Synthetic instructions

At this point, we've covered every instruction in the SPARC Version 8 instruction set. However, during system crash dump analysis, you may run into several additional SPARC instructions that are referred to as synthetic instructions. These instructions may be provided in a SPARC assembler for the convenience of assembly language programmers. They tend to be more suitable, some have easier-to-remember instruction names , and the syntax is often slimmed down. As you read the table, you'll see what we mean:

Table B-25. Common SPARC synthetic instructions

Synthetic Instruction	Actual Instruction	Description
jmp address	jmpl address , %g0	Jump
call address	jmpl address , %o7	Call a subroutine
tst reg	orcc %g0, reg , %g0	Test
ret	jmpl %i7+8, %g0	Return from subroutine
restore	restore %g0, %g0, %g0	Trivial restore
save	save %g0, %g0, %g0	Trivial save
set value, reg	sethi %hi (value), reg	When (value&0x1ffff)==0
	OR or %g0, value, reg	When (-4096<=value<=4095)
	OR sethi %hi (value), reg	Otherwise. Warning: Do not use
	or reg, %lo (value), reg	set as a delay instruction.
not s reg, dreg	xnor s reg , %g0, dreg	One's complement
not reg	xnor reg , %g0,	One's complement
neg s reg, dreg	sub %g0, reg, reg	Two's complement
neg reg	sub %g0, reg, reg	Two's complement
inc reg	add reg , 1, reg	Increment by 1
inc const13, reg	add reg, const13, reg	Increment by const13
inccc reg	addcc reg , 1,	Increment by 1 and set ICC
inccc const13, reg	addcc reg , const13,	Increment by const13 and set ICC
dec reg	sub reg , 1, reg	Decrement by 1
dec const13, reg	sub reg, const13, reg	Decrement by const13
deccc reg	subcc reg , 1,	Decrement by 1 and set ICC
deccc const13, reg	subcc reg, const13, reg	Decrement by const13 and set ICC
btst reg_or_imm, reg	andcc reg, reg_or_imm , %g0	Bit test
bset reg_or_imm, reg	or reg, reg_or_imm, reg	Bit set
bclr reg_or_imm, reg	andn reg , reg_or_imm , reg	Bit clear
btog reg_or_imm, reg	xor, reg_or_imm, reg	Bit toggle
clr reg	or %g0, %g0, reg	Clear (zero) register
clrb [ address ]	stb %g0, [ address ]	Clear byte
clrh [ address ]	sth %g0, [ address ]	Clear half-word
clr [ address ]	st %g0, [ address ]	Clear word
mov reg_or_imm, reg	or %g0, reg_or_imm, reg	Move value into register
mov %y, reg	rd %y, reg	Move %y into reg (Variations exist for %asm , %psr , %wim , %tbr )
mov reg_or_imm , %y	wr %g0, reg_or_imm , %y	Move reg into %y (Variations exist for %asm , %psr , %wim , %tbr )