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qemu/tcg/riscv/tcg-target.inc.c
Richard Henderson 269bd5d8f6 cpu: Move the softmmu tlb to CPUNegativeOffsetState 
We have for some time had code within the tcg backends to
handle large positive offsets from env.  This move makes
sure that need not happen.  Indeed, we are able to assert
at build time that simple offsets suffice for all hosts.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2019-06-10 07:03:42 -07:00

1918 lines
55 KiB
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/*
* 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-pool.inc.c"
#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 const int tcg_target_call_oarg_regs[] = {
TCG_REG_A0,
TCG_REG_A1,
};
#define TCG_CT_CONST_ZERO 0x100
#define TCG_CT_CONST_S12 0x200
#define TCG_CT_CONST_N12 0x400
#define TCG_CT_CONST_M12 0x800
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);
}
}
/* parse target specific constraints */
static const char *target_parse_constraint(TCGArgConstraint *ct,
const char *ct_str, TCGType type)
{
switch (*ct_str++) {
case 'r':
ct->ct |= TCG_CT_REG;
ct->u.regs = 0xffffffff;
break;
case 'L':
/* qemu_ld/qemu_st constraint */
ct->ct |= TCG_CT_REG;
ct->u.regs = 0xffffffff;
/* qemu_ld/qemu_st uses TCG_REG_TMP0 */
#if defined(CONFIG_SOFTMMU)
tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[0]);
tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[1]);
tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[2]);
tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[3]);
tcg_regset_reset_reg(ct->u.regs, tcg_target_call_iarg_regs[4]);
#endif
break;
case 'I':
ct->ct |= TCG_CT_CONST_S12;
break;
case 'N':
ct->ct |= TCG_CT_CONST_N12;
break;
case 'M':
ct->ct |= TCG_CT_CONST_M12;
break;
case 'Z':
/* we can use a zero immediate as a zero register argument. */
ct->ct |= TCG_CT_CONST_ZERO;
break;
default:
return NULL;
}
return ct_str;
}
/* test if a constant matches the constraint */
static int tcg_target_const_match(tcg_target_long val, TCGType type,
const TCGArgConstraint *arg_ct)
{
int ct = arg_ct->ct;
if (ct & TCG_CT_CONST) {
return 1;
}
if ((ct & TCG_CT_CONST_ZERO) && val == 0) {
return 1;
}
if ((ct & TCG_CT_CONST_S12) && val == sextreg(val, 0, 12)) {
return 1;
}
if ((ct & TCG_CT_CONST_N12) && -val == sextreg(-val, 0, 12)) {
return 1;
}
if ((ct & TCG_CT_CONST_M12) && val >= -0xfff && val <= 0xfff) {
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,
} 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] = encode_i(OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 0);
}
}
/*
* Relocations
*/
static bool reloc_sbimm12(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
{
intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
if (offset == sextreg(offset, 1, 12) << 1) {
code_ptr[0] |= encode_sbimm12(offset);
return true;
}
return false;
}
static bool reloc_jimm20(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
{
intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
if (offset == sextreg(offset, 1, 20) << 1) {
code_ptr[0] |= encode_ujimm20(offset);
return true;
}
return false;
}
static bool reloc_call(tcg_insn_unit *code_ptr, tcg_insn_unit *target)
{
intptr_t offset = (intptr_t)target - (intptr_t)code_ptr;
int32_t lo = sextreg(offset, 0, 12);
int32_t hi = offset - lo;
if (offset == hi + lo) {
code_ptr[0] |= encode_uimm20(hi);
code_ptr[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)
{
uint32_t insn = *code_ptr;
intptr_t diff;
bool short_jmp;
tcg_debug_assert(addend == 0);
switch (type) {
case R_RISCV_BRANCH:
diff = value - (uintptr_t)code_ptr;
short_jmp = diff == sextreg(diff, 0, 12);
if (short_jmp) {
