = helper_le_ldul_mmu, |
| [MO_64] = helper_le_ldq_mmu, |
| }; |
| |
| /* |
| * helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr, |
| * uintxx_t val, MemOpIdx oi, |
| * uintptr_t ra) |
| */ |
| static void * const qemu_st_helpers[4] = { |
| [MO_8] = helper_ret_stb_mmu, |
| [MO_16] = helper_le_stw_mmu, |
| [MO_32] = helper_le_stl_mmu, |
| [MO_64] = helper_le_stq_mmu, |
| }; |
| |
| /* We expect to use a 12-bit negative offset from ENV. */ |
| QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0); |
| QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -(1 << 11)); |
| |
| static bool tcg_out_goto(TCGContext *s, const tcg_insn_unit *target) |
| { |
| tcg_out_opc_b(s, 0); |
| return reloc_br_sd10k16(s->code_ptr - 1, target); |
| } |
| |
| /* |
| * Emits common code for TLB addend lookup, that eventually loads the |
| * addend in TCG_REG_TMP2. |
| */ |
| static void tcg_out_tlb_load(TCGContext *s, TCGReg addrl, MemOpIdx oi, |
| tcg_insn_unit **label_ptr, bool is_load) |
| { |
| MemOp opc = get_memop(oi); |
| unsigned s_bits = opc & MO_SIZE; |
| unsigned a_bits = get_alignment_bits(opc); |
| tcg_target_long compare_mask; |
| int mem_index = get_mmuidx(oi); |
| int fast_ofs = TLB_MASK_TABLE_OFS(mem_index); |
| int mask_ofs = fast_ofs + offsetof(CPUTLBDescFast, mask); |
| int table_ofs = fast_ofs + offsetof(CPUTLBDescFast, table); |
| |
| tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_AREG0, mask_ofs); |
| tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, TCG_AREG0, table_ofs); |
| |
| tcg_out_opc_srli_d(s, TCG_REG_TMP2, addrl, |
| TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); |
| tcg_out_opc_and(s, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP0); |
| tcg_out_opc_add_d(s, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP1); |
| |
| /* Load the tlb comparator and the addend. */ |
| tcg_out_ld(s, TCG_TYPE_TL, TCG_REG_TMP0, TCG_REG_TMP2, |
| is_load ? offsetof(CPUTLBEntry, addr_read) |
| : offsetof(CPUTLBEntry, addr_write)); |
| tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP2, TCG_REG_TMP2, |
| offsetof(CPUTLBEntry, addend)); |
| |
| /* We don't support unaligned accesses. */ |
| if (a_bits < s_bits) { |
| a_bits = s_bits; |
| } |
| /* Clear the non-page, non-alignment bits from the address. */ |
| compare_mask = (tcg_target_long)TARGET_PAGE_MASK | ((1 << a_bits) - 1); |
| tcg_out_movi(s, TCG_TYPE_TL, TCG_REG_TMP1, compare_mask); |
| tcg_out_opc_and(s, TCG_REG_TMP1, TCG_REG_TMP1, addrl); |
| |
| /* Compare masked address with the TLB entry. */ |
| label_ptr[0] = s->code_ptr; |
| tcg_out_opc_bne(s, TCG_REG_TMP0, TCG_REG_TMP1, 0); |
| |
| /* TLB Hit - addend in TCG_REG_TMP2, ready for use. */ |
| } |
| |
| static void add_qemu_ldst_label(TCGContext *s, int is_ld, MemOpIdx oi, |
| TCGType type, |
| TCGReg datalo, TCGReg addrlo, |
| void *raddr, tcg_insn_unit **label_ptr) |
| { |
| TCGLabelQemuLdst *label = new_ldst_label(s); |
| |
| label->is_ld = is_ld; |
| label->oi = oi; |
| label->type = type; |
| label->datalo_reg = datalo; |
| label->datahi_reg = 0; /* unused */ |
| label->addrlo_reg = addrlo; |
| label->addrhi_reg = 0; /* unused */ |
| label->raddr = tcg_splitwx_to_rx(raddr); |
| label->label_ptr[0] = label_ptr[0]; |
| } |
| |
| static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) |
| { |
| MemOpIdx oi = l->oi; |
| MemOp opc = get_memop(oi); |
| MemOp size = opc & MO_SIZE; |
| TCGType type = l->type; |
| |
| /* resolve label address */ |
| if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { |
| return false; |
| } |
| |
| /* call load helper */ |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0); |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A1, l->addrlo_reg); |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A2, oi); |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A3, (tcg_target_long)l->raddr); |
| |
| tcg_out_call_int(s, qemu_ld_helpers[size], false); |
| |
