Function PRFM_reg

arch/arm64/disassembler/decode2.c:19275–19339

prfm_reg.xml */

/* prfm_reg.xml */
int PRFM_reg(context *ctx, Instruction *instr)
{
	int rc = DECODE_STATUS_UNMATCHED;
	/* class iclass_general */
	/* size=11|111|V=0|00|opc=10|1|Rm=xxxxx|option=xxx|S=x|10|Rn=xxxxx|Rt=xxxxx */
	if((INSWORD & 0xFFE00C00)==0xF8A00800) {
		decode_fields32(ENC_PRFM_P_LDST_REGOFF, ctx, instr);
		ctx->wback = FALSE;
		ctx->postindex = FALSE;
		ctx->scale = UINT(ctx->size);
		if(SLICE(ctx->option,1,1)==0) {
			UNDEFINED;
		}
		ctx->extend_type = DecodeRegExtend(ctx->option);
		ctx->shift = (ctx->S==1) ? ctx->scale : 0;
		OK(ENC_PRFM_P_LDST_REGOFF);
	}
	/* post-decode pcode */
	ctx->n = UINT(ctx->Rn);
	ctx->t = UINT(ctx->Rt);
	ctx->m = UINT(ctx->Rm);
	ctx->acctype = ctx->AccType_NORMAL;
	if(SLICE(ctx->opc,1,1)==0) {
		if(SLICE(ctx->opc,0,0)==1) {
			ctx->memop = MemOp_LOAD;
		};
		if(ctx->size==3) {
			ctx->regsize = 0x40;
		};
		ctx->signed_ = FALSE;
	}
	else {
		if(ctx->size==3) {
			ctx->memop = MemOp_PREFETCH;
			if(SLICE(ctx->opc,0,0)==1) {
				UNDEFINED;
			}
		}
		else {
			ctx->memop = MemOp_LOAD;
			if(ctx->size==2 && SLICE(ctx->opc,0,0)==1) {
				UNDEFINED;
			}
			if(SLICE(ctx->opc,0,0)==1) {
				ctx->regsize = 0x20;
			};
			ctx->signed_ = TRUE;
		}
	}
	ctx->datasize = (8) << (ctx->scale);
	ctx->tag_checked = ctx->memop!=MemOp_PREFETCH;
	ctx->wb_unknown = FALSE;
	ctx->rt_unknown = FALSE;
	if(ctx->memop==MemOp_LOAD && ctx->wback && ctx->n==ctx->t && ctx->n!=0x1f) {
		// assignment from ConstrainUnpredictable()
		// assert
		// switch on constraint
	}