| /* |
| * Tiny Code Generator for QEMU |
| * |
| * 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 |
| * |
| * Based on i386/tcg-target.c and mips/tcg-target.c |
| * |
| * 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" |
| #include "../tcg-pool.c.inc" |
| |
| #ifdef CONFIG_DEBUG_TCG |
| static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { |
| "zero", |
| "ra", |
| "sp", |
| "gp", |
| "tp", |
| "t0", |
| "t1", |
| "t2", |
| "s0", |
| "s1", |
| "a0", |
| "a1", |
| "a2", |
| "a3", |
| "a4", |
| "a5", |
| "a6", |
| "a7", |
| "s2", |
| "s3", |
| "s4", |
| "s5", |
| "s6", |
| "s7", |
| "s8", |
| "s9", |
| "s10", |
| "s11", |
| "t3", |
| "t4", |
| "t5", |
| "t6" |
| }; |
| #endif |
| |
| static const int tcg_target_reg_alloc_order[] = { |
| /* Call saved registers */ |
| /* TCG_REG_S0 reservered 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, |
| TCG_REG_S10, |
| TCG_REG_S11, |
| |
| /* Call clobbered registers */ |
| TCG_REG_T0, |
| TCG_REG_T1, |
| TCG_REG_T2, |
| TCG_REG_T3, |
| TCG_REG_T4, |
| TCG_REG_T5, |
| TCG_REG_T6, |
| |
| /* Argument registers */ |
| 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_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 TCGReg tcg_target_call_oarg_reg(TCGCallReturnKind kind, int slot) |
| { |
| tcg_debug_assert(kind == TCG_CALL_RET_NORMAL); |
| tcg_debug_assert(slot >= 0 && slot <= 1); |
| return TCG_REG_A0 + slot; |
| } |
| |
| #define TCG_CT_CONST_ZERO 0x100 |
| #define TCG_CT_CONST_S12 0x200 |
| #define TCG_CT_CONST_N12 0x400 |
| #define TCG_CT_CONST_M12 0x800 |
| |
| #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) |
| { |
| if (TCG_TARGET_REG_BITS == 32) { |
| return sextract32(val, pos, len); |
| } else { |
| 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 1; |
| } |
| if ((ct & TCG_CT_CONST_ZERO) && val == 0) { |
| return 1; |
| } |
| /* |
| * Sign extended from 12 bits: [-0x800, 0x7ff]. |
| * Used for most arithmetic, as this is the isa field. |
| */ |
| if ((ct & TCG_CT_CONST_S12) && val >= -0x800 && val <= 0x7ff) { |
| return 1; |
| } |
| /* |
| * Sign extended from 12 bits, negated: [-0x7ff, 0x800]. |
| * Used for subtraction, where a constant must be handled by ADDI. |
| */ |
| if ((ct & TCG_CT_CONST_N12) && val >= -0x7ff && val <= 0x800) { |
| return 1; |
| } |
| /* |
| * Sign extended from 12 bits, +/- matching: [-0x7ff, 0x7ff]. |
| * Used by addsub2, which may need the negative operation, |
| * and requires the modified constant to be representable. |
| */ |
| if ((ct & TCG_CT_CONST_M12) && val >= -0x7ff && val <= 0x7ff) { |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* |
| * RISC-V Base ISA opcodes (IM) |
| */ |
| |
| typedef enum { |
| OPC_ADD = 0x33, |
| OPC_ADDI = 0x13, |
| OPC_AND = 0x7033, |
| OPC_ANDI = 0x7013, |
| OPC_AUIPC = 0x17, |
| OPC_BEQ = 0x63, |
| OPC_BGE = 0x5063, |
| OPC_BGEU = 0x7063, |
| OPC_BLT = 0x4063, |
| OPC_BLTU = 0x6063, |
| OPC_BNE = 0x1063, |
| OPC_DIV = 0x2004033, |
| OPC_DIVU = 0x2005033, |
| OPC_JAL = 0x6f, |
| OPC_JALR = 0x67, |
| OPC_LB = 0x3, |
| OPC_LBU = 0x4003, |
| OPC_LD = 0x3003, |
| OPC_LH = 0x1003, |
| OPC_LHU = 0x5003, |
| OPC_LUI = 0x37, |
| OPC_LW = 0x2003, |
| OPC_LWU = 0x6003, |
| OPC_MUL = 0x2000033, |
| OPC_MULH = 0x2001033, |
| OPC_MULHSU = 0x2002033, |
| OPC_MULHU = 0x2003033, |
| OPC_OR = 0x6033, |
| OPC_ORI = 0x6013, |
| OPC_REM = 0x2006033, |
| OPC_REMU = 0x2007033, |
| OPC_SB = 0x23, |
| OPC_SD = 0x3023, |
| OPC_SH = 0x1023, |
| OPC_SLL = 0x1033, |
| OPC_SLLI = 0x1013, |
| OPC_SLT = 0x2033, |
| OPC_SLTI = 0x2013, |
| OPC_SLTIU = 0x3013, |
| OPC_SLTU = 0x3033, |
| OPC_SRA = 0x40005033, |
| OPC_SRAI = 0x40005013, |
| OPC_SRL = 0x5033, |
| OPC_SRLI = 0x5013, |
| OPC_SUB = 0x40000033, |
| OPC_SW = 0x2023, |
| OPC_XOR = 0x4033, |
| OPC_XORI = 0x4013, |
| |
| #if TCG_TARGET_REG_BITS == 64 |
| OPC_ADDIW = 0x1b, |
| OPC_ADDW = 0x3b, |
| OPC_DIVUW = 0x200503b, |
| OPC_DIVW = 0x200403b, |
| OPC_MULW = 0x200003b, |
| OPC_REMUW = 0x200703b, |
| OPC_REMW = 0x200603b, |
| OPC_SLLIW = 0x101b, |
| OPC_SLLW = 0x103b, |
| OPC_SRAIW = 0x4000501b, |
| OPC_SRAW = 0x4000503b, |
| OPC_SRLIW = 0x501b, |
| OPC_SRLW = 0x503b, |
| OPC_SUBW = 0x4000003b, |
| #else |
| /* Simplify code throughout by defining aliases for RV32. */ |
| OPC_ADDIW = OPC_ADDI, |
| OPC_ADDW = OPC_ADD, |
| OPC_DIVUW = OPC_DIVU, |
| OPC_DIVW = OPC_DIV, |
| OPC_MULW = OPC_MUL, |
| OPC_REMUW = OPC_REMU, |
| OPC_REMW = OPC_REM, |
| OPC_SLLIW = OPC_SLLI, |
| OPC_SLLW = OPC_SLL, |
| OPC_SRAIW = OPC_SRAI, |
| OPC_SRAW = OPC_SRA, |
| OPC_SRLIW = OPC_SRLI, |
| OPC_SRLW = OPC_SRL, |
| OPC_SUBW = OPC_SUB, |
| #endif |
| |
| OPC_FENCE = 0x0000000f, |
| OPC_NOP = OPC_ADDI, /* nop = addi r0,r0,0 */ |
| } RISCVInsn; |
| |
| /* |
| * RISC-V immediate and instruction encoders (excludes 16-bit RVC) |
| */ |
| |
| /* Type-R */ |
| |
| static int32_t encode_r(RISCVInsn opc, TCGReg rd, TCGReg rs1, TCGReg rs2) |
| { |
| return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20; |
| } |
| |
| /* Type-I */ |
| |
| static int32_t encode_imm12(uint32_t imm) |
| { |
| return (imm & 0xfff) << 20; |
| } |
| |
| static int32_t encode_i(RISCVInsn opc, TCGReg rd, TCGReg rs1, uint32_t imm) |
| { |
| return opc | (rd & 0x1f) << 7 | (rs1 & 0x1f) << 15 | encode_imm12(imm); |
| } |
| |
| /* Type-S */ |
| |
| static int32_t encode_simm12(uint32_t imm) |
| { |
| int32_t ret = 0; |
| |
| ret |= (imm & 0xFE0) << 20; |
| ret |= (imm & 0x1F) << 7; |
| |
| return ret; |
| } |
| |
| static int32_t encode_s(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm) |
