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fix in cmpxchg instruction; i486 book is wrong

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ceriel 1996-04-25 08:38:05 +00:00
parent 6ec3dd7ebd
commit 740f1d5f75
2 changed files with 4 additions and 4 deletions
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4
mach/i386/as/mach3.c
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@ -411,8 +411,8 @@
/* Intel 486 instructions */ /* Intel 486 instructions */
0, EXTOPBW, 0xC0, "xaddb", 0, EXTOPBW, 0xC0, "xaddb",
0, EXTOPBW, 0xC1, "xadd", 0, EXTOPBW, 0xC1, "xadd",
0, EXTOPBW, 0xA6, "cmpxchgb", 0, EXTOPBW, 0xB0, "cmpxchgb",
0, EXTOPBW, 0xA7, "cmpxchg", 0, EXTOPBW, 0xB1, "cmpxchg",
0, BSWAP, 0xC8, "bswap", 0, BSWAP, 0xC8, "bswap",
0, NOOP_2, 017+(010<<8), "invd", 0, NOOP_2, 017+(010<<8), "invd",
0, EXTOP1, 071, "invlpg", 0, EXTOP1, 071, "invlpg",

4
mach/i386/as/mach4.c
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@ -199,9 +199,9 @@ oper : NOOP_1
/* 486 instructions */ /* 486 instructions */
| BSWAP R32 | BSWAP R32
{ emit1(0xF); emit1($1|$2); } { emit1(0xF); emit1($1|$2); }
| EXTOPBW reg ',' ea_2 | EXTOPBW ea_2 ',' reg
{ regsize($1); { regsize($1);
emit1(0xF); emit1($1); ea_2($2<<3); emit1(0xF); emit1($1); ea_2($4<<3);
} }
; ;