/* * 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. */ #if defined(__ARM_ARCH_7__) || \ defined(__ARM_ARCH_7A__) || \ defined(__ARM_ARCH_7EM__) || \ defined(__ARM_ARCH_7M__) || \ defined(__ARM_ARCH_7R__) #define USE_ARMV7_INSTRUCTIONS #endif #if defined(USE_ARMV7_INSTRUCTIONS) || \ defined(__ARM_ARCH_6J__) || \ defined(__ARM_ARCH_6K__) || \ defined(__ARM_ARCH_6T2__) || \ defined(__ARM_ARCH_6Z__) || \ defined(__ARM_ARCH_6ZK__) #define USE_ARMV6_INSTRUCTIONS #endif #if defined(USE_ARMV6_INSTRUCTIONS) || \ defined(__ARM_ARCH_5T__) || \ defined(__ARM_ARCH_5TE__) || \ defined(__ARM_ARCH_5TEJ__) #define USE_ARMV5_INSTRUCTIONS #endif #ifdef USE_ARMV5_INSTRUCTIONS static const int use_armv5_instructions = 1; #else static const int use_armv5_instructions = 0; #endif #undef USE_ARMV5_INSTRUCTIONS #ifdef USE_ARMV6_INSTRUCTIONS static const int use_armv6_instructions = 1; #else static const int use_armv6_instructions = 0; #endif #undef USE_ARMV6_INSTRUCTIONS #ifdef USE_ARMV7_INSTRUCTIONS static const int use_armv7_instructions = 1; #else static const int use_armv7_instructions = 0; #endif #undef USE_ARMV7_INSTRUCTIONS #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 }; static inline void reloc_abs32(void *code_ptr, tcg_target_long target) { *(uint32_t *) code_ptr = target; } static inline void reloc_pc24(void *code_ptr, tcg_target_long target) { uint32_t offset = ((target - ((tcg_target_long) code_ptr + 8)) >> 2); *(uint32_t *) code_ptr = ((*(uint32_t *) code_ptr) & ~0xffffff) | (offset & 0xffffff); } static void patch_reloc(uint8_t *code_ptr, int type, tcg_target_long value, tcg_target_long addend) { switch (type) { case R_ARM_ABS32: reloc_abs32(code_ptr, value); break; case R_ARM_CALL: case R_ARM_JUMP24: default: tcg_abort(); case R_ARM_PC24: reloc_pc24(code_ptr, value); break; } } /* 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 '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 and r1 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); #if TARGET_LONG_BITS == 64 /* If we're passing env to the helper as r0 and need a regpair * for the address then r2 will be overwritten as we're setting * up the args to the helper. */ tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2); #endif #endif break; case 'L': ct->ct |= TCG_CT_REG; tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1); #ifdef CONFIG_SOFTMMU /* r1 is still needed to load data_reg or data_reg2, so don't use it. */ tcg_regset_reset_reg(ct->u.regs, TCG_REG_R1); #endif break; /* qemu_st address & data_reg */ case 's': ct->ct |= TCG_CT_REG; tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1); /* r0 and r1 will be overwritten when reading the tlb entry (softmmu only) and 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) && (TARGET_LONG_BITS == 64) /* Avoid clashes with registers being used for helper args */ tcg_regset_reset_reg(ct->u.regs, TCG_REG_R2); tcg_regset_reset_reg(ct->u.regs, TCG_REG_R3); #endif break; /* qemu_st64 data_reg2 */ case 'S': ct->ct |= TCG_CT_REG; tcg_regset_set32(ct->u.regs, 0, (1 << TCG_TARGET_NB_REGS) - 1); /* r0 and r1 will be overwritten when reading the tlb entry (softmmu only) and 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); #ifdef CONFIG_SOFTMMU /* r2 is still needed to load data_reg, so don't use it. */ 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 #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, 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 return 0; } enum arm_data_opc_e { ARITH_AND = 0x0, ARITH_EOR = 0x1, ARITH_SUB = 0x2, ARITH_RSB = 0x3, ARITH_ADD = 0x4, ARITH_ADC = 0x5, ARITH_SBC = 0x6, ARITH_RSC = 0x7, ARITH_TST = 0x8, ARITH_CMP = 0xa, ARITH_CMN = 0xb, ARITH_ORR = 0xc, ARITH_MOV = 0xd, ARITH_BIC = 0xe, ARITH_MVN = 0xf, }; #define TO_CPSR(opc) \ ((opc == ARITH_CMP || opc == ARITH_CMN || opc == ARITH_TST) << 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) 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 skipping the corresponding bytes. This ensure that caches and memory are kept coherent during retranslation. */ #ifdef HOST_WORDS_BIGENDIAN tcg_out8(s, (cond << 4) | 0x0a); s->code_ptr += 3; #else s->code_ptr += 3; tcg_out8(s, (cond << 4) | 0x0a); #endif } 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 << 21) | TO_CPSR(opc) | (rn << 16) | (rd << 12) | shift | rm); } 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_reg2(TCGContext *s, int cond, int opc0, int opc1, int rd0, int rd1, int rn0, int rn1, int