| { |
| return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_simm12(imm); |
| } |
| |
| /* Type-SB */ |
| |
| static int32_t encode_sbimm12(uint32_t imm) |
| { |
| int32_t ret = 0; |
| |
| ret |= (imm & 0x1000) << 19; |
| ret |= (imm & 0x7e0) << 20; |
| ret |= (imm & 0x1e) << 7; |
| ret |= (imm & 0x800) >> 4; |
| |
| return ret; |
| } |
| |
| static int32_t encode_sb(RISCVInsn opc, TCGReg rs1, TCGReg rs2, uint32_t imm) |
| { |
| return opc | (rs1 & 0x1f) << 15 | (rs2 & 0x1f) << 20 | encode_sbimm12(imm); |
| } |
| |
| /* Type-U */ |
| |
| static int32_t encode_uimm20(uint32_t imm) |
| { |
| return imm & 0xfffff000; |
| } |
| |
| static int32_t encode_u(RISCVInsn opc, TCGReg rd, uint32_t imm) |
| { |
| return opc | (rd & 0x1f) << 7 | encode_uimm20(imm); |
| } |
| |
| /* Type-UJ */ |
| |
| static int32_t encode_ujimm20(uint32_t imm) |
| { |
| int32_t ret = 0; |
| |
| ret |= (imm & 0x0007fe) << (21 - 1); |
| ret |= (imm & 0x000800) << (20 - 11); |
| ret |= (imm & 0x0ff000) << (12 - 12); |
| ret |= (imm & 0x100000) << (31 - 20); |
| |
| return ret; |
| } |
| |
| static int32_t encode_uj(RISCVInsn opc, TCGReg rd, uint32_t imm) |
| { |
| return opc | (rd & 0x1f) << 7 | encode_ujimm20(imm); |
| } |
| |
| /* |
| * RISC-V instruction emitters |
| */ |
| |
| static void tcg_out_opc_reg(TCGContext *s, RISCVInsn opc, |
| TCGReg rd, TCGReg rs1, TCGReg rs2) |
| { |
| tcg_out32(s, encode_r(opc, rd, rs1, rs2)); |
| } |
| |
| static void tcg_out_opc_imm(TCGContext *s, RISCVInsn opc, |
| TCGReg rd, TCGReg rs1, TCGArg imm) |
| { |
| tcg_out32(s, encode_i(opc, rd, rs1, imm)); |
| } |
| |
| static void tcg_out_opc_store(TCGContext *s, RISCVInsn opc, |
| TCGReg rs1, TCGReg rs2, uint32_t imm) |
| { |
| tcg_out32(s, encode_s(opc, rs1, rs2, imm)); |
| } |
| |
| static void tcg_out_opc_branch(TCGContext *s, RISCVInsn opc, |
| TCGReg rs1, TCGReg rs2, uint32_t imm) |
| { |
| tcg_out32(s, encode_sb(opc, rs1, rs2, imm)); |
| } |
| |
| static void tcg_out_opc_upper(TCGContext *s, RISCVInsn opc, |
| TCGReg rd, uint32_t imm) |
| { |
| tcg_out32(s, encode_u(opc, rd, imm)); |
| } |
| |
| static void tcg_out_opc_jump(TCGContext *s, RISCVInsn opc, |
| TCGReg rd, uint32_t imm) |
| { |
| tcg_out32(s, encode_uj(opc, rd, imm)); |
| } |
| |
| static void tcg_out_nop_fill(tcg_insn_unit *p, int count) |
| { |
| int i; |
| for (i = 0; i < count; ++i) { |
| p[i] = OPC_NOP; |
| } |
| } |
| |
| /* |
| * Relocations |
| */ |
| |
| static bool reloc_sbimm12(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 & 1) == 0); |
| if (offset == sextreg(offset, 0, 12)) { |
| *src_rw |= encode_sbimm12(offset); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool reloc_jimm20(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 & 1) == 0); |
| if (offset == sextreg(offset, 0, 20)) { |
| *src_rw |= encode_ujimm20(offset); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static bool reloc_call(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; |
| int32_t lo = sextreg(offset, 0, 12); |
| int32_t hi = offset - lo; |
| |
| if (offset == hi + lo) { |
| src_rw[0] |= encode_uimm20(hi); |
| src_rw[1] |= encode_imm12(lo); |
| 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_RISCV_BRANCH: |
| return reloc_sbimm12(code_ptr, (tcg_insn_unit *)value); |
| case R_RISCV_JAL: |
| return reloc_jimm20(code_ptr, (tcg_insn_unit *)value); |
| case R_RISCV_CALL: |
| return reloc_call(code_ptr, (tcg_insn_unit *)value); |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| /* |
| * TCG intrinsics |
| */ |
| |
| 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: |
| tcg_out_opc_imm(s, OPC_ADDI, ret, arg, 0); |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| return true; |
| } |
| |
| static void tcg_out_movi(TCGContext *s, TCGType type, TCGReg rd, |
| tcg_target_long val) |
| { |
| tcg_target_long lo, hi, tmp; |
| int shift, ret; |
| |
| if (TCG_TARGET_REG_BITS == 64 && type == TCG_TYPE_I32) { |
| val = (int32_t)val; |
| } |
| |
| lo = sextreg(val, 0, 12); |
| if (val == lo) { |
| tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, lo); |
| return; |
| } |
| |
| hi = val - lo; |
| if (TCG_TARGET_REG_BITS == 32 || val == (int32_t)val) { |
| tcg_out_opc_upper(s, OPC_LUI, rd, hi); |
| if (lo != 0) { |
| tcg_out_opc_imm(s, OPC_ADDIW, rd, rd, lo); |
| } |
| return; |
| } |
| |
| /* We can only be here if TCG_TARGET_REG_BITS != 32 */ |
| tmp = tcg_pcrel_diff(s, (void *)val); |
| if (tmp == (int32_t)tmp) { |
| tcg_out_opc_upper(s, OPC_AUIPC, rd, 0); |
| tcg_out_opc_imm(s, OPC_ADDI, rd, rd, 0); |
| ret = reloc_call(s->code_ptr - 2, (const tcg_insn_unit *)val); |
| tcg_debug_assert(ret == true); |
| return; |
| } |
| |
| /* Look for a single 20-bit section. */ |
| shift = ctz64(val); |
| tmp = val >> shift; |
| if (tmp == sextreg(tmp, 0, 20)) { |
| tcg_out_opc_upper(s, OPC_LUI, rd, tmp << 12); |
| if (shift > 12) { |
| tcg_out_opc_imm(s, OPC_SLLI, rd, rd, shift - 12); |
| } else { |
| tcg_out_opc_imm(s, OPC_SRAI, rd, rd, 12 - shift); |
| } |
| return; |
| } |
| |
| /* Look for a few high zero bits, with lots of bits set in the middle. */ |
| shift = clz64(val); |
| tmp = val << shift; |
| if (tmp == sextreg(tmp, 12, 20) << 12) { |
| tcg_out_opc_upper(s, OPC_LUI, rd, tmp); |
| tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift); |
| return; |
| } else if (tmp == sextreg(tmp, 0, 12)) { |
| tcg_out_opc_imm(s, OPC_ADDI, rd, TCG_REG_ZERO, tmp); |
| tcg_out_opc_imm(s, OPC_SRLI, rd, rd, shift); |
