NASM 0.91

1 files changed, 66 insertions, 0 deletions

diff --git a/insns.h b/insns.h
new file mode 100644
index 0000000..c42790d
--- /dev/null
+++ b/insns.h
@@ -0,0 +1,66 @@
+/* insns.h   header file for insns.c
+ *
+ * The Netwide Assembler is copyright (C) 1996 Simon Tatham and
+ * Julian Hall. All rights reserved. The software is
+ * redistributable under the licence given in the file "Licence"
+ * distributed in the NASM archive.
+ */
+
+#ifndef NASM_INSNS_H
+#define NASM_INSNS_H
+
+struct itemplate {
+    int opcode;			       /* the token, passed from "parser.c" */
+    int operands;		       /* number of operands */
+    long opd[3];		       /* bit flags for operand types */
+    char *code;			       /* the code it assembles to */
+    int flags;			       /* some flags */
+};
+
+/*
+ * Instruction template flags. These specify which processor
+ * targets the instruction is eligible for, whether it is
+ * privileged or undocumented, and also specify extra error
+ * checking on the matching of the instruction.
+ *
+ * IF_SM stands for Size Match: any operand whose size is not
+ * explicitly specified by the template is `really' intended to be
+ * the same size as the first size-specified operand.
+ * Non-specification is tolerated in the input instruction, but
+ * _wrong_ specification is not.
+ *
+ * IF_SM2 invokes Size Match on only the first _two_ operands, for
+ * three-operand instructions such as SHLD: it implies that the
+ * first two operands must match in size, but that the third is
+ * required to be _unspecified_.
+ *
+ * IF_SB invokes Size Byte: operands with unspecified size in the
+ * template are really bytes, and so no non-byte specification in
+ * the input instruction will be tolerated.
+ *
+ * IF_SD similarly invokes Size Doubleword.
+ *
+ * (The default state if neither IF_SM nor IF_SM2 is specified is
+ * that any operand with unspecified size in the template is
+ * required to have unspecified size in the instruction too...)
+ */
+
+#define IF_SM     0x0001	       /* size match */
+#define IF_SM2    0x0002	       /* size match first two operands */
+#define IF_SB     0x0004	       /* unsized operands can't be non-byte */
+#define IF_SD     0x0008	       /* unsized operands can't be nondword */
+#define IF_8086   0x0000	       /* 8086 instruction */
+#define IF_186    0x0010	       /* 186+ instruction */
+#define IF_286    0x0020	       /* 286+ instruction */
+#define IF_386    0x0030	       /* 386+ instruction */
+#define IF_486    0x0040	       /* 486+ instruction */
+#define IF_PENT   0x0050	       /* Pentium instruction */
+#define IF_P6     0x0060	       /* P6 instruction */
+#define IF_PMASK  0x00F0	       /* the mask for processor types */
+#define IF_PRIV   0x0100	       /* it's a privileged instruction */
+#define IF_UNDOC  0x0200	       /* it's an undocumented instruction */
+#define IF_FPU    0x0400	       /* it's an FPU instruction */
+#define IF_MMX    0x0800	       /* it's an MMX instruction */
+#define IF_ND     0x1000	       /* ignore this in the disassembler */
+
+#endif