| switch (opc & MO_SSIZE) { |
| case MO_SB: |
| tcg_out_ext8s(s, l->datalo_reg, TCG_REG_A0); |
| break; |
| case MO_SW: |
| tcg_out_ext16s(s, l->datalo_reg, TCG_REG_A0); |
| break; |
| case MO_SL: |
| tcg_out_ext32s(s, l->datalo_reg, TCG_REG_A0); |
| break; |
| case MO_UL: |
| if (type == TCG_TYPE_I32) { |
| /* MO_UL loads of i32 should be sign-extended too */ |
| tcg_out_ext32s(s, l->datalo_reg, TCG_REG_A0); |
| break; |
| } |
| /* fallthrough */ |
| default: |
| tcg_out_mov(s, type, l->datalo_reg, TCG_REG_A0); |
| break; |
| } |
| |
| return tcg_out_goto(s, l->raddr); |
| } |
| |
| static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) |
| { |
| MemOpIdx oi = l->oi; |
| MemOp opc = get_memop(oi); |
| MemOp size = opc & MO_SIZE; |
| |
| /* resolve label address */ |
| if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { |
| return false; |
| } |
| |
| /* call store helper */ |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0); |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A1, l->addrlo_reg); |
| switch (size) { |
| case MO_8: |
| tcg_out_ext8u(s, TCG_REG_A2, l->datalo_reg); |
| break; |
| case MO_16: |
| tcg_out_ext16u(s, TCG_REG_A2, l->datalo_reg); |
| break; |
| case MO_32: |
| tcg_out_ext32u(s, TCG_REG_A2, l->datalo_reg); |
| break; |
| case MO_64: |
| tcg_out_mov(s, TCG_TYPE_I64, TCG_REG_A2, l->datalo_reg); |
| break; |
| default: |
| g_assert_not_reached(); |
| break; |
| } |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A3, oi); |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A4, (tcg_target_long)l->raddr); |
| |
| tcg_out_call_int(s, qemu_st_helpers[size], false); |
| |
| return tcg_out_goto(s, l->raddr); |
| } |
| #else |
| |
| /* |
| * Alignment helpers for user-mode emulation |
| */ |
| |
| static void tcg_out_test_alignment(TCGContext *s, bool is_ld, TCGReg addr_reg, |
| unsigned a_bits) |
| { |
| TCGLabelQemuLdst *l = new_ldst_label(s); |
| |
| l->is_ld = is_ld; |
| l->addrlo_reg = addr_reg; |
| |
| /* |
| * Without micro-architecture details, we don't know which of bstrpick or |
| * andi is faster, so use bstrpick as it's not constrained by imm field |
| * width. (Not to say alignments >= 2^12 are going to happen any time |
| * soon, though) |
| */ |
| tcg_out_opc_bstrpick_d(s, TCG_REG_TMP1, addr_reg, 0, a_bits - 1); |
| |
| l->label_ptr[0] = s->code_ptr; |
| tcg_out_opc_bne(s, TCG_REG_TMP1, TCG_REG_ZERO, 0); |
| |
| l->raddr = tcg_splitwx_to_rx(s->code_ptr); |
| } |
| |
| static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l) |
| { |
| /* resolve label address */ |
| if (!reloc_br_sk16(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { |
| return false; |
| } |
| |
| tcg_out_mov(s, TCG_TYPE_TL, TCG_REG_A1, l->addrlo_reg); |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_REG_A0, TCG_AREG0); |
| |
| /* tail call, with the return address back inline. */ |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RA, (uintptr_t)l->raddr); |
| tcg_out_call_int(s, (const void *)(l->is_ld ? helper_unaligned_ld |
| : helper_unaligned_st), true); |
| return true; |
| } |
| |
| static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l) |
| { |
| return tcg_out_fail_alignment(s, l); |
| } |
| |
| static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) |
| { |
| return tcg_out_fail_alignment(s, l); |
| } |
| |
| #endif /* CONFIG_SOFTMMU */ |
| |
| /* |
| * `ext32u` the address register into the temp register given, |
| * if target is 32-bit, no-op otherwise. |
| * |
| * Returns the address register ready for use with TLB addend. |
| */ |
| static TCGReg tcg_out_zext_addr_if_32_bit(TCGContext *s, |
| TCGReg addr, TCGReg tmp) |
| { |
| if (TARGET_LONG_BITS == 32) { |
| tcg_out_ext32u(s, tmp, addr); |
| return tmp; |
| } |
| return addr; |
| } |
| |
| static void tcg_out_qemu_ld_indexed(TCGContext *s, TCGReg rd, TCGReg rj, |
| TCGReg rk, MemOp opc, TCGType type) |
| { |
| /* Byte swapping is left to middle-end expansion. */ |