| return; |
| } |
| |
| /* Drop into the constant pool. */ |
| new_pool_label(s, val, R_RISCV_CALL, s->code_ptr, 0); |
| tcg_out_opc_upper(s, OPC_AUIPC, rd, 0); |
| tcg_out_opc_imm(s, OPC_LD, rd, rd, 0); |
| } |
| |
| static void tcg_out_addi_ptr(TCGContext *s, TCGReg rd, TCGReg rs, |
| tcg_target_long imm) |
| { |
| /* This function is only used for passing structs by reference. */ |
| g_assert_not_reached(); |
| } |
| |
| static void tcg_out_ext8u(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_imm(s, OPC_ANDI, ret, arg, 0xff); |
| } |
| |
| static void tcg_out_ext16u(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16); |
| tcg_out_opc_imm(s, OPC_SRLIW, ret, ret, 16); |
| } |
| |
| static void tcg_out_ext32u(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_imm(s, OPC_SLLI, ret, arg, 32); |
| tcg_out_opc_imm(s, OPC_SRLI, ret, ret, 32); |
| } |
| |
| static void tcg_out_ext8s(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 24); |
| tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 24); |
| } |
| |
| static void tcg_out_ext16s(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_imm(s, OPC_SLLIW, ret, arg, 16); |
| tcg_out_opc_imm(s, OPC_SRAIW, ret, ret, 16); |
| } |
| |
| static void tcg_out_ext32s(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_opc_imm(s, OPC_ADDIW, ret, arg, 0); |
| } |
| |
| static void tcg_out_exts_i32_i64(TCGContext *s, TCGReg ret, TCGReg arg) |
| { |
| tcg_out_ext32s(s, ret, arg); |
| } |
| |
| static void tcg_out_ldst(TCGContext *s, RISCVInsn opc, TCGReg data, |
| TCGReg addr, intptr_t offset) |
| { |
| intptr_t imm12 = sextreg(offset, 0, 12); |
| |
| if (offset != imm12) { |
| intptr_t diff = tcg_pcrel_diff(s, (void *)offset); |
| |
| if (addr == TCG_REG_ZERO && diff == (int32_t)diff) { |
| imm12 = sextreg(diff, 0, 12); |
| tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP2, diff - imm12); |
| } else { |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP2, offset - imm12); |
| if (addr != TCG_REG_ZERO) { |
| tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP2, TCG_REG_TMP2, addr); |
| } |
| } |
| addr = TCG_REG_TMP2; |
| } |
| |
| switch (opc) { |
| case OPC_SB: |
| case OPC_SH: |
| case OPC_SW: |
| case OPC_SD: |
| tcg_out_opc_store(s, opc, addr, data, imm12); |
| break; |
| case OPC_LB: |
| case OPC_LBU: |
| case OPC_LH: |
| case OPC_LHU: |
| case OPC_LW: |
| case OPC_LWU: |
| case OPC_LD: |
| tcg_out_opc_imm(s, 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 is32bit = (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32); |
| tcg_out_ldst(s, is32bit ? OPC_LW : OPC_LD, arg, arg1, arg2); |
| } |
| |
| static void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, |
| TCGReg arg1, intptr_t arg2) |
| { |
| bool is32bit = (TCG_TARGET_REG_BITS == 32 || type == TCG_TYPE_I32); |
| tcg_out_ldst(s, is32bit ? OPC_SW : OPC_SD, 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; |
| } |
| |
| static void tcg_out_addsub2(TCGContext *s, |
| TCGReg rl, TCGReg rh, |
| TCGReg al, TCGReg ah, |
| TCGArg bl, TCGArg bh, |
| bool cbl, bool cbh, bool is_sub, bool is32bit) |
| { |
| const RISCVInsn opc_add = is32bit ? OPC_ADDW : OPC_ADD; |
| const RISCVInsn opc_addi = is32bit ? OPC_ADDIW : OPC_ADDI; |
| const RISCVInsn opc_sub = is32bit ? OPC_SUBW : OPC_SUB; |
| TCGReg th = TCG_REG_TMP1; |
| |
| /* If we have a negative constant such that negating it would |
| make the high part zero, we can (usually) eliminate one insn. */ |
| if (cbl && cbh && bh == -1 && bl != 0) { |
| bl = -bl; |
| bh = 0; |
| is_sub = !is_sub; |
| } |
| |
| /* By operating on the high part first, we get to use the final |
| carry operation to move back from the temporary. */ |
| if (!cbh) { |
| tcg_out_opc_reg(s, (is_sub ? opc_sub : opc_add), th, ah, bh); |
| } else if (bh != 0 || ah == rl) { |
| tcg_out_opc_imm(s, opc_addi, th, ah, (is_sub ? -bh : bh)); |
| } else { |
| th = ah; |
| } |
| |
| /* Note that tcg optimization should eliminate the bl == 0 case. */ |
| if (is_sub) { |
| if (cbl) { |
| tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, al, bl); |
| tcg_out_opc_imm(s, opc_addi, rl, al, -bl); |
| } else { |
| tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0, al, bl); |
| tcg_out_opc_reg(s, opc_sub, rl, al, bl); |
| } |
| tcg_out_opc_reg(s, opc_sub, rh, th, TCG_REG_TMP0); |
| } else { |
| if (cbl) { |
| tcg_out_opc_imm(s, opc_addi, rl, al, bl); |
| tcg_out_opc_imm(s, OPC_SLTIU, TCG_REG_TMP0, rl, bl); |
| } else if (al == bl) { |
| /* |
| * If the input regs overlap, this is a simple doubling |
| * and carry-out is the input msb. This special case is |
| * required when the output reg overlaps the input, |
| * but we might as well use it always. |
| */ |
| tcg_out_opc_imm(s, OPC_SLTI, TCG_REG_TMP0, al, 0); |
| tcg_out_opc_reg(s, opc_add, rl, al, al); |
| } else { |
| tcg_out_opc_reg(s, opc_add, rl, al, bl); |
| tcg_out_opc_reg(s, OPC_SLTU, TCG_REG_TMP0, |
| rl, (rl == bl ? al : bl)); |
| } |
| tcg_out_opc_reg(s, opc_add, rh, th, TCG_REG_TMP0); |
| } |
| } |
| |
| static const struct { |
| RISCVInsn op; |
| bool swap; |
| } tcg_brcond_to_riscv[] = { |
| [TCG_COND_EQ] = { OPC_BEQ, false }, |
| [TCG_COND_NE] = { OPC_BNE, false }, |
| [TCG_COND_LT] = { OPC_BLT, false }, |
| [TCG_COND_GE] = { OPC_BGE, false }, |
| [TCG_COND_LE] = { OPC_BGE, true }, |
| [TCG_COND_GT] = { OPC_BLT, true }, |
| [TCG_COND_LTU] = { OPC_BLTU, false }, |
| [TCG_COND_GEU] = { OPC_BGEU, false }, |
| [TCG_COND_LEU] = { OPC_BGEU, true }, |
| [TCG_COND_GTU] = { OPC_BLTU, true } |
