diff options
Diffstat (limited to 'gas/config')
| -rw-r--r-- | gas/config/tc-i386.c | 146 |
1 files changed, 145 insertions, 1 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index e0c6964..b8fc3c4 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -416,6 +416,16 @@ struct _i386_insn /* Compressed disp8*N attribute. */ unsigned int memshift; + /* SCC = EVEX.[SC3,SC2,SC1,SC0]. */ + unsigned int scc; + + /* Store 4 bits of EVEX.[OF,SF,ZF,CF]. */ +#define OSZC_CF 1 +#define OSZC_ZF 2 +#define OSZC_SF 4 +#define OSZC_OF 8 + unsigned int oszc_flags; + /* Prefer load or store in encoding. */ enum { @@ -1929,6 +1939,110 @@ static INLINE bool need_evex_encoding (const insn_template *t) #define CPU_FLAGS_PERFECT_MATCH \ (CPU_FLAGS_ARCH_MATCH | CPU_FLAGS_64BIT_MATCH) +static INLINE bool set_oszc_flags (unsigned int oszc_shift) +{ + if (i.oszc_flags & oszc_shift) + { + as_bad (_("same oszc flag used twice")); + return false; + } + i.oszc_flags |= oszc_shift; + return true; +} + +/* Handle SCC OSZC flags. */ + +static int +check_Scc_OszcOperations (const char *l) +{ + const char *suffix_string = l; + + while (is_space_char (*suffix_string)) + suffix_string++; + + /* If {oszc flags} is absent, just return. */ + if (*suffix_string != '{') + return 0; + + /* Skip '{'. */ + suffix_string++; + + /* Parse 'dfv='. */ + while (is_space_char (*suffix_string)) + suffix_string++; + + if (strncasecmp (suffix_string, "dfv", 3) == 0) + suffix_string += 3; + else + { + as_bad (_("unrecognized pseudo-suffix")); + return -1; + } + + while (is_space_char (*suffix_string)) + suffix_string++; + + if (*suffix_string == '=') + suffix_string++; + else + { + as_bad (_("unrecognized pseudo-suffix")); + return -1; + } + + /* Parse 'of, sf, zf, cf}'. */ + while (*suffix_string) + { + while (is_space_char (*suffix_string)) + suffix_string++; + + /* Return for '{dfv=}'. */ + if (*suffix_string == '}') + return suffix_string + 1 - l; + + if (strncasecmp (suffix_string, "of", 2) == 0) + { + if (!set_oszc_flags (OSZC_OF)) + return -1; + } + else if (strncasecmp (suffix_string, "sf", 2) == 0) + { + if (!set_oszc_flags (OSZC_SF)) + return -1; + } + else if (strncasecmp (suffix_string, "zf", 2) == 0) + { + if (!set_oszc_flags (OSZC_ZF)) + return -1; + } + else if (strncasecmp (suffix_string, "cf", 2) == 0) + { + if (!set_oszc_flags (OSZC_CF)) + return -1; + } + else + { + as_bad (_("unrecognized oszc flags or illegal `,' in pseudo-suffix")); + return -1; + } + + suffix_string += 2; + + while (is_space_char (*suffix_string)) + suffix_string++; + + if (*suffix_string == '}') + return ++suffix_string - l; + + if (*suffix_string != ',') + break; + suffix_string ++; + } + + as_bad (_("missing `}' or `,' in pseudo-suffix")); + return -1; +} + /* Return CPU flags match bits. */ static int @@ -3793,10 +3907,19 @@ install_template (const insn_template *t) } } + /* For CCMP and CTEST the template has EVEX.SCC in base_opcode. Move it out of + there, to then adjust base_opcode to obtain its normal meaning. */ + if (i.tm.opcode_modifier.operandconstraint == SCC) + { + /* Get EVEX.SCC value from the lower 4 bits of base_opcode. */ + i.scc = i.tm.base_opcode & 0xf; + i.tm.base_opcode >>= 8; + } + /* Note that for pseudo prefixes this produces a length of 1. But for them the length isn't interesting at all. */ for (l = 1; l < 4; ++l) - if (!(t->base_opcode >> (8 * l))) + if (!(i.tm.base_opcode >> (8 * l))) break; i.opcode_length = l; @@ -4290,6 +4413,18 @@ build_apx_evex_prefix (void) || i.tm.opcode_modifier.operandconstraint == ZERO_UPPER) i.vex.bytes[3] |= 0x10; + /* Encode SCC and oszc flags bits. */ + if (i.tm.opcode_modifier.operandconstraint == SCC) + { + /* The default value of vvvv is 1111 and needs to be cleared. */ + i.vex.bytes[2] &= ~0x78; + i.vex.bytes[2] |= (i.oszc_flags << 3); + /* ND and aaa bits shold be 0. */ + know (!(i.vex.bytes[3] & 0x17)); + /* The default value of V' is 1 and needs to be cleared. */ + i.vex.bytes[3] = (i.vex.bytes[3] & ~0x08) | i.scc; + } + /* Encode the NF bit. */ if (i.has_nf) i.vex.bytes[3] |= 0x04; @@ -7428,6 +7563,15 @@ parse_insn (const char *line, char *mnemonic, bool prefix_only) } } + /* Handle SCC OSZC flgs. */ + if (current_templates.start->opcode_modifier.operandconstraint == SCC) + { + int length = check_Scc_OszcOperations (l); + if (length < 0) + return NULL; + l += length; + } + if (current_templates.start->opcode_modifier.jump == JUMP || current_templates.start->opcode_modifier.jump == JUMP_BYTE) { |