intrinsics: Add degrees() and radians()

Fixed: tint:1329
Change-Id: I5fb927268fc9cb8047a2b365d26e813a8546605a
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/75423
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>

src/sem/intrinsic.h

@@ -145,6 +145,12 @@ class Intrinsic : public Castable<Intrinsic, CallTarget> {
   const bool is_deprecated_;
 };
 
+/// Constant value used by the degrees() intrinsic
+static constexpr double kRadToDeg = 57.295779513082322865;
+
+/// Constant value used by the radians() intrinsic
+static constexpr double kDegToRad = 0.017453292519943295474;
+
 }  // namespace sem
 }  // namespace tint
 

src/sem/intrinsic_type.cc

@@ -72,6 +72,9 @@ IntrinsicType ParseIntrinsicType(const std::string& name) {
   if (name == "cross") {
     return IntrinsicType::kCross;
   }
+  if (name == "degrees") {
+    return IntrinsicType::kDegrees;
+  }
   if (name == "determinant") {
     return IntrinsicType::kDeterminant;
   }
@@ -192,6 +195,9 @@ IntrinsicType ParseIntrinsicType(const std::string& name) {
   if (name == "pow") {
     return IntrinsicType::kPow;
   }
+  if (name == "radians") {
+    return IntrinsicType::kRadians;
+  }
   if (name == "reflect") {
     return IntrinsicType::kReflect;
   }
@@ -368,6 +374,8 @@ const char* str(IntrinsicType i) {
       return "countOneBits";
     case IntrinsicType::kCross:
       return "cross";
+    case IntrinsicType::kDegrees:
+      return "degrees";
     case IntrinsicType::kDeterminant:
       return "determinant";
     case IntrinsicType::kDistance:
@@ -448,6 +456,8 @@ const char* str(IntrinsicType i) {
       return "pack4x8unorm";
     case IntrinsicType::kPow:
       return "pow";
+    case IntrinsicType::kRadians:
+      return "radians";
     case IntrinsicType::kReflect:
       return "reflect";
     case IntrinsicType::kRefract:

src/sem/intrinsic_type.h

@@ -48,6 +48,7 @@ enum class IntrinsicType {
   kCosh,
   kCountOneBits,
   kCross,
+  kDegrees,
   kDeterminant,
   kDistance,
   kDot,
@@ -88,6 +89,7 @@ enum class IntrinsicType {
   kPack4x8snorm,
   kPack4x8unorm,
   kPow,
+  kRadians,
   kReflect,
   kRefract,
   kReverseBits,