AArch64 MP+fence+posrr-ctrlisb+BIS+BYTE "DMB.SYdWWb0b0 Rfeb0h0 PosRRh0b1 DpCtrlIsbdRb1b0 Freb0b0" { uint32_t y; uint32_t x; uint32_t 1:X3; uint32_t 1:X0; 0:X1=x; 0:X3=y; 1:X1=y; 1:X4=x; } P0 | P1 ; MOV W0,#1 | LDRH W0,[X1] ; STRB W0,[X1] | LDRB W2,[X1,#1] ; DMB SY | CBNZ W2,LC00 ; MOV W2,#1 | ISB ; STRB W2,[X3] | LDRB W3,[X4] ; |LC00: ; Observed 1:X3=0x0; 1:X2=0x0; 1:X0=0x1;