--- ../../../cs340/spring01/prog4/mips.h	Wed Mar 28 21:12:32 2001
+++ mips.h	Thu Mar 29 16:06:41 2001
@@ -1,3 +1,14 @@
+/* Set __BYTE_ORDER. */
+#include <sys/types.h>
+#ifndef __BYTE_ORDER
+#define LITTLE_ENDIAN 1234
+#ifdef _BIG_ENDIAN
+#define __BYTE_ORDER 4321
+#else
+#define __BYTE_ORDER 1234
+#endif
+#endif
+
 //---------------------------------------------------------------
 //                            CLASS 0
 //---------------------------------------------------------------
@@ -19,9 +30,15 @@
 // Instructions: mfhi,  mflo
 // Pattern: 000000 & 00000 & 00000 &    rd & 00000 & 010000 & mfhi 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:16;
   unsigned int rd:5;
   unsigned int bitsB:11;
+#else
+  unsigned int bitsA:11;
+  unsigned int rd:5;
+  unsigned int bitsB:16;
+#endif
 } CLASS1;
 
 //  000000 00000 00000 rd 00000 010000 mfhi 
@@ -42,9 +59,15 @@
 // Instructions: mthi, mtlo, jr
 // Pattern: 000000 & rs    & 00000 & 00000 & 00000 & 010001 & mthi 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int bitsB:21;
+#else
+  unsigned int bitsA:21;
+  unsigned int rs:5;
+  unsigned int bitsB:6;
+#endif
 } CLASS2;
 
 //  000000 rs 00000 00000 00000 010001 mthi 
@@ -71,10 +94,17 @@
 // Pattern: 000000 & rs & rt    & 00000 & 00000 & 011000 & mult 
 // Instructions: mult, multu, div, divu
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int rt:5;
   unsigned int bitsB:16;
+#else
+  unsigned int bitsA:16;
+  unsigned int rt:5;
+  unsigned int rs:5;
+  unsigned int bitsB:6;
+#endif
 } CLASS3;
 
 //  000000 rs rt 00000 00000 011000 mult 
@@ -107,11 +137,19 @@
 // Instructions: jalr
 // Pattern: 000000 & rs & 00000 & rd    & 00000 & 001001 & jalr 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int bitsB:5;
   unsigned int rd:5;
   unsigned int bitsC:11;
+#else
+  unsigned int bitA:11;
+  unsigned int rd:5;
+  unsigned int bitB:5;
+  unsigned int rs:5;
+  unsigned int bitC:6;
+#endif
 } CLASS4;
 
 //  000000 rs 00000 rd 00000 001001 jalr 
@@ -126,11 +164,19 @@
 // Instructions: sllv, srlv, srav, add, addu, sub, subu, and, or, xor, nor, slt, sltu
 // Pattern: 000000 & rs & rt & rd & 00000 & 000100 & sllv 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int rt:5;
   unsigned int rd:5;
   unsigned int bitsB:11;
+#else
+  unsigned int bitsA:11;
+  unsigned int rd:5;
+  unsigned int rt:5;
+  unsigned int rs:5;
+  unsigned int bitsB:11;
+#endif
 } CLASS5;
 
 //  000000 rs rt rd 00000 000100 sllv 
@@ -217,11 +263,19 @@
 // Pattern: 000000 & 00000 & rt & rd & imm5 & 000000 & sll  
 // Instructions: sll, srl, sra
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:11;
   unsigned int rt:5;
   unsigned int rd:5;
   unsigned int imm5:5;
   unsigned int bitsB:6;
+#else
+  unsigned int bitsA:6;
+  unsigned int imm5:5;
+  unsigned int rd:5;
+  unsigned int rt:5;
+  unsigned int bitsB:6;
+#endif
 } CLASS6;
 
 //  000000 00000 rt rd imm5 000000 sll 
@@ -248,12 +302,20 @@
 // Instructions: bltz, bgez, bltzal, bgezal, blez, bgtz
 // Pattern: 000001 & rs & 00000 & imm16 & bltz 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int bitsB:5;
   int imm16:16;
+#else
+  int imm16:16;
+  unsigned int bitsA:5;
+  unsigned int rs:5;
+  unsigned int bitsB:6;
+#endif
 } CLASS7;
 
+
 //  000001 rs 00000 imm16 bltz 
 #define	bltz_MASK	0xfc1f0000
 #define	bltz_VALUE	0x4000000
@@ -296,10 +358,17 @@
 // Pattern: 000100 & rs & rt & imm16 & addi 
 // Instructions: addi, slti, andi, ori, xori
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int rt:5;
   int imm16:16;
+#else
+  int imm16:16;
+  unsigned int rt:5;
+  unsigned int rs:5;
+  unsigned int bitsA:6;
+#endif
 } CLASS8;
 
 //  001000 rs rt imm16 addi
@@ -338,10 +407,17 @@
 // Instructions: addiu, sltiu
 // Pattern: 001001 & rs & rt & imm16 & addiu
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int rt:5;
   unsigned int imm16:16;
+#else
+  unsigned int imm16:16;
+  unsigned int rt:5;
+  unsigned int rs:5;
+  unsigned int bitsA:6;
+#endif
 } CLASS9;
 
 //  001001 rs rt imm16 addiu
@@ -362,8 +438,13 @@
 // Instructions: j, jal
 // Pattern: 000010 & imm26 & j
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int imm26:26;
+#else
+  unsigned int imm26:26;
+  unsigned int bitsA:6;
+#endif
 } CLASS10;
 
 //  000010 imm26 j
@@ -401,10 +482,17 @@
 // Instructions: lb, lh, lwl, lw, lbu, lhu, lwr, sb, sh, swl, sw, swr
 // Pattern: 101011 & rs & rt & imm16 & sw 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int rt:5;
   int imm16:16;
+#else
+  int imm16:16;
+  unsigned int rt:5;
+  unsigned int rs:5;
+  unsigned int bitsA:6;
+#endif
 } CLASS12;
 
 //  100000 rs rt imm16 lb 
@@ -485,10 +573,17 @@
 // Instructions: beq, bne
 // Pattern: 000100 & rs & rt & imm16 & beq 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:6;
   unsigned int rs:5;
   unsigned int rt:5;
   int imm16:16;
+#else
+  int imm16:16;
+  unsigned int rt:5;
+  unsigned int rs:5;
+  unsigned int bitsA:6;
+#endif
 } CLASS13;
 
 //  000100 rs rt imm16 beq 
@@ -509,9 +604,15 @@
 // Instructions: lui
 //  00111100000 rt imm16 lui 
 typedef struct {
+#if (__BYTE_ORDER != LITTLE_ENDIAN)
   unsigned int bitsA:11;
   unsigned int rt:5;
   int imm16:16;
+#else
+  int imm16:16;
+  unsigned int rt:5;
+  unsigned int bitsA:11;
+#endif
 } CLASS14;
 
 //  00111100000 rt imm16 lui