#define LLVM_TARGET_ARM_ARMADDRESSINGMODES_H
#include "llvm/CodeGen/SelectionDAGNodes.h"
-#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include <cassert>
static inline const char *getShiftOpcStr(ShiftOpc Op) {
switch (Op) {
- default: llvm_unreachable("Unknown shift opc!");
+ default: assert(0 && "Unknown shift opc!");
case ARM_AM::asr: return "asr";
case ARM_AM::lsl: return "lsl";
case ARM_AM::lsr: return "lsr";
static inline const char *getAMSubModeStr(AMSubMode Mode) {
switch (Mode) {
- default: llvm_unreachable("Unknown addressing sub-mode!");
+ default: assert(0 && "Unknown addressing sub-mode!");
case ARM_AM::ia: return "ia";
case ARM_AM::ib: return "ib";
case ARM_AM::da: return "da";
static inline const char *getAMSubModeAltStr(AMSubMode Mode, bool isLD) {
switch (Mode) {
- default: llvm_unreachable("Unknown addressing sub-mode!");
+ default: assert(0 && "Unknown addressing sub-mode!");
case ARM_AM::ia: return isLD ? "fd" : "ea";
case ARM_AM::ib: return isLD ? "ed" : "fa";
case ARM_AM::da: return isLD ? "fa" : "ed";
return -1;
}
+ static inline unsigned getT2SOImmValRotate(unsigned V) {
+ if ((V & ~255U) == 0) return 0;
+ // Use CTZ to compute the rotate amount.
+ unsigned RotAmt = CountTrailingZeros_32(V);
+ return (32 - RotAmt) & 31;
+ }
+
+ static inline bool isT2SOImmTwoPartVal (unsigned Imm) {
+ unsigned V = Imm;
+ // Passing values can be any combination of splat values and shifter
+ // values. If this can be handled with a single shifter or splat, bail
+ // out. Those should be handled directly, not with a two-part val.
+ if (getT2SOImmValSplatVal(V) != -1)
+ return false;
+ V = rotr32 (~255U, getT2SOImmValRotate(V)) & V;
+ if (V == 0)
+ return false;
+
+ // If this can be handled as an immediate, accept.
+ if (getT2SOImmVal(V) != -1) return true;
+
+ // Likewise, try masking out a splat value first.
+ V = Imm;
+ if (getT2SOImmValSplatVal(V & 0xff00ff00U) != -1)
+ V &= ~0xff00ff00U;
+ else if (getT2SOImmValSplatVal(V & 0x00ff00ffU) != -1)
+ V &= ~0x00ff00ffU;
+ // If what's left can be handled as an immediate, accept.
+ if (getT2SOImmVal(V) != -1) return true;
+
+ // Otherwise, do not accept.
+ return false;
+ }
+
+ static inline unsigned getT2SOImmTwoPartFirst(unsigned Imm) {
+ assert (isT2SOImmTwoPartVal(Imm) &&
+ "Immedate cannot be encoded as two part immediate!");
+ // Try a shifter operand as one part
+ unsigned V = rotr32 (~255, getT2SOImmValRotate(Imm)) & Imm;
+ // If the rest is encodable as an immediate, then return it.
+ if (getT2SOImmVal(V) != -1) return V;
+
+ // Try masking out a splat value first.
+ if (getT2SOImmValSplatVal(Imm & 0xff00ff00U) != -1)
+ return Imm & 0xff00ff00U;
+
+ // The other splat is all that's left as an option.
+ assert (getT2SOImmValSplatVal(Imm & 0x00ff00ffU) != -1);
+ return Imm & 0x00ff00ffU;
+ }
+
+ static inline unsigned getT2SOImmTwoPartSecond(unsigned Imm) {
+ // Mask out the first hunk
+ Imm ^= getT2SOImmTwoPartFirst(Imm);
+ // Return what's left
+ assert (getT2SOImmVal(Imm) != -1 &&
+ "Unable to encode second part of T2 two part SO immediate");
+ return Imm;
+ }
+
//===--------------------------------------------------------------------===//
// Addressing Mode #2