static bool kvmppc_inst_is_paired_single()

in kvm/book3s_paired_singles.c [344:478]

• 130 lines of code
• 95 McCabe index (conditional complexity)

static bool kvmppc_inst_is_paired_single(struct kvm_vcpu *vcpu, u32 inst)
{
	if (!(vcpu->arch.hflags & BOOK3S_HFLAG_PAIRED_SINGLE))
		return false;

	switch (get_op(inst)) {
	case OP_PSQ_L:
	case OP_PSQ_LU:
	case OP_PSQ_ST:
	case OP_PSQ_STU:
	case OP_LFS:
	case OP_LFSU:
	case OP_LFD:
	case OP_LFDU:
	case OP_STFS:
	case OP_STFSU:
	case OP_STFD:
	case OP_STFDU:
		return true;
	case 4:
		/* X form */
		switch (inst_get_field(inst, 21, 30)) {
		case OP_4X_PS_CMPU0:
		case OP_4X_PSQ_LX:
		case OP_4X_PS_CMPO0:
		case OP_4X_PSQ_LUX:
		case OP_4X_PS_NEG:
		case OP_4X_PS_CMPU1:
		case OP_4X_PS_MR:
		case OP_4X_PS_CMPO1:
		case OP_4X_PS_NABS:
		case OP_4X_PS_ABS:
		case OP_4X_PS_MERGE00:
		case OP_4X_PS_MERGE01:
		case OP_4X_PS_MERGE10:
		case OP_4X_PS_MERGE11:
			return true;
		}
		/* XW form */
		switch (inst_get_field(inst, 25, 30)) {
		case OP_4XW_PSQ_STX:
		case OP_4XW_PSQ_STUX:
			return true;
		}
		/* A form */
		switch (inst_get_field(inst, 26, 30)) {
		case OP_4A_PS_SUM1:
		case OP_4A_PS_SUM0:
		case OP_4A_PS_MULS0:
		case OP_4A_PS_MULS1:
		case OP_4A_PS_MADDS0:
		case OP_4A_PS_MADDS1:
		case OP_4A_PS_DIV:
		case OP_4A_PS_SUB:
		case OP_4A_PS_ADD:
		case OP_4A_PS_SEL:
		case OP_4A_PS_RES:
		case OP_4A_PS_MUL:
		case OP_4A_PS_RSQRTE:
		case OP_4A_PS_MSUB:
		case OP_4A_PS_MADD:
		case OP_4A_PS_NMSUB:
		case OP_4A_PS_NMADD:
			return true;
		}
		break;
	case 59:
		switch (inst_get_field(inst, 21, 30)) {
		case OP_59_FADDS:
		case OP_59_FSUBS:
		case OP_59_FDIVS:
		case OP_59_FRES:
		case OP_59_FRSQRTES:
			return true;
		}
		switch (inst_get_field(inst, 26, 30)) {
		case OP_59_FMULS:
		case OP_59_FMSUBS:
		case OP_59_FMADDS:
		case OP_59_FNMSUBS:
		case OP_59_FNMADDS:
			return true;
		}
		break;
	case 63:
		switch (inst_get_field(inst, 21, 30)) {
		case OP_63_MTFSB0:
		case OP_63_MTFSB1:
		case OP_63_MTFSF:
		case OP_63_MTFSFI:
		case OP_63_MCRFS:
		case OP_63_MFFS:
		case OP_63_FCMPU:
		case OP_63_FCMPO:
		case OP_63_FNEG:
		case OP_63_FMR:
		case OP_63_FABS:
		case OP_63_FRSP:
		case OP_63_FDIV:
		case OP_63_FADD:
		case OP_63_FSUB:
		case OP_63_FCTIW:
		case OP_63_FCTIWZ:
		case OP_63_FRSQRTE:
		case OP_63_FCPSGN:
			return true;
		}
		switch (inst_get_field(inst, 26, 30)) {
		case OP_63_FMUL:
		case OP_63_FSEL:
		case OP_63_FMSUB:
		case OP_63_FMADD:
		case OP_63_FNMSUB:
		case OP_63_FNMADD:
			return true;
		}
		break;
	case 31:
		switch (inst_get_field(inst, 21, 30)) {
		case OP_31_LFSX:
		case OP_31_LFSUX:
		case OP_31_LFDX:
		case OP_31_LFDUX:
		case OP_31_STFSX:
		case OP_31_STFSUX:
		case OP_31_STFX:
		case OP_31_STFUX:
		case OP_31_STFIWX:
			return true;
		}
		break;
	}

	return false;
}