/* * 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-pool.inc.c" int arm_arch = __ARM_ARCH; #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 #ifdef CONFIG_DEBUG_TCG 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 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, }; #define TO_CPSR (1 << 20) #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) 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_CLZ = 0x016f0f10, INSN_RBIT = 0x06ff0f30, 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, INSN_DMB_ISH = 0xf57ff05b, INSN_DMB_MCR = 0xee070fba, /* 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? */ INSN_NOP_v6k = 0xe320f000, /* Otherwise the assembler uses mov r0,r0 */ INSN_NOP_v4 = (COND_AL << 28) | ARITH_MOV, } ARMInsn; #define INSN_NOP (use_armv7_instructions ? INSN_NOP_v6k : INSN_NOP_v4) 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 bool reloc_pc24(tcg_insn_unit *code_ptr, tcg_insn_unit *target) { ptrdiff_t offset = (tcg_ptr_byte_diff(target, code_ptr) - 8) >> 2; if (offset == sextract32(offset, 0, 24)) { *code_ptr = (*code_ptr & ~0xffffff) | (offset & 0xffffff); return true; } return false; } static inline bool reloc_pc13(tcg_insn_unit *code_ptr, tcg_insn_unit *target) { ptrdiff_t offset = tcg_ptr_byte_diff(target, code_ptr) - 8; if (offset >= -0xfff && offset <= 0xfff) { tcg_insn_unit insn = *code_ptr; bool u = (offset >= 0); if (!u) { offset = -offset; } insn = deposit32(insn, 23, 1, u); insn = deposit32(insn, 0, 12, offset); *code_ptr = insn; return true; } return false; } static bool patch_reloc(tcg_insn_unit *code_ptr, int type, intptr_t value, intptr_t addend) { tcg_debug_assert(addend == 0); if (type == R_ARM_PC24) { return reloc_pc24(code_ptr, (tcg_insn_unit *)value); } else if (type == R_ARM_PC13) { return reloc_pc13(code_ptr, (tcg_insn_unit *)value); } else { g_assert_not_reached(); } } #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 const char *target_parse_constraint(TCGArgConstraint *ct, const char *ct_str, TCGType type) { switch (*ct_str++) { 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; ct->u.regs = 0xffff; break; /* qemu_ld address */ case 'l': ct->ct |= TCG_CT_REG; ct->u.regs = 0xffff; #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_R3); tcg_regset_reset_reg(ct->u.regs, TCG_REG_R14); #endif break; /* qemu_st address & data */ case 's': ct->ct |= TCG_CT_REG; ct->u.regs = 0xffff; /* 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 NULL; } return ct_str; } 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; } } 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_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) { tcg_out32(s, INSN_NOP); } 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_bx(TCGContext *s, int cond, TCGReg rn) { /* Unless the C portion of QEMU is compiled as thumb, we don't actually need true BX semantics; merely a branch to an address held in a register. */ if (use_armv5t_instructions) { tcg_out32(s, (cond << 28) | 0x012fff10 | rn); } else { tcg_out_mov_reg(s, cond, TCG_REG_PC, rn); } } 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); } /* 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_ldrd_rwb(TCGContext *s, int cond, TCGReg rt, TCGReg rn, TCGReg rm) { tcg_out_memop_r(s, cond, INSN_LDRD_REG, rt, rn, rm, 1, 1, 1); } 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 void tcg_out_movi_pool(TCGContext *s, int cond, int rd, uint32_t arg) { new_pool_label(s, arg, R_ARM_PC13, s->code_ptr, 0); tcg_out_ld32_12(s, cond, rd, TCG_REG_PC, 0); } static void tcg_out_movi32(TCGContext *s, int cond, int rd, uint32_t arg) { int rot, diff, opc, sh1, sh2; uint32_t tt0, tt1, tt2; /* Check a single MOV/MVN before anything else. */ 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; } /* Check for a pc-relative address. This will usually be the TB, or within the TB, which is immediately before the code block. */ diff = arg - ((intptr_t)s->code_ptr + 8); if (diff >= 0) { rot = encode_imm(diff); if (rot >= 0) { tcg_out_dat_imm(s, cond, ARITH_ADD, rd, TCG_REG_PC, rotl(diff, rot) | (rot << 7)); return; } } else { rot = encode_imm(-diff); if (rot >= 0) { tcg_out_dat_imm(s, cond, ARITH_SUB, rd, TCG_REG_PC, rotl(-diff, 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; } /* Look for sequences of two insns. If we have lots of 1's, we can shorten the sequence by beginning with mvn and then clearing higher bits with eor. */ tt0 = arg; opc = ARITH_MOV; if (ctpop32(arg) > 16) { tt0 = ~arg; opc = ARITH_MVN; } sh1 = ctz32(tt0) & ~1; tt1 = tt0 & ~(0xff << sh1); sh2 = ctz32(tt1) & ~1; tt2 = tt1 & ~(0xff << sh2); if (tt2 == 0) { rot = ((32 - sh1) << 7) & 0xf00; tcg_out_dat_imm(s, cond, opc, rd, 0, ((tt0 >> sh1) & 0xff) | rot); rot = ((32 - sh2) << 7) & 0xf00; tcg_out_dat_imm(s, cond, ARITH_EOR, rd, rd, ((tt0 >> sh2) & 0xff) | rot); return; } /* Otherwise, drop it into the constant pool. */ tcg_out_movi_pool(s, cond, rd, 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); tcg_debug_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); tcg_debug_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); tcg_debug_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)); } } 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)); } static inline void tcg_out_extract(TCGContext *s, int cond, TCGReg rd, TCGArg a1, int ofs, int len) { /* ubfx */ tcg_out32(s, 0x07e00050 | (cond << 28) | (rd << 12) | a1 | (ofs << 7) | ((len - 1) << 16)); } static inline void tcg_out_sextract(TCGContext *s, int cond, TCGReg rd, TCGArg a1, int ofs, int len) { /* sbfx */ tcg_out32(s, 0x07a00050 | (cond << 28) | (rd << 12) | a1 | (ofs << 7) | ((len - 1) << 16)); } 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 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_movi_pool(s, cond, TCG_REG_PC, addri); } /* 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 { /* ??? Know that movi_pool emits exactly 1 insn. */ tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R14, TCG_REG_PC, 0); tcg_out_movi_pool(s, COND_AL, TCG_REG_PC, 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(s, cond, 0); } } static inline void tcg_out_mb(TCGContext *s, TCGArg a0) { if (use_armv7_instructions) { tcg_out32(s, INSN_DMB_ISH); } else if (use_armv6_instructions) { tcg_out32(s, INSN_DMB_MCR); } } static TCGCond tcg_out_cmp2(TCGContext *s, const TCGArg *args, const int *const_args) { TCGReg al = args[0]; TCGReg ah = args[1]; TCGArg bl = args[2]; TCGArg bh = args[3]; TCGCond cond = args[4]; int const_bl = const_args[2]; int const_bh = const_args[3]; switch (cond) { case TCG_COND_EQ: case TCG_COND_NE: case TCG_COND_LTU: case TCG_COND_LEU: case TCG_COND_GTU: case TCG_COND_GEU: /* We perform a conditional comparision. If the high half is equal, then overwrite the flags with the comparison of the low half. The resulting flags cover the whole. */ tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 0, ah, bh, const_bh); tcg_out_dat_rI(s, COND_EQ, ARITH_CMP, 0, al, bl, const_bl); return cond; case TCG_COND_LT: case TCG_COND_GE: /* We perform a double-word subtraction and examine the result. We do not actually need the result of the subtract, so the low part "subtract" is a compare. For the high half we have no choice but to compute into a temporary. */ tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 0, al, bl, const_bl); tcg_out_dat_rI(s, COND_AL, ARITH_SBC | TO_CPSR, TCG_REG_TMP, ah, bh, const_bh); return cond; case TCG_COND_LE: case TCG_COND_GT: /* Similar, but with swapped arguments, via reversed subtract. */ tcg_out_dat_rI(s, COND_AL, ARITH_RSB | TO_CPSR, TCG_REG_TMP, al, bl, const_bl); tcg_out_dat_rI(s, COND_AL, ARITH_RSC | TO_CPSR, TCG_REG_TMP, ah, bh, const_bh); return tcg_swap_cond(cond); default: g_assert_not_reached(); } } #ifdef CONFIG_SOFTMMU #include "tcg-ldst.inc.c" /* 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; \ tcg_debug_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 expect to use an 9-bit sign-magnitude negative offset from ENV. */ QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) > 0); QEMU_BUILD_BUG_ON(TLB_MASK_TABLE_OFS(0) < -256); /* These offsets are built into the LDRD below. */ QEMU_BUILD_BUG_ON(offsetof(CPUTLBDescFast, mask) != 0); QEMU_BUILD_BUG_ON(offsetof(CPUTLBDescFast, table) != 4); /* 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 opc, int mem_index, bool is_load) { int cmp_off = (is_load ? offsetof(CPUTLBEntry, addr_read) : offsetof(CPUTLBEntry, addr_write)); int fast_off = TLB_MASK_TABLE_OFS(mem_index); int mask_off = fast_off + offsetof(CPUTLBDescFast, mask); int table_off = fast_off + offsetof(CPUTLBDescFast, table); unsigned s_bits = opc & MO_SIZE; unsigned a_bits = get_alignment_bits(opc); /* * We don't support inline unaligned acceses, but we can easily * support overalignment checks. */ if (a_bits < s_bits) { a_bits = s_bits; } /* Load env_tlb(env)->f[mmu_idx].{mask,table} into {r0,r1}. */ if (use_armv6_instructions) { tcg_out_ldrd_8(s, COND_AL, TCG_REG_R0, TCG_AREG0, fast_off); } else { tcg_out_ld(s, TCG_TYPE_I32, TCG_REG_R0, TCG_AREG0, mask_off); tcg_out_ld(s, TCG_TYPE_I32, TCG_REG_R1, TCG_AREG0, table_off); } /* Extract the tlb index from the address into R0. */ tcg_out_dat_reg(s, COND_AL, ARITH_AND, TCG_REG_R0, TCG_REG_R0, addrlo, SHIFT_IMM_LSR(TARGET_PAGE_BITS - CPU_TLB_ENTRY_BITS)); /* * Add the tlb_table pointer, creating the CPUTLBEntry address in R1. * Load the tlb comparator into R2/R3 and the fast path addend into R1. */ if (cmp_off == 0) { if (use_armv6_instructions && TARGET_LONG_BITS == 64) { tcg_out_ldrd_rwb(s, COND_AL, TCG_REG_R2, TCG_REG_R1, TCG_REG_R0); } else { tcg_out_ld32_rwb(s, COND_AL, TCG_REG_R2, TCG_REG_R1, TCG_REG_R0); } } else { tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_R1, TCG_REG_R1, TCG_REG_R0, 0); if (use_armv6_instructions && TARGET_LONG_BITS == 64) { tcg_out_ldrd_8(s, COND_AL, TCG_REG_R2, TCG_REG_R1, cmp_off); } else { tcg_out_ld32_12(s, COND_AL, TCG_REG_R2, TCG_REG_R1, cmp_off); } } if (!use_armv6_instructions && TARGET_LONG_BITS == 64) { tcg_out_ld32_12(s, COND_AL, TCG_REG_R3, TCG_REG_R1, cmp_off + 4); } /* Load the tlb addend. */ tcg_out_ld32_12(s, COND_AL, TCG_REG_R1, TCG_REG_R1, offsetof(CPUTLBEntry, addend)); /* * Check alignment, check comparators. * Do this in no more than 3 insns. Use MOVW for v7, if possible, * to reduce the number of sequential conditional instructions. * Almost all guests have at least 4k pages, which means that we need * to clear at least 9 bits even for an 8-byte memory, which means it * isn't worth checking for an immediate operand for BIC. */ if (use_armv7_instructions && TARGET_PAGE_BITS <= 16) { tcg_target_ulong mask = ~(TARGET_PAGE_MASK | ((1 << a_bits) - 1)); tcg_out_movi32(s, COND_AL, TCG_REG_TMP, mask); tcg_out_dat_reg(s, COND_AL, ARITH_BIC, TCG_REG_TMP, addrlo, TCG_REG_TMP, 0); tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0, TCG_REG_R2, TCG_REG_TMP, 0); } else { if (a_bits) { tcg_out_dat_imm(s, COND_AL, ARITH_TST, 0, addrlo, (1 << a_bits) - 1); } tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_TMP, 0, addrlo, SHIFT_IMM_LSR(TARGET_PAGE_BITS)); tcg_out_dat_reg(s, (a_bits ? COND_EQ : COND_AL), ARITH_CMP, 0, TCG_REG_R2, 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_R3, addrhi, 0); } return TCG_REG_R1; } /* 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 bool 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; if (!reloc_pc24(lb->label_ptr[0], s->code_ptr)) { return false; } 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); return true; } static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *lb) { TCGReg argreg, datalo, datahi; TCGMemOpIdx oi = lb->oi; TCGMemOp opc = get_memop(oi); if (!reloc_pc24(lb->label_ptr[0], s->code_ptr)) { return false; } 