diff options
Diffstat (limited to 'gas/config/tc-i386.c')
| -rw-r--r-- | gas/config/tc-i386.c | 24 |
1 files changed, 6 insertions, 18 deletions
diff --git a/gas/config/tc-i386.c b/gas/config/tc-i386.c index f346ed2..df00e66 100644 --- a/gas/config/tc-i386.c +++ b/gas/config/tc-i386.c @@ -2826,6 +2826,11 @@ md_assemble (line) /* Output normal instructions here. */ unsigned char *q; + /* All opcodes on i386 have eighter 1 or 2 bytes. We may use third + byte for the SSE instructions to specify prefix they require. */ + if (i.tm.base_opcode & 0xff0000) + add_prefix ((i.tm.base_opcode >> 16) & 0xff); + /* The prefix bytes. */ for (q = i.prefix; q < i.prefix + sizeof (i.prefix) / sizeof (i.prefix[0]); @@ -2845,7 +2850,7 @@ md_assemble (line) insn_size += 1; FRAG_APPEND_1_CHAR (i.tm.base_opcode); } - else if (fits_in_unsigned_word (i.tm.base_opcode)) + else { insn_size += 2; p = frag_more (2); @@ -2853,23 +2858,6 @@ md_assemble (line) *p++ = (i.tm.base_opcode >> 8) & 0xff; *p = i.tm.base_opcode & 0xff; } - else - { /* Opcode is either 3 or 4 bytes. */ - if (i.tm.base_opcode & 0xff000000) - { - insn_size += 4; - p = frag_more (4); - *p++ = (i.tm.base_opcode >> 24) & 0xff; - } - else - { - insn_size += 3; - p = frag_more (3); - } - *p++ = (i.tm.base_opcode >> 16) & 0xff; - *p++ = (i.tm.base_opcode >> 8) & 0xff; - *p = (i.tm.base_opcode) & 0xff; - } /* Now the modrm byte and sib byte (if present). */ if (i.tm.opcode_modifier & Modrm) |