| }; |
| |
| static void tcg_out_brcond(TCGContext *s, TCGCond cond, TCGReg arg1, |
| TCGReg arg2, TCGLabel *l) |
| { |
| RISCVInsn op = tcg_brcond_to_riscv[cond].op; |
| |
| tcg_debug_assert(op != 0); |
| |
| if (tcg_brcond_to_riscv[cond].swap) { |
| TCGReg t = arg1; |
| arg1 = arg2; |
| arg2 = t; |
| } |
| |
| tcg_out_reloc(s, s->code_ptr, R_RISCV_BRANCH, l, 0); |
| tcg_out_opc_branch(s, op, arg1, arg2, 0); |
| } |
| |
| static void tcg_out_setcond(TCGContext *s, TCGCond cond, TCGReg ret, |
| TCGReg arg1, TCGReg arg2) |
| { |
| switch (cond) { |
| case TCG_COND_EQ: |
| tcg_out_opc_reg(s, OPC_SUB, ret, arg1, arg2); |
| tcg_out_opc_imm(s, OPC_SLTIU, ret, ret, 1); |
| break; |
| case TCG_COND_NE: |
| tcg_out_opc_reg(s, OPC_SUB, ret, arg1, arg2); |
| tcg_out_opc_reg(s, OPC_SLTU, ret, TCG_REG_ZERO, ret); |
| break; |
| case TCG_COND_LT: |
| tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2); |
| break; |
| case TCG_COND_GE: |
| tcg_out_opc_reg(s, OPC_SLT, ret, arg1, arg2); |
| tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); |
| break; |
| case TCG_COND_LE: |
| tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1); |
| tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); |
| break; |
| case TCG_COND_GT: |
| tcg_out_opc_reg(s, OPC_SLT, ret, arg2, arg1); |
| break; |
| case TCG_COND_LTU: |
| tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2); |
| break; |
| case TCG_COND_GEU: |
| tcg_out_opc_reg(s, OPC_SLTU, ret, arg1, arg2); |
| tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); |
| break; |
| case TCG_COND_LEU: |
| tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1); |
| tcg_out_opc_imm(s, OPC_XORI, ret, ret, 1); |
| break; |
| case TCG_COND_GTU: |
| tcg_out_opc_reg(s, OPC_SLTU, ret, arg2, arg1); |
| break; |
| default: |
| g_assert_not_reached(); |
| break; |
| } |
| } |
| |
| static void tcg_out_brcond2(TCGContext *s, TCGCond cond, TCGReg al, TCGReg ah, |
| TCGReg bl, TCGReg bh, TCGLabel *l) |
| { |
| /* todo */ |
| g_assert_not_reached(); |
| } |
| |
| static void tcg_out_setcond2(TCGContext *s, TCGCond cond, TCGReg ret, |
| TCGReg al, TCGReg ah, TCGReg bl, TCGReg bh) |
| { |
| /* todo */ |
| g_assert_not_reached(); |
| } |
| |
| 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); |
| int ret; |
| |
| tcg_debug_assert((offset & 1) == 0); |
| if (offset == sextreg(offset, 0, 20)) { |
| /* short jump: -2097150 to 2097152 */ |
| tcg_out_opc_jump(s, OPC_JAL, link, offset); |
| } else if (TCG_TARGET_REG_BITS == 32 || offset == (int32_t)offset) { |
| /* long jump: -2147483646 to 2147483648 */ |
| tcg_out_opc_upper(s, OPC_AUIPC, TCG_REG_TMP0, 0); |
| tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, 0); |
| ret = reloc_call(s->code_ptr - 2, arg); |
| tcg_debug_assert(ret == true); |
| } else if (TCG_TARGET_REG_BITS == 64) { |
| /* far jump: 64-bit */ |
| tcg_target_long imm = sextreg((tcg_target_long)arg, 0, 12); |
| tcg_target_long base = (tcg_target_long)arg - imm; |
| tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP0, base); |
| tcg_out_opc_imm(s, OPC_JALR, link, TCG_REG_TMP0, imm); |
| } else { |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void tcg_out_call(TCGContext *s, const tcg_insn_unit *arg, |
| const TCGHelperInfo *info) |
| { |
| tcg_out_call_int(s, arg, false); |
| } |
| |
| static void tcg_out_mb(TCGContext *s, TCGArg a0) |
| { |
| tcg_insn_unit insn = OPC_FENCE; |
| |
| if (a0 & TCG_MO_LD_LD) { |
| insn |= 0x02200000; |
| } |
| if (a0 & TCG_MO_ST_LD) { |
| insn |= 0x01200000; |
| } |
| if (a0 & TCG_MO_LD_ST) { |
| insn |= 0x02100000; |
| } |
| if (a0 & TCG_MO_ST_ST) { |
| insn |= 0x02200000; |
| } |
| tcg_out32(s, insn); |
| } |
| |
| /* |
| * Load/store and TLB |
| */ |
| |
| #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[MO_SSIZE + 1] = { |
| [MO_UB] = helper_ret_ldub_mmu, |
| [MO_SB] = helper_ret_ldsb_mmu, |
| #if HOST_BIG_ENDIAN |
| [MO_UW] = helper_be_lduw_mmu, |
| [MO_SW] = helper_be_ldsw_mmu, |
| [MO_UL] = helper_be_ldul_mmu, |
| #if TCG_TARGET_REG_BITS == 64 |
| [MO_SL] = helper_be_ldsl_mmu, |
| #endif |
| [MO_UQ] = helper_be_ldq_mmu, |
| #else |
| [MO_UW] = helper_le_lduw_mmu, |
| [MO_SW] = helper_le_ldsw_mmu, |
| [MO_UL] = helper_le_ldul_mmu, |
| #if TCG_TARGET_REG_BITS == 64 |
| [MO_SL] = helper_le_ldsl_mmu, |
| #endif |
| [MO_UQ] = helper_le_ldq_mmu, |
| #endif |
| }; |
| |
| /* 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[MO_SIZE + 1] = { |
| [MO_8] = helper_ret_stb_mmu, |
| #if HOST_BIG_ENDIAN |
| [MO_16] = helper_be_stw_mmu, |
| [MO_32] = helper_be_stl_mmu, |
| [MO_64] = helper_be_stq_mmu, |
| #else |
| [MO_16] = helper_le_stw_mmu, |
| [MO_32] = helper_le_stl_mmu, |
| [MO_64] = helper_le_stq_mmu, |
| #endif |
| }; |
| |
| /* We don't support oversize guests */ |
| QEMU_BUILD_BUG_ON(TCG_TARGET_REG_BITS < TARGET_LONG_BITS); |
| |
| /* 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 void tcg_out_goto(TCGContext *s, const tcg_insn_unit *target) |
| { |
| tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0); |
| bool ok = reloc_jimm20(s->code_ptr - 1, target); |
| tcg_debug_assert(ok); |
| } |
| |
| static TCGReg tcg_out_tlb_load(TCGContext *s, TCGReg addrl, |
| TCGReg addrh, 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); |
| TCGReg mask_base = TCG_AREG0, table_base = TCG_AREG0; |
| |
| tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, mask_base, mask_ofs); |
| tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, table_base, table_ofs); |
| |
