diff options
Diffstat (limited to 'qemu/tcg/arm/tcg-target.c')
| -rw-r--r-- | qemu/tcg/arm/tcg-target.c | 2128 |
1 files changed, 2128 insertions, 0 deletions
diff --git a/qemu/tcg/arm/tcg-target.c b/qemu/tcg/arm/tcg-target.c new file mode 100644 index 000000000..ae2ec7a92 --- /dev/null +++ b/qemu/tcg/arm/tcg-target.c @@ -0,0 +1,2128 @@ +/* + * Tiny Code Generator for QEMU + * + * Copyright (c) 2008 Andrzej Zaborowski + * + * 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 "elf.h" +#include "tcg-be-ldst.h" + +/* The __ARM_ARCH define is provided by gcc 4.8. Construct it otherwise. */ +#ifndef __ARM_ARCH +# if defined(__ARM_ARCH_7__) || defined(__ARM_ARCH_7A__) \ + || defined(__ARM_ARCH_7R__) || defined(__ARM_ARCH_7M__) \ + || defined(__ARM_ARCH_7EM__) +# define __ARM_ARCH 7 +# elif defined(__ARM_ARCH_6__) || defined(__ARM_ARCH_6J__) \ + || defined(__ARM_ARCH_6Z__) || defined(__ARM_ARCH_6ZK__) \ + || defined(__ARM_ARCH_6K__) || defined(__ARM_ARCH_6T2__) +# define __ARM_ARCH 6 +# elif defined(__ARM_ARCH_5__) || defined(__ARM_ARCH_5E__) \ + || defined(__ARM_ARCH_5T__) || defined(__ARM_ARCH_5TE__) \ + || defined(__ARM_ARCH_5TEJ__) +# define __ARM_ARCH 5 +# else +# define __ARM_ARCH 4 +# endif +#endif + +static int arm_arch = __ARM_ARCH; + +#if defined(__ARM_ARCH_5T__) \ + || defined(__ARM_ARCH_5TE__) || defined(__ARM_ARCH_5TEJ__) +# define use_armv5t_instructions 1 +#else +# define use_armv5t_instructions use_armv6_instructions +#endif + +#define use_armv6_instructions (__ARM_ARCH >= 6 || arm_arch >= 6) +#define use_armv7_instructions (__ARM_ARCH >= 7 || arm_arch >= 7) + +#ifndef use_idiv_instructions +bool use_idiv_instructions; +#endif + +/* ??? Ought to think about changing CONFIG_SOFTMMU to always defined. */ +#ifdef CONFIG_SOFTMMU +# define USING_SOFTMMU 1 +#else +# define USING_SOFTMMU 0 +#endif + +#ifndef NDEBUG +static const char * const tcg_target_reg_names[TCG_TARGET_NB_REGS] = { + "%r0", + "%r1", + "%r2", + "%r3", + "%r4", + "%r5", + "%r6", + "%r7", + "%r8", + "%r9", + "%r10", + "%r11", + "%r12", + "%r13", + "%r14", + "%pc", +}; +#endif + +static const int tcg_target_reg_alloc_order[] = { + TCG_REG_R4, + TCG_REG_R5, + TCG_REG_R6, + TCG_REG_R7, + TCG_REG_R8, + TCG_REG_R9, + TCG_REG_R10, + TCG_REG_R11, + TCG_REG_R13, + TCG_REG_R0, + TCG_REG_R1, + TCG_REG_R2, + TCG_REG_R3, + TCG_REG_R12, + TCG_REG_R14, +}; + +static const int tcg_target_call_iarg_regs[4] = { + TCG_REG_R0, TCG_REG_R1, TCG_REG_R2, TCG_REG_R3 +}; +static const int tcg_target_call_oarg_regs[2] = { + TCG_REG_R0, TCG_REG_R1 +}; + +#define TCG_REG_TMP TCG_REG_R12 + +static inline void reloc_pc24(tcg_insn_unit *code_ptr, tcg_insn_unit *target) +{ + ptrdiff_t offset = (tcg_ptr_byte_diff(target, code_ptr) - 8) >> 2; + *code_ptr = (*code_ptr & ~0xffffff) | (offset & 0xffffff); +} + +static void patch_reloc(tcg_insn_unit *code_ptr, int type, + intptr_t value, intptr_t addend) +{ + assert(type == R_ARM_PC24); + assert(addend == 0); + reloc_pc24(code_ptr, (tcg_insn_unit *)value); +} + +#define TCG_CT_CONST_ARM 0x100 +#define TCG_CT_CONST_INV 0x200 +#define TCG_CT_CONST_NEG 0x400 +#define TCG_CT_CONST_ZERO 0x800 + +/* parse target specific constraints */ +static int target_parse_constraint(TCGArgConstraint *ct, const char **pct_str) +{ + const char *ct_str; + + ct_str = *pct_str; + switch (ct_str[0]) { + case 'I': + ct->ct |= TCG_CT_CONST_ARM; + break; + case 'K': + ct->ct |= TCG_CT_CONST_INV; + break; + case 'N': /* The gcc constraint letter is L, already used here. */ + ct->ct |= TCG_CT_CONST_NEG; + break; + case 'Z': + ct->ct |= TCG_CT_CONST_ZERO; + break; + + case 'r': + ct->ct |= TCG_CT_REG; + tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1); + break; + + /* qemu_ld address */ + case 'l': + ct->ct |= TCG_CT_REG; + tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1); +#ifdef CONFIG_SOFTMMU + /* r0-r2,lr will be overwritten when reading the tlb entry, + so don't use these. */ + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0); + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1); + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2); + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R14); +#endif + break; + + /* qemu_st address & data */ + case 's': + ct->ct |= TCG_CT_REG; + tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1); + /* r0-r2 will be overwritten when reading the tlb entry (softmmu only) + and r0-r1 doing the byte swapping, so don't use these. */ + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R0); + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1); +#if defined(CONFIG_SOFTMMU) + /* Avoid clashes with registers being used for helper args */ + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2); +#if TARGET_LONG_BITS == 64 + /* Avoid clashes with registers being used for helper args */ + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R3); +#endif + tcg_regset_reset_reg(ct->u.regs, TCG_REG_R14); +#endif + break; + + default: + return -1; + } + ct_str++; + *pct_str = ct_str; + + return 0; +} + +static inline uint32_t rotl(uint32_t val, int n) +{ + return (val << n) | (val >> (32 - n)); +} + +/* ARM immediates for ALU instructions are made of an unsigned 8-bit + right-rotated by an even amount between 0 and 30. */ +static inline int encode_imm(uint32_t imm) +{ + int shift; + + /* simple case, only lower bits */ + if ((imm & ~0xff) == 0) + return 0; + /* then try a simple even shift */ + shift = ctz32(imm) & ~1; + if (((imm >> shift) & ~0xff) == 0) + return 32 - shift; + /* now try harder with rotations */ + if ((rotl(imm, 2) & ~0xff) == 0) + return 2; + if ((rotl(imm, 4) & ~0xff) == 0) + return 4; + if ((rotl(imm, 6) & ~0xff) == 0) + return 6; + /* imm can't be encoded */ + return -1; +} + +static inline int check_fit_imm(uint32_t imm) +{ + return encode_imm(imm) >= 0; +} + +/* Test if a constant matches the constraint. + * TODO: define constraints for: + * + * ldr/str offset: between -0xfff and 0xfff + * ldrh/strh offset: between -0xff and 0xff + * mov operand2: values represented with x << (2 * y), x < 0x100 + * add, sub, eor...: ditto + */ +static inline int tcg_target_const_match(tcg_target_long val, TCGType type, + const TCGArgConstraint *arg_ct) +{ + int ct; + ct = arg_ct->ct; + if (ct & TCG_CT_CONST) { + return 1; + } else if ((ct & TCG_CT_CONST_ARM) && check_fit_imm(val)) { + return 1; + } else if ((ct & TCG_CT_CONST_INV) && check_fit_imm(~val)) { + return 1; + } else if ((ct & TCG_CT_CONST_NEG) && check_fit_imm(-val)) { + return 1; + } else if ((ct & TCG_CT_CONST_ZERO) && val == 0) { + return 1; + } else { + return 0; + } +} + +#define TO_CPSR (1 << 20) + +typedef enum { + ARITH_AND = 0x0 << 21, + ARITH_EOR = 0x1 << 21, + ARITH_SUB = 0x2 << 21, + ARITH_RSB = 0x3 << 21, + ARITH_ADD = 0x4 << 21, + ARITH_ADC = 0x5 << 21, + ARITH_SBC = 0x6 << 21, + ARITH_RSC = 0x7 << 21, + ARITH_TST = 0x8 << 21 | TO_CPSR, + ARITH_CMP = 0xa << 21 | TO_CPSR, + ARITH_CMN = 0xb << 21 | TO_CPSR, + ARITH_ORR = 0xc << 21, + ARITH_MOV = 0xd << 21, + ARITH_BIC = 0xe << 21, + ARITH_MVN = 0xf << 21, + + INSN_LDR_IMM = 0x04100000, + INSN_LDR_REG = 0x06100000, + INSN_STR_IMM = 0x04000000, + INSN_STR_REG = 0x06000000, + + INSN_LDRH_IMM = 0x005000b0, + INSN_LDRH_REG = 0x001000b0, + INSN_LDRSH_IMM = 0x005000f0, + INSN_LDRSH_REG = 0x001000f0, + INSN_STRH_IMM = 0x004000b0, + INSN_STRH_REG = 0x000000b0, + + INSN_LDRB_IMM = 0x04500000, + INSN_LDRB_REG = 0x06500000, + INSN_LDRSB_IMM = 0x005000d0, + INSN_LDRSB_REG = 0x001000d0, + INSN_STRB_IMM = 0x04400000, + INSN_STRB_REG = 0x06400000, + + INSN_LDRD_IMM = 0x004000d0, + INSN_LDRD_REG = 