rm0, int rm1, int shift) { if (rd0 == rn1 || rd0 == rm1) { tcg_out32(s, (cond << 28) | (0 << 25) | (opc0 << 21) | (1 << 20) | (rn0 << 16) | (8 << 12) | shift | rm0); tcg_out32(s, (cond << 28) | (0 << 25) | (opc1 << 21) | (rn1 << 16) | (rd1 << 12) | shift | rm1); tcg_out_dat_reg(s, cond, ARITH_MOV, rd0, 0, TCG_REG_R8, SHIFT_IMM_LSL(0)); } else { tcg_out32(s, (cond << 28) | (0 << 25) | (opc0 << 21) | (1 << 20) | (rn0 << 16) | (rd0 << 12) | shift | rm0); tcg_out32(s, (cond << 28) | (0 << 25) | (opc1 << 21) | (rn1 << 16) | (rd1 << 12) | shift | rm1); } } 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 << 21) | TO_CPSR(opc) | (rn << 16) | (rd << 12) | im); } static inline void tcg_out_movi32(TCGContext *s, int cond, int rd, uint32_t arg) { /* TODO: This is very suboptimal, we can easily have a constant * pool somewhere after all the instructions. */ if ((int)arg < 0 && (int)arg >= -0x100) { tcg_out_dat_imm(s, cond, ARITH_MVN, rd, 0, (~arg) & 0xff); } else if (use_armv7_instructions) { /* use movw/movt */ /* 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)); } } else { int opc = ARITH_MOV; int rn = 0; do { int i, rot; 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_ORR; 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 inline void tcg_out_mul32(TCGContext *s, int cond, int rd, int rs, int rm) { if (rd != rm) tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) | (rs << 8) | 0x90 | rm); else if (rd != rs) tcg_out32(s, (cond << 28) | (rd << 16) | (0 << 12) | (rm << 8) | 0x90 | rs); else { tcg_out32(s, (cond << 28) | ( 8 << 16) | (0 << 12) | (rs << 8) | 0x90 | rm); tcg_out_dat_reg(s, cond, ARITH_MOV, rd, 0, TCG_REG_R8, SHIFT_IMM_LSL(0)); } } static inline void tcg_out_umull32(TCGContext *s, int cond, int rd0, int rd1, int rs, int rm) { if (rd0 != rm && rd1 != rm) tcg_out32(s, (cond << 28) | 0x800090 | (rd1 << 16) | (rd0 << 12) | (rs << 8) | rm); else if (rd0 != rs && rd1 != rs) tcg_out32(s, (cond << 28) | 0x800090 | (rd1 << 16) | (rd0 << 12) | (rm << 8) | rs); else { tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0)); tcg_out32(s, (cond << 28) | 0x800098 | (rd1 << 16) | (rd0 << 12) | (rs << 8)); } } static inline void tcg_out_smull32(TCGContext *s, int cond, int rd0, int rd1, int rs, int rm) { if (rd0 != rm && rd1 != rm) tcg_out32(s, (cond << 28) | 0xc00090 | (rd1 << 16) | (rd0 << 12) | (rs << 8) | rm); else if (rd0 != rs && rd1 != rs) tcg_out32(s, (cond << 28) | 0xc00090 | (rd1 << 16) | (rd0 << 12) | (rm << 8) | rs); else { tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, rm, SHIFT_IMM_LSL(0)); tcg_out32(s, (cond << 28) | 0xc00098 | (rd1 << 16) | (rd0 << 12) | (rs << 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_R8, 0, rn, SHIFT_IMM_LSL(24)); tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, TCG_REG_R8, SHIFT_IMM_ASR(16)); tcg_out_dat_reg(s, cond, ARITH_ORR, rd, TCG_REG_R8, 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_R8, 0, rn, SHIFT_IMM_LSL(24)); tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R8, 0, TCG_REG_R8, SHIFT_IMM_LSR(16)); tcg_out_dat_reg(s, cond, ARITH_ORR, rd, TCG_REG_R8, 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_R8, 0, rn, SHIFT_IMM_LSR(8)); tcg_out_dat_imm(s, cond, ARITH_AND, TCG_REG_R8, TCG_REG_R8, 0xff); tcg_out_dat_reg(s, cond, ARITH_ORR, rd, TCG_REG_R8, 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_R8, rn, rn, SHIFT_IMM_ROR(16)); tcg_out_dat_imm(s, cond, ARITH_BIC, TCG_REG_R8, TCG_REG_R8, 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_R8, SHIFT_IMM_LSR(8)); } } static inline void tcg_out_ld32_12(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x05900000 | (rn << 16) | (rd << 12) | (im & 0xfff)); else tcg_out32(s, (cond << 28) | 0x05100000 | (rn << 16) | (rd << 12) | ((-im) & 0xfff)); } /* Offset pre-increment with base writeback. */ static inline void tcg_out_ld32_12wb(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { /* ldr with writeback and both register equals is UNPREDICTABLE */ assert(rd != rn); if (im >= 0) { tcg_out32(s, (cond << 28) | 0x05b00000 | (rn << 16) | (rd << 12) | (im & 0xfff)); } else { tcg_out32(s, (cond << 28) | 0x05300000 | (rn << 16) | (rd << 12) | ((-im) & 0xfff)); } } static inline void tcg_out_st32_12(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x05800000 | (rn << 16) | (rd << 12) | (im & 0xfff)); else tcg_out32(s, (cond << 28) | 0x05000000 | (rn << 16) | (rd << 12) | ((-im) & 0xfff)); } static inline void