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)]); return true; } #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, 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(s, COND_NE, 0); 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, 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(s, COND_NE, 0); 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: /* Reuse the zeroing that exists for goto_ptr. */ a0 = args[0]; if (a0 == 0) { tcg_out_goto(s, COND_AL, s->code_gen_epilogue); } else { 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: { /* Indirect jump method */ intptr_t ptr, dif, dil; TCGReg base = TCG_REG_PC; tcg_debug_assert(s->tb_jmp_insn_offset == 0); ptr = (intptr_t)(s->tb_jmp_target_addr + args[0]); dif = ptr - ((intptr_t)s->code_ptr + 8); dil = sextract32(dif, 0, 12); if (dif != dil) { /* The TB is close, but outside the 12 bits addressable by the load. We can extend this to 20 bits with a sub of a shifted immediate from pc. In the vastly unlikely event the code requires more than 1MB, we'll use 2 insns and be no worse off. */ base = TCG_REG_R0; tcg_out_movi32(s, COND_AL, base, ptr - dil); } tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, base, dil); set_jmp_reset_offset(s, args[0]); } break; case INDEX_op_goto_ptr: tcg_out_bx(s, COND_AL, args[0]); 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_ctz_i32: tcg_out_dat_reg(s, COND_AL, INSN_RBIT, TCG_REG_TMP, 0, args[1], 0); a1 = TCG_REG_TMP; goto do_clz; case INDEX_op_clz_i32: a1 = args[1]; do_clz: a0 = args[0]; a2 = args[2]; c = const_args[2]; if (c && a2 == 32) { tcg_out_dat_reg(s, COND_AL, INSN_CLZ, a0, 0, a1, 0); break; } tcg_out_dat_imm(s, COND_AL, ARITH_CMP, 0, a1, 0); tcg_out_dat_reg(s, COND_NE, INSN_CLZ, a0, 0, a1, 0); if (c || a0 != a2) { tcg_out_dat_rIK(s, COND_EQ, ARITH_MOV, ARITH_MVN, a0, 0, a2, c); } 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_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_brcond2_i32: c = tcg_out_cmp2(s, args, const_args); tcg_out_goto_label(s, tcg_cond_to_arm_cond[c], arg_label(args[5])); break; case INDEX_op_setcond2_i32: c = tcg_out_cmp2(s, args + 1, const_args + 1); tcg_out_dat_imm(s, tcg_cond_to_arm_cond[c], ARITH_MOV, args[0], 0, 1); tcg_out_dat_imm(s, tcg_cond_to_arm_cond[tcg_invert_cond(c)], 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_extract_i32: tcg_out_extract(s, COND_AL, args[0], args[1], args[2], args[3]); break; case INDEX_op_sextract_i32: tcg_out_sextract(s, COND_AL, args[0], args[1], args[2], args[3]); break; case INDEX_op_extract2_i32: /* ??? These optimization vs zero should be generic. */ /* ??? But we can't substitute 2 for 1 in the opcode stream yet. */ if (const_args[1]) { if (const_args[2]) { tcg_out_movi(s, TCG_TYPE_REG, args[0], 0); } else { tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[2], SHIFT_IMM_LSL(32 - args[3])); } } else if (const_args[2]) { tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], SHIFT_IMM_LSR(args[3])); } else { /* We can do extract2 in 2 insns, vs the 3 required otherwise. */ tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_TMP, 0, args[2], SHIFT_IMM_LSL(32 - args[3])); tcg_out_dat_reg(s, COND_AL, ARITH_ORR, args[0], TCG_REG_TMP, args[1], SHIFT_IMM_LSR(args[3])); } 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_mb: tcg_out_mb(s, args[0]); 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 *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 s_s = { .args_ct_str = { "s", "s" } }; static const TCGTargetOpDef r_l = { .args_ct_str = { "r", "l" } }; static const TCGTargetOpDef r_r_r = { .args_ct_str = { "r", "r", "r" } }; 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 s_s_s = { .args_ct_str = { "s", "s", "s" } }; 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_r_rIN = { .args_ct_str = { "r", "r", "rIN" } }; static const TCGTargetOpDef r_r_rIK = { .args_ct_str = { "r", "r", "rIK" } }; static const TCGTargetOpDef