4 Commits

Author	SHA1	Message	Date
Tim Northover	12817862f1	R600: rename misleading fp16 test. ... This test is actually going in the opposite direction to what the filename and function name suggested. llvm-svn: 213358	2014-07-18 08:43:30 +00:00
Tim Northover	f861de3d7b	R600: support f16 -> f64 conversion intrinsic. ... Unfortunately, we don't seem to have a direct truncation, but the extension can be legally split into two operations so we should support that. llvm-svn: 213357	2014-07-18 08:43:24 +00:00
Tim Northover	fd7e424935	CodeGen: extend f16 conversions to permit types > float. ... This makes the two intrinsics @llvm.convert.from.f16 and @llvm.convert.to.f16 accept types other than simple "float". This is only strictly needed for the truncate operation, since otherwise double rounding occurs and there's no way to represent the strict IEEE conversion. However, for symmetry we allow larger types in the extend too. During legalization, we can expand an "fp16_to_double" operation into two extends for convenience, but abort when the truncate isn't legal. A new libcall is probably needed here. Even after this commit, various target tweaks are needed to actually use the extended intrinsics. I've put these into separate commits for clarity, so there are no actual tests of f64 conversion here. llvm-svn: 213248	2014-07-17 10:51:23 +00:00
Matt Arsenault	b0df92577d	R600/SI: Add support for llvm.convert.{to|from}.fp16 ... llvm-svn: 212676	2014-07-10 03:22:20 +00:00