Changeset 3699587 in sasmodels

Timestamp:

Feb 10, 2015 11:18:32 AM (10 years ago)

Author:

Paul Kienzle <pkienzle@…>

Branches:

master, core_shell_microgels, costrafo411, magnetic_model, release_v0.94, release_v0.95, ticket-1257-vesicle-product, ticket_1156, ticket_1265_superball, ticket_822_more_unit_tests

Children:

660cdd6

Parents:

34756fd

Message:

document double→float conversion internals

File:

• sasmodels/gen.py (modified) (1 diff)

sasmodels/gen.py

@@ -422 +422 @@
     Convert code from double precision to single precision.
     """
-    source = re.sub(r'(^|[^a-zA-Z0-9_])double($|[^a-zA-Z0-9_])',
+    # Convert double keyword to float.  Accept an 'n' parameter for vector
+    # values, where n is 2, 4, 8 or 16. Assume complex numbers are represented
+    # as cdouble which is typedef'd to double2.
+    source = re.sub(r'(^|[^a-zA-Z0-9_]c?)double(([248]|16)?($|[^a-zA-Z0-9_]))',
                     r'\1float\2', source)
+    # Convert floating point constants to single by adding 'f' to the end.
+    # OS/X driver complains if you don't do this.
     source = re.sub(r'[^a-zA-Z_](\d*[.]\d+|\d+[.]\d*)([eE][+-]?\d+)?',
                     r'\g<0>f', source)