| tcg_debug_assert((opc & MO_BSWAP) == 0); |
| |
| switch (opc & MO_SSIZE) { |
| case MO_UB: |
| tcg_out_opc_ldx_bu(s, rd, rj, rk); |
| break; |
| case MO_SB: |
| tcg_out_opc_ldx_b(s, rd, rj, rk); |
| break; |
| case MO_UW: |
| tcg_out_opc_ldx_hu(s, rd, rj, rk); |
| break; |
| case MO_SW: |
| tcg_out_opc_ldx_h(s, rd, rj, rk); |
| break; |
| case MO_UL: |
| if (type == TCG_TYPE_I64) { |
| tcg_out_opc_ldx_wu(s, rd, rj, rk); |
| break; |
| } |
| /* fallthrough */ |
| case MO_SL: |
| tcg_out_opc_ldx_w(s, rd, rj, rk); |
| break; |
| case MO_UQ: |
| tcg_out_opc_ldx_d(s, rd, rj, rk); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, TCGType type) |
| { |
| TCGReg addr_regl; |
| TCGReg data_regl; |
| MemOpIdx oi; |
| MemOp opc; |
| #if defined(CONFIG_SOFTMMU) |
| tcg_insn_unit *label_ptr[1]; |
| #else |
| unsigned a_bits; |
| #endif |
| TCGReg base; |
| |
| data_regl = *args++; |
| addr_regl = *args++; |
| oi = *args++; |
| opc = get_memop(oi); |
| |
| #if defined(CONFIG_SOFTMMU) |
| tcg_out_tlb_load(s, addr_regl, oi, label_ptr, 1); |
| base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); |
| tcg_out_qemu_ld_indexed(s, data_regl, base, TCG_REG_TMP2, opc, type); |
| add_qemu_ldst_label(s, 1, oi, type, |
| data_regl, addr_regl, |
| s->code_ptr, label_ptr); |
| #else |
| a_bits = get_alignment_bits(opc); |
| if (a_bits) { |
| tcg_out_test_alignment(s, true, addr_regl, a_bits); |
| } |
| base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); |
| TCGReg guest_base_reg = USE_GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_ZERO; |
| tcg_out_qemu_ld_indexed(s, data_regl, base, guest_base_reg, opc, type); |
| #endif |
| } |
| |
| static void tcg_out_qemu_st_indexed(TCGContext *s, TCGReg data, |
| TCGReg rj, TCGReg rk, MemOp opc) |
| { |
| /* Byte swapping is left to middle-end expansion. */ |
| tcg_debug_assert((opc & MO_BSWAP) == 0); |
| |
| switch (opc & MO_SIZE) { |
| case MO_8: |
| tcg_out_opc_stx_b(s, data, rj, rk); |
| break; |
| case MO_16: |
| tcg_out_opc_stx_h(s, data, rj, rk); |
| break; |
| case MO_32: |
| tcg_out_opc_stx_w(s, data, rj, rk); |
| break; |
| case MO_64: |
| tcg_out_opc_stx_d(s, data, rj, rk); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args) |
| { |
| TCGReg addr_regl; |
| TCGReg data_regl; |
| MemOpIdx oi; |
| MemOp opc; |
| #if defined(CONFIG_SOFTMMU) |
| tcg_insn_unit *label_ptr[1]; |
| #else |
| unsigned a_bits; |
| #endif |
| TCGReg base; |
| |
| data_regl = *args++; |
| addr_regl = *args++; |
| oi = *args++; |
| opc = get_memop(oi); |
| |
| #if defined(CONFIG_SOFTMMU) |
| tcg_out_tlb_load(s, addr_regl, oi, label_ptr, 0); |
| base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); |
| tcg_out_qemu_st_indexed(s, data_regl, base, TCG_REG_TMP2, opc); |
| add_qemu_ldst_label(s, 0, oi, |
| 0, /* type param is unused for stores */ |
| data_regl, addr_regl, |
| s->code_ptr, label_ptr); |
| #else |
| a_bits = get_alignment_bits(opc); |
| if (a_bits) { |
| tcg_out_test_alignment(s, false, addr_regl, a_bits); |
| } |
| base = tcg_out_zext_addr_if_32_bit(s, addr_regl, TCG_REG_TMP0); |
| TCGReg guest_base_reg = USE_GUEST_BASE ? TCG_GUEST_BASE_REG : TCG_REG_ZERO; |
| tcg_out_qemu_st_indexed(s, data_regl, base, guest_base_reg, opc); |
| #endif |
| } |
| |
| /* LoongArch uses `andi zero, zero, 0` as NOP. */ |
| #define NOP OPC_ANDI |
| static void tcg_out_nop(TCGContext *s) |
| { |
| tcg_out32(s, NOP); |
| } |
| |
| void tb_target_set_jmp_target(uintptr_t tc_ptr, uintptr_t jmp_rx, |
| uintptr_t jmp_rw, uintptr_t addr) |
| { |
| tcg_insn_unit i1, i2; |
| ptrdiff_t upper, lower; |
| ptrdiff_t offset = (ptrdiff_t)(addr - jmp_rx) >> 2; |
| |
| if (offset == sextreg(offset, 0, 26)) { |
| i1 = encode_sd10k16_insn(OPC_B, offset); |
| i2 = NOP; |
| } else { |
| tcg_debug_assert(offset == sextreg(offset, 0, 36)); |
| lower = (int16_t)offset; |
| upper = (offset - lower) >> 16; |
| |
