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@@ -1,3 +1,63 @@
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=== v1.5.0 === (27 September 2013)
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A major new version of ISPC with several new targets and important bug fixes.
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Here's a list of the most important changes, if you are using pre-built
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binaries (which are based on patched version of LLVM 3.3):
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* The naming of targets was changed to explicitly include data type width and
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a number of threads in the gang. For example, avx2-i32x8 is avx2 target,
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which uses 32 bit types as a base and has 8 threads in a gang. Old naming
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scheme is still supported, but depricated.
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* New SSE4 targets for calculations based on 8 bit and 16 bit data types:
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sse4-i8x16 and sse4-i16x8.
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* New AVX1 target for calculations based on 64 bit data types: avx1-i64x4.
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* SVML support was extended and improved.
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* Behavior of -g switch was changed to not affect optimization level.
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* ISPC debug infrastructure was redesigned. See --help-dