Function BFM

arch/arm64/disassembler/decode2.c:1075–1119

bfm.xml */

/* bfm.xml */
int BFM(context *ctx, Instruction *instr)
{
	int rc = DECODE_STATUS_UNMATCHED;
	/* class iclass_nofill */
	/* sf=x|opc=01|100110|N=x|immr=xxxxxx|imms=xxxxxx|Rn=xxxxx|Rd=xxxxx */
	if((INSWORD & 0x7F800000)==0x33000000) {
		decode_fields32(ENC_BFM_32M_BITFIELD, ctx, instr);
		ctx->d = UINT(ctx->Rd);
		ctx->n = UINT(ctx->Rn);
		ctx->datasize = (ctx->sf==1) ? 0x40 : 0x20;
		if(!ctx->opc) {
			ctx->inzero = TRUE;
			ctx->extend = TRUE;
		}
		else if(ctx->opc==1) {
			ctx->inzero = FALSE;
			ctx->extend = FALSE;
		}
		else if(ctx->opc==2) {
			ctx->inzero = TRUE;
			ctx->extend = FALSE;
		}
		else if(ctx->opc==3) {
			UNDEFINED;
		}
		if(ctx->sf==1 && ctx->N!=1) {
			UNDEFINED;
		}
		if(ctx->sf==0 && (ctx->N!=0 || SLICE(ctx->immr,5,5)!=0 || SLICE(ctx->imms,5,5)!=0)) {
			UNDEFINED;
		}
		ctx->R = UINT(ctx->immr);
		ctx->S = UINT(ctx->imms);
		DecodeBitMasks_ReturnType dbmrt = DecodeBitMasks(ctx->N,ctx->imms,ctx->immr);
		ctx->wmask = dbmrt.wmask;
		ctx->tmask = dbmrt.tmask;
		/* regular aliases */
		if(ctx->Rn==0x1f && UINT(ctx->imms)<UINT(ctx->immr)) return BFC_BFM(ctx, instr);
		if(ctx->Rn!=0x1f && UINT(ctx->imms)<UINT(ctx->immr)) return BFI_BFM(ctx, instr);
		if((UINT(ctx->imms)) >= (UINT(ctx->immr))) return BFXIL_BFM(ctx, instr);
		if(ctx->sf==0 && ctx->N==0) OK(ENC_BFM_32M_BITFIELD);
		if(ctx->sf==1 && ctx->N==1) OK(ENC_BFM_64M_BITFIELD);
	}
	return rc;
}

/* bfmlal_advsimd_elt.xml */
int BFMLAL_advsimd_elt(context *ctx, Instruction *instr)