| i1 = encode_dsj20_insn(OPC_PCADDU18I, TCG_REG_TMP0, upper); |
| i2 = encode_djsk16_insn(OPC_JIRL, TCG_REG_ZERO, TCG_REG_TMP0, lower); |
| } |
| uint64_t pair = ((uint64_t)i2 << 32) | i1; |
| qatomic_set((uint64_t *)jmp_rw, pair); |
| flush_idcache_range(jmp_rx, jmp_rw, 8); |
| } |
| |
| /* |
| * Entry-points |
| */ |
| |
| static const tcg_insn_unit *tb_ret_addr; |
| |
| static void tcg_out_op(TCGContext *s, TCGOpcode opc, |
| const TCGArg args[TCG_MAX_OP_ARGS], |
| const int const_args[TCG_MAX_OP_ARGS]) |
| { |
| TCGArg a0 = args[0]; |
| TCGArg a1 = args[1]; |
| TCGArg a2 = args[2]; |
| int c2 = const_args[2]; |
| |
| switch (opc) { |
| case INDEX_op_exit_tb: |
| /* Reuse the zeroing that exists for goto_ptr. */ |
| if (a0 == 0) { |
| tcg_out_call_int(s, tcg_code_gen_epilogue, true); |
| } else { |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_A0, a0); |
| tcg_out_call_int(s, tb_ret_addr, true); |
| } |
| break; |
| |
| case INDEX_op_goto_tb: |
| tcg_debug_assert(s->tb_jmp_insn_offset != NULL); |
| /* |
| * Ensure that patch area is 8-byte aligned so that an |
| * atomic write can be used to patch the target address. |
| */ |
| if ((uintptr_t)s->code_ptr & 7) { |
| tcg_out_nop(s); |
| } |
| s->tb_jmp_insn_offset[a0] = tcg_current_code_size(s); |
| /* |
| * actual branch destination will be patched by |
| * tb_target_set_jmp_target later |
| */ |
| tcg_out_opc_pcaddu18i(s, TCG_REG_TMP0, 0); |
| tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_TMP0, 0); |
| set_jmp_reset_offset(s, a0); |
| break; |
| |
| case INDEX_op_mb: |
| tcg_out_mb(s, a0); |
| break; |
| |
| case INDEX_op_goto_ptr: |
| tcg_out_opc_jirl(s, TCG_REG_ZERO, a0, 0); |
| break; |
| |
| case INDEX_op_br: |
| tcg_out_reloc(s, s->code_ptr, R_LOONGARCH_BR_SD10K16, arg_label(a0), |
| 0); |
| tcg_out_opc_b(s, 0); |
| break; |
| |
| case INDEX_op_brcond_i32: |
| case INDEX_op_brcond_i64: |
| tcg_out_brcond(s, a2, a0, a1, arg_label(args[3])); |
| break; |
| |
| case INDEX_op_ext8s_i32: |
| case INDEX_op_ext8s_i64: |
| tcg_out_ext8s(s, a0, a1); |
| break; |
| |
| case INDEX_op_ext8u_i32: |
| case INDEX_op_ext8u_i64: |
| tcg_out_ext8u(s, a0, a1); |
| break; |
| |
| case INDEX_op_ext16s_i32: |
| case INDEX_op_ext16s_i64: |
| tcg_out_ext16s(s, a0, a1); |
| break; |
| |
| case INDEX_op_ext16u_i32: |
| case INDEX_op_ext16u_i64: |
| tcg_out_ext16u(s, a0, a1); |
| break; |
| |
| case INDEX_op_ext32u_i64: |
| case INDEX_op_extu_i32_i64: |
| tcg_out_ext32u(s, a0, a1); |
| break; |
| |
| case INDEX_op_ext32s_i64: |
| case INDEX_op_extrl_i64_i32: |
| case INDEX_op_ext_i32_i64: |
| tcg_out_ext32s(s, a0, a1); |
| break; |
| |
| case INDEX_op_extrh_i64_i32: |
| tcg_out_opc_srai_d(s, a0, a1, 32); |
| break; |
| |
| case INDEX_op_not_i32: |
| case INDEX_op_not_i64: |
| tcg_out_opc_nor(s, a0, a1, TCG_REG_ZERO); |
| break; |
| |
| case INDEX_op_nor_i32: |
| case INDEX_op_nor_i64: |
| if (c2) { |
| tcg_out_opc_ori(s, a0, a1, a2); |
| tcg_out_opc_nor(s, a0, a0, TCG_REG_ZERO); |
| } else { |
| tcg_out_opc_nor(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_andc_i32: |
| case INDEX_op_andc_i64: |
| if (c2) { |
| /* guaranteed to fit due to constraint */ |
| tcg_out_opc_andi(s, a0, a1, ~a2); |
| } else { |
| tcg_out_opc_andn(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_orc_i32: |
| case INDEX_op_orc_i64: |
| if (c2) { |
| /* guaranteed to fit due to constraint */ |
| tcg_out_opc_ori(s, a0, a1, ~a2); |
| } else { |
| tcg_out_opc_orn(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_and_i32: |
| case INDEX_op_and_i64: |
| if (c2) { |
| tcg_out_opc_andi(s, a0, a1, a2); |
| } else { |
| tcg_out_opc_and(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_or_i32: |
| case INDEX_op_or_i64: |
| if (c2) { |
| tcg_out_opc_ori(s, a0, a1, a2); |
| } else { |
| tcg_out_opc_or(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_xor_i32: |
| case INDEX_op_xor_i64: |
| if (c2) { |
| tcg_out_opc_xori(s, a0, a1, a2); |
| } else { |