0x000000d0, + INSN_STRD_IMM = 0x004000f0, + INSN_STRD_REG = 0x000000f0, +} ARMInsn; + +#define SHIFT_IMM_LSL(im) (((im) << 7) | 0x00) +#define SHIFT_IMM_LSR(im) (((im) << 7) | 0x20) +#define SHIFT_IMM_ASR(im) (((im) << 7) | 0x40) +#define SHIFT_IMM_ROR(im) (((im) << 7) | 0x60) +#define SHIFT_REG_LSL(rs) (((rs) << 8) | 0x10) +#define SHIFT_REG_LSR(rs) (((rs) << 8) | 0x30) +#define SHIFT_REG_ASR(rs) (((rs) << 8) | 0x50) +#define SHIFT_REG_ROR(rs) (((rs) << 8) | 0x70) + +enum arm_cond_code_e { + COND_EQ = 0x0, + COND_NE = 0x1, + COND_CS = 0x2, /* Unsigned greater or equal */ + COND_CC = 0x3, /* Unsigned less than */ + COND_MI = 0x4, /* Negative */ + COND_PL = 0x5, /* Zero or greater */ + COND_VS = 0x6, /* Overflow */ + COND_VC = 0x7, /* No overflow */ + COND_HI = 0x8, /* Unsigned greater than */ + COND_LS = 0x9, /* Unsigned less or equal */ + COND_GE = 0xa, + COND_LT = 0xb, + COND_GT = 0xc, + COND_LE = 0xd, + COND_AL = 0xe, +}; + +static const uint8_t tcg_cond_to_arm_cond[] = { + [TCG_COND_EQ] = COND_EQ, + [TCG_COND_NE] = COND_NE, + [TCG_COND_LT] = COND_LT, + [TCG_COND_GE] = COND_GE, + [TCG_COND_LE] = COND_LE, + [TCG_COND_GT] = COND_GT, + /* unsigned */ + [TCG_COND_LTU] = COND_CC, + [TCG_COND_GEU] = COND_CS, + [TCG_COND_LEU] = COND_LS, + [TCG_COND_GTU] = COND_HI, +}; + +static inline void tcg_out_bx(TCGContext *s, int cond, int rn) +{ + tcg_out32(s, (cond << 28) | 0x012fff10 | rn); +} + +static inline void tcg_out_b(TCGContext *s, int cond, int32_t offset) +{ + tcg_out32(s, (cond << 28) | 0x0a000000 | + (((offset - 8) >> 2) & 0x00ffffff)); +} + +static inline void tcg_out_b_noaddr(TCGContext *s, int cond) +{ + /* We pay attention here to not modify the branch target by masking + the corresponding bytes. This ensure that caches and memory are + kept coherent during retranslation. */ + tcg_out32(s, deposit32(*s->code_ptr, 24, 8, (cond << 4) | 0x0a)); +} + +static inline void tcg_out_bl_noaddr(TCGContext *s, int cond) +{ + /* We pay attention here to not modify the branch target by masking + the corresponding bytes. This ensure that caches and memory are + kept coherent during retranslation. */ + tcg_out32(s, deposit32(*s->code_ptr, 24, 8, (cond << 4) | 0x0b)); +} + +static inline void tcg_out_bl(TCGContext *s, int cond, int32_t offset) +{ + tcg_out32(s, (cond << 28) | 0x0b000000 | + (((offset - 8) >> 2) & 0x00ffffff)); +} + +static inline void tcg_out_blx(TCGContext *s, int cond, int rn) +{ + tcg_out32(s, (cond << 28) | 0x012fff30 | rn); +} + +static inline void tcg_out_blx_imm(TCGContext *s, int32_t offset) +{ + tcg_out32(s, 0xfa000000 | ((offset & 2) << 23) | + (((offset - 8) >> 2) & 0x00ffffff)); +} + +static inline void tcg_out_dat_reg(TCGContext *s, + int cond, int opc, int rd, int rn, int rm, int shift) +{ + tcg_out32(s, (cond << 28) | (0 << 25) | opc | + (rn << 16) | (rd << 12) | shift | rm); +} + +static inline void tcg_out_nop(TCGContext *s) +{ + if (use_armv7_instructions) { + /* Architected nop introduced in v6k. */ + /* ??? This is an MSR (imm) 0,0,0 insn. Anyone know if this + also Just So Happened to do nothing on pre-v6k so that we + don't need to conditionalize it? */ + tcg_out32(s, 0xe320f000); + } else { + /* Prior to that the assembler uses mov r0, r0. */ + tcg_out_dat_reg(s, COND_AL, ARITH_MOV, 0, 0, 0, SHIFT_IMM_LSL(0)); + } +} + +static inline void tcg_out_mov_reg(TCGContext *s, int cond, int rd, int rm) +{ + /* Simple reg-reg move, optimising out the 'do nothing' case */ + if (rd != rm) { + tcg_out_dat_reg(s, cond, ARITH_MOV, rd, 0, rm, SHIFT_IMM_LSL(0)); + } +} + +static inline void tcg_out_dat_imm(TCGContext *s, + int cond, int opc, int rd, int rn, int im) +{ + tcg_out32(s, (cond << 28) | (1 << 25) | opc | + (rn << 16) | (rd << 12) | im); +} + +static void tcg_out_movi32(TCGContext *s, int cond, int rd, uint32_t arg) +{ + int rot, opc, rn; + + /* For armv7, make sure not to use movw+movt when mov/mvn would do. + Speed things up by only checking when movt would be required. + Prior to armv7, have one go at fully rotated immediates before + doing the decomposition thing below. */ + if (!use_armv7_instructions || (arg & 0xffff0000)) { + rot = encode_imm(arg); + if (rot >= 0) { + tcg_out_dat_imm(s, cond, ARITH_MOV, rd, 0, + rotl(arg, rot) | (rot << 7)); + return; + } + rot = encode_imm(~arg); + if (rot >= 0) { + tcg_out_dat_imm(s, cond, ARITH_MVN, rd, 0, + rotl(~arg, rot) | (rot << 7)); + return; + } + } + + /* Use movw + movt. */ + if (use_armv7_instructions) { + /* movw */ + tcg_out32(s, (cond << 28) | 0x03000000 | (rd << 12) + | ((arg << 4) & 0x000f0000) | (arg & 0xfff)); + if (arg & 0xffff0000) { + /* movt */ + tcg_out32(s, (cond << 28) | 0x03400000 | (rd << 12) + | ((arg >> 12) & 0x000f0000) | ((arg >> 16) & 0xfff)); + } + return; + } + + /* TODO: This is very suboptimal, we can easily have a constant + pool somewhere after all the instructions. */ + opc = ARITH_MOV; + rn = 0; + /* If we have lots of leading 1's, we can shorten the sequence by + beginning with mvn and then clearing higher bits with eor. */ + if (clz32(~arg) > clz32(arg)) { + opc = ARITH_MVN, arg = ~arg; + } + do { + int i = ctz32(arg) & ~1; + rot = ((32 - i) << 7) & 0xf00; + tcg_out_dat_imm(s, cond, opc, rd, rn, ((arg >> i) & 0xff) | rot); + arg &= ~(0xff << i); + + opc = ARITH_EOR; + rn = rd; + } while (arg); +} + +static inline void tcg_out_dat_rI(TCGContext *s, int cond, int opc, TCGArg dst, + TCGArg lhs, TCGArg rhs, int rhs_is_const) +{ + /* Emit either the reg,imm or reg,reg form of a data-processing insn. + * rhs must satisfy the "rI" constraint. + */ + if (rhs_is_const) { + int rot = encode_imm(rhs); + assert(rot >= 0); + tcg_out_dat_imm(s, cond, opc, dst, lhs, rotl(rhs, rot) | (rot << 7)); + } else { + tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0)); + } +} + +static void tcg_out_dat_rIK(TCGContext *s, int cond, int opc, int opinv, + TCGReg dst, TCGReg lhs, TCGArg rhs, + bool rhs_is_const) +{ + /* Emit either the reg,imm or reg,reg form of a data-processing insn. + * rhs must satisfy the "rIK" constraint. + */ + if (rhs_is_const) { + int rot = encode_imm(rhs); + if (rot < 0) { + rhs = ~rhs; + rot = encode_imm(rhs); + assert(rot >= 0); + opc = opinv; + } + tcg_out_dat_imm(s, cond, opc, dst, lhs, rotl(rhs, rot) | (rot << 7)); + } else { + tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0)); + } +} + +static void tcg_out_dat_rIN(TCGContext *s, int cond, int opc, int opneg, + TCGArg dst, TCGArg lhs, TCGArg rhs, + bool rhs_is_const) +{ + /* Emit either the reg,imm or reg,reg form of a data-processing insn. + * rhs must satisfy the "rIN" constraint. + */ + if (rhs_is_const) { + int rot = encode_imm(rhs); + if (rot < 0) { + rhs = -rhs; + rot = encode_imm(rhs); + assert(rot >= 0); + opc = opneg; + } + tcg_out_dat_imm(s, cond, opc, dst, lhs, rotl(rhs, rot) | (rot << 7)); + } else { + tcg_out_dat_reg(s, cond, opc, dst, lhs, rhs, SHIFT_IMM_LSL(0)); + } +} + +static inline void tcg_out_mul32(TCGContext *s, int cond, TCGReg rd, + TCGReg rn, TCGReg rm) +{ + /* if ArchVersion() < 6 && d == n then UNPREDICTABLE; */ + if (!use_armv6_instructions && rd == rn) { + if (rd == rm) { + /* rd == rn == rm; copy an input to tmp first. */ + tcg_out_mov_reg(s, cond, TCG_REG_TMP, rn); + rm = rn = TCG_REG_TMP; + } else { + rn = rm; + rm = rd; + } + } + /* mul */ + tcg_out32(s, (cond << 28) | 0x90 | (rd << 16) | (rm << 8) | rn); +} + +static inline void tcg_out_umull32(TCGContext *s, int cond, TCGReg rd0, + TCGReg rd1, TCGReg rn, TCGReg rm) +{ + /* if ArchVersion() < 6 && (dHi == n || dLo == n) then UNPREDICTABLE; */ + if (!use_armv6_instructions && (rd0 == rn || rd1 == rn)) { + if (rd0 == rm || rd1 == rm) { + tcg_out_mov_reg(s, cond, TCG_REG_TMP, rn); + rn = TCG_REG_TMP; + } else { + TCGReg t = rn; + rn = rm; + rm = t; + } + } + /* umull */ + tcg_out32(s, (cond << 28) | 0x00800090 | + (rd1 << 16) | (rd0 << 12) | (rm << 8) | rn); +} + +static inline void tcg_out_smull32(TCGContext *s, int cond, TCGReg rd0, + TCGReg rd1, TCGReg rn, TCGReg rm) +{ + /* if ArchVersion() < 6 && (dHi == n || dLo == n) then UNPREDICTABLE; */ + if (!use_armv6_instructions && (rd0 == rn || rd1 == rn)) { + if (rd0 == rm || rd1 == rm) { + tcg_out_mov_reg(s, cond, TCG_REG_TMP, rn); + rn = TCG_REG_TMP; + } else { + TCGReg t = rn; + rn = rm; + rm = t; + } + } + /* smull */ + tcg_out32(s, (cond << 28) | 0x00c00090 | + (rd1 << 16) | (rd0 << 12) | (rm << 8) | rn); +} + +static inline void tcg_out_sdiv(TCGContext *s, int cond, int rd, int rn, int rm) +{ + tcg_out32(s, 0x0710f010 | (cond << 28) | (rd << 16) | rn | (rm << 8)); +} + +static inline void tcg_out_udiv(TCGContext *s, int cond, int rd, int rn, int rm) +{ + tcg_out32(s, 0x0730f010 | (cond << 28) | (rd << 16) | rn | (rm << 8)); +} + +static inline void tcg_out_ext8s(TCGContext *s, int cond, + int rd, int rn) +{ + if (use_armv6_instructions) { + /* sxtb */ + tcg_out32(s, 0x06af0070 | (cond << 28) | (rd << 12) | rn); + } else { + tcg_out_dat_reg(s, cond, ARITH_MOV, + rd, 0, rn, SHIFT_IMM_LSL(24)); + tcg_out_dat_reg(s, cond, ARITH_MOV, + rd, 0, rd, SHIFT_IMM_ASR(24)); + } +} + +static inline void tcg_out_ext8u(TCGContext *s, int cond, + int rd, int rn) +{ + tcg_out_dat_imm(s, cond, ARITH_AND, rd, rn, 0xff); +} + +static inline void tcg_out_ext16s(TCGContext *s, int cond, + int rd, int rn) +{ + if (use_armv6_instructions) { + /* sxth */ + tcg_out32(s, 0x06bf0070 | (cond << 28) | (rd << 12) | rn); + } else { + tcg_out_dat_reg(s, cond, ARITH_MOV, + rd, 0, rn, SHIFT_IMM_LSL(16)); + tcg_out_dat_reg(s, cond, ARITH_MOV, + rd, 0, rd, SHIFT_IMM_ASR(16)); + } +} + +static inline void tcg_out_ext16u(TCGContext *s, int cond, + int rd, int rn) +{ + if (use_armv6_instructions) { + /* uxth */ + tcg_out32(s, 0x06ff0070 | (cond << 28) | (rd << 12) | rn); + } else { + tcg_out_dat_reg(s, cond, ARITH_MOV, + rd, 0, rn, SHIFT_IMM_LSL(16)); + tcg_out_dat_reg(s, cond, ARITH_MOV, + rd, 0, rd, SHIFT_IMM_LSR(16)); + } +} + +static inline void tcg_out_bswap16s(TCGContext *s, int cond, int rd, int rn) +{ + if (use_armv6_instructions) { + /* revsh */ + tcg_out32(s, 0x06ff0fb0 | (cond << 28) | (rd << 12) | rn); + } else { + tcg_out_dat_reg(s, cond, ARITH_MOV, + TCG_REG_TMP, 0, rn, SHIFT_IMM_LSL(24)); + tcg_out_dat_reg(s, cond, ARITH_MOV, + TCG_REG_TMP, 0, TCG_REG_TMP, SHIFT_IMM_ASR(16)); + tcg_out_dat_reg(s, cond, ARITH_ORR, + rd, TCG_REG_TMP, rn, SHIFT_IMM_LSR(8)); + } +} + +static inline void tcg_out_bswap16(TCGContext *s, int cond, int rd, int rn) +{ + if (use_armv6_instructions) { + /* rev16 */ + tcg_out32(s, 0x06bf0fb0 | (cond << 28) | (rd << 12) | rn); + } else { + tcg_out_dat_reg(s, cond, ARITH_MOV, + TCG_REG_TMP, 0, rn, SHIFT_IMM_LSL(24)); + tcg_out_dat_reg(s, cond, ARITH_MOV, + TCG_REG_TMP, 0, TCG_REG_TMP, SHIFT_IMM_LSR(16)); + tcg_out_dat_reg(s, cond, ARITH_ORR, + rd, TCG_REG_TMP, rn, SHIFT_IMM_LSR(8)); + } +} + +/* swap the two low bytes assuming that the two high input bytes and the + two high output bit can hold any value. */ +static inline void tcg_out_bswap16st(TCGContext *s, int cond, int rd, int rn) +{ + if (use_armv6_instructions) { + /* rev16 */ + tcg_out32(s, 0x06bf0fb0 | (cond << 28) | (rd << 12) | rn); + } else { + tcg_out_dat_reg(s, cond, ARITH_MOV, + TCG_REG_TMP, 0, rn, SHIFT_IMM_LSR(8)); + tcg_out_dat_imm(s, cond, ARITH_AND, TCG_REG_TMP, TCG_REG_TMP, 0xff); + tcg_out_dat_reg(s, cond, ARITH_ORR, + rd, TCG_REG_TMP, rn, SHIFT_IMM_LSL(8)); + } +} + +static inline void tcg_out_bswap32(TCGContext *s, int cond, int rd, int rn) +{ + if (use_armv6_instructions) { + /* rev */ + tcg_out32(s, 0x06bf0f30 | (cond << 28) | (rd << 12) | rn); + } else { + tcg_out_dat_reg(s, cond, ARITH_EOR, + TCG_REG_TMP, rn, rn, SHIFT_IMM_ROR(16)); + tcg_out_dat_imm(s, cond, ARITH_BIC, + TCG_REG_TMP, TCG_REG_TMP, 0xff | 0x800); + tcg_out_dat_reg(s, cond, ARITH_MOV, + rd, 0, rn, SHIFT_IMM_ROR(8)); + tcg_out_dat_reg(s, cond, ARITH_EOR, + rd, rd, TCG_REG_TMP, SHIFT_IMM_LSR(8)); + } +} + +bool tcg_target_deposit_valid(int ofs, int len) +{ + /* ??? Without bfi, we could improve over generic code by combining + the right-shift from a non-zero ofs with the orr. We do run into + problems when rd == rs, and the mask generated from ofs+len doesn't + fit into an immediate. We would have to be careful not to pessimize + wrt the optimizations performed on the expanded code. */ + return use_armv7_instructions; +} + +static inline void tcg_out_deposit(TCGContext *s, int cond, TCGReg rd, + TCGArg a1, int ofs, int len, bool const_a1) +{ + if (const_a1) { + /* bfi becomes bfc with rn == 15. */ + a1 = 15; + } + /* bfi/bfc */ + tcg_out32(s, 0x07c00010 | (cond << 28) | (rd << 12) | a1 + | (ofs << 7) | ((ofs + len - 1) << 16)); +} + +/* Note that this routine is used for both LDR and LDRH formats, so we do + not wish to include an immediate shift at this point. */ +static void tcg_out_memop_r(TCGContext *s, int cond, ARMInsn opc, TCGReg rt, + TCGReg rn, TCGReg rm, bool u, bool p, bool w) +{ + tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) + | (w << 21) | (rn << 16) | (rt << 12) | rm); +} + +static void tcg_out_memop_8(TCGContext *s, int cond, ARMInsn opc, TCGReg rt, + TCGReg rn, int imm8, bool p, bool w) +{ + bool u = 1; + if (imm8 < 0) { + imm8 = -imm8; + u = 0; + } + tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) | (w << 21) | + (rn << 16) | (rt << 12) | ((imm8 & 0xf0) << 4) | (imm8 & 0xf)); +} + +static void tcg_out_memop_12(TCGContext *s, int cond, ARMInsn opc, TCGReg rt, + TCGReg rn, int imm12, bool p, bool w) +{ + bool u = 1; + if (imm12 < 0) { + imm12 = -imm12; + u = 0; + } + tcg_out32(s, (cond << 28) | opc | (u << 23) | (p << 24) | (w << 21) | + (rn << 16) | (rt << 12) | imm12); +} + +static inline void tcg_out_ld32_12(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm12) +{ + tcg_out_memop_12(s, cond, INSN_LDR_IMM, rt, rn, imm12, 1, 0); +} + +static inline void tcg_out_st32_12(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm12) +{ + tcg_out_memop_12(s, cond, INSN_STR_IMM, rt, rn, imm12, 1, 0); +} + +static inline void tcg_out_ld32_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_LDR_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_st32_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_STR_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_ldrd_8(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm8) +{ + tcg_out_memop_8(s, cond, INSN_LDRD_IMM, rt, rn, imm8, 1, 0); +} + +static inline void tcg_out_ldrd_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_LDRD_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_strd_8(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm8) +{ + tcg_out_memop_8(s, cond, INSN_STRD_IMM, rt, rn, imm8, 1, 0); +} + +static inline void tcg_out_strd_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_STRD_REG, rt, rn, rm, 1, 1, 0); +} + +/* Register pre-increment with base writeback. */ +static inline void tcg_out_ld32_rwb(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_LDR_REG, rt, rn, rm, 1, 1, 1); +} + +static inline void tcg_out_st32_rwb(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_STR_REG, rt, rn, rm, 1, 1, 1); +} + +static inline void tcg_out_ld16u_8(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm8) +{ + tcg_out_memop_8(s, cond, INSN_LDRH_IMM, rt, rn, imm8, 1, 0); +} + +static inline void tcg_out_st16_8(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm8) +{ + tcg_out_memop_8(s, cond, INSN_STRH_IMM, rt, rn, imm8, 1, 0); +} + +static inline void tcg_out_ld16u_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_LDRH_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_st16_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_STRH_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_ld16s_8(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm8) +{ + tcg_out_memop_8(s, cond, INSN_LDRSH_IMM, rt, rn, imm8, 1, 0); +} + +static inline void tcg_out_ld16s_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_LDRSH_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_ld8_12(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm12) +{ + tcg_out_memop_12(s, cond, INSN_LDRB_IMM, rt, rn, imm12, 1, 0); +} + +static inline void tcg_out_st8_12(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm12) +{ + tcg_out_memop_12(s, cond, INSN_STRB_IMM, rt, rn, imm12, 1, 0); +} + +static inline void tcg_out_ld8_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_LDRB_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_st8_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_STRB_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_ld8s_8(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, int imm8) +{ + tcg_out_memop_8(s, cond, INSN_LDRSB_IMM, rt, rn, imm8, 1, 0); +} + +static inline void tcg_out_ld8s_r(TCGContext *s, int cond, TCGReg rt, + TCGReg rn, TCGReg rm) +{ + tcg_out_memop_r(s, cond, INSN_LDRSB_REG, rt, rn, rm, 1, 1, 0); +} + +static inline void tcg_out_ld32u(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xfff || offset < -0xfff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_ld32_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_ld32_12(s, cond, rd, rn, offset); +} + +static inline void tcg_out_st32(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xfff || offset < -0xfff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_st32_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_st32_12(s, cond, rd, rn, offset); +} + +static inline void tcg_out_ld16u(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xff || offset < -0xff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_ld16u_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_ld16u_8(s, cond, rd, rn, offset); +} + +static inline void tcg_out_ld16s(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xff || offset < -0xff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_ld16s_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_ld16s_8(s, cond, rd, rn, offset); +} + +static inline void tcg_out_st16(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xff || offset < -0xff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_st16_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_st16_8(s, cond, rd, rn, offset); +} + +static inline void tcg_out_ld8u(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xfff || offset < -0xfff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_ld8_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_ld8_12(s, cond, rd, rn, offset); +} + +static inline void tcg_out_ld8s(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xff || offset < -0xff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_ld8s_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_ld8s_8(s, cond, rd, rn, offset); +} + +static inline void tcg_out_st8(TCGContext *s, int cond, + int rd, int rn, int32_t offset) +{ + if (offset > 0xfff || offset < -0xfff) { + tcg_out_movi32(s, cond, TCG_REG_TMP, offset); + tcg_out_st8_r(s, cond, rd, rn, TCG_REG_TMP); + } else + tcg_out_st8_12(s, cond, rd, rn, offset); +} + +/* The _goto case is normally between TBs within the same code buffer, and + * with the code buffer limited to 16MB we wouldn't need the long case. + * But we also use it for the tail-call to the qemu_ld/st helpers, which does. + */ +static inline void tcg_out_goto(TCGContext *s, int cond, tcg_insn_unit *addr) +{ + intptr_t addri = (intptr_t)addr; + ptrdiff_t disp = tcg_pcrel_diff(s, addr); + + if ((addri & 1) == 0 && disp - 8 < 0x01fffffd && disp - 8 > -0x01fffffd) { + tcg_out_b(s, cond, disp); + return; + } + + tcg_out_movi32(s, cond, TCG_REG_TMP, addri); + if (use_armv5t_instructions) { + tcg_out_bx(s, cond, TCG_REG_TMP); + } else { + if (addri & 1) { + tcg_abort(); + } + tcg_out_mov_reg(s, cond, TCG_REG_PC, TCG_REG_TMP); + } +} + +/* The call case is mostly used for helpers - so it's not unreasonable + * for them to be beyond branch range */ +static void tcg_out_call(TCGContext *s, tcg_insn_unit *addr) +{ + intptr_t addri = (intptr_t)addr; + ptrdiff_t disp = tcg_pcrel_diff(s, addr); + + if (disp - 8 < 0x02000000 && disp - 8 >= -0x02000000) { + if (addri & 1) { + /* Use BLX if the target is in Thumb mode */ + if (!use_armv5t_instructions) { + tcg_abort(); + } + tcg_out_blx_imm(s, disp); + } else { + tcg_out_bl(s, COND_AL, disp); + } + } else if (use_armv7_instructions) { + tcg_out_movi32(s, COND_AL, TCG_REG_TMP, addri); + tcg_out_blx(s, COND_AL, TCG_REG_TMP); + } else { + tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R14, TCG_REG_PC, 4); + tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, -4); + tcg_out32(s, addri); + } +} + +static inline void tcg_out_goto_label(TCGContext *s, int cond, TCGLabel *l) +{ + if (l->has_value) { + tcg_out_goto(s, cond, l->u.value_ptr); + } else { + tcg_out_reloc(s, s->code_ptr, R_ARM_PC24, l, 0); + tcg_out_b_noaddr(s, cond); + } +} + +#ifdef CONFIG_SOFTMMU +/* helper signature: helper_ret_ld_mmu(CPUState *env, target_ulong addr, + * int mmu_idx, 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_LEUL] = helper_le_ldul_mmu, + [MO_LEQ] = helper_le_ldq_mmu, + [MO_LESW] = helper_le_ldsw_mmu, + [MO_LESL] = helper_le_ldul_mmu, + + [MO_BEUW] = helper_be_lduw_mmu, + [MO_BEUL] = helper_be_ldul_mmu, + [MO_BEQ] = helper_be_ldq_mmu, + [MO_BESW] = helper_be_ldsw_mmu, + [MO_BESL] = helper_be_ldul_mmu, +}; + +/* helper signature: helper_ret_st_mmu(CPUState *env, target_ulong addr, + * uintxx_t val, int mmu_idx, 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, +}; + +/* Helper routines for marshalling helper function arguments into + * the correct registers and stack. + * argreg is where we want to put this argument, arg is the argument itself. + * Return value is the updated argreg ready for the next call. + * Note that argreg 0..3 is real registers, 4+ on stack. + * + * We provide routines for arguments which are: immediate, 32 bit + * value in register, 16 and 8 bit values in register (which must be zero + * extended before use) and 64 bit value in a lo:hi register pair. + */ +#define DEFINE_TCG_OUT_ARG(NAME, ARGTYPE, MOV_ARG, EXT_ARG) \ +static TCGReg NAME(TCGContext *s, TCGReg argreg, ARGTYPE arg) \ +{ \ + if (argreg < 4) { \ + MOV_ARG(s, COND_AL, argreg, arg); \ + } else { \ + int ofs = (argreg - 4) * 4; \ + EXT_ARG; \ + assert(ofs + 4 <= TCG_STATIC_CALL_ARGS_SIZE); \ + tcg_out_st32_12(s, COND_AL, arg, TCG_REG_CALL_STACK, ofs); \ + } \ + return argreg + 1; \ +} + +DEFINE_TCG_OUT_ARG(tcg_out_arg_imm32, uint32_t, tcg_out_movi32, + (tcg_out_movi32(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP)) +DEFINE_TCG_OUT_ARG(tcg_out_arg_reg8, TCGReg, tcg_out_ext8u, + (tcg_out_ext8u(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP)) +DEFINE_TCG_OUT_ARG(tcg_out_arg_reg16, TCGReg, tcg_out_ext16u, + (tcg_out_ext16u(s, COND_AL, TCG_REG_TMP, arg), arg = TCG_REG_TMP)) +DEFINE_TCG_OUT_ARG(tcg_out_arg_reg32, TCGReg, tcg_out_mov_reg, ) + +static