Function LDRB_imm

arch/arm64/disassembler/decode2.c:14337–14413

ldrb_imm.xml */

/* ldrb_imm.xml */
int LDRB_imm(context *ctx, Instruction *instr)
{
	int rc = DECODE_STATUS_UNMATCHED;
	/* class iclass_post_indexed */
	/* size=00|111|V=0|00|opc=01|0|imm9=xxxxxxxxx|01|Rn=xxxxx|Rt=xxxxx */
	if((INSWORD & 0xFFE00C00)==0x38400400) {
		decode_fields32(ENC_LDRB_32_LDST_IMMPOST, ctx, instr);
		ctx->wback = TRUE;
		ctx->postindex = TRUE;
		ctx->scale = UINT(ctx->size);
		ctx->offset = SignExtend(ctx->imm9,9);
		OK(ENC_LDRB_32_LDST_IMMPOST);
	}
	/* class iclass_pre_indexed */
	/* size=00|111|V=0|00|opc=01|0|imm9=xxxxxxxxx|11|Rn=xxxxx|Rt=xxxxx */
	if((INSWORD & 0xFFE00C00)==0x38400C00) {
		decode_fields32(ENC_LDRB_32_LDST_IMMPRE, ctx, instr);
		ctx->wback = TRUE;
		ctx->postindex = FALSE;
		ctx->scale = UINT(ctx->size);
		ctx->offset = SignExtend(ctx->imm9,9);
		OK(ENC_LDRB_32_LDST_IMMPRE);
	}
	/* class iclass_unsigned_scaled_offset */
	/* size=00|111|V=0|01|opc=01|imm12=xxxxxxxxxxxx|Rn=xxxxx|Rt=xxxxx */
	if((INSWORD & 0xFFC00000)==0x39400000) {
		decode_fields32(ENC_LDRB_32_LDST_POS, ctx, instr);
		ctx->wback = FALSE;
		ctx->postindex = FALSE;
		ctx->scale = UINT(ctx->size);
		ctx->offset = LSL(ZeroExtend(ctx->imm12,0x40),ctx->scale);
		OK(ENC_LDRB_32_LDST_POS);
	}
	/* post-decode pcode */
	ctx->n = UINT(ctx->Rn);
	ctx->t = UINT(ctx->Rt);
	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) {
			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;
			};