| tcg_out_opc_xor(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_extract_i32: |
| tcg_out_opc_bstrpick_w(s, a0, a1, a2, a2 + args[3] - 1); |
| break; |
| case INDEX_op_extract_i64: |
| tcg_out_opc_bstrpick_d(s, a0, a1, a2, a2 + args[3] - 1); |
| break; |
| |
| case INDEX_op_deposit_i32: |
| tcg_out_opc_bstrins_w(s, a0, a2, args[3], args[3] + args[4] - 1); |
| break; |
| case INDEX_op_deposit_i64: |
| tcg_out_opc_bstrins_d(s, a0, a2, args[3], args[3] + args[4] - 1); |
| break; |
| |
| case INDEX_op_bswap16_i32: |
| case INDEX_op_bswap16_i64: |
| tcg_out_opc_revb_2h(s, a0, a1); |
| if (a2 & TCG_BSWAP_OS) { |
| tcg_out_ext16s(s, a0, a0); |
| } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { |
| tcg_out_ext16u(s, a0, a0); |
| } |
| break; |
| |
| case INDEX_op_bswap32_i32: |
| /* All 32-bit values are computed sign-extended in the register. */ |
| a2 = TCG_BSWAP_OS; |
| /* fallthrough */ |
| case INDEX_op_bswap32_i64: |
| tcg_out_opc_revb_2w(s, a0, a1); |
| if (a2 & TCG_BSWAP_OS) { |
| tcg_out_ext32s(s, a0, a0); |
| } else if ((a2 & (TCG_BSWAP_IZ | TCG_BSWAP_OZ)) == TCG_BSWAP_OZ) { |
| tcg_out_ext32u(s, a0, a0); |
| } |
| break; |
| |
| case INDEX_op_bswap64_i64: |
| tcg_out_opc_revb_d(s, a0, a1); |
| break; |
| |
| case INDEX_op_clz_i32: |
| tcg_out_clzctz(s, OPC_CLZ_W, a0, a1, a2, c2, true); |
| break; |
| case INDEX_op_clz_i64: |
| tcg_out_clzctz(s, OPC_CLZ_D, a0, a1, a2, c2, false); |
| break; |
| |
| case INDEX_op_ctz_i32: |
| tcg_out_clzctz(s, OPC_CTZ_W, a0, a1, a2, c2, true); |
| break; |
| case INDEX_op_ctz_i64: |
| tcg_out_clzctz(s, OPC_CTZ_D, a0, a1, a2, c2, false); |
| break; |
| |
| case INDEX_op_shl_i32: |
| if (c2) { |
| tcg_out_opc_slli_w(s, a0, a1, a2 & 0x1f); |
| } else { |
| tcg_out_opc_sll_w(s, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_shl_i64: |
| if (c2) { |
| tcg_out_opc_slli_d(s, a0, a1, a2 & 0x3f); |
| } else { |
| tcg_out_opc_sll_d(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_shr_i32: |
| if (c2) { |
| tcg_out_opc_srli_w(s, a0, a1, a2 & 0x1f); |
| } else { |
| tcg_out_opc_srl_w(s, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_shr_i64: |
| if (c2) { |
| tcg_out_opc_srli_d(s, a0, a1, a2 & 0x3f); |
| } else { |
| tcg_out_opc_srl_d(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_sar_i32: |
| if (c2) { |
| tcg_out_opc_srai_w(s, a0, a1, a2 & 0x1f); |
| } else { |
| tcg_out_opc_sra_w(s, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_sar_i64: |
| if (c2) { |
| tcg_out_opc_srai_d(s, a0, a1, a2 & 0x3f); |
| } else { |
| tcg_out_opc_sra_d(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_rotl_i32: |
| /* transform into equivalent rotr/rotri */ |
| if (c2) { |
| tcg_out_opc_rotri_w(s, a0, a1, (32 - a2) & 0x1f); |
| } else { |
| tcg_out_opc_sub_w(s, TCG_REG_TMP0, TCG_REG_ZERO, a2); |
| tcg_out_opc_rotr_w(s, a0, a1, TCG_REG_TMP0); |
| } |
| break; |
| case INDEX_op_rotl_i64: |
| /* transform into equivalent rotr/rotri */ |
| if (c2) { |
| tcg_out_opc_rotri_d(s, a0, a1, (64 - a2) & 0x3f); |
| } else { |
| tcg_out_opc_sub_w(s, TCG_REG_TMP0, TCG_REG_ZERO, a2); |
| tcg_out_opc_rotr_d(s, a0, a1, TCG_REG_TMP0); |
| } |
| break; |
| |
| case INDEX_op_rotr_i32: |
| if (c2) { |
| tcg_out_opc_rotri_w(s, a0, a1, a2 & 0x1f); |
| } else { |
| tcg_out_opc_rotr_w(s, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_rotr_i64: |
| if (c2) { |
| tcg_out_opc_rotri_d(s, a0, a1, a2 & 0x3f); |
| } else { |
| tcg_out_opc_rotr_d(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_add_i32: |
| if (c2) { |
| tcg_out_opc_addi_w(s, a0, a1, a2); |
| } else { |
| tcg_out_opc_add_w(s, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_add_i64: |
| if (c2) { |
| tcg_out_opc_addi_d(s, a0, a1, a2); |
| } else { |
| tcg_out_opc_add_d(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_sub_i32: |
| if (c2) { |
| tcg_out_opc_addi_w(s, a0, a1, -a2); |
| } else { |
| tcg_out_opc_sub_w(s, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_sub_i64: |
