back if interrupted RET crash: MOVD $0, (R0) RET // func ghashAsm(key *gcmHashKey, hash *[16]byte, data []byte) TEXT ·ghashAsm(SB),NOSPLIT,$32-40 MOVD $65, R0 // GHASH function code MOVD key+0(FP), R2 LMG (R2), R6, R7 MOVD hash+8(FP), R8 LMG (R8), R4, R5 MOVD $params-32(SP), R1 STMG R4, R7, (R1) LMG data+16(FP), R2, R3 // R2=base, R3=len loop: KIMD R0, R2 // compute intermediate message digest (KIMD) BVS loop // branch back if interrupted MVC $16, (R1), (R8) MOVD $0, R0 RET // func kmaGCM(fn int,...