return reloc_sbimm12(code_ptr, (tcg_insn_unit *)value);
} else {
/* Invert the condition */
insn = insn ^ (1 << 12);
/* Clear the offset */
insn &= 0x01fff07f;
/* Set the offset to the PC + 8 */
insn |= encode_sbimm12(8);
/* Move forward */
code_ptr[0] = insn;
/* Overwrite the NOP with jal x0,value */
diff = value - (uintptr_t)(code_ptr + 1);
insn = encode_uj(OPC_JAL, TCG_REG_ZERO, diff);
code_ptr[1] = insn;
return true;
}
break;
case R_RISCV_JAL:
return reloc_jimm20(code_ptr, (tcg_insn_unit *)value);
break;
case R_RISCV_CALL:
return reloc_call(code_ptr, (tcg_insn_unit *)value);
break;
default:
tcg_abort();
}
}
/*
* 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, (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_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, 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, 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_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 = offset - (uintptr_t)s->code_ptr;
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 (rl == al && rl == bl) {
tcg_out_opc_imm(s, OPC_SLTI, TCG_REG_TMP0, al, 0);
tcg_out_opc_reg(s, opc_addi, rl, al, bl);
} 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;
}
if (l->has_value) {
intptr_t diff = tcg_pcrel_diff(s, l->u.value_ptr);
if (diff == sextreg(diff, 0, 12)) {
tcg_out_opc_branch(s, op, arg1, arg2, diff);
} else {
/* Invert the conditional branch. */
tcg_out_opc_branch(s, op ^ (1 << 12), arg1, arg2, 8);
tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, diff - 4);
}
} else {
tcg_out_reloc(s, s->code_ptr, R_RISCV_BRANCH, l, 0);
tcg_out_opc_branch(s, op, arg1, arg2, 0);
/* NOP to allow patching later */
tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 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 inline void tcg_out_goto(TCGContext *s, tcg_insn_unit *target)
{
ptrdiff_t offset = tcg_pcrel_diff(s, target);
tcg_debug_assert(offset == sextreg(offset, 1, 20) << 1);
tcg_out_opc_jump(s, OPC_JAL, TCG_REG_ZERO, offset);
}
static void tcg_out_call_int(TCGContext *s, 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;
if (offset == sextreg(offset, 1, 20) << 1) {
/* short jump: -2097150 to 2097152 */
tcg_out_opc_jump(s, OPC_JAL, link, offset);
} else if (TCG_TARGET_REG_BITS == 32 ||
offset == sextreg(offset, 1, 31) << 1) {
/* 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, tcg_insn_unit *arg)
{
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)
#include "tcg-ldst.inc.c"
/* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr,
* TCGMemOpIdx oi, uintptr_t ra)
*/
static void * const qemu_ld_helpers[16] = {
[MO_UB] = helper_ret_ldub_mmu,
[MO_SB] = helper_ret_ldsb_mmu,
[MO_LEUW] = helper_le_lduw_mmu,
[MO_LESW] = helper_le_ldsw_mmu,
[MO_LEUL] = helper_le_ldul_mmu,
#if TCG_TARGET_REG_BITS == 64
[MO_LESL] = helper_le_ldsl_mmu,
#endif
[MO_LEQ] = helper_le_ldq_mmu,
[MO_BEUW] = helper_be_lduw_mmu,
[MO_BESW] = helper_be_ldsw_mmu,
[MO_BEUL] = helper_be_ldul_mmu,
#if TCG_TARGET_REG_BITS == 64
[MO_BESL] = helper_be_ldsl_mmu,
#endif
[MO_BEQ] = helper_be_ldq_mmu,
};
/* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr,
* uintxx_t val, TCGMemOpIdx oi,
* uintptr_t ra)
*/
static void * const qemu_st_helpers[16] = {
[MO_UB] = helper_ret_stb_mmu,
[MO_LEUW] = helper_le_stw_mmu,
[MO_LEUL] = helper_le_stl_mmu,
[MO_LEQ] = helper_le_stq_mmu,
[MO_BEUW] = helper_be_stw_mmu,
[MO_BEUL] = helper_be_stl_mmu,
[MO_BEQ] = helper_be_stq_mmu,
};
/* 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_tlb_load(TCGContext *s, TCGReg addrl,
TCGReg addrh, TCGMemOpIdx oi,
tcg_insn_unit **label_ptr, bool is_load)
{
TCGMemOp 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_off);