tcg_out_ld32_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x07900000 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_st32_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x07800000 | (rn << 16) | (rd << 12) | rm); } /* Register pre-increment with base writeback. */ static inline void tcg_out_ld32_rwb(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x07b00000 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_st32_rwb(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x07a00000 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_ld16u_8(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x01d000b0 | (rn << 16) | (rd << 12) | ((im & 0xf0) << 4) | (im & 0xf)); else tcg_out32(s, (cond << 28) | 0x015000b0 | (rn << 16) | (rd << 12) | (((-im) & 0xf0) << 4) | ((-im) & 0xf)); } static inline void tcg_out_st16_8(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x01c000b0 | (rn << 16) | (rd << 12) | ((im & 0xf0) << 4) | (im & 0xf)); else tcg_out32(s, (cond << 28) | 0x014000b0 | (rn << 16) | (rd << 12) | (((-im) & 0xf0) << 4) | ((-im) & 0xf)); } static inline void tcg_out_ld16u_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x019000b0 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_st16_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x018000b0 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_ld16s_8(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x01d000f0 | (rn << 16) | (rd << 12) | ((im & 0xf0) << 4) | (im & 0xf)); else tcg_out32(s, (cond << 28) | 0x015000f0 | (rn << 16) | (rd << 12) | (((-im) & 0xf0) << 4) | ((-im) & 0xf)); } static inline void tcg_out_ld16s_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x019000f0 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_ld8_12(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x05d00000 | (rn << 16) | (rd << 12) | (im & 0xfff)); else tcg_out32(s, (cond << 28) | 0x05500000 | (rn << 16) | (rd << 12) | ((-im) & 0xfff)); } static inline void tcg_out_st8_12(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x05c00000 | (rn << 16) | (rd << 12) | (im & 0xfff)); else tcg_out32(s, (cond << 28) | 0x05400000 | (rn << 16) | (rd << 12) | ((-im) & 0xfff)); } static inline void tcg_out_ld8_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x07d00000 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_st8_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x07c00000 | (rn << 16) | (rd << 12) | rm); } static inline void tcg_out_ld8s_8(TCGContext *s, int cond, int rd, int rn, tcg_target_long im) { if (im >= 0) tcg_out32(s, (cond << 28) | 0x01d000d0 | (rn << 16) | (rd << 12) | ((im & 0xf0) << 4) | (im & 0xf)); else tcg_out32(s, (cond << 28) | 0x015000d0 | (rn << 16) | (rd << 12) | (((-im) & 0xf0) << 4) | ((-im) & 0xf)); } static inline void tcg_out_ld8s_r(TCGContext *s, int cond, int rd, int rn, int rm) { tcg_out32(s, (cond << 28) | 0x019000d0 | (rn << 16) | (rd << 12) | rm); } 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_R8, offset); tcg_out_ld32_r(s, cond, rd, rn, TCG_REG_R8); } 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_R8, offset); tcg_out_st32_r(s, cond, rd, rn, TCG_REG_R8); } 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_R8, offset); tcg_out_ld16u_r(s, cond, rd, rn, TCG_REG_R8); } 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_R8, offset); tcg_out_ld16s_r(s, cond, rd, rn, TCG_REG_R8); } 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_R8, offset); tcg_out_st16_r(s, cond, rd, rn, TCG_REG_R8); } 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_R8, offset); tcg_out_ld8_r(s, cond, rd, rn, TCG_REG_R8); } 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_R8, offset); tcg_out_ld8s_r(s, cond, rd, rn, TCG_REG_R8); } 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_R8, offset); tcg_out_st8_r(s, cond, rd, rn, TCG_REG_R8); } 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 shouldn't need the long * case. * * .... except to the prologue that is in its own buffer. */ static inline void tcg_out_goto(TCGContext *s, int cond, uint32_t addr) { int32_t val; if (addr & 1) { /* goto to a Thumb destination isn't supported */ tcg_abort(); } val = addr - (tcg_target_long) s->code_ptr; if (val - 8 < 0x01fffffd && val - 8 > -0x01fffffd) tcg_out_b(s, cond, val); else { if (cond == COND_AL) { tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, -4); tcg_out32(s, addr); } else { tcg_out_movi32(s, cond, TCG_REG_R8, val - 