| tcg_out_opc_imm(s, OPC_SRLI, TCG_REG_TMP2, addrl, |
| TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS); |
| tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP2, TCG_REG_TMP2, TCG_REG_TMP0); |
| tcg_out_opc_reg(s, OPC_ADD, 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); |
| if (compare_mask == sextreg(compare_mask, 0, 12)) { |
| tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_TMP1, addrl, compare_mask); |
| } else { |
| tcg_out_movi(s, TCG_TYPE_TL, TCG_REG_TMP1, compare_mask); |
| tcg_out_opc_reg(s, OPC_AND, TCG_REG_TMP1, TCG_REG_TMP1, addrl); |
| } |
| |
| /* Compare masked address with the TLB entry. */ |
| label_ptr[0] = s->code_ptr; |
| tcg_out_opc_branch(s, OPC_BNE, TCG_REG_TMP0, TCG_REG_TMP1, 0); |
| |
| /* TLB Hit - translate address using addend. */ |
| if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { |
| tcg_out_ext32u(s, TCG_REG_TMP0, addrl); |
| addrl = TCG_REG_TMP0; |
| } |
| tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP0, TCG_REG_TMP2, addrl); |
| return TCG_REG_TMP0; |
| } |
| |
| static void add_qemu_ldst_label(TCGContext *s, int is_ld, MemOpIdx oi, |
| TCGType ext, |
| TCGReg datalo, TCGReg datahi, |
| TCGReg addrlo, TCGReg addrhi, |
| void *raddr, tcg_insn_unit **label_ptr) |
| { |
| TCGLabelQemuLdst *label = new_ldst_label(s); |
| |
| label->is_ld = is_ld; |
| label->oi = oi; |
| label->type = ext; |
| label->datalo_reg = datalo; |
| label->datahi_reg = datahi; |
| label->addrlo_reg = addrlo; |
| label->addrhi_reg = addrhi; |
| 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); |
| TCGReg a0 = tcg_target_call_iarg_regs[0]; |
| TCGReg a1 = tcg_target_call_iarg_regs[1]; |
| TCGReg a2 = tcg_target_call_iarg_regs[2]; |
| TCGReg a3 = tcg_target_call_iarg_regs[3]; |
| |
| /* We don't support oversize guests */ |
| if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { |
| g_assert_not_reached(); |
| } |
| |
| /* resolve label address */ |
| if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { |
| return false; |
| } |
| |
| /* call load helper */ |
| tcg_out_mov(s, TCG_TYPE_PTR, a0, TCG_AREG0); |
| tcg_out_mov(s, TCG_TYPE_PTR, a1, l->addrlo_reg); |
| tcg_out_movi(s, TCG_TYPE_PTR, a2, oi); |
| tcg_out_movi(s, TCG_TYPE_PTR, a3, (tcg_target_long)l->raddr); |
| |
| tcg_out_call_int(s, qemu_ld_helpers[opc & MO_SSIZE], false); |
| tcg_out_mov(s, (opc & MO_SIZE) == MO_64, l->datalo_reg, a0); |
| |
| tcg_out_goto(s, l->raddr); |
| return true; |
| } |
| |
| static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l) |
| { |
| MemOpIdx oi = l->oi; |
| MemOp opc = get_memop(oi); |
| MemOp s_bits = opc & MO_SIZE; |
| TCGReg a0 = tcg_target_call_iarg_regs[0]; |
| TCGReg a1 = tcg_target_call_iarg_regs[1]; |
| TCGReg a2 = tcg_target_call_iarg_regs[2]; |
| TCGReg a3 = tcg_target_call_iarg_regs[3]; |
| TCGReg a4 = tcg_target_call_iarg_regs[4]; |
| |
| /* We don't support oversize guests */ |
| if (TCG_TARGET_REG_BITS < TARGET_LONG_BITS) { |
| g_assert_not_reached(); |
| } |
| |
| /* resolve label address */ |
| if (!reloc_sbimm12(l->label_ptr[0], tcg_splitwx_to_rx(s->code_ptr))) { |
| return false; |
| } |
| |
| /* call store helper */ |
| tcg_out_mov(s, TCG_TYPE_PTR, a0, TCG_AREG0); |
| tcg_out_mov(s, TCG_TYPE_PTR, a1, l->addrlo_reg); |
| tcg_out_mov(s, TCG_TYPE_PTR, a2, l->datalo_reg); |
| switch (s_bits) { |
| case MO_8: |
| tcg_out_ext8u(s, a2, a2); |
| break; |
| case MO_16: |
| tcg_out_ext16u(s, a2, a2); |
| break; |
| default: |
| break; |
| } |
| tcg_out_movi(s, TCG_TYPE_PTR, a3, oi); |
| tcg_out_movi(s, TCG_TYPE_PTR, a4, (tcg_target_long)l->raddr); |
| |
| tcg_out_call_int(s, qemu_st_helpers[opc & MO_SIZE], false); |
| |
| tcg_out_goto(s, l->raddr); |
| return true; |
| } |
| #else |
| |
| static void tcg_out_test_alignment(TCGContext *s, bool is_ld, TCGReg addr_reg, |
| unsigned a_bits) |
| { |
| unsigned a_mask = (1 << a_bits) - 1; |
| TCGLabelQemuLdst *l = new_ldst_label(s); |
| |
| l->is_ld = is_ld; |
| l->addrlo_reg = addr_reg; |
| |
| /* We are expecting a_bits to max out at 7, so we can always use andi. */ |
| tcg_debug_assert(a_bits < 12); |
| tcg_out_opc_imm(s, OPC_ANDI, TCG_REG_TMP1, addr_reg, a_mask); |
| |
| l->label_ptr[0] = s->code_ptr; |
| tcg_out_opc_branch(s, OPC_BNE, 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_sbimm12(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 */ |
| |
| static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi, |
| TCGReg base, MemOp opc, bool is_64) |
| { |
| /* 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_imm(s, OPC_LBU, lo, base, 0); |
| break; |
| case MO_SB: |
| tcg_out_opc_imm(s, OPC_LB, lo, base, 0); |
| break; |
| case MO_UW: |
| tcg_out_opc_imm(s, OPC_LHU, lo, base, 0); |
| break; |
| case MO_SW: |
| tcg_out_opc_imm(s, OPC_LH, lo, base, 0); |
| break; |
| case MO_UL: |
| if (TCG_TARGET_REG_BITS == 64 && is_64) { |
| tcg_out_opc_imm(s, OPC_LWU, lo, base, 0); |
| break; |
| } |
| /* FALLTHRU */ |
| case MO_SL: |
| tcg_out_opc_imm(s, OPC_LW, lo, base, 0); |
| break; |
| case MO_UQ: |
| /* Prefer to load from offset 0 first, but allow for overlap. */ |
| if (TCG_TARGET_REG_BITS == 64) { |
| tcg_out_opc_imm(s, OPC_LD, lo, base, 0); |
| } else if (lo != base) { |
| tcg_out_opc_imm(s, OPC_LW, lo, base, 0); |
| tcg_out_opc_imm(s, OPC_LW, hi, base, 4); |
| } else { |
| tcg_out_opc_imm(s, OPC_LW, hi, base, 4); |
| tcg_out_opc_imm(s, OPC_LW, lo, base, 0); |
| } |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is_64) |
| { |
| TCGReg addr_regl, addr_regh __attribute__((unused)); |
