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Rev 1790 Rev 1856
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	mov	%g0, %o0		! return 0 on failure
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	mov	%g0, %o0		! return 0 on failure
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memsetb:
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memsetb:
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	b _memsetb
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	b _memsetb
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	nop
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	nop
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.macro WRITE_ALTERNATE_REGISTER reg, bit
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	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
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	rdpr %pstate, %l0
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	wrpr %l0, \bit, %pstate
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	mov %i0, \reg
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	wrpr %l0, 0, %pstate
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	ret
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	restore
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.endm
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.macro READ_ALTERNATE_REGISTER reg, bit
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	save %sp, -STACK_WINDOW_SAVE_AREA_SIZE, %sp
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	rdpr %pstate, %l0
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	wrpr %l0, \bit, %pstate
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	mov \reg, %i0
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	wrpr %l0, 0, %pstate
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	ret
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	restore
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.endm
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.global write_to_ag_g6
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write_to_ag_g6:
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	WRITE_ALTERNATE_REGISTER %g6, PSTATE_AG_BIT
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.global write_to_ag_g7
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write_to_ag_g7:
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	WRITE_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT
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.global write_to_ig_g6
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write_to_ig_g6:
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	WRITE_ALTERNATE_REGISTER %g6, PSTATE_IG_BIT
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.global read_from_ag_g7
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read_from_ag_g7:
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	READ_ALTERNATE_REGISTER %g7, PSTATE_AG_BIT