8); tcg_out_dat_reg(s, cond, ARITH_ADD, TCG_REG_PC, TCG_REG_PC, TCG_REG_R8, SHIFT_IMM_LSL(0)); } } } /* The call case is mostly used for helpers - so it's not unreasonable * for them to be beyond branch range */ static inline void tcg_out_call(TCGContext *s, uint32_t addr) { int32_t val; val = addr - (tcg_target_long) s->code_ptr; if (val - 8 < 0x02000000 && val - 8 >= -0x02000000) { if (addr & 1) { /* Use BLX if the target is in Thumb mode */ if (!use_armv5_instructions) { tcg_abort(); } tcg_out_blx_imm(s, val); } else { tcg_out_bl(s, COND_AL, val); } } 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, addr); } } static inline void tcg_out_callr(TCGContext *s, int cond, int arg) { if (use_armv5_instructions) { tcg_out_blx(s, cond, arg); } else { tcg_out_dat_reg(s, cond, ARITH_MOV, TCG_REG_R14, 0, TCG_REG_PC, SHIFT_IMM_LSL(0)); tcg_out_bx(s, cond, arg); } } static inline void tcg_out_goto_label(TCGContext *s, int cond, int label_index) { TCGLabel *l = &s->labels[label_index]; if (l->has_value) tcg_out_goto(s, cond, l->u.value); else if (cond == COND_AL) { tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, -4); tcg_out_reloc(s, s->code_ptr, R_ARM_ABS32, label_index, 31337); s->code_ptr += 4; } else { /* Probably this should be preferred even for COND_AL... */ tcg_out_reloc(s, s->code_ptr, R_ARM_PC24, label_index, 31337); tcg_out_b_noaddr(s, cond); } } #ifdef CONFIG_SOFTMMU #include "exec/softmmu_defs.h" /* helper signature: helper_ld_mmu(CPUState *env, target_ulong addr, int mmu_idx) */ static const void * const qemu_ld_helpers[4] = { helper_ldb_mmu, helper_ldw_mmu, helper_ldl_mmu, helper_ldq_mmu, }; /* helper signature: helper_st_mmu(CPUState *env, target_ulong addr, uintxx_t val, int mmu_idx) */ static const void * const qemu_st_helpers[4] = { helper_stb_mmu, helper_stw_mmu, helper_stl_mmu, helper_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. * When we reach the first stacked argument, we allocate space for it * and the following stacked arguments using "str r8, [sp, #-0x10]!". * Following arguments are filled in with "str r8, [sp, #0xNN]". * For more than 4 stacked arguments we'd need to know how much * space to allocate when we pushed the first stacked argument. * We don't need this, so don't implement it (and will assert if you try it.) * * 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, ARGPARAM) \ static TCGReg NAME(TCGContext *s, TCGReg argreg, ARGPARAM) \ { \ if (argreg < 4) { \ TCG_OUT_ARG_GET_ARG(argreg); \ } else if (argreg == 4) { \ TCG_OUT_ARG_GET_ARG(TCG_REG_R8); \ tcg_out32(s, (COND_AL << 28) | 0x052d8010); \ } else { \ assert(argreg < 8); \ TCG_OUT_ARG_GET_ARG(TCG_REG_R8); \ tcg_out32(s, (COND_AL << 28) | 0x058d8000 | (argreg - 4) * 4); \ } \ return argreg + 1; \ } #define TCG_OUT_ARG_GET_ARG(A) tcg_out_dat_imm(s, COND_AL, ARITH_MOV, A, 0, arg) DEFINE_TCG_OUT_ARG(tcg_out_arg_imm32, uint32_t arg) #undef TCG_OUT_ARG_GET_ARG #define TCG_OUT_ARG_GET_ARG(A) tcg_out_ext8u(s, COND_AL, A, arg) DEFINE_TCG_OUT_ARG(tcg_out_arg_reg8, TCGReg arg) #undef TCG_OUT_ARG_GET_ARG #define TCG_OUT_ARG_GET_ARG(A) tcg_out_ext16u(s, COND_AL, A, arg) DEFINE_TCG_OUT_ARG(tcg_out_arg_reg16, TCGReg arg) #undef TCG_OUT_ARG_GET_ARG /* We don't use the macro for this one to avoid an unnecessary reg-reg * move when storing to the stack. */ static TCGReg tcg_out_arg_reg32(TCGContext *s, TCGReg argreg, TCGReg arg) { if (argreg < 4) { tcg_out_mov_reg(s, COND_AL, argreg, arg); } else if (argreg == 4) { /* str arg, [sp, #-0x10]! */ tcg_out32(s, (COND_AL << 28) | 0x052d0010 | (arg << 12)); } else { assert(argreg < 8); /* str arg, [sp, #0xNN] */ tcg_out32(s, (COND_AL << 28) | 0x058d0000 | (arg << 12) | (argreg - 4) * 4); } return argreg + 1; } static inline 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++; } argreg = tcg_out_arg_reg32(s, argreg, arglo); argreg = tcg_out_arg_reg32(s, argreg, arghi); return argreg; } static inline void tcg_out_arg_stacktidy(TCGContext *s, TCGReg argreg) { /* Output any necessary post-call cleanup of the stack */ if (argreg > 4) { tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R13, TCG_REG_R13, 0x10); } } #endif #define TLB_SHIFT (CPU_TLB_ENTRY_BITS + CPU_TLB_BITS) static inline void tcg_out_qemu_ld(TCGContext *s, const TCGArg *args, int opc) { int addr_reg, data_reg, data_reg2, bswap; #ifdef CONFIG_SOFTMMU int mem_index, s_bits, tlb_offset; TCGReg argreg; # if TARGET_LONG_BITS == 64 int addr_reg2; # endif uint32_t *label_ptr; #endif #ifdef TARGET_WORDS_BIGENDIAN bswap = 1; #else