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP1, table_base, table_off);
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);
/* NOP to allow patching later */
tcg_out_opc_imm(s, OPC_ADDI, TCG_REG_ZERO, TCG_REG_ZERO, 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);
}
static void add_qemu_ldst_label(TCGContext *s, int is_ld, TCGMemOpIdx 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 = raddr;
label->label_ptr[0] = label_ptr[0];
}
static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
{
TCGMemOpIdx oi = l->oi;
TCGMemOp 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 (!patch_reloc(l->label_ptr[0], R_RISCV_BRANCH,
(intptr_t) s->code_ptr, 0)) {
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(s, qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]);
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)
{
TCGMemOpIdx oi = l->oi;
TCGMemOp opc = get_memop(oi);
TCGMemOp 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 (!patch_reloc(l->label_ptr[0], R_RISCV_BRANCH,
(intptr_t) s->code_ptr, 0)) {
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(s, qemu_st_helpers[opc & (MO_BSWAP | MO_SSIZE)]);
tcg_out_goto(s, l->raddr);
return true;
}
#endif /* CONFIG_SOFTMMU */
static void tcg_out_qemu_ld_direct(TCGContext *s, TCGReg lo, TCGReg hi,
TCGReg base, TCGMemOp opc, bool is_64)
{
const TCGMemOp bswap = opc & MO_BSWAP;
/* We don't yet handle byteswapping, assert */
g_assert(!bswap);
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_Q:
/* 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;
TCGMemOpIdx oi;
TCGMemOp opc;
#if defined(CONFIG_SOFTMMU)
tcg_insn_unit *label_ptr[1];
#endif
TCGReg base = TCG_REG_TMP0;
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)
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
if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
tcg_out_ext32u(s, base, addr_regl);
addr_regl = base;
}
if (guest_base == 0) {
tcg_out_opc_reg(s, OPC_ADD, base, addr_regl, TCG_REG_ZERO);
} else {
tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
}
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, TCGMemOp opc)
{
const TCGMemOp bswap = opc & MO_BSWAP;
/* We don't yet handle byteswapping, assert */
g_assert(!bswap);
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;
TCGMemOpIdx oi;
TCGMemOp opc;
#if defined(CONFIG_SOFTMMU)
tcg_insn_unit *label_ptr[1];
#endif
TCGReg base = TCG_REG_TMP0;
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)
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
if (TCG_TARGET_REG_BITS > TARGET_LONG_BITS) {
tcg_out_ext32u(s, base, addr_regl);
addr_regl = base;
}
if (guest_base == 0) {
tcg_out_opc_reg(s, OPC_ADD, base, addr_regl, TCG_REG_ZERO);
} else {
tcg_out_opc_reg(s, OPC_ADD, base, TCG_GUEST_BASE_REG, addr_regl);
}
tcg_out_qemu_st_direct(s, data_regl, data_regh, base, opc);
#endif
}
static tcg_insn_unit *tb_ret_addr;
static void tcg_out_op(TCGContext *s, TCGOpcode opc,
const TCGArg *args, const int *const_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, s->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:
assert(s->tb_jmp_insn_offset == 0);
/* indirect jump method */
tcg_out_ld(s, TCG_TYPE_PTR, TCG_REG_TMP0, TCG_REG_ZERO,
(uintptr_t)(s->tb_jmp_target_addr + a0));
tcg_out_opc_imm(s, OPC_JALR, TCG_REG_ZERO, TCG_REG_TMP0, 0);
set_jmp_reset_offset(s, a0);
break;
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);
} 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);
} 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);
} 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);
} 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);
} 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);
