gwj / at91sam9263 · Commits

Commit 1b9d9ebb8a2efb780365214313625b7d717bca83

Authored by bellard
1 parent 1130328e

cmpxchg8b fix - added cmpxchg16b 

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4522 c046a42c-6fe2-441c-8c8c-71466251a162
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Showing 3 changed files with 47 additions and 7 deletions
target-i386/helper.c
  View file @1b9d9eb
... ... @@ -1879,8 +1879,8 @@ void helper_cmpxchg8b(target_ulong a0)
1879 1879  
1880 1880 eflags = cc_table[CC_OP].compute_all();
1881 1881 d = ldq(a0);
1882   - if (d == (((uint64_t)EDX << 32) | EAX)) {
1883   - stq(a0, ((uint64_t)ECX << 32) | EBX);
  1882 + if (d == (((uint64_t)EDX << 32) | (uint32_t)EAX)) {
  1883 + stq(a0, ((uint64_t)ECX << 32) | (uint32_t)EBX);
1884 1884 eflags |= CC_Z;
1885 1885 } else {
1886 1886 EDX = (uint32_t)(d >> 32);
... ... @@ -1890,6 +1890,28 @@ void helper_cmpxchg8b(target_ulong a0)
1890 1890 CC_SRC = eflags;
1891 1891 }
1892 1892  
  1893 +#ifdef TARGET_X86_64
  1894 +void helper_cmpxchg16b(target_ulong a0)
  1895 +{
  1896 + uint64_t d0, d1;
  1897 + int eflags;
  1898 +
  1899 + eflags = cc_table[CC_OP].compute_all();
  1900 + d0 = ldq(a0);
  1901 + d1 = ldq(a0 + 8);
  1902 + if (d0 == EAX && d1 == EDX) {
  1903 + stq(a0, EBX);
  1904 + stq(a0 + 8, ECX);
  1905 + eflags |= CC_Z;
  1906 + } else {
  1907 + EDX = d1;
  1908 + EAX = d0;
  1909 + eflags &= ~CC_Z;
  1910 + }
  1911 + CC_SRC = eflags;
  1912 +}
  1913 +#endif
  1914 +
1893 1915 void helper_single_step(void)
1894 1916 {
1895 1917 env->dr[6] |= 0x4000;
... ...
target-i386/helper.h
  View file @1b9d9eb
... ... @@ -75,6 +75,9 @@ void helper_boundl(target_ulong a0, int v);
75 75 void helper_rsm(void);
76 76 void helper_into(int next_eip_addend);
77 77 void helper_cmpxchg8b(target_ulong a0);
  78 +#ifdef TARGET_X86_64
  79 +void helper_cmpxchg16b(target_ulong a0);
  80 +#endif
78 81 void helper_single_step(void);
79 82 void helper_cpuid(void);
80 83 void helper_rdtsc(void);
... ...
target-i386/translate.c
  View file @1b9d9eb
... ... @@ -4333,11 +4333,26 @@ static target_ulong disas_insn(DisasContext *s, target_ulong pc_start)
4333 4333 mod = (modrm >> 6) & 3;
4334 4334 if ((mod == 3) || ((modrm & 0x38) != 0x8))
4335 4335 goto illegal_op;
4336   - gen_jmp_im(pc_start - s->cs_base);
4337   - if (s->cc_op != CC_OP_DYNAMIC)
4338   - gen_op_set_cc_op(s->cc_op);
4339   - gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
4340   - tcg_gen_helper_0_1(helper_cmpxchg8b, cpu_A0);
  4336 +#ifdef TARGET_X86_64
  4337 + if (dflag == 2) {
  4338 + if (!(s->cpuid_ext_features & CPUID_EXT_CX16))
  4339 + goto illegal_op;
  4340 + gen_jmp_im(pc_start - s->cs_base);
  4341 + if (s->cc_op != CC_OP_DYNAMIC)
  4342 + gen_op_set_cc_op(s->cc_op);
  4343 + gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
  4344 + tcg_gen_helper_0_1(helper_cmpxchg16b, cpu_A0);
  4345 + } else
  4346 +#endif
  4347 + {
  4348 + if (!(s->cpuid_features & CPUID_CX8))
  4349 + goto illegal_op;
  4350 + gen_jmp_im(pc_start - s->cs_base);
  4351 + if (s->cc_op != CC_OP_DYNAMIC)
  4352 + gen_op_set_cc_op(s->cc_op);
  4353 + gen_lea_modrm(s, modrm, &reg_addr, &offset_addr);
  4354 + tcg_gen_helper_0_1(helper_cmpxchg8b, cpu_A0);
  4355 + }
4341 4356 s->cc_op = CC_OP_EFLAGS;
4342 4357 break;
4343 4358  
... ...