bswap = 0; #endif data_reg = *args++; if (opc == 3) data_reg2 = *args++; else data_reg2 = 0; /* suppress warning */ addr_reg = *args++; #ifdef CONFIG_SOFTMMU # if TARGET_LONG_BITS == 64 addr_reg2 = *args++; # endif mem_index = *args; s_bits = opc & 3; /* Should generate something like the following: * shr r8, addr_reg, #TARGET_PAGE_BITS * and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8 * add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS */ # if CPU_TLB_BITS > 8 # error # endif tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_R8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS)); tcg_out_dat_imm(s, COND_AL, ARITH_AND, TCG_REG_R0, TCG_REG_R8, CPU_TLB_SIZE - 1); tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_R0, TCG_AREG0, TCG_REG_R0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS)); /* We assume that the offset is contained within 20 bits. */ tlb_offset = offsetof(CPUArchState, tlb_table[mem_index][0].addr_read); assert(tlb_offset & ~0xfffff == 0); if (tlb_offset > 0xfff) { tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R0, TCG_REG_R0, 0xa00 | (tlb_offset >> 12)); tlb_offset &= 0xfff; } tcg_out_ld32_12wb(s, COND_AL, TCG_REG_R1, TCG_REG_R0, tlb_offset); tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0, TCG_REG_R1, TCG_REG_R8, SHIFT_IMM_LSL(TARGET_PAGE_BITS)); /* Check alignment. */ if (s_bits) tcg_out_dat_imm(s, COND_EQ, ARITH_TST, 0, addr_reg, (1 << s_bits) - 1); # if TARGET_LONG_BITS == 64 /* XXX: possibly we could use a block data load in the first access. */ tcg_out_ld32_12(s, COND_EQ, TCG_REG_R1, TCG_REG_R0, 4); tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0, TCG_REG_R1, addr_reg2, SHIFT_IMM_LSL(0)); # endif tcg_out_ld32_12(s, COND_EQ, TCG_REG_R1, TCG_REG_R0, offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_read)); switch (opc) { case 0: tcg_out_ld8_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); break; case 0 | 4: tcg_out_ld8s_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); break; case 1: tcg_out_ld16u_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); if (bswap) { tcg_out_bswap16(s, COND_EQ, data_reg, data_reg); } break; case 1 | 4: if (bswap) { tcg_out_ld16u_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); tcg_out_bswap16s(s, COND_EQ, data_reg, data_reg); } else { tcg_out_ld16s_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); } break; case 2: default: tcg_out_ld32_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); if (bswap) { tcg_out_bswap32(s, COND_EQ, data_reg, data_reg); } break; case 3: if (bswap) { tcg_out_ld32_rwb(s, COND_EQ, data_reg2, TCG_REG_R1, addr_reg); tcg_out_ld32_12(s, COND_EQ, data_reg, TCG_REG_R1, 4); tcg_out_bswap32(s, COND_EQ, data_reg2, data_reg2); tcg_out_bswap32(s, COND_EQ, data_reg, data_reg); } else { tcg_out_ld32_rwb(s, COND_EQ, data_reg, TCG_REG_R1, addr_reg); tcg_out_ld32_12(s, COND_EQ, data_reg2, TCG_REG_R1, 4); } break; } label_ptr = (void *) s->code_ptr; tcg_out_b_noaddr(s, COND_EQ); /* TODO: move this code to where the constants pool will be */ /* Note that this code relies on the constraints we set in arm_op_defs[] * to ensure that later arguments are not passed to us in registers we * trash by moving the earlier arguments into them. */ 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, addr_reg, addr_reg2); #else argreg = tcg_out_arg_reg32(s, argreg, addr_reg); #endif argreg = tcg_out_arg_imm32(s, argreg, mem_index); tcg_out_call(s, (tcg_target_long) qemu_ld_helpers[s_bits]); tcg_out_arg_stacktidy(s, argreg); switch (opc) { case 0 | 4: tcg_out_ext8s(s, COND_AL, data_reg, TCG_REG_R0); break; case 1 | 4: tcg_out_ext16s(s, COND_AL, data_reg, TCG_REG_R0); break; case 0: case 1: case 2: default: tcg_out_mov_reg(s, COND_AL, data_reg, TCG_REG_R0); break; case 3: tcg_out_mov_reg(s, COND_AL, data_reg, TCG_REG_R0); tcg_out_mov_reg(s, COND_AL, data_reg2, TCG_REG_R1); break; } reloc_pc24(label_ptr, (tcg_target_long)s->code_ptr); #else /* !CONFIG_SOFTMMU */ if (GUEST_BASE) { uint32_t offset = GUEST_BASE; int i; int rot; while (offset) { i = ctz32(offset) & ~1; rot = ((32 - i) << 7) & 0xf00; tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R8, addr_reg, ((offset >> i) & 0xff) | rot); addr_reg = TCG_REG_R8; offset &= ~(0xff << i); } } switch (opc) { case 0: tcg_out_ld8_12(s, COND_AL, data_reg, addr_reg, 0); break; case 0 | 4: tcg_out_ld8s_8(s, COND_AL, data_reg, addr_reg, 0); break; case 1: tcg_out_ld16u_8(s, COND_AL, data_reg, addr_reg, 0); if (bswap) { tcg_out_bswap16(s, COND_AL, data_reg, data_reg); } break; case 1 | 4: if (bswap) { tcg_out_ld16u_8(s, COND_AL, data_reg, addr_reg, 0); tcg_out_bswap16s(s, COND_AL, data_reg, data_reg); } else { tcg_out_ld16s_8(s, COND_AL, data_reg, addr_reg, 0); } break; case 2: default: tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, 0); if (bswap) { tcg_out_bswap32(s, COND_AL, data_reg, data_reg); } break; case 3: /* TODO: use block load - * check that data_reg2 > data_reg or the other way */ if (data_reg == addr_reg) { tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, bswap ? 