| TCGReg data_regl, data_regh; |
| MemOpIdx oi; |
| MemOp opc; |
| #if defined(CONFIG_SOFTMMU) |
| tcg_insn_unit *label_ptr[1]; |
| #else |
| unsigned a_bits; |
| #endif |
| TCGReg base; |
| |
| data_regl = *args++; |
| data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0); |
| addr_regl = *args++; |
| addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0); |
| oi = *args++; |
| opc = get_memop(oi); |
| |
| #if defined(CONFIG_SOFTMMU) |
| base = tcg_out_tlb_load(s, addr_regl, addr_regh, oi, label_ptr, 1); |
| tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64); |
| add_qemu_ldst_label(s, 1, oi, |
| (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), |
| data_regl, data_regh, addr_regl, addr_regh, |
| 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 = addr_regl; |
| if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { |
| tcg_out_ext32u(s, TCG_REG_TMP0, base); |
| base = TCG_REG_TMP0; |
| } |
| if (guest_base != 0) { |
| tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP0, TCG_GUEST_BASE_REG, base); |
| base = TCG_REG_TMP0; |
| } |
| tcg_out_qemu_ld_direct(s, data_regl, data_regh, base, opc, is_64); |
| #endif |
| } |
| |
| static void tcg_out_qemu_st_direct(TCGContext *s, TCGReg lo, TCGReg hi, |
| TCGReg base, MemOp opc) |
| { |
| /* Byte swapping is left to middle-end expansion. */ |
| tcg_debug_assert((opc & MO_BSWAP) == 0); |
| |
| switch (opc & (MO_SSIZE)) { |
| case MO_8: |
| tcg_out_opc_store(s, OPC_SB, base, lo, 0); |
| break; |
| case MO_16: |
| tcg_out_opc_store(s, OPC_SH, base, lo, 0); |
| break; |
| case MO_32: |
| tcg_out_opc_store(s, OPC_SW, base, lo, 0); |
| break; |
| case MO_64: |
| if (TCG_TARGET_REG_BITS == 64) { |
| tcg_out_opc_store(s, OPC_SD, base, lo, 0); |
| } else { |
| tcg_out_opc_store(s, OPC_SW, base, lo, 0); |
| tcg_out_opc_store(s, OPC_SW, base, hi, 4); |
| } |
| break; |
| default: |
| g_assert_not_reached(); |
| } |
| } |
| |
| static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is_64) |
| { |
| TCGReg addr_regl, addr_regh __attribute__((unused)); |
| TCGReg data_regl, data_regh; |
| MemOpIdx oi; |
| MemOp opc; |
| #if defined(CONFIG_SOFTMMU) |
| tcg_insn_unit *label_ptr[1]; |
| #else |
| unsigned a_bits; |
| #endif |
| TCGReg base; |
| |
| data_regl = *args++; |
| data_regh = (TCG_TARGET_REG_BITS == 32 && is_64 ? *args++ : 0); |
| addr_regl = *args++; |
| addr_regh = (TCG_TARGET_REG_BITS < TARGET_LONG_BITS ? *args++ : 0); |
| oi = *args++; |
| opc = get_memop(oi); |
| |
| #if defined(CONFIG_SOFTMMU) |
| base = tcg_out_tlb_load(s, addr_regl, addr_regh, oi, label_ptr, 0); |
| tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc); |
| add_qemu_ldst_label(s, 0, oi, |
| (is_64 ? TCG_TYPE_I64 : TCG_TYPE_I32), |
| data_regl, data_regh, addr_regl, addr_regh, |
| 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 = addr_regl; |
| if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) { |
| tcg_out_ext32u(s, TCG_REG_TMP0, base); |
| base = TCG_REG_TMP0; |
| } |
| if (guest_base != 0) { |
| tcg_out_opc_reg(s, OPC_ADD, TCG_REG_TMP0, TCG_GUEST_BASE_REG, base); |
| base = TCG_REG_TMP0; |
| } |
| tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc); |
| #endif |
| } |
| |
| static const tcg_insn_unit *tb_ret_addr; |
| |
| static void tcg_out_exit_tb(TCGContext *s, uintptr_t a0) |
| { |
| /* 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); |
| } |
| } |
| |
| static void tcg_out_goto_tb(TCGContext *s, int which) |
| { |
| /* Direct branch will be patched by tb_target_set_jmp_target. */ |
| set_jmp_insn_offset(s, which); |
| tcg_out32(s, OPC_JAL); |
| |
| /* When branch is out of range, fall through to indirect. */ |
| tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO, |
| get_jmp_target_addr(s, which)); |
| tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_TMP0, 0); |
| set_jmp_reset_offset(s, which); |
| } |
| |
| void tb_target_set_jmp_target(const TranslationBlock *tb, int n, |
| uintptr_t jmp_rx, uintptr_t jmp_rw) |
| { |
| uintptr_t addr = tb->jmp_target_addr[n]; |
| ptrdiff_t offset = addr - jmp_rx; |
| tcg_insn_unit insn; |
| |
| /* Either directly branch, or fall through to indirect branch. */ |
| if (offset == sextreg(offset, 0, 20)) { |
| insn = encode_uj(OPC_JAL, TCG_REG_ZERO, offset); |
| } else { |
| insn = OPC_NOP; |
| } |
| qatomic_set((uint32_t *)jmp_rw, insn); |
| flush_idcache_range(jmp_rx, jmp_rw, 4); |
| } |
| |
| 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_goto_ptr: |
| tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, a0, 0); |
| break; |
| |
| case INDEX_op_br: |
| tcg_out_reloc(s, s->code_ptr, R_RISCV_JAL, arg_label(a0), 0); |
| tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, 0); |
| break; |
| |
| case INDEX_op_ld8u_i32: |
| case INDEX_op_ld8u_i64: |
| tcg_out_ldst(s, OPC_LBU, a0, a1, a2); |
| break; |
| case INDEX_op_ld8s_i32: |
| case INDEX_op_ld8s_i64: |
| tcg_out_ldst(s, OPC_LB, a0, a1, a2); |
| break; |
| case INDEX_op_ld16u_i32: |
| case INDEX_op_ld16u_i64: |
| tcg_out_ldst(s, OPC_LHU, a0, a1, a2); |
| break; |
| case INDEX_op_ld16s_i32: |
| case INDEX_op_ld16s_i64: |
| tcg_out_ldst(s, OPC_LH, a0, a1, a2); |
| break; |
| case INDEX_op_ld32u_i64: |
| tcg_out_ldst(s, OPC_LWU, a0, a1, a2); |
| break; |
| case INDEX_op_ld_i32: |
| case INDEX_op_ld32s_i64: |
| tcg_out_ldst(s, OPC_LW, a0, a1, a2); |
| break; |
| case INDEX_op_ld_i64: |
| tcg_out_ldst(s, OPC_LD, a0, a1, a2); |
| break; |
| |
| case INDEX_op_st8_i32: |
| case INDEX_op_st8_i64: |