| if (c2) { |
| tcg_out_opc_addi_d(s, a0, a1, -a2); |
| } else { |
| tcg_out_opc_sub_d(s, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_mul_i32: |
| tcg_out_opc_mul_w(s, a0, a1, a2); |
| break; |
| case INDEX_op_mul_i64: |
| tcg_out_opc_mul_d(s, a0, a1, a2); |
| break; |
| |
| case INDEX_op_mulsh_i32: |
| tcg_out_opc_mulh_w(s, a0, a1, a2); |
| break; |
| case INDEX_op_mulsh_i64: |
| tcg_out_opc_mulh_d(s, a0, a1, a2); |
| break; |
| |
| case INDEX_op_muluh_i32: |
| tcg_out_opc_mulh_wu(s, a0, a1, a2); |
| break; |
| case INDEX_op_muluh_i64: |
| tcg_out_opc_mulh_du(s, a0, a1, a2); |
| break; |
| |
| case INDEX_op_div_i32: |
| tcg_out_opc_div_w(s, a0, a1, a2); |
| break; |
| case INDEX_op_div_i64: |
| tcg_out_opc_div_d(s, a0, a1, a2); |
| break; |
| |
| case INDEX_op_divu_i32: |
| tcg_out_opc_div_wu(s, a0, a1, a2); |
| break; |
| case INDEX_op_divu_i64: |
| tcg_out_opc_div_du(s, a0, a1, a2); |
| break; |
| |
| case INDEX_op_rem_i32: |
| tcg_out_opc_mod_w(s, a0, a1, a2); |
| break; |
| case INDEX_op_rem_i64: |
| tcg_out_opc_mod_d(s, a0, a1, a2); |
| break; |
| |
| case INDEX_op_remu_i32: |
| tcg_out_opc_mod_wu(s, a0, a1, a2); |
| break; |
| case INDEX_op_remu_i64: |
| tcg_out_opc_mod_du(s, a0, a1, a2); |
| break; |
| |
| case INDEX_op_setcond_i32: |
| case INDEX_op_setcond_i64: |
| tcg_out_setcond(s, args[3], a0, a1, a2, c2); |
| break; |
| |
| case INDEX_op_ld8s_i32: |
| case INDEX_op_ld8s_i64: |
| tcg_out_ldst(s, OPC_LD_B, a0, a1, a2); |
| break; |
| case INDEX_op_ld8u_i32: |
| case INDEX_op_ld8u_i64: |
| tcg_out_ldst(s, OPC_LD_BU, a0, a1, a2); |
| break; |
| case INDEX_op_ld16s_i32: |
| case INDEX_op_ld16s_i64: |
| tcg_out_ldst(s, OPC_LD_H, a0, a1, a2); |
| break; |
| case INDEX_op_ld16u_i32: |
| case INDEX_op_ld16u_i64: |
| tcg_out_ldst(s, OPC_LD_HU, a0, a1, a2); |
| break; |
| case INDEX_op_ld_i32: |
| case INDEX_op_ld32s_i64: |
| tcg_out_ldst(s, OPC_LD_W, a0, a1, a2); |
| break; |
| case INDEX_op_ld32u_i64: |
| tcg_out_ldst(s, OPC_LD_WU, a0, a1, a2); |
| break; |
| case INDEX_op_ld_i64: |
| tcg_out_ldst(s, OPC_LD_D, a0, a1, a2); |
| break; |
| |
| case INDEX_op_st8_i32: |
| case INDEX_op_st8_i64: |
| tcg_out_ldst(s, OPC_ST_B, a0, a1, a2); |
| break; |
| case INDEX_op_st16_i32: |
| case INDEX_op_st16_i64: |
| tcg_out_ldst(s, OPC_ST_H, a0, a1, a2); |
| break; |
| case INDEX_op_st_i32: |
| case INDEX_op_st32_i64: |
| tcg_out_ldst(s, OPC_ST_W, a0, a1, a2); |
| break; |
| case INDEX_op_st_i64: |
| tcg_out_ldst(s, OPC_ST_D, a0, a1, a2); |
| break; |
| |
| case INDEX_op_qemu_ld_i32: |
| tcg_out_qemu_ld(s, args, TCG_TYPE_I32); |
| break; |
| case INDEX_op_qemu_ld_i64: |
| tcg_out_qemu_ld(s, args, TCG_TYPE_I64); |
| break; |
| case INDEX_op_qemu_st_i32: |
| tcg_out_qemu_st(s, args); |
| break; |
| case INDEX_op_qemu_st_i64: |
| tcg_out_qemu_st(s, args); |
| break; |
| |
| case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ |
| case INDEX_op_mov_i64: |
| case INDEX_op_call: /* Always emitted via tcg_out_call. */ |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static TCGConstraintSetIndex tcg_target_op_def(TCGOpcode op) |
| { |
| switch (op) { |
| case INDEX_op_goto_ptr: |
| return C_O0_I1(r); |
| |
| case INDEX_op_st8_i32: |
| case INDEX_op_st8_i64: |
| case INDEX_op_st16_i32: |
| case INDEX_op_st16_i64: |
| case INDEX_op_st32_i64: |
| case INDEX_op_st_i32: |
| case INDEX_op_st_i64: |
| return C_O0_I2(rZ, r); |
| |
| case INDEX_op_brcond_i32: |
| case INDEX_op_brcond_i64: |
| return C_O0_I2(rZ, rZ); |
| |
| case INDEX_op_qemu_st_i32: |
| case INDEX_op_qemu_st_i64: |
| return C_O0_I2(LZ, L); |
| |
| case INDEX_op_ext8s_i32: |
| case INDEX_op_ext8s_i64: |
| case INDEX_op_ext8u_i32: |
| case INDEX_op_ext8u_i64: |
| case INDEX_op_ext16s_i32: |
| case INDEX_op_ext16s_i64: |
| case INDEX_op_ext16u_i32: |
| case INDEX_op_ext16u_i64: |
| case INDEX_op_ext32s_i64: |
| case INDEX_op_ext32u_i64: |
| case INDEX_op_extu_i32_i64: |