0 : 4); tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, bswap ? 4 : 0); } else { tcg_out_ld32_12(s, COND_AL, data_reg, addr_reg, bswap ? 4 : 0); tcg_out_ld32_12(s, COND_AL, data_reg2, addr_reg, bswap ? 0 : 4); } if (bswap) { tcg_out_bswap32(s, COND_AL, data_reg, data_reg); tcg_out_bswap32(s, COND_AL, data_reg2, data_reg2); } break; } #endif } static inline void tcg_out_qemu_st(TCGContext *s, const TCGArg *args, int opc) { int addr_reg, data_reg, data_reg2, bswap; #ifdef CONFIG_SOFTMMU int mem_index, s_bits, tlb_offset; TCGReg argreg; # if TARGET_LONG_BITS == 64 int addr_reg2; # endif uint32_t *label_ptr; #endif #ifdef TARGET_WORDS_BIGENDIAN bswap = 1; #else bswap = 0; #endif data_reg = *args++; if (opc == 3) data_reg2 = *args++; else data_reg2 = 0; /* suppress warning */ addr_reg = *args++; #ifdef CONFIG_SOFTMMU # if TARGET_LONG_BITS == 64 addr_reg2 = *args++; # endif mem_index = *args; s_bits = opc & 3; /* Should generate something like the following: * shr r8, addr_reg, #TARGET_PAGE_BITS * and r0, r8, #(CPU_TLB_SIZE - 1) @ Assumption: CPU_TLB_BITS <= 8 * add r0, env, r0 lsl #CPU_TLB_ENTRY_BITS */ tcg_out_dat_reg(s, COND_AL, ARITH_MOV, TCG_REG_R8, 0, addr_reg, SHIFT_IMM_LSR(TARGET_PAGE_BITS)); tcg_out_dat_imm(s, COND_AL, ARITH_AND, TCG_REG_R0, TCG_REG_R8, CPU_TLB_SIZE - 1); tcg_out_dat_reg(s, COND_AL, ARITH_ADD, TCG_REG_R0, TCG_AREG0, TCG_REG_R0, SHIFT_IMM_LSL(CPU_TLB_ENTRY_BITS)); /* We assume that the offset is contained within 20 bits. */ tlb_offset = offsetof(CPUArchState, tlb_table[mem_index][0].addr_write); assert(tlb_offset & ~0xfffff == 0); if (tlb_offset > 0xfff) { tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R0, TCG_REG_R0, 0xa00 | (tlb_offset >> 12)); tlb_offset &= 0xfff; } tcg_out_ld32_12wb(s, COND_AL, TCG_REG_R1, TCG_REG_R0, tlb_offset); tcg_out_dat_reg(s, COND_AL, ARITH_CMP, 0, TCG_REG_R1, TCG_REG_R8, SHIFT_IMM_LSL(TARGET_PAGE_BITS)); /* Check alignment. */ if (s_bits) tcg_out_dat_imm(s, COND_EQ, ARITH_TST, 0, addr_reg, (1 << s_bits) - 1); # if TARGET_LONG_BITS == 64 /* XXX: possibly we could use a block data load in the first access. */ tcg_out_ld32_12(s, COND_EQ, TCG_REG_R1, TCG_REG_R0, 4); tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0, TCG_REG_R1, addr_reg2, SHIFT_IMM_LSL(0)); # endif tcg_out_ld32_12(s, COND_EQ, TCG_REG_R1, TCG_REG_R0, offsetof(CPUTLBEntry, addend) - offsetof(CPUTLBEntry, addr_write)); switch (opc) { case 0: tcg_out_st8_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); break; case 1: if (bswap) { tcg_out_bswap16st(s, COND_EQ, TCG_REG_R0, data_reg); tcg_out_st16_r(s, COND_EQ, TCG_REG_R0, addr_reg, TCG_REG_R1); } else { tcg_out_st16_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); } break; case 2: default: if (bswap) { tcg_out_bswap32(s, COND_EQ, TCG_REG_R0, data_reg); tcg_out_st32_r(s, COND_EQ, TCG_REG_R0, addr_reg, TCG_REG_R1); } else { tcg_out_st32_r(s, COND_EQ, data_reg, addr_reg, TCG_REG_R1); } break; case 3: if (bswap) { tcg_out_bswap32(s, COND_EQ, TCG_REG_R0, data_reg2); tcg_out_st32_rwb(s, COND_EQ, TCG_REG_R0, TCG_REG_R1, addr_reg); tcg_out_bswap32(s, COND_EQ, TCG_REG_R0, data_reg); tcg_out_st32_12(s, COND_EQ, TCG_REG_R0, TCG_REG_R1, 4); } else { tcg_out_st32_rwb(s, COND_EQ, data_reg, TCG_REG_R1, addr_reg); tcg_out_st32_12(s, COND_EQ, data_reg2, TCG_REG_R1, 4); } break; } label_ptr = (void *) s->code_ptr; tcg_out_b_noaddr(s, COND_EQ); /* TODO: move this code to where the constants pool will be */ /* Note that this code relies on the constraints we set in arm_op_defs[] * to ensure that later arguments are not passed to us in registers we * trash by moving the earlier arguments into them. */ 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, addr_reg, addr_reg2); #else argreg = tcg_out_arg_reg32(s, argreg, addr_reg); #endif switch (opc) { case 0: argreg = tcg_out_arg_reg8(s, argreg, data_reg); break; case 