r_r_r_r = { .args_ct_str = { "r", "r", "r", "r" } }; static const TCGTargetOpDef r_r_l_l = { .args_ct_str = { "r", "r", "l", "l" } }; static const TCGTargetOpDef s_s_s_s = { .args_ct_str = { "s", "s", "s", "s" } }; static const TCGTargetOpDef br = { .args_ct_str = { "r", "rIN" } }; static const TCGTargetOpDef ext2 = { .args_ct_str = { "r", "rZ", "rZ" } }; static const TCGTargetOpDef dep = { .args_ct_str = { "r", "0", "rZ" } }; static const TCGTargetOpDef movc = { .args_ct_str = { "r", "r", "rIN", "rIK", "0" } }; static const TCGTargetOpDef add2 = { .args_ct_str = { "r", "r", "r", "r", "rIN", "rIK" } }; static const TCGTargetOpDef sub2 = { .args_ct_str = { "r", "r", "rI", "rI", "rIN", "rIK" } }; static const TCGTargetOpDef br2 = { .args_ct_str = { "r", "r", "rI", "rI" } }; static const TCGTargetOpDef setc2 = { .args_ct_str = { "r", "r", "r", "rI", "rI" } }; 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_st8_i32: case INDEX_op_st16_i32: case INDEX_op_st_i32: case INDEX_op_neg_i32: case INDEX_op_not_i32: case INDEX_op_bswap16_i32: case INDEX_op_bswap32_i32: case INDEX_op_ext8s_i32: case INDEX_op_ext16s_i32: case INDEX_op_ext16u_i32: case INDEX_op_extract_i32: case INDEX_op_sextract_i32: return &r_r; case INDEX_op_add_i32: case INDEX_op_sub_i32: case INDEX_op_setcond_i32: return &r_r_rIN; case INDEX_op_and_i32: case INDEX_op_andc_i32: case INDEX_op_clz_i32: case INDEX_op_ctz_i32: return &r_r_rIK; case INDEX_op_mul_i32: case INDEX_op_div_i32: case INDEX_op_divu_i32: return &r_r_r; case INDEX_op_mulu2_i32: case INDEX_op_muls2_i32: return &r_r_r_r; case INDEX_op_or_i32: case INDEX_op_xor_i32: return &r_r_rI; case INDEX_op_shl_i32: case INDEX_op_shr_i32: case INDEX_op_sar_i32: case INDEX_op_rotl_i32: case INDEX_op_rotr_i32: return &r_r_ri; case INDEX_op_brcond_i32: return &br; case INDEX_op_deposit_i32: return &dep; case INDEX_op_extract2_i32: return &ext2; case INDEX_op_movcond_i32: return &movc; case INDEX_op_add2_i32: return &add2; case INDEX_op_sub2_i32: return &sub2; case INDEX_op_brcond2_i32: return &br2; case INDEX_op_setcond2_i32: return &setc2; case INDEX_op_qemu_ld_i32: return TARGET_LONG_BITS == 32 ? &r_l : &r_l_l; case INDEX_op_qemu_ld_i64: return TARGET_LONG_BITS == 32 ? &r_r_l : &r_r_l_l; case INDEX_op_qemu_st_i32: return TARGET_LONG_BITS == 32 ? &s_s : &s_s_s; case INDEX_op_qemu_st_i64: return TARGET_LONG_BITS == 32 ? &s_s_s : &s_s_s_s; default: return NULL; } } 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_target_available_regs[TCG_TYPE_I32] = 0xffff; tcg_target_call_clobber_regs = 0; tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R0); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R1); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R2); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R3); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R12); tcg_regset_set_reg(tcg_target_call_clobber_regs, TCG_REG_R14); s->reserved_regs = 0; 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); } 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 bool tcg_out_sti(TCGContext *s, TCGType type, TCGArg val, TCGReg base, intptr_t ofs) { return false; } static inline bool tcg_out_mov(TCGContext *s, TCGType type, TCGReg ret, TCGReg arg) { tcg_out_mov_reg(s, COND_AL, ret, arg); return true; } static inline void tcg_out_movi(TCGContext *s, TCGType type, TCGReg ret, tcg_target_long arg) { tcg_out_movi32(s, COND_AL, ret, arg); } static void tcg_out_nop_fill(tcg_insn_unit *p, int count) { int i; for (i = 0; i < count; ++i) { p[i] = INSN_NOP; } } /* 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]); /* * Return path for goto_ptr. Set return value to 0, a-la exit_tb, * and fall through to the rest of the epilogue. */ s->code_gen_epilogue = s->code_ptr; tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_R0, 0); /* TB epilogue */ tb_ret_addr = s->code_ptr; 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)); }