| case INDEX_op_extrl_i64_i32: |
| case INDEX_op_extrh_i64_i32: |
| case INDEX_op_ext_i32_i64: |
| case INDEX_op_not_i32: |
| case INDEX_op_not_i64: |
| case INDEX_op_extract_i32: |
| case INDEX_op_extract_i64: |
| case INDEX_op_bswap16_i32: |
| case INDEX_op_bswap16_i64: |
| case INDEX_op_bswap32_i32: |
| case INDEX_op_bswap32_i64: |
| case INDEX_op_bswap64_i64: |
| case INDEX_op_ld8s_i32: |
| case INDEX_op_ld8s_i64: |
| case INDEX_op_ld8u_i32: |
| case INDEX_op_ld8u_i64: |
| case INDEX_op_ld16s_i32: |
| case INDEX_op_ld16s_i64: |
| case INDEX_op_ld16u_i32: |
| case INDEX_op_ld16u_i64: |
| case INDEX_op_ld32s_i64: |
| case INDEX_op_ld32u_i64: |
| case INDEX_op_ld_i32: |
| case INDEX_op_ld_i64: |
| return C_O1_I1(r, r); |
| |
| case INDEX_op_qemu_ld_i32: |
| case INDEX_op_qemu_ld_i64: |
| return C_O1_I1(r, L); |
| |
| case INDEX_op_andc_i32: |
| case INDEX_op_andc_i64: |
| case INDEX_op_orc_i32: |
| case INDEX_op_orc_i64: |
| /* |
| * LoongArch insns for these ops don't have reg-imm forms, but we |
| * can express using andi/ori if ~constant satisfies |
| * TCG_CT_CONST_U12. |
| */ |
| return C_O1_I2(r, r, rC); |
| |
| case INDEX_op_shl_i32: |
| case INDEX_op_shl_i64: |
| case INDEX_op_shr_i32: |
| case INDEX_op_shr_i64: |
| case INDEX_op_sar_i32: |
| case INDEX_op_sar_i64: |
| case INDEX_op_rotl_i32: |
| case INDEX_op_rotl_i64: |
| case INDEX_op_rotr_i32: |
| case INDEX_op_rotr_i64: |
| return C_O1_I2(r, r, ri); |
| |
| case INDEX_op_add_i32: |
| case INDEX_op_add_i64: |
| return C_O1_I2(r, r, rI); |
| |
| case INDEX_op_and_i32: |
| case INDEX_op_and_i64: |
| case INDEX_op_nor_i32: |
| case INDEX_op_nor_i64: |
| case INDEX_op_or_i32: |
| case INDEX_op_or_i64: |
| case INDEX_op_xor_i32: |
| case INDEX_op_xor_i64: |
| /* LoongArch reg-imm bitops have their imms ZERO-extended */ |
| return C_O1_I2(r, r, rU); |
| |
| case INDEX_op_clz_i32: |
| case INDEX_op_clz_i64: |
| case INDEX_op_ctz_i32: |
| case INDEX_op_ctz_i64: |
| return C_O1_I2(r, r, rW); |
| |
| case INDEX_op_setcond_i32: |
| case INDEX_op_setcond_i64: |
| return C_O1_I2(r, r, rZ); |
| |
| case INDEX_op_deposit_i32: |
| case INDEX_op_deposit_i64: |
| /* Must deposit into the same register as input */ |
| return C_O1_I2(r, 0, rZ); |
| |
| case INDEX_op_sub_i32: |
| case INDEX_op_sub_i64: |
| return C_O1_I2(r, rZ, rN); |
| |
| case INDEX_op_mul_i32: |
| case INDEX_op_mul_i64: |
| case INDEX_op_mulsh_i32: |
| case INDEX_op_mulsh_i64: |
| case INDEX_op_muluh_i32: |
| case INDEX_op_muluh_i64: |
| case INDEX_op_div_i32: |
| case INDEX_op_div_i64: |
| case INDEX_op_divu_i32: |
| case INDEX_op_divu_i64: |
| case INDEX_op_rem_i32: |
| case INDEX_op_rem_i64: |
| case INDEX_op_remu_i32: |
| case INDEX_op_remu_i64: |
| return C_O1_I2(r, rZ, rZ); |
| |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static const int tcg_target_callee_save_regs[] = { |
| TCG_REG_S0, /* used for the global env (TCG_AREG0) */ |
| TCG_REG_S1, |
| TCG_REG_S2, |
| TCG_REG_S3, |
| TCG_REG_S4, |
| TCG_REG_S5, |
| TCG_REG_S6, |
| TCG_REG_S7, |
| TCG_REG_S8, |
| TCG_REG_S9, |
| TCG_REG_RA, /* should be last for ABI compliance */ |
| }; |
| |
| /* Stack frame parameters. */ |
| #define REG_SIZE (TCG_TARGET_REG_BITS / 8) |
| #define SAVE_SIZE ((int)ARRAY_SIZE(tcg_target_callee_save_regs) * REG_SIZE) |
| #define TEMP_SIZE (CPU_TEMP_BUF_NLONGS * (int)sizeof(long)) |
| #define FRAME_SIZE ((TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE + SAVE_SIZE \ |
| + TCG_TARGET_STACK_ALIGN - 1) \ |
| & -TCG_TARGET_STACK_ALIGN) |
| #define SAVE_OFS (TCG_STATIC_CALL_ARGS_SIZE + TEMP_SIZE) |
| |
| /* We're expecting to be able to use an immediate for frame allocation. */ |
| QEMU_BUILD_BUG_ON(FRAME_SIZE > 0x7ff); |
| |
| /* Generate global QEMU prologue and epilogue code */ |
| static void tcg_target_qemu_prologue(TCGContext *s) |
| { |
| int i; |
| |
| tcg_set_frame(s, TCG_REG_SP, TCG_STATIC_CALL_ARGS_SIZE, TEMP_SIZE); |
| |
| /* TB prologue */ |