1: argreg = tcg_out_arg_reg16(s, argreg, data_reg); break; case 2: argreg = tcg_out_arg_reg32(s, argreg, data_reg); break; case 3: argreg = tcg_out_arg_reg64(s, argreg, data_reg, data_reg2); break; } argreg = tcg_out_arg_imm32(s, argreg, mem_index); tcg_out_call(s, (tcg_target_long) qemu_st_helpers[s_bits]); tcg_out_arg_stacktidy(s, argreg); reloc_pc24(label_ptr, (tcg_target_long)s->code_ptr); #else /* !CONFIG_SOFTMMU */ if (GUEST_BASE) { uint32_t offset = GUEST_BASE; int i; int rot; while (offset) { i = ctz32(offset) & ~1; rot = ((32 - i) << 7) & 0xf00; tcg_out_dat_imm(s, COND_AL, ARITH_ADD, TCG_REG_R1, addr_reg, ((offset >> i) & 0xff) | rot); addr_reg = TCG_REG_R1; offset &= ~(0xff << i); } } switch (opc) { case 0: tcg_out_st8_12(s, COND_AL, data_reg, addr_reg, 0); break; case 1: if (bswap) { tcg_out_bswap16st(s, COND_AL, TCG_REG_R0, data_reg); tcg_out_st16_8(s, COND_AL, TCG_REG_R0, addr_reg, 0); } else { tcg_out_st16_8(s, COND_AL, data_reg, addr_reg, 0); } break; case 2: default: if (bswap) { tcg_out_bswap32(s, COND_AL, TCG_REG_R0, data_reg); tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addr_reg, 0); } else { tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0); } break; case 3: /* TODO: use block store - * check that data_reg2 > data_reg or the other way */ if (bswap) { tcg_out_bswap32(s, COND_AL, TCG_REG_R0, data_reg2); tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addr_reg, 0); tcg_out_bswap32(s, COND_AL, TCG_REG_R0, data_reg); tcg_out_st32_12(s, COND_AL, TCG_REG_R0, addr_reg, 4); } else { tcg_out_st32_12(s, COND_AL, data_reg, addr_reg, 0); tcg_out_st32_12(s, COND_AL, data_reg2, addr_reg, 4); } break; } #endif } static uint8_t *tb_ret_addr; static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, const TCGArg *args, const int *const_args) { int c; switch (opc) { case INDEX_op_exit_tb: { uint8_t *ld_ptr = s->code_ptr; if (args[0] >> 8) tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, TCG_REG_PC, 0); else tcg_out_dat_imm(s, COND_AL, ARITH_MOV, TCG_REG_R0, 0, args[0]); tcg_out_goto(s, COND_AL, (tcg_target_ulong) tb_ret_addr); if (args[0] >> 8) { *ld_ptr = (uint8_t) (s->code_ptr - ld_ptr) - 8; tcg_out32(s, args[0]); } } break; case INDEX_op_goto_tb: if (s->tb_jmp_offset) { /* Direct jump method */ #if defined(USE_DIRECT_JUMP) s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf; tcg_out_b_noaddr(s, COND_AL); #else tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, -4); s->tb_jmp_offset[args[0]] = s->code_ptr - s->code_buf; tcg_out32(s, 0); #endif } else { /* Indirect jump method */ #if 1 c = (int) (s->tb_next + args[0]) - ((int) s->code_ptr + 8); if (c > 0xfff || c < -0xfff) { tcg_out_movi32(s, COND_AL, TCG_REG_R0, (tcg_target_long) (s->tb_next + args[0])); tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_R0, 0); } else tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_PC, c); #else tcg_out_ld32_12(s, COND_AL, TCG_REG_R0, TCG_REG_PC, 0); tcg_out_ld32_12(s, COND_AL, TCG_REG_PC, TCG_REG_R0, 0); tcg_out32(s, (tcg_target_long) (s->tb_next + args[0])); #endif } s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf; break; case INDEX_op_call: if (const_args[0]) tcg_out_call(s, args[0]); else tcg_out_callr(s, COND_AL, args[0]); break; case INDEX_op_br: tcg_out_goto_label(s, COND_AL, 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_mov_i32: tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], SHIFT_IMM_LSL(0)); break; case INDEX_op_movi_i32: tcg_out_movi32(s, COND_AL, args[0], args[1]); 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_rI(s, COND_AL, ARITH_CMP, 0, args[1], args[2], const_args[2]); tcg_out_dat_rI(s, tcg_cond_to_arm_cond[args[5]], ARITH_MOV, args[0], 0, args[3], const_args[3]); break; case INDEX_op_add_i32: c = ARITH_ADD; goto gen_arith; case INDEX_op_sub_i32: c = ARITH_SUB; goto gen_arith; case INDEX_op_and_i32: c = ARITH_AND; goto gen_arith; case INDEX_op_andc_i32: c = ARITH_BIC; goto gen_arith; 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: tcg_out_dat_reg2(s, COND_AL, ARITH_ADD, ARITH_ADC, args[0], args[1], args[2], args[3], args[4], args[5], SHIFT_IMM_LSL(0)); break; case INDEX_op_sub2_i32: tcg_out_dat_reg2(s, COND_AL, ARITH_SUB, ARITH_SBC, args[0], args[1], args[2], args[3], args[4], args[5], SHIFT_IMM_LSL(0)); 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; /* 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_R8, args[1], 0x20); tcg_out_dat_reg(s, COND_AL, ARITH_MOV, args[0], 