First steps towards implementing ArrayBuffer &co in V8

src/macros.py

Index: src/macros.py
diff --git a/src/macros.py b/src/macros.py
index 52e87fcb13e9189f67f029b4e0ef17d6f7bb56fc..92ed437b0f6cbb44748e3649ce2dc41ac7b9c026 100644
--- a/src/macros.py
+++ b/src/macros.py
@@ -116,6 +116,7 @@ macro IS_ERROR(arg)             = (%_ClassOf(arg) === 'Error');
 macro IS_SCRIPT(arg)            = (%_ClassOf(arg) === 'Script');
 macro IS_ARGUMENTS(arg)         = (%_ClassOf(arg) === 'Arguments');
 macro IS_GLOBAL(arg)            = (%_ClassOf(arg) === 'global');
+macro IS_ARRAYBUFFER(arg)       = (%_ClassOf(arg) === '__ArrayBuffer');
 macro IS_UNDETECTABLE(arg)      = (%_IsUndetectableObject(arg));
 macro FLOOR(arg)                = $floor(arg);
 
@@ -142,6 +143,7 @@ const kBoundArgumentsStartIndex = 2;
 macro NUMBER_IS_NAN(arg) = (!%_IsSmi(%IS_VAR(arg)) && !(arg == arg));
 macro NUMBER_IS_FINITE(arg) = (%_IsSmi(%IS_VAR(arg)) || ((arg == arg) && (arg != 1/0) && (arg != -1/0)));
 macro TO_INTEGER(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToInteger(ToNumber(arg)));
+macro TO_POSITIVE_INTEGER(arg) = (%_IsSmi(%IS_VAR(arg)) ? (arg > 0 ? arg : 0) : %NumberToPositiveInteger(ToNumber(arg)));
 macro TO_INTEGER_MAP_MINUS_ZERO(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : %NumberToIntegerMapMinusZero(ToNumber(arg)));
 macro TO_INT32(arg) = (%_IsSmi(%IS_VAR(arg)) ? arg : (arg >> 0));
 macro TO_UINT32(arg) = (arg >>> 0);