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  2. github.com/golang/go

    src/internal/runtime/atomic/atomic_s390x.s 

    	MOVD	$(3<<3), R5
	RXSBG	$59, $60, $3, R3, R5 // R5 = 24 - ((addr % 4) * 8) = ((addr & 3) << 3) ^ (3 << 3)
	ANDW	$~3, R3              // R3 = floor(addr, 4) = addr &^ 3
	RLL	R5, R4, R4           // R4 = rotl(R4, R5)
	LAN	R4, R6, 0(R3)        // R6 = *R3; *R3 &= R4; (atomic)
	RET

// func Or(addr *uint32, v uint32)
TEXT ·Or(SB), NOSPLIT, $0-12
	MOVD	ptr+0(FP), R3
	MOVW	val+8(FP), R4
    Registered: Wed Jun 12 16:32:35 UTC 2024
    - Last Modified: Mon Mar 25 19:53:03 UTC 2024
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