diff options
Diffstat (limited to 'target-arm/translate.c')
| -rw-r--r-- | target-arm/translate.c | 136 |
1 files changed, 69 insertions, 67 deletions
diff --git a/target-arm/translate.c b/target-arm/translate.c index db63c6ef7d..e16c113348 100644 --- a/target-arm/translate.c +++ b/target-arm/translate.c @@ -6601,6 +6601,70 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2, } #endif +/* gen_srs: + * @env: CPUARMState + * @s: DisasContext + * @mode: mode field from insn (which stack to store to) + * @amode: addressing mode (DA/IA/DB/IB), encoded as per P,U bits in ARM insn + * @writeback: true if writeback bit set + * + * Generate code for the SRS (Store Return State) insn. + */ +static void gen_srs(DisasContext *s, + uint32_t mode, uint32_t amode, bool writeback) +{ + int32_t offset; + TCGv_i32 addr = tcg_temp_new_i32(); + TCGv_i32 tmp = tcg_const_i32(mode); + gen_helper_get_r13_banked(addr, cpu_env, tmp); + tcg_temp_free_i32(tmp); + switch (amode) { + case 0: /* DA */ + offset = -4; + break; + case 1: /* IA */ + offset = 0; + break; + case 2: /* DB */ + offset = -8; + break; + case 3: /* IB */ + offset = 4; + break; + default: + abort(); + } + tcg_gen_addi_i32(addr, addr, offset); + tmp = load_reg(s, 14); + gen_st32(tmp, addr, 0); + tmp = load_cpu_field(spsr); + tcg_gen_addi_i32(addr, addr, 4); + gen_st32(tmp, addr, 0); + if (writeback) { + switch (amode) { + case 0: + offset = -8; + break; + case 1: + offset = 4; + break; + case 2: + offset = -4; + break; + case 3: + offset = 0; + break; + default: + abort(); + } + tcg_gen_addi_i32(addr, addr, offset); + tmp = tcg_const_i32(mode); + gen_helper_set_r13_banked(cpu_env, tmp, addr); + tcg_temp_free_i32(tmp); + } + tcg_temp_free_i32(addr); +} + static void disas_arm_insn(CPUARMState * env, DisasContext *s) { unsigned int cond, insn, val, op1, i, shift, rm, rs, rn, rd, sh; @@ -6693,49 +6757,11 @@ static void disas_arm_insn(CPUARMState * env, DisasContext *s) } } else if ((insn & 0x0e5fffe0) == 0x084d0500) { /* srs */ - int32_t offset; - if (IS_USER(s)) + if (IS_USER(s)) { goto illegal_op; - ARCH(6); - op1 = (insn & 0x1f); - addr = tcg_temp_new_i32(); - tmp = tcg_const_i32(op1); - gen_helper_get_r13_banked(addr, cpu_env, tmp); - tcg_temp_free_i32(tmp); - i = (insn >> 23) & 3; - switch (i) { - case 0: offset = -4; break; /* DA */ - case 1: offset = 0; break; /* IA */ - case 2: offset = -8; break; /* DB */ - case 3: offset = 4; break; /* IB */ - default: abort(); } - if (offset) - tcg_gen_addi_i32(addr, addr, offset); - tmp = load_reg(s, 14); - gen_st32(tmp, addr, 0); - tmp = load_cpu_field(spsr); - tcg_gen_addi_i32(addr, addr, 4); - gen_st32(tmp, addr, 0); - if (insn & (1 << 21)) { - /* Base writeback. */ - switch (i) { - case 0: offset = -8; break; - case 1: offset = 4; break; - case 2: offset = -4; break; - case 3: offset = 0; break; - default: abort(); - } - if (offset) - tcg_gen_addi_i32(addr, addr, offset); - tmp = tcg_const_i32(op1); - gen_helper_set_r13_banked(cpu_env, tmp, addr); - tcg_temp_free_i32(tmp); - tcg_temp_free_i32(addr); - } else { - tcg_temp_free_i32(addr); - } - return; + ARCH(6); + gen_srs(s, (insn & 0x1f), (insn >> 23) & 3, insn & (1 << 21)); } else if ((insn & 0x0e50ffe0) == 0x08100a00) { /* rfe */ int32_t offset; @@ -8180,32 +8206,8 @@ static int disas_thumb2_insn(CPUARMState *env, DisasContext *s, uint16_t insn_hw gen_rfe(s, tmp, tmp2); } else { /* srs */ - op = (insn & 0x1f); - addr = tcg_temp_new_i32(); - tmp = tcg_const_i32(op); - gen_helper_get_r13_banked(addr, cpu_env, tmp); - tcg_temp_free_i32(tmp); - if ((insn & (1 << 24)) == 0) { - tcg_gen_addi_i32(addr, addr, -8); - } - tmp = load_reg(s, 14); - gen_st32(tmp, addr, 0); - tcg_gen_addi_i32(addr, addr, 4); - tmp = tcg_temp_new_i32(); - gen_helper_cpsr_read(tmp, cpu_env); - gen_st32(tmp, addr, 0); - if (insn & (1 << 21)) { - if ((insn & (1 << 24)) == 0) { - tcg_gen_addi_i32(addr, addr, -4); - } else { - tcg_gen_addi_i32(addr, addr, 4); - } - tmp = tcg_const_i32(op); - gen_helper_set_r13_banked(cpu_env, tmp, addr); - tcg_temp_free_i32(tmp); - } else { - tcg_temp_free_i32(addr); - } + gen_srs(s, (insn & 0x1f), (insn & (1 << 24)) ? 1 : 2, + insn & (1 << 21)); } } else { int i, loaded_base = 0; |