TCGReg tcg_out_arg_reg64(TCGContext *s, TCGReg argreg, + TCGReg arglo, TCGReg arghi) +{ + /* 64 bit arguments must go in even/odd register pairs + * and in 8-aligned stack slots. + */ + if (argreg & 1) { + argreg++; + } + if (use_armv6_instructions && argreg >= 4 + && (arglo & 1) == 0 && arghi == arglo + 1) { + tcg_out_strd_8(s, COND_AL, arglo, + TCG_REG_CALL_STACK, (argreg - 4) * 4); + return argreg + 2; + } else { + argreg = tcg_out_arg_reg32(s, argreg, arglo); + argreg = tcg_out_arg_reg32(s, argreg, arghi); + return argreg; + } +} + +#define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS) + +/* We're expecting to use an 8-bit immediate and to mask. */ +QEMU_BUILD_BUG_ON(CPU_TLB_BITS > 8); + +/* We're expecting to use an 8-bit immediate add + 8-bit ldrd offset. + Using the offset of the second entry in the last tlb table ensures + that we can index all of the elements of the first entry. */ +QEMU_BUILD_BUG_ON(offsetof(CPUArchState, tlb_table[NB_MMU_MODES - 1][1]) + > 0xffff); + +/* Load and compare a TLB entry, leaving the flags set. Returns the register + containing the addend of the tlb entry. Clobbers R0, R1, R2, TMP. */ + +static TCGReg tcg_out_tlb_read(TCGContext *s, TCGReg addrlo, TCGReg addrhi, + TCGMemOp s_bits, int mem_index, bool is_load) +{ + TCGReg base = TCG_AREG0; + int cmp_off = + (is_load + ? offsetof(CPUArchState, tlb_table[mem_index][0].addr_read) + : offsetof(CPUArchState, tlb_table[mem_index][0].addr_write)); + int add_off = offsetof(CPUArchState, tlb_table[mem_index][0].addend); + + /* Should generate something like the following: + * shr tmp, addrlo, #TARGET_PAGE_BITS (1) + * add r2, env, #high + * and r0, tmp, #(CPU_TLB_SIZE - 1) (2) + * add r2, r2, r0, lsl #CPU_TLB_ENTRY_BITS (3) + * ldr r0, [r2, #cmp] (4) + * tst addrlo, #s_mask + * ldr r2, [r2, #add] (5) + * cmpeq r0, tmp, lsl #TARGET_PAGE_BITS + */ + tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_TMP, + 0, addrlo, SHIFT_IMM_LSR(TARGET_PAGE_BITS)); + + /* We checked that the offset is contained within 16 bits above. */ + if (add_off > 0xfff || (use_armv6_instructions && cmp_off > 0xff)) { + tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R2, base, + (24 << 7) | (cmp_off >> 8)); + base = TCG_REG_R2; + add_off -= cmp_off & 0xff00; + cmp_off &= 0xff; + } + + tcg_out_dat_imm(s, COND_AL, ARITH_AND, + TCG_REG_R0, TCG_REG_TMP, CPU_TLB_SIZE - 1); + tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_R2, base, + TCG_REG_R0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS)); + + /* Load the tlb comparator. Use ldrd if needed and available, + but due to how the pointer needs setting up, ldm isn't useful. + Base arm5 doesn't have ldrd, but armv5te does. */ + if (use_armv6_instructions && TARGET_LONG_BITS == 64) { + tcg_out_ldrd_8(s, COND_AL, TCG_REG_R0, TCG_REG_R2, cmp_off); + } else { + tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, TCG_REG_R2, cmp_off); + if (TARGET_LONG_BITS == 64) { + tcg_out_ld32_12(s, COND_AL, TCG_REG_R1, TCG_REG_R2, cmp_off + 4); + } + } + + /* Check alignment. */ + if (s_bits) { + tcg_out_dat_imm(s, COND_AL, ARITH_TST, + 0, addrlo, (1 << s_bits) - 1); + } + + /* Load the tlb addend. */ + tcg_out_ld32_12(s, COND_AL, TCG_REG_R2, TCG_REG_R2, add_off); + + tcg_out_dat_reg(s, (s_bits ? COND_EQ : COND_AL), ARITH_CMP, 0, + TCG_REG_R0, TCG_REG_TMP, SHIFT_IMM_LSL(TARGET_PAGE_BITS)); + + if (TARGET_LONG_BITS == 64) { + tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0, + TCG_REG_R1, addrhi, SHIFT_IMM_LSL(0)); + } + + return TCG_REG_R2; +} + +/* Record the context of a call to the out of line helper code for the slow + path for a load or store, so that we can later generate the correct + helper code. */ +static void add_qemu_ldst_label(TCGContext *s, bool is_ld, TCGMemOpIdx oi, + TCGReg datalo, TCGReg datahi, TCGReg addrlo, + TCGReg addrhi, tcg_insn_unit *raddr, + tcg_insn_unit *label_ptr) +{ + TCGLabelQemuLdst *label = new_ldst_label(s); + + label->is_ld = is_ld; + label->oi = oi; + 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; +} + +static void tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) +{ + TCGReg argreg, datalo, datahi; + TCGMemOpIdx oi = lb->oi; + TCGMemOp opc = get_memop(oi); + void *func; + + reloc_pc24(lb->label_ptr[0], s->code_ptr); + + argreg = tcg_out_arg_reg32(s, TCG_REG_R0, TCG_AREG0); + if (TARGET_LONG_BITS == 64) { + argreg = tcg_out_arg_reg64(s, argreg, lb->addrlo_reg, lb->addrhi_reg); + } else { + argreg = tcg_out_arg_reg32(s, argreg, lb->addrlo_reg); + } + argreg = tcg_out_arg_imm32(s, argreg, oi); + argreg = tcg_out_arg_reg32(s, argreg, TCG_REG_R14); + + /* For armv6 we can use the canonical unsigned helpers and minimize + icache usage. For pre-armv6, use the signed helpers since we do + not have a single insn sign-extend. */ + if (use_armv6_instructions) { + func = qemu_ld_helpers[opc & (MO_BSWAP | MO_SIZE)]; + } else { + func = qemu_ld_helpers[opc & (MO_BSWAP | MO_SSIZE)]; + if (opc & MO_SIGN) { + opc = MO_UL; + } + } + tcg_out_call(s, func); + + datalo = lb->datalo_reg; + datahi = lb->datahi_reg; + switch (opc & MO_SSIZE) { + case MO_SB: + tcg_out_ext8s(s, COND_AL, datalo, TCG_REG_R0); + break; + case MO_SW: + tcg_out_ext16s(s, COND_AL, datalo, TCG_REG_R0); + break; + default: + tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0); + break; + case MO_Q: + if (datalo != TCG_REG_R1) { + tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0); + tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1); + } else if (datahi != TCG_REG_R0) { + tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1); + tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_R0); + } else { + tcg_out_mov_reg(s, COND_AL, TCG_REG_TMP, TCG_REG_R0); + tcg_out_mov_reg(s, COND_AL, datahi, TCG_REG_R1); + tcg_out_mov_reg(s, COND_AL, datalo, TCG_REG_TMP); + } + break; + } + + tcg_out_goto(s, COND_AL, lb->raddr); +} + +static void tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) +{ + TCGReg argreg, datalo, datahi; + TCGMemOpIdx oi = lb->oi; + TCGMemOp opc = get_memop(oi); + + reloc_pc24(lb->label_ptr[0], s->code_ptr); + + argreg = TCG_REG_R0; + argreg = tcg_out_arg_reg32(s, argreg, TCG_AREG0); + if (TARGET_LONG_BITS == 64) { + argreg = tcg_out_arg_reg64(s, argreg, lb->addrlo_reg, lb->addrhi_reg); + } else { + argreg = tcg_out_arg_reg32(s, argreg, lb->addrlo_reg); + } + + datalo = lb->datalo_reg; + datahi = lb->datahi_reg; + switch (opc & MO_SIZE) { + case MO_8: + argreg = tcg_out_arg_reg8(s, argreg, datalo); + break; + case MO_16: + argreg = tcg_out_arg_reg16(s, argreg, datalo); + break; + case MO_32: + default: + argreg = tcg_out_arg_reg32(s, argreg, datalo); + break; + case MO_64: + argreg = tcg_out_arg_reg64(s, argreg, datalo, datahi); + break; + } + + argreg = tcg_out_arg_imm32(s, argreg, oi); + argreg = tcg_out_arg_reg32(s, argreg, TCG_REG_R14); + + /* Tail-call to the helper, which will return to the fast path. */ + tcg_out_goto(s, COND_AL, qemu_st_helpers[opc & (MO_BSWAP | MO_SIZE)]); +} +#endif /* SOFTMMU */ + +static inline void tcg_out_qemu_ld_index(TCGContext *s, TCGMemOp opc, + TCGReg datalo, TCGReg datahi, + TCGReg addrlo, TCGReg addend) +{ + TCGMemOp bswap = opc & MO_BSWAP; + + switch (opc & MO_SSIZE) { + case MO_UB: + tcg_out_ld8_r(s, COND_AL, datalo, addrlo, addend); + break; + case MO_SB: + tcg_out_ld8s_r(s, COND_AL, datalo, addrlo, addend); + break; + case MO_UW: + tcg_out_ld16u_r(s, COND_AL, datalo, addrlo, addend); + if (bswap) { + tcg_out_bswap16(s, COND_AL, datalo, datalo); + } + break; + case MO_SW: + if (bswap) { + tcg_out_ld16u_r(s, COND_AL, datalo, addrlo, addend); + tcg_out_bswap16s(s, COND_AL, datalo, datalo); + } else { + tcg_out_ld16s_r(s, COND_AL, datalo, addrlo, addend); + } + break; + case MO_UL: + default: + tcg_out_ld32_r(s, COND_AL, datalo, addrlo, addend); + if (bswap) { + tcg_out_bswap32(s, COND_AL, datalo, datalo); + } + break; + case MO_Q: + { + TCGReg dl = (bswap ? datahi : datalo); + TCGReg dh = (bswap ? datalo : datahi); + + /* Avoid ldrd for user-only emulation, to handle unaligned. */ + if (USING_SOFTMMU && use_armv6_instructions + && (dl & 1) == 0 && dh == dl + 1) { + tcg_out_ldrd_r(s, COND_AL, dl, addrlo, addend); + } else if (dl != addend) { + tcg_out_ld32_rwb(s, COND_AL, dl, addend, addrlo); + tcg_out_ld32_12(s, COND_AL, dh, addend, 4); + } else { + tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_TMP, + addend, addrlo, SHIFT_IMM_LSL(0)); + tcg_out_ld32_12(s, COND_AL, dl, TCG_REG_TMP, 0); + tcg_out_ld32_12(s, COND_AL, dh, TCG_REG_TMP, 4); + } + if (bswap) { + tcg_out_bswap32(s, COND_AL, dl, dl); + tcg_out_bswap32(s, COND_AL, dh, dh); + } + } + break; + } +} + +static inline void tcg_out_qemu_ld_direct(TCGContext *s, TCGMemOp opc, + TCGReg datalo, TCGReg datahi, + TCGReg addrlo) +{ + TCGMemOp bswap = opc & MO_BSWAP; + + switch (opc & MO_SSIZE) { + case MO_UB: + tcg_out_ld8_12(s, COND_AL, datalo, addrlo, 0); + break; + case MO_SB: + tcg_out_ld8s_8(s, COND_AL, datalo, addrlo, 0); + break; + case MO_UW: + tcg_out_ld16u_8(s, COND_AL, datalo, addrlo, 0); + if (bswap) { + tcg_out_bswap16(s, COND_AL, datalo, datalo); + } + break; + case MO_SW: + if (bswap) { + tcg_out_ld16u_8(s, COND_AL, datalo, addrlo, 0); + tcg_out_bswap16s(s, COND_AL, datalo, datalo); + } else { + tcg_out_ld16s_8(s, COND_AL, datalo, addrlo, 0); + } + break; + case MO_UL: + default: + tcg_out_ld32_12(s, COND_AL, datalo, addrlo, 0); + if (bswap) { + tcg_out_bswap32(s, COND_AL, datalo, datalo); + } + break; + case MO_Q: + { + TCGReg dl = (bswap ? datahi : datalo); + TCGReg dh = (bswap ? datalo : datahi); + + /* Avoid ldrd for user-only emulation, to handle unaligned. */ + if (USING_SOFTMMU && use_armv6_instructions + && (dl & 1) == 0 && dh == dl + 1) { + tcg_out_ldrd_8(s, COND_AL, dl, addrlo, 0); + } else if (dl == addrlo) { + tcg_out_ld32_12(s, COND_AL, dh, addrlo, bswap ? 0 : 4); + tcg_out_ld32_12(s, COND_AL, dl, addrlo, bswap ? 4 : 0); + } else { + tcg_out_ld32_12(s, COND_AL, dl, addrlo, bswap ? 4 : 0); + tcg_out_ld32_12(s, COND_AL, dh, addrlo, bswap ? 0 : 4); + } + if (bswap) { + tcg_out_bswap32(s, COND_AL, dl, dl); + tcg_out_bswap32(s, COND_AL, dh, dh); + } + } + break; + } +} + +static void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, bool is64) +{ + TCGReg addrlo, datalo, datahi, addrhi __attribute__((unused)); + TCGMemOpIdx oi; + TCGMemOp opc; +#ifdef CONFIG_SOFTMMU + int mem_index; + TCGReg addend; + tcg_insn_unit *label_ptr; +#endif + + datalo = *args++; + datahi = (is64 ? *args++ : 0); + addrlo = *args++; + addrhi = (TARGET_LONG_BITS == 64 ? *args++ : 0); + oi = *args++; + opc = get_memop(oi); + +#ifdef CONFIG_SOFTMMU + mem_index = get_mmuidx(oi); + addend = tcg_out_tlb_read(s, addrlo, addrhi, opc & MO_SIZE, mem_index, 1); + + /* This a conditional BL only to load a pointer within this opcode into LR + for the slow path. We will not be using the value for a tail call. */ + label_ptr = s->code_ptr; + tcg_out_bl_noaddr(s, COND_NE); + + tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, addend); + + add_qemu_ldst_label(s, true, oi, datalo, datahi, addrlo, addrhi, + s->code_ptr, label_ptr); +#else /* !CONFIG_SOFTMMU */ + if (GUEST_BASE) { + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP, GUEST_BASE); + tcg_out_qemu_ld_index(s, opc, datalo, datahi, addrlo, TCG_REG_TMP); + } else { + tcg_out_qemu_ld_direct(s, opc, datalo, datahi, addrlo); + } +#endif +} + +static inline void tcg_out_qemu_st_index(TCGContext *s, int cond, TCGMemOp opc, + TCGReg datalo, TCGReg datahi, + TCGReg addrlo, TCGReg addend) +{ + TCGMemOp bswap = opc & MO_BSWAP; + + switch (opc & MO_SIZE) { + case MO_8: + tcg_out_st8_r(s, cond, datalo, addrlo, addend); + break; + case MO_16: + if (bswap) { + tcg_out_bswap16st(s, cond, TCG_REG_R0, datalo); + tcg_out_st16_r(s, cond, TCG_REG_R0, addrlo, addend); + } else { + tcg_out_st16_r(s, cond, datalo, addrlo, addend); + } + break; + case MO_32: + default: + if (bswap) { + tcg_out_bswap32(s, cond, TCG_REG_R0, datalo); + tcg_out_st32_r(s, cond, TCG_REG_R0, addrlo, addend); + } else { + tcg_out_st32_r(s, cond, datalo, addrlo, addend); + } + break; + case MO_64: + /* Avoid strd for user-only emulation, to handle unaligned. */ + if (bswap) { + tcg_out_bswap32(s, cond, TCG_REG_R0, datahi); + tcg_out_st32_rwb(s, cond, TCG_REG_R0, addend, addrlo); + tcg_out_bswap32(s, cond, TCG_REG_R0, datalo); + tcg_out_st32_12(s, cond, TCG_REG_R0, addend, 4); + } else if (USING_SOFTMMU && use_armv6_instructions + && (datalo & 1) == 0 && datahi == datalo + 1) { + tcg_out_strd_r(s, cond, datalo, addrlo, addend); + } else { + tcg_out_st32_rwb(s, cond, datalo, addend, addrlo); + tcg_out_st32_12(s, cond, datahi, addend, 4); + } + break; + } +} + +static inline void tcg_out_qemu_st_direct(TCGContext *s, TCGMemOp opc, + TCGReg datalo, TCGReg datahi, + TCGReg addrlo) +{ + TCGMemOp bswap = opc & MO_BSWAP; + + switch (opc & MO_SIZE) { + case MO_8: + tcg_out_st8_12(s, COND_AL, datalo, addrlo, 0); + break; + case MO_16: + if (bswap) { + tcg_out_bswap16st(s, COND_AL, TCG_REG_R0, datalo); + tcg_out_st16_8(s, COND_AL, TCG_REG_R0, addrlo, 0); + } else { + tcg_out_st16_8(s, COND_AL, datalo, addrlo, 0); + } + break; + case MO_32: + default: + if (bswap) { + tcg_out_bswap32(s, COND_AL, TCG_REG_R0, datalo); + tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addrlo, 0); + } else { + tcg_out_st32_12(s, COND_AL, datalo, addrlo, 0); + } + break; + case MO_64: + /* Avoid strd for user-only emulation, to handle unaligned. */ + if (bswap) { + tcg_out_bswap32(s, COND_AL, TCG_REG_R0, datahi); + tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addrlo, 0); + tcg_out_bswap32(s, COND_AL, TCG_REG_R0, datalo); + tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addrlo, 4); + } else if (USING_SOFTMMU && use_armv6_instructions + && (datalo & 1) == 0 && datahi == datalo + 1) { + tcg_out_strd_8(s, COND_AL, datalo, addrlo, 0); + } else { + tcg_out_st32_12(s, COND_AL, datalo, addrlo, 0); + tcg_out_st32_12(s, COND_AL, datahi, addrlo, 4); + } + break; + } +} + +static void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, bool is64) +{ + TCGReg addrlo, datalo, datahi, addrhi __attribute__((unused)); + TCGMemOpIdx oi; + TCGMemOp opc; +#ifdef CONFIG_SOFTMMU + int mem_index; + TCGReg addend; + tcg_insn_unit *label_ptr; +#endif + + datalo = *args++; + datahi = (is64 ? *args++ : 0); + addrlo = *args++; + addrhi = (TARGET_LONG_BITS == 64 ? *args++ : 0); + oi = *args++; + opc = get_memop(oi); + +#ifdef CONFIG_SOFTMMU + mem_index = get_mmuidx(oi); + addend = tcg_out_tlb_read(s, addrlo, addrhi, opc & MO_SIZE, mem_index, 0); + + tcg_out_qemu_st_index(s, COND_EQ, opc, datalo, datahi, addrlo, addend); + + /* The conditional call must come last, as we're going to return here. */ + label_ptr = s->code_ptr; + tcg_out_bl_noaddr(s, COND_NE); + + add_qemu_ldst_label(s, false, oi, datalo, datahi, addrlo, addrhi, + s->code_ptr, label_ptr); +#else /* !CONFIG_SOFTMMU */ + if (GUEST_BASE) { + tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_TMP, GUEST_BASE); + tcg_out_qemu_st_index(s, COND_AL, opc, datalo, + datahi, addrlo, TCG_REG_TMP); + } else { + tcg_out_qemu_st_direct(s, opc, datalo, datahi, addrlo); + } +#endif +} + +static tcg_insn_unit *tb_ret_addr; + +static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, + const TCGArg *args, const int *const_args) +{ + TCGArg a0, a1, a2, a3, a4, a5; + int c; + + switch (opc) { + case INDEX_op_exit_tb: + tcg_out_movi32(s, COND_AL, TCG_REG_R0, args[0]); + tcg_out_goto(s, COND_AL, tb_ret_addr); + break; + case INDEX_op_goto_tb: + if (s->tb_jmp_offset) { + /* Direct jump method */ + s->tb_jmp_offset[args[0]] = tcg_current_code_size(s); + tcg_out_b_noaddr(s, COND_AL); + } else { + /* Indirect jump method */ + intptr_t ptr = (intptr_t)(s->tb_next + args[0]); + tcg_out_movi32(s, COND_AL, TCG_REG_R0, ptr & ~0xfff); + tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_R0, ptr & 0xfff); + } + s->tb_next_offset[args[0]] = tcg_current_code_size(s); + break; + case INDEX_op_br: + tcg_out_goto_label(s, COND_AL, arg_label(args[0])); + break; + + case INDEX_op_ld8u_i32: + tcg_out_ld8u(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_ld8s_i32: + tcg_out_ld8s(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_ld16u_i32: + tcg_out_ld16u(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_ld16s_i32: + tcg_out_ld16s(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_ld_i32: + tcg_out_ld32u(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_st8_i32: + tcg_out_st8(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_st16_i32: + tcg_out_st16(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_st_i32: + tcg_out_st32(s, COND_AL, args[0], args[1], args[2]); + break; + + case INDEX_op_movcond_i32: + /* Constraints mean that v2 is always in the same register as dest, + * so we only need to do "if condition passed, move v1 to dest". + */ + tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, + args[1], args[2], const_args[2]); + tcg_out_dat_rIK(s, tcg_cond_to_arm_cond[args[5]], ARITH_MOV, + ARITH_MVN, args[0], 0, args[3], const_args[3]); + break; + case INDEX_op_add_i32: + tcg_out_dat_rIN(s, COND_AL, ARITH_ADD, ARITH_SUB, + args[0], args[1], args[2], const_args[2]); + break; + case INDEX_op_sub_i32: + if (const_args[1]) { + if (const_args[2]) { + tcg_out_movi32(s, COND_AL, args[0], args[1] - args[2]); + } else { + tcg_out_dat_rI(s, COND_AL, ARITH_RSB, + args[0], args[2], args[1], 1); + } + } else { + tcg_out_dat_rIN(s, COND_AL, ARITH_SUB, ARITH_ADD, + args[0], args[1], args[2], const_args[2]); + } + break; + case INDEX_op_and_i32: + tcg_out_dat_rIK(s, COND_AL, ARITH_AND, ARITH_BIC, + args[0], args[1], args[2], const_args[2]); + break; + case INDEX_op_andc_i32: + tcg_out_dat_rIK(s, COND_AL, ARITH_BIC, ARITH_AND, + args[0], args[1], args[2], const_args[2]); + break; + case INDEX_op_or_i32: + c = ARITH_ORR; + goto gen_arith; + case INDEX_op_xor_i32: + c = ARITH_EOR; + /* Fall through. */ + gen_arith: + tcg_out_dat_rI(s, COND_AL, c, args[0], args[1], args[2], const_args[2]); + break; + case INDEX_op_add2_i32: + a0 = args[0], a1 = args[1], a2 = args[2]; + a3 = args[3], a4 = args[4], a5 = args[5]; + if (a0 == a3 || (a0 == a5 && !const_args[5])) { + a0 = TCG_REG_TMP; + } + tcg_out_dat_rIN(s, COND_AL, ARITH_ADD | TO_CPSR, ARITH_SUB | TO_CPSR, + a0, a2, a4, const_args[4]); + tcg_out_dat_rIK(s, COND_AL, ARITH_ADC, ARITH_SBC, + a1, a3, a5, const_args[5]); + tcg_out_mov_reg(s, COND_AL, args[0], a0); + break; + case INDEX_op_sub2_i32: + a0 = args[0], a1 = args[1], a2 = args[2]; + a3 = args[3], a4 = args[4], a5 = args[5]; + if ((a0 == a3 && !const_args[3]) || (a0 == a5 && !const_args[5])) { + a0 = TCG_REG_TMP; + } + if (const_args[2]) { + if (const_args[4]) { + tcg_out_movi32(s, COND_AL, a0, a4); + a4 = a0; + } + tcg_out_dat_rI(s, COND_AL, ARITH_RSB | TO_CPSR, a0, a4, a2, 1); + } else { + tcg_out_dat_rIN(s, COND_AL, ARITH_SUB | TO_CPSR, + ARITH_ADD | TO_CPSR, a0, a2, a4, const_args[4]); + } + if (const_args[3]) { + if (const_args[5]) { + tcg_out_movi32(s, COND_AL, a1, a5); + a5 = a1; + } + tcg_out_dat_rI(s, COND_AL, ARITH_RSC, a1, a5, a3, 1); + } else { + tcg_out_dat_rIK(s, COND_AL, ARITH_SBC, ARITH_ADC, + a1, a3, a5, const_args[5]); + } + tcg_out_mov_reg(s, COND_AL, args[0], a0); + break; + case INDEX_op_neg_i32: + tcg_out_dat_imm(s, COND_AL, ARITH_RSB, args[0], args[1], 0); + break; + case INDEX_op_not_i32: + tcg_out_dat_reg(s, COND_AL, + ARITH_MVN, args[0], 0, args[1], SHIFT_IMM_LSL(0)); + break; + case INDEX_op_mul_i32: + tcg_out_mul32(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_mulu2_i32: + tcg_out_umull32(s, COND_AL, args[0], args[1], args[2], args[3]); + break; + case INDEX_op_muls2_i32: + tcg_out_smull32(s, COND_AL, args[0], args[1], args[2], args[3]); + break; + /* XXX: Perhaps args[2] & 0x1f is wrong */ + case INDEX_op_shl_i32: + c = const_args[2] ? + SHIFT_IMM_LSL(args[2] & 0x1f) : SHIFT_REG_LSL(args[2]); + goto gen_shift32; + case INDEX_op_shr_i32: + c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_LSR(args[2] & 0x1f) : + SHIFT_IMM_LSL(0) : SHIFT_REG_LSR(args[2]); + goto gen_shift32; + case INDEX_op_sar_i32: + c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ASR(args[2] & 0x1f) : + SHIFT_IMM_LSL(0) : SHIFT_REG_ASR(args[2]); + goto gen_shift32; + case INDEX_op_rotr_i32: + c = const_args[2] ? (args[2] & 0x1f) ? SHIFT_IMM_ROR(args[2] & 0x1f) : + SHIFT_IMM_LSL(0) : SHIFT_REG_ROR(args[2]); + /* Fall through. */ + gen_shift32: + tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], c); + break; + + case INDEX_op_rotl_i32: + if (const_args[2]) { + tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], + ((0x20 - args[2]) & 0x1f) ? + SHIFT_IMM_ROR((0x20 - args[2]) & 0x1f) : + SHIFT_IMM_LSL(0)); + } else { + tcg_out_dat_imm(s, COND_AL, ARITH_RSB, TCG_REG_TMP, args[2], 0x20); + tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], + SHIFT_REG_ROR(TCG_REG_TMP)); + } + break; + + case INDEX_op_brcond_i32: + tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, + args[0], args[1], const_args[1]); + tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[2]], + arg_label(args[3])); + break; + case INDEX_op_brcond2_i32: + /* The resulting conditions are: + * TCG_COND_EQ --> a0 == a2 && a1 == a3, + * TCG_COND_NE --> (a0 != a2 && a1 == a3) || a1 != a3, + * TCG_COND_LT(U) --> (a0 < a2 && a1 == a3) || a1 < a3, + * TCG_COND_GE(U) --> (a0 >= a2 && a1 == a3) || (a1 >= a3 && a1 != a3), + * TCG_COND_LE(U) --> (a0 <= a2 && a1 == a3) || (a1 <= a3 && a1 != a3), + * TCG_COND_GT(U) --> (a0 > a2 && a1 == a3) || a1 > a3, + */ + tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, + args[1], args[3], const_args[3]); + tcg_out_dat_rIN(s, COND_EQ, ARITH_CMP, ARITH_CMN, 0, + args[0], args[2], const_args[2]); + tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[4]], + arg_label(args[5])); + break; + case INDEX_op_setcond_i32: + tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, + args[1], args[2], const_args[2]); + tcg_out_dat_imm(s, tcg_cond_to_arm_cond[args[3]], + ARITH_MOV, args[0], 0, 1); + tcg_out_dat_imm(s, tcg_cond_to_arm_cond[tcg_invert_cond(args[3])], + ARITH_MOV, args[0], 0, 0); + break; + case INDEX_op_setcond2_i32: + /* See brcond2_i32 comment */ + tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0, + args[2], args[4], const_args[4]); + tcg_out_dat_rIN(s, COND_EQ, ARITH_CMP, ARITH_CMN, 0, + args[1], args[3], const_args[3]); + tcg_out_dat_imm(s, tcg_cond_to_arm_cond[args[5]], + ARITH_MOV, args[0], 0, 1); + tcg_out_dat_imm(s, tcg_cond_to_arm_cond[tcg_invert_cond(args[5])], + ARITH_MOV, args[0], 0, 0); + break; + + case INDEX_op_qemu_ld_i32: + tcg_out_qemu_ld(s, args, 0); + break; + case INDEX_op_qemu_ld_i64: + tcg_out_qemu_ld(s, args, 1); + break; + case INDEX_op_qemu_st_i32: + tcg_out_qemu_st(s, args, 0); + break; + case INDEX_op_qemu_st_i64: + tcg_out_qemu_st(s, args, 1); + break; + + case INDEX_op_bswap16_i32: + tcg_out_bswap16(s, COND_AL, args[0], args[1]); + break; + case INDEX_op_bswap32_i32: + tcg_out_bswap32(s, COND_AL, args[0], args[1]); + break; + + case INDEX_op_ext8s_i32: + tcg_out_ext8s(s, COND_AL, args[0], args[1]); + break; + case INDEX_op_ext16s_i32: + tcg_out_ext16s(s, COND_AL, args[0], args[1]); + break; + case INDEX_op_ext16u_i32: + tcg_out_ext16u(s, COND_AL, args[0], args[1]); + break; + + case INDEX_op_deposit_i32: + tcg_out_deposit(s, COND_AL, args[0], args[2], + args[3], args[4], const_args[2]); + break; + + case INDEX_op_div_i32: + tcg_out_sdiv(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_divu_i32: + tcg_out_udiv(s, COND_AL, args[0], args[1], args[2]); + break; + + case INDEX_op_mov_i32: /* Always emitted via tcg_out_mov. */ + case INDEX_op_movi_i32: /* Always emitted via tcg_out_movi. */ + case INDEX_op_call: /* Always emitted via tcg_out_call. */ + default: + tcg_abort(); + } +} + +static const TCGTargetOpDef arm_op_defs[] = { + { INDEX_op_exit_tb, { } }, + { INDEX_op_goto_tb, { } }, + { INDEX_op_br, { } }, + + { INDEX_op_ld8u_i32, { "r", "r" } }, + { INDEX_op_ld8s_i32, { "r", "r" } }, + { INDEX_op_ld16u_i32, { "r", "r" } }, + { INDEX_op_ld16s_i32, { "r", "r" } }, + { INDEX_op_ld_i32, { "r", "r" } }, + { INDEX_op_st8_i32, { "r", "r" } }, + { INDEX_op_st16_i32, { "r", "r" } }, + { INDEX_op_st_i32, { "r", "r" } }, + + /* TODO: "r", "r", "ri" */ + { INDEX_op_add_i32, { "r", "r", "rIN" } }, + { INDEX_op_sub_i32, { "r", "rI", "rIN" } }, + { INDEX_op_mul_i32, { "r", "r", "r" } }, + { INDEX_op_mulu2_i32, { "r", "r", "r", "r" } }, + { INDEX_op_muls2_i32, { "r", "r", "r", "r" } }, + { INDEX_op_and_i32, { "r", "r", "rIK" } }, + { INDEX_op_andc_i32, { "r", "r", "rIK" } }, + { INDEX_op_or_i32, { "r", "r", "rI" } }, + { INDEX_op_xor_i32, { "r", "r", "rI" } }, + { INDEX_op_neg_i32, { "r", "r" } }, + { INDEX_op_not_i32, { "r", "r" } }, + + { INDEX_op_shl_i32, { "r", "r", "ri" } }, + { INDEX_op_shr_i32, { "r", "r", "ri" } }, + { INDEX_op_sar_i32, { "r", "r", "ri" } }, + { INDEX_op_rotl_i32, { "r", "r", "ri" } }, + { INDEX_op_rotr_i32, { "r", "r", "ri" } }, + + { INDEX_op_brcond_i32, { "r", "rIN" } }, + { INDEX_op_setcond_i32, { "r", "r", "rIN" } }, + { INDEX_op_movcond_i32, { "r", "r", "rIN", "rIK", "0" } }, + + { INDEX_op_add2_i32, { "r", "r", "r", "r", "rIN", "rIK" } }, + { INDEX_op_sub2_i32, { "r", "r", "rI", "rI", "rIN", "rIK" } }, + { INDEX_op_brcond2_i32, { "r", "r", "rIN", "rIN" } }, + { INDEX_op_setcond2_i32, { "r", "r", "r", "rIN", "rIN" } }, + +#if TARGET_LONG_BITS == 32 + { INDEX_op_qemu_ld_i32, { "r", "l" } }, + { INDEX_op_qemu_ld_i64, { "r", "r", "l" } }, + { INDEX_op_qemu_st_i32, { "s", "s" } }, + { INDEX_op_qemu_st_i64, { "s", "s", "s" } }, +#else + { INDEX_op_qemu_ld_i32, { "r", "l", "l" } }, + { INDEX_op_qemu_ld_i64, { "r", "r", "l", "l" } }, + { INDEX_op_qemu_st_i32, { "s", "s", "s" } }, + { INDEX_op_qemu_st_i64, { "s", "s", "s", "s" } }, +#endif + + { INDEX_op_bswap16_i32, { "r", "r" } }, + { INDEX_op_bswap32_i32, { "r", "r" } }, + + { INDEX_op_ext8s_i32, { "r", "r" } }, + { INDEX_op_ext16s_i32, { "r", "r" } }, + { INDEX_op_ext16u_i32, { "r", "r" } }, + + { INDEX_op_deposit_i32, { "r", "0", "rZ" } }, + + { INDEX_op_div_i32, { "r", "r", "r" } }, + { INDEX_op_divu_i32, { "r", "r", "r" } }, + + { -1 }, +}; + +static void tcg_target_init(TCGContext *s) +{ + /* Only probe for the platform and capabilities if we havn't already + determined maximum values at compile time. */ +#ifndef use_idiv_instructions + { + unsigned long hwcap = qemu_getauxval(AT_HWCAP); + use_idiv_instructions = (hwcap & HWCAP_ARM_IDIVA) != 0; + } +#endif + if (__ARM_ARCH < 7) { + const char *pl = (const char *)qemu_getauxval(AT_PLATFORM); + if (pl != NULL && pl[0] == 'v' && pl[1] >= '4' && pl[1] <= '9') { + arm_arch = pl[1] - '0'; + } + } + + tcg_regset_set32(tcg_target_available_regs[TCG_TYPE_I32], 0, 0xffff); + tcg_regset_set32(tcg_target_call_clobber_regs, 0, + (1 << TCG_REG_R0) | + (1 << TCG_REG_R1) | + (1 << TCG_REG_R2) | + (1 << TCG_REG_R3) | + (1 << TCG_REG_R12) | + (1 << TCG_REG_R14)); + + tcg_regset_clear(s->reserved_regs); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_CALL_STACK); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_TMP); + tcg_regset_set_reg(s->reserved_regs, TCG_REG_PC); + + tcg_add_target_add_op_defs(arm_op_defs); +} + +static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, + TCGReg arg1, intptr_t arg2) +{ + tcg_out_ld32u(s, COND_AL, arg, arg1, arg2); +} + +static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, + TCGReg arg1, intptr_t arg2) +{ + tcg_out_st32(s, COND_AL, arg, arg1, arg2); +} + +static inline void tcg_out_mov(TCGContext *s, TCGType type, + TCGReg ret, TCGReg arg) +{ + tcg_out_dat_reg(s, COND_AL, ARITH_MOV, ret, 0, arg, SHIFT_IMM_LSL(0)); +} + +static inline void tcg_out_movi(TCGContext *s, TCGType type, + TCGReg ret, tcg_target_long arg) +{ + tcg_out_movi32(s, COND_AL, ret, arg); +} + +/* Compute frame size via macros, to share between tcg_target_qemu_prologue + and tcg_register_jit. */ + +#define PUSH_SIZE ((11 - 4 + 1 + 1) * sizeof(tcg_target_long)) + +#define FRAME_SIZE \ + ((PUSH_SIZE \ + + TCG_STATIC_CALL_ARGS_SIZE \ + + CPU_TEMP_BUF_NLONGS * sizeof(long) \ + + TCG_TARGET_STACK_ALIGN - 1) \ + & -TCG_TARGET_STACK_ALIGN) + +static void tcg_target_qemu_prologue(TCGContext *s) +{ + int stack_addend; + + /* Calling convention requires us to save r4-r11 and lr. */ + /* stmdb sp!, { r4 - r11, lr } */ + tcg_out32(s, (COND_AL << 28) | 0x092d4ff0); + + /* Reserve callee argument and tcg temp space. */ + stack_addend = FRAME_SIZE - PUSH_SIZE; + + tcg_out_dat_rI(s, COND_AL, ARITH_SUB, TCG_REG_CALL_STACK, + TCG_REG_CALL_STACK, stack_addend, 1); + tcg_set_frame(s, TCG_REG_CALL_STACK, TCG_STATIC_CALL_ARGS_SIZE, + CPU_TEMP_BUF_NLONGS * sizeof(long)); + + tcg_out_mov(s, TCG_TYPE_PTR, TCG_AREG0, tcg_target_call_iarg_regs[0]); + + tcg_out_bx(s, COND_AL, tcg_target_call_iarg_regs[1]); + tb_ret_addr = s->code_ptr; + + /* Epilogue. We branch here via tb_ret_addr. */ + tcg_out_dat_rI(s, COND_AL, ARITH_ADD, TCG_REG_CALL_STACK, + TCG_REG_CALL_STACK, stack_addend, 1); + + /* ldmia sp!, { r4 - r11, pc } */ + tcg_out32(s, (COND_AL << 28) | 0x08bd8ff0); +} + +typedef struct { + DebugFrameHeader h; + uint8_t fde_def_cfa[4]; + uint8_t fde_reg_ofs[18]; +} DebugFrame; + +#define ELF_HOST_MACHINE EM_ARM + +/* We're expecting a 2 byte uleb128 encoded value. */ +QEMU_BUILD_BUG_ON(FRAME_SIZE >= (1 << 14)); + +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 = 0x7c, /* sleb128 -4 */ + .h.cie.return_column = 14, + + /* Total FDE size does not include the "len" member. */ + .h.fde.len = sizeof(DebugFrame) - offsetof(DebugFrame, h.fde.cie_offset), + + .fde_def_cfa = { + 12, 13, /* DW_CFA_def_cfa sp, ... */ + (FRAME_SIZE & 0x7f) | 0x80, /* ... uleb128 FRAME_SIZE */ + (FRAME_SIZE >> 7) + }, + .fde_reg_ofs = { + /* The following must match the stmdb in the prologue. */ + 0x8e, 1, /* DW_CFA_offset, lr, -4 */ + 0x8b, 2, /* DW_CFA_offset, r11, -8 */ + 0x8a, 3, /* DW_CFA_offset, r10, -12 */ + 0x89, 4, /* DW_CFA_offset, r9, -16 */ + 0x88, 5, /* DW_CFA_offset, r8, -20 */ + 0x87, 6, /* DW_CFA_offset, r7, -24 */ + 0x86, 7, /* DW_CFA_offset, r6, -28 */ + 0x85, 8, /* DW_CFA_offset, r5, -32 */ + 0x84, 9, /* DW_CFA_offset, r4, -36 */ + } +}; + +void tcg_register_jit(void *buf, size_t buf_size) +{ + tcg_register_jit_int(buf, buf_size, &debug_frame, sizeof(debug_frame)); +} |