regdef.h

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#ifndef __alpha_regdef_h__
#define __alpha_regdef_h__

#define v0  $0  /* function return value */

#define t0  $1  /* temporary registers (caller-saved) */
#define t1  $2
#define t2  $3
#define t3  $4
#define t4  $5
#define t5  $6
#define t6  $7
#define t7  $8

#define s0  $9  /* saved-registers (callee-saved registers) */
#define s1  $10
#define s2  $11
#define s3  $12
#define s4  $13
#define s5  $14
#define s6  $15
#define fp  s6  /* frame-pointer (s6 in frame-less procedures) */

#define a0  $16 /* argument registers (caller-saved) */
#define a1  $17
#define a2  $18
#define a3  $19
#define a4  $20
#define a5  $21

#define t8  $22 /* more temps (caller-saved) */
#define t9  $23
#define t10 $24
#define t11 $25
#define ra  $26 /* return address register */
#define t12 $27

#define pv  t12 /* procedure-variable register */
#define AT  $at /* assembler temporary */
#define gp  $29 /* global pointer */
#define sp  $30 /* stack pointer */
#define zero    $31 /* reads as zero, writes are noops */

#endif /* __alpha_regdef_h__ */