0, args[1], SHIFT_REG_ROR(TCG_REG_R8)); } break; case INDEX_op_brcond_i32: tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 0, args[0], args[1], const_args[1]); tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[2]], 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_reg(s, COND_AL, ARITH_CMP, 0, args[1], args[3], SHIFT_IMM_LSL(0)); tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0, args[0], args[2], SHIFT_IMM_LSL(0)); tcg_out_goto_label(s, tcg_cond_to_arm_cond[args[4]], args[5]); break; case INDEX_op_setcond_i32: tcg_out_dat_rI(s, COND_AL, ARITH_CMP, 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_reg(s, COND_AL, ARITH_CMP, 0, args[2], args[4], SHIFT_IMM_LSL(0)); tcg_out_dat_reg(s, COND_EQ, ARITH_CMP, 0, args[1], args[3], SHIFT_IMM_LSL(0)); 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_ld8u: tcg_out_qemu_ld(s, args, 0); break; case INDEX_op_qemu_ld8s: tcg_out_qemu_ld(s, args, 0 | 4); break; case INDEX_op_qemu_ld16u: tcg_out_qemu_ld(s, args, 1); break; case INDEX_op_qemu_ld16s: tcg_out_qemu_ld(s, args, 1 | 4); break; case INDEX_op_qemu_ld32: tcg_out_qemu_ld(s, args, 2); break; case INDEX_op_qemu_ld64: tcg_out_qemu_ld(s, args, 3); break; case INDEX_op_qemu_st8: tcg_out_qemu_st(s, args, 0); break; case INDEX_op_qemu_st16: tcg_out_qemu_st(s, args, 1); break; case INDEX_op_qemu_st32: tcg_out_qemu_st(s, args, 2); break; case INDEX_op_qemu_st64: tcg_out_qemu_st(s, args, 3); 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; default: tcg_abort(); } } static const TCGTargetOpDef arm_op_defs[] = { { INDEX_op_exit_tb, { } }, { INDEX_op_goto_tb, { } }, { INDEX_op_call, { "ri" } }, { INDEX_op_br, { } }, { INDEX_op_mov_i32, { "r", "r" } }, { INDEX_op_movi_i32, { "r" } }, { 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", "rI" } }, { INDEX_op_sub_i32, { "r", "r", "rI" } }, { INDEX_op_mul_i32, { "r", "r", "r" } }, { INDEX_op_mulu2_i32, { "r", "r", "r", "r" } }, { INDEX_op_and_i32, { "r", "r", "rI" } }, { INDEX_op_andc_i32, { "r", "r", "rI" } }, { 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", "rI" } }, { INDEX_op_setcond_i32, { "r", "r", "rI" } }, { INDEX_op_movcond_i32, { "r", "r", "rI", "rI", "0" } }, /* TODO: "r", "r", "r", "r", "ri", "ri" */ { INDEX_op_add2_i32, { "r", "r", "r", "r", "r", "r" } }, { INDEX_op_sub2_i32, { "r", "r", "r", "r", "r", "r" } }, { INDEX_op_brcond2_i32, { "r", "r", "r", "r" } }, { INDEX_op_setcond2_i32, { "r", "r", "r", "r", "r" } }, #if TARGET_LONG_BITS == 32 { INDEX_op_qemu_ld8u, { "r", "l" } }, { INDEX_op_qemu_ld8s, { "r", "l" } }, { INDEX_op_qemu_ld16u, { "r", "l" } }, { INDEX_op_qemu_ld16s, { "r", "l" } }, { INDEX_op_qemu_ld32, { "r", "l" } }, { INDEX_op_qemu_ld64, { "L", "L", "l" } }, { INDEX_op_qemu_st8, { "s", "s" } }, { INDEX_op_qemu_st16, { "s", "s" } }, { INDEX_op_qemu_st32, { "s", "s" } }, { INDEX_op_qemu_st64, { "S", "S", "s" } }, #else { INDEX_op_qemu_ld8u, { "r", "l", "l" } }, { INDEX_op_qemu_ld8s, { "r", "l", "l" } }, { INDEX_op_qemu_ld16u, { "r", "l", "l" } }, { INDEX_op_qemu_ld16s, { "r", "l", "l" } }, { INDEX_op_qemu_ld32, { "r", "l", "l" } }, { INDEX_op_qemu_ld64, { "L", "L", "l", "l" } }, { INDEX_op_qemu_st8, { "s", "s", "s" } }, { INDEX_op_qemu_st16, { "s", "s", "s" } }, { INDEX_op_qemu_st32, { "s", "s", "s" } }, { INDEX_op_qemu_st64, { "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" } }, { -1 }, }; static void tcg_target_init(TCGContext *s) { #if !defined(CONFIG_USER_ONLY) /* fail safe */ if ((1 << CPU_TLB_ENTRY_BITS) != sizeof(CPUTLBEntry)) tcg_abort(); #endif 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_R8); tcg_regset_set_reg(s->reserved_regs, TCG_REG_PC); tcg_add_target_add_op_defs(arm_op_defs); tcg_set_frame(s, TCG_AREG0, offsetof(CPUArchState, temp_buf), CPU_TEMP_BUF_NLONGS * sizeof(long)); } static inline void tcg_out_ld(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1, tcg_target_long arg2) { tcg_out_ld32u(s, COND_AL, arg, arg1, arg2); } static inline void tcg_out_st(TCGContext *s, TCGType type, TCGReg arg, TCGReg arg1, tcg_target_long 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); } static void tcg_target_qemu_prologue(TCGContext *s) { /* Calling convention requires us to save r4-r11 and lr; * save also r12 to maintain stack 8-alignment. */ /* stmdb sp!, { r4 - r12, lr } */ tcg_out32(s, (COND_AL << 28) | 0x092d5ff0); 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; /* ldmia sp!, { r4 - r12, pc } */ tcg_out32(s, (COND_AL << 28) | 0x08bd9ff0); }