| tcg_out_ldst(s, OPC_SB, a0, a1, a2); |
| break; |
| case INDEX_op_st16_i32: |
| case INDEX_op_st16_i64: |
| tcg_out_ldst(s, OPC_SH, a0, a1, a2); |
| break; |
| case INDEX_op_st_i32: |
| case INDEX_op_st32_i64: |
| tcg_out_ldst(s, OPC_SW, a0, a1, a2); |
| break; |
| case INDEX_op_st_i64: |
| tcg_out_ldst(s, OPC_SD, a0, a1, a2); |
| break; |
| |
| case INDEX_op_add_i32: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, a2); |
| } else { |
| tcg_out_opc_reg(s, OPC_ADDW, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_add_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_ADDI, a0, a1, a2); |
| } else { |
| tcg_out_opc_reg(s, OPC_ADD, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_sub_i32: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_ADDIW, a0, a1, -a2); |
| } else { |
| tcg_out_opc_reg(s, OPC_SUBW, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_sub_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_ADDI, a0, a1, -a2); |
| } else { |
| tcg_out_opc_reg(s, OPC_SUB, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_and_i32: |
| case INDEX_op_and_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_ANDI, a0, a1, a2); |
| } else { |
| tcg_out_opc_reg(s, OPC_AND, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_or_i32: |
| case INDEX_op_or_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_ORI, a0, a1, a2); |
| } else { |
| tcg_out_opc_reg(s, OPC_OR, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_xor_i32: |
| case INDEX_op_xor_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_XORI, a0, a1, a2); |
| } else { |
| tcg_out_opc_reg(s, OPC_XOR, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_not_i32: |
| case INDEX_op_not_i64: |
| tcg_out_opc_imm(s, OPC_XORI, a0, a1, -1); |
| break; |
| |
| case INDEX_op_neg_i32: |
| tcg_out_opc_reg(s, OPC_SUBW, a0, TCG_REG_ZERO, a1); |
| break; |
| case INDEX_op_neg_i64: |
| tcg_out_opc_reg(s, OPC_SUB, a0, TCG_REG_ZERO, a1); |
| break; |
| |
| case INDEX_op_mul_i32: |
| tcg_out_opc_reg(s, OPC_MULW, a0, a1, a2); |
| break; |
| case INDEX_op_mul_i64: |
| tcg_out_opc_reg(s, OPC_MUL, a0, a1, a2); |
| break; |
| |
| case INDEX_op_div_i32: |
| tcg_out_opc_reg(s, OPC_DIVW, a0, a1, a2); |
| break; |
| case INDEX_op_div_i64: |
| tcg_out_opc_reg(s, OPC_DIV, a0, a1, a2); |
| break; |
| |
| case INDEX_op_divu_i32: |
| tcg_out_opc_reg(s, OPC_DIVUW, a0, a1, a2); |
| break; |
| case INDEX_op_divu_i64: |
| tcg_out_opc_reg(s, OPC_DIVU, a0, a1, a2); |
| break; |
| |
| case INDEX_op_rem_i32: |
| tcg_out_opc_reg(s, OPC_REMW, a0, a1, a2); |
| break; |
| case INDEX_op_rem_i64: |
| tcg_out_opc_reg(s, OPC_REM, a0, a1, a2); |
| break; |
| |
| case INDEX_op_remu_i32: |
| tcg_out_opc_reg(s, OPC_REMUW, a0, a1, a2); |
| break; |
| case INDEX_op_remu_i64: |
| tcg_out_opc_reg(s, OPC_REMU, a0, a1, a2); |
| break; |
| |
| case INDEX_op_shl_i32: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_SLLIW, a0, a1, a2 & 0x1f); |
| } else { |
| tcg_out_opc_reg(s, OPC_SLLW, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_shl_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_SLLI, a0, a1, a2 & 0x3f); |
| } else { |
| tcg_out_opc_reg(s, OPC_SLL, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_shr_i32: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_SRLIW, a0, a1, a2 & 0x1f); |
| } else { |
| tcg_out_opc_reg(s, OPC_SRLW, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_shr_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_SRLI, a0, a1, a2 & 0x3f); |
| } else { |
| tcg_out_opc_reg(s, OPC_SRL, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_sar_i32: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_SRAIW, a0, a1, a2 & 0x1f); |
| } else { |
| tcg_out_opc_reg(s, OPC_SRAW, a0, a1, a2); |
| } |
| break; |
| case INDEX_op_sar_i64: |
| if (c2) { |
| tcg_out_opc_imm(s, OPC_SRAI, a0, a1, a2 & 0x3f); |
| } else { |
| tcg_out_opc_reg(s, OPC_SRA, a0, a1, a2); |
| } |
| break; |
| |
| case INDEX_op_add2_i32: |
| tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], |
| const_args[4], const_args[5], false, true); |
| break; |
| case INDEX_op_add2_i64: |
| tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], |
| const_args[4], const_args[5], false, false); |
| break; |
| case INDEX_op_sub2_i32: |
| tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], |
| const_args[4], const_args[5], true, true); |
| break; |
| case INDEX_op_sub2_i64: |
| tcg_out_addsub2(s, a0, a1, a2, args[3], args[4], args[5], |
| const_args[4], const_args[5], true, false); |
| 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_brcond2_i32: |
| tcg_out_brcond2(s, args[4], a0, a1, a2, args[3], arg_label(args[5])); |
| break; |
| |
| case INDEX_op_setcond_i32: |
| case INDEX_op_setcond_i64: |
| tcg_out_setcond(s, args[3], a0, a1, a2); |
| break; |
| case INDEX_op_setcond2_i32: |
| tcg_out_setcond2(s, args[5], a0, a1, a2, args[3], args[4]); |
| break; |
| |
| case INDEX_op_qemu_ld_i32: |
| tcg_out_qemu_ld(s, args, false); |
| break; |
| case INDEX_op_qemu_ld_i64: |
| tcg_out_qemu_ld(s, args, true); |
| break; |
| case INDEX_op_qemu_st_i32: |
| tcg_out_qemu_st(s, args, false); |
| break; |
| case INDEX_op_qemu_st_i64: |
| tcg_out_qemu_st(s, args, true); |
| break; |
| |
| case INDEX_op_extu_i32_i64: |
| tcg_out_ext32u(s, a0, a1); |
| break; |
| |
| case INDEX_op_extrl_i64_i32: |
| tcg_out_ext32s(s, a0, a1); |
| break; |
| |
| case INDEX_op_extrh_i64_i32: |
| tcg_out_opc_imm(s, OPC_SRAI, a0, a1, 32); |
| break; |
| |
| case INDEX_op_mulsh_i32: |
