This function was named exactly backwards (it incremented only when
*not* signed). Investigating this naming error revealed that the call
site was also unclear: `incIfSigned` was called from a block where
`signed` was known to be False). So, I inlined the logic in the one
place where it was actually used, and removed the function.
The default initializer for a float types initializes the value to `0`
by calling a “builtin” function to convert an integer with value `0`
into an “FPIEEE” float with value `0`. The integer value is signed, but
the code was calling a function that expected an unsigned integer.
This reflects the fact that the attribute's only for compiler-internal use, and isn't really equivalent to C's asm attribute, since it doesn't change the calling convention to be C-compatible.
This brings the David Owens benchmark from http://owensd.io/2015/06/27/performance-xcode7-beta-2.html from parity with simd.h-based C to 3x faster.
Before:
RenderGradient ([UInt32].withUnsafeMutablePointer (SIMD)) │ 7.035851 │ 6.304739 │ 9.815832 │ 1.212 │
After:
RenderGradient ([UInt32].withUnsafeMutablePointer (SIMD)) │ 2.318357 │ 2.223325 │ 2.697981 │ 0.1490 │
This also addresses rdar://problem/21574425, since Builtin.add_VecNxIntM isn't overflow-checked, and overflow checks really aren't wanted when working with vector types directly.
Reapplying now that Nadav's fixed the ARM64 SelectionDAG issue this exposed before, and Arnold's fixed
yet another SelectionDAG issue exposed after that.
Swift SVN r30006
Revert "simd overlay: Use LLVM vector types."
This reverts commit r29922 and r29924.
More arm64 instruction selection errors.
rdar://21703486
Swift SVN r29941
This brings the David Owens benchmark from http://owensd.io/2015/06/27/performance-xcode7-beta-2.html from parity with simd.h-based C to 3x faster.
Before:
RenderGradient ([UInt32].withUnsafeMutablePointer (SIMD)) │ 7.035851 │ 6.304739 │ 9.815832 │ 1.212 │
After:
RenderGradient ([UInt32].withUnsafeMutablePointer (SIMD)) │ 2.318357 │ 2.223325 │ 2.697981 │ 0.1490 │
This also addresses rdar://problem/21574425, since Builtin.add_VecNxIntM isn't overflow-checked, and overflow checks really aren't wanted when working with vector types directly.
Reapplying now that Nadav's fixed the ARM64 SelectionDAG issue this exposed before.
Swift SVN r29922
This brings the David Owens benchmark from http://owensd.io/2015/06/27/performance-xcode7-beta-2.html from parity with simd.h-based C to 3x faster.
Before:
RenderGradient ([UInt32].withUnsafeMutablePointer (SIMD)) │ 7.035851 │ 6.304739 │ 9.815832 │ 1.212 │
After:
RenderGradient ([UInt32].withUnsafeMutablePointer (SIMD)) │ 2.318357 │ 2.223325 │ 2.697981 │ 0.1490 │
This also addresses rdar://problem/21574425, since Builtin.add_VecNxIntM isn't overflow-checked, and overflow checks really aren't wanted when working with vector types directly.
Swift SVN r29891
The standard library has grown significantly, and we need a new
directory structure that clearly reflects the role of the APIs, and
allows future growth.
See stdlib/{public,internal,private}/README.txt for more information.
Swift SVN r25876
