From 7bc70a8e576bfebc3e3b50a5866527e246a40e4d Mon Sep 17 00:00:00 2001 From: Jan Hubicka Date: Fri, 5 Jan 2001 12:30:12 +0000 Subject: * tc-i386.c (md_assemble): Handle third byte of the opcode as prefix. * i386.h (i386_optab): Make [sml]fence template to use immext field. --- gas/config/tc-i386.c | 24 ++++++------------------ 1 file changed, 6 insertions(+), 18 deletions(-) (limited to 'gas/config') 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) -- cgit v1.1