| case INDEX_op_mulsh_i64: |
| tcg_out_opc_reg(s, OPC_MULH, a0, a1, a2); |
| break; |
| |
| case INDEX_op_muluh_i32: |
| case INDEX_op_muluh_i64: |
| tcg_out_opc_reg(s, OPC_MULHU, a0, a1, a2); |
| break; |
| |
| case INDEX_op_mb: |
| tcg_out_mb(s, a0); |
| 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. */ |
| case INDEX_op_exit_tb: /* Always emitted via tcg_out_exit_tb. */ |
| case INDEX_op_goto_tb: /* Always emitted via tcg_out_goto_tb. */ |
| case INDEX_op_ext8s_i32: /* Always emitted via tcg_reg_alloc_op. */ |
| 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_ext_i32_i64: |
| 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_ld8u_i32: |
| case INDEX_op_ld8s_i32: |
| case INDEX_op_ld16u_i32: |
| case INDEX_op_ld16s_i32: |
| case INDEX_op_ld_i32: |
| case INDEX_op_not_i32: |
| case INDEX_op_neg_i32: |
| case INDEX_op_ld8u_i64: |
| case INDEX_op_ld8s_i64: |
| case INDEX_op_ld16u_i64: |
| case INDEX_op_ld16s_i64: |
| case INDEX_op_ld32s_i64: |
| case INDEX_op_ld32u_i64: |
| case INDEX_op_ld_i64: |
| case INDEX_op_not_i64: |
| case INDEX_op_neg_i64: |
| case INDEX_op_ext8u_i32: |
| case INDEX_op_ext8u_i64: |
| case INDEX_op_ext16u_i32: |
| case INDEX_op_ext16u_i64: |
| case INDEX_op_ext32u_i64: |
| case INDEX_op_extu_i32_i64: |
| case INDEX_op_ext8s_i32: |
| case INDEX_op_ext8s_i64: |
| case INDEX_op_ext16s_i32: |
| case INDEX_op_ext16s_i64: |
| case INDEX_op_ext32s_i64: |
| case INDEX_op_extrl_i64_i32: |
| case INDEX_op_extrh_i64_i32: |
| case INDEX_op_ext_i32_i64: |
| return C_O1_I1(r, r); |
| |
| case INDEX_op_st8_i32: |
| case INDEX_op_st16_i32: |
| case INDEX_op_st_i32: |
| case INDEX_op_st8_i64: |
| case INDEX_op_st16_i64: |
| case INDEX_op_st32_i64: |
| case INDEX_op_st_i64: |
| return C_O0_I2(rZ, r); |
| |
| case INDEX_op_add_i32: |
| case INDEX_op_and_i32: |
| case INDEX_op_or_i32: |
| case INDEX_op_xor_i32: |
| case INDEX_op_add_i64: |
| case INDEX_op_and_i64: |
| case INDEX_op_or_i64: |
| case INDEX_op_xor_i64: |
| return C_O1_I2(r, r, rI); |
| |
| 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_mulsh_i32: |
| case INDEX_op_muluh_i32: |
| case INDEX_op_div_i32: |
| case INDEX_op_divu_i32: |
| case INDEX_op_rem_i32: |
| case INDEX_op_remu_i32: |
| case INDEX_op_setcond_i32: |
| case INDEX_op_mul_i64: |
| case INDEX_op_mulsh_i64: |
| case INDEX_op_muluh_i64: |
| case INDEX_op_div_i64: |
| case INDEX_op_divu_i64: |
| case INDEX_op_rem_i64: |
| case INDEX_op_remu_i64: |
| case INDEX_op_setcond_i64: |
| return C_O1_I2(r, rZ, rZ); |
| |
| case INDEX_op_shl_i32: |
| case INDEX_op_shr_i32: |
| case INDEX_op_sar_i32: |
| case INDEX_op_shl_i64: |
| case INDEX_op_shr_i64: |
| case INDEX_op_sar_i64: |
| return C_O1_I2(r, r, ri); |
| |
| case INDEX_op_brcond_i32: |
| case INDEX_op_brcond_i64: |
| return C_O0_I2(rZ, rZ); |
| |
| case INDEX_op_add2_i32: |
| case INDEX_op_add2_i64: |
| case INDEX_op_sub2_i32: |
| case INDEX_op_sub2_i64: |
| return C_O2_I4(r, r, rZ, rZ, rM, rM); |
| |
| case INDEX_op_brcond2_i32: |
| return C_O0_I4(rZ, rZ, rZ, rZ); |
| |
| case INDEX_op_setcond2_i32: |
| return C_O1_I4(r, rZ, rZ, rZ, rZ); |
| |
| case INDEX_op_qemu_ld_i32: |
| return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS |
| ? C_O1_I1(r, L) : C_O1_I2(r, L, L)); |
| case INDEX_op_qemu_st_i32: |
| return (TARGET_LONG_BITS <= TCG_TARGET_REG_BITS |
| ? C_O0_I2(LZ, L) : C_O0_I3(LZ, L, L)); |
| case INDEX_op_qemu_ld_i64: |
| return (TCG_TARGET_REG_BITS == 64 ? C_O1_I1(r, L) |
| : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O2_I1(r, r, L) |
| : C_O2_I2(r, r, L, L)); |
| case INDEX_op_qemu_st_i64: |
| return (TCG_TARGET_REG_BITS == 64 ? C_O0_I2(LZ, L) |
| : TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? C_O0_I3(LZ, LZ, L) |
| : C_O0_I4(LZ, LZ, L, L)); |
| |
| 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_S10, |
| TCG_REG_S11, |
| 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_imm(s, OPC_ADDI, 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) |
| 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_imm(s, OPC_JALR, 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_imm(s, OPC_ADDI, TCG_REG_SP, TCG_REG_SP, FRAME_SIZE); |
| tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_RA, 0); |
| } |
| |
| static void tcg_target_init(TCGContext *s) |
| { |
| tcg_target_available_regs[TCG_TYPE_I32] = 0xffffffff; |
| if (TCG_TARGET_REG_BITS == 64) { |
| tcg_target_available_regs[TCG_TYPE_I64] = 0xffffffff; |
| } |
| |
| tcg_target_call_clobber_regs = -1u; |
| 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); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S10); |
| tcg_regset_reset_reg(tcg_target_call_clobber_regs, TCG_REG_S11); |
| |
| 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_GP); |
| tcg_regset_set_reg(s->reserved_regs, TCG_REG_TP); |
| } |
| |
| 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_RISCV |
| |
| 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 + 9, 12, /* DW_CFA_offset, s1, -96 */ |
| 0x80 + 18, 11, /* DW_CFA_offset, s2, -88 */ |
| 0x80 + 19, 10, /* DW_CFA_offset, s3, -80 */ |
| 0x80 + 20, 9, /* DW_CFA_offset, s4, -72 */ |
| 0x80 + 21, 8, /* DW_CFA_offset, s5, -64 */ |
| 0x80 + 22, 7, /* DW_CFA_offset, s6, -56 */ |
| 0x80 + 23, 6, /* DW_CFA_offset, s7, -48 */ |
| 0x80 + 24, 5, /* DW_CFA_offset, s8, -40 */ |
| 0x80 + 25, 4, /* DW_CFA_offset, s9, -32 */ |
| 0x80 + 26, 3, /* DW_CFA_offset, s10, -24 */ |
| 0x80 + 27, 2, /* DW_CFA_offset, s11, -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)); |
| } |