} 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_ext8u_i32:
case INDEX_op_ext8u_i64:
tcg_out_ext8u(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_ext8s_i32:
case INDEX_op_ext8s_i64:
tcg_out_ext8s(s, a0, a1);
break;
case INDEX_op_ext16s_i32:
case INDEX_op_ext16s_i64:
tcg_out_ext16s(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_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_movi_i32: /* Always emitted via tcg_out_movi. */
case INDEX_op_movi_i64:
case INDEX_op_call: /* Always emitted via tcg_out_call. */
default:
g_assert_not_reached();
}
}
static const TCGTargetOpDef *tcg_target_op_def(TCGOpcode op)
{
static const TCGTargetOpDef r
= { .args_ct_str = { "r" } };
static const TCGTargetOpDef r_r
= { .args_ct_str = { "r", "r" } };
static const TCGTargetOpDef rZ_r
= { .args_ct_str = { "rZ", "r" } };
static const TCGTargetOpDef rZ_rZ
= { .args_ct_str = { "rZ", "rZ" } };
static const TCGTargetOpDef rZ_rZ_rZ_rZ
= { .args_ct_str = { "rZ", "rZ", "rZ", "rZ" } };
static const TCGTargetOpDef r_r_ri
= { .args_ct_str = { "r", "r", "ri" } };
static const TCGTargetOpDef r_r_rI
= { .args_ct_str = { "r", "r", "rI" } };
static const TCGTargetOpDef r_rZ_rN
= { .args_ct_str = { "r", "rZ", "rN" } };
static const TCGTargetOpDef r_rZ_rZ
= { .args_ct_str = { "r", "rZ", "rZ" } };
static const TCGTargetOpDef r_rZ_rZ_rZ_rZ
= { .args_ct_str = { "r", "rZ", "rZ", "rZ", "rZ" } };
static const TCGTargetOpDef r_L
= { .args_ct_str = { "r", "L" } };
static const TCGTargetOpDef r_r_L
= { .args_ct_str = { "r", "r", "L" } };
static const TCGTargetOpDef r_L_L
= { .args_ct_str = { "r", "L", "L" } };
static const TCGTargetOpDef r_r_L_L
= { .args_ct_str = { "r", "r", "L", "L" } };
static const TCGTargetOpDef LZ_L
= { .args_ct_str = { "LZ", "L" } };
static const TCGTargetOpDef LZ_L_L
= { .args_ct_str = { "LZ", "L", "L" } };
static const TCGTargetOpDef LZ_LZ_L
= { .args_ct_str = { "LZ", "LZ", "L" } };
static const TCGTargetOpDef LZ_LZ_L_L
= { .args_ct_str = { "LZ", "LZ", "L", "L" } };
static const TCGTargetOpDef r_r_rZ_rZ_rM_rM
= { .args_ct_str = { "r", "r", "rZ", "rZ", "rM", "rM" } };
switch (op) {
case INDEX_op_goto_ptr:
return &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 &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 &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 &r_r_rI;
case INDEX_op_sub_i32:
case INDEX_op_sub_i64:
return &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 &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 &r_r_ri;
case INDEX_op_brcond_i32:
case INDEX_op_brcond_i64:
return &rZ_rZ;
case INDEX_op_add2_i32:
case INDEX_op_add2_i64:
case INDEX_op_sub2_i32:
case INDEX_op_sub2_i64:
return &r_r_rZ_rZ_rM_rM;
case INDEX_op_brcond2_i32:
return &rZ_rZ_rZ_rZ;
case INDEX_op_setcond2_i32:
return &r_rZ_rZ_rZ_rZ;
case INDEX_op_qemu_ld_i32:
return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_L : &r_L_L;
case INDEX_op_qemu_st_i32:
return TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &LZ_L : &LZ_L_L;
case INDEX_op_qemu_ld_i64:
return TCG_TARGET_REG_BITS == 64 ? &r_L
: TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &r_r_L
: &r_r_L_L;
case INDEX_op_qemu_st_i64:
return TCG_TARGET_REG_BITS == 64 ? &LZ_L
: TARGET_LONG_BITS <= TCG_TARGET_REG_BITS ? &LZ_LZ_L
: &LZ_LZ_L_L;
default:
return NULL;
}
}
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 */
s->code_gen_epilogue = s->code_ptr;
tcg_out_mov(s, TCG_TYPE_REG, TCG_REG_A0, TCG_REG_ZERO);
/* TB epilogue */
tb_ret_addr = 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(void *buf, size_t buf_size)
{
tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame));
}
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