| tcg_out_opc_addi_d(s, TCG_REG_SP, TCG_REG_SP, -FRAME_SIZE); |
| for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { |
| tcg_out_st(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], |
| TCG_REG_SP, SAVE_OFS + i * REG_SIZE); |
| } |
| |
| #if !defined(CONFIG_SOFTMMU) |
| if (USE_GUEST_BASE) { |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_GUEST_BASE_REG, guest_base); |
| tcg_regset_set_reg(s->reserved_regs, TCG_GUEST_BASE_REG); |
| } |
| #endif |
| |
| /* Call generated code */ |
| tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); |
| tcg_out_opc_jirl(s, TCG_REG_ZERO, tcg_target_call_iarg_regs[1], 0); |
| |
| /* Return path for goto_ptr. Set return value to 0 */ |
| tcg_code_gen_epilogue = tcg_splitwx_to_rx(s->code_ptr); |
| tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO); |
| |
| /* TB epilogue */ |
| tb_ret_addr = tcg_splitwx_to_rx(s->code_ptr); |
| for (i = 0; i < ARRAY_SIZE(tcg_target_callee_save_regs); i++) { |
| tcg_out_ld(s, TCG_TYPE_REG, tcg_target_callee_save_regs[i], |
| TCG_REG_SP, SAVE_OFS + i * REG_SIZE); |
| } |
| |
| tcg_out_opc_addi_d(s, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE); |
| tcg_out_opc_jirl(s, TCG_REG_ZERO, TCG_REG_RA, 0); |
| } |
| |
| static void tcg_target_init(TCGContext *s) |
| { |
| tcg_target_available_regs[TCG_TYPE_I32] = ALL_GENERAL_REGS; |
| tcg_target_available_regs[TCG_TYPE_I64] = ALL_GENERAL_REGS; |
| |
| tcg_target_call_clobber_regs = ALL_GENERAL_REGS; |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S0); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S1); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S2); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S3); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S4); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S5); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S6); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S7); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S8); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S9); |
| |
| s->reserved_regs = 0; |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_ZERO); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP0); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP1); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP2); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_SP); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_RESERVED); |
| } |
| |
| typedef struct { |
| DebugFrameHeader h; |
| uint8_t fde_def_cfa[4]; |
| uint8_t fde_reg_ofs[ARRAY_SIZE(tcg_target_callee_save_regs) * 2]; |
| } DebugFrame; |
| |
| #define ELF_HOST_MACHINE EM_LOONGARCH |
| |
| static const DebugFrame debug_frame = { |
| .h.cie.len = sizeof(DebugFrameCIE) - 4, /* length after .len member */ |
| .h.cie.id = -1, |
| .h.cie.version = 1, |
| .h.cie.code_align = 1, |
| .h.cie.data_align = -(TCG_TARGET_REG_BITS / 8) & 0x7f, /* sleb128 */ |
| .h.cie.return_column = TCG_REG_RA, |
| |
| /* Total FDE size does not include the "len" member. */ |
| .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), |
| |
| .fde_def_cfa = { |
| 12, TCG_REG_SP, /* DW_CFA_def_cfa sp, ... */ |
| (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ |
| (FRAME_SIZE >> 7) |
| }, |
| .fde_reg_ofs = { |
| 0x80 + 23, 11, /* DW_CFA_offset, s0, -88 */ |
| 0x80 + 24, 10, /* DW_CFA_offset, s1, -80 */ |
| 0x80 + 25, 9, /* DW_CFA_offset, s2, -72 */ |
| 0x80 + 26, 8, /* DW_CFA_offset, s3, -64 */ |
| 0x80 + 27, 7, /* DW_CFA_offset, s4, -56 */ |
| 0x80 + 28, 6, /* DW_CFA_offset, s5, -48 */ |
| 0x80 + 29, 5, /* DW_CFA_offset, s6, -40 */ |
| 0x80 + 30, 4, /* DW_CFA_offset, s7, -32 */ |
| 0x80 + 31, 3, /* DW_CFA_offset, s8, -24 */ |
| 0x80 + 22, 2, /* DW_CFA_offset, s9, -16 */ |
| 0x80 + 1 , 1, /* DW_CFA_offset, ra, -8 */ |
| } |
| }; |
| |
| void tcg_register_jit(const void *buf, size_t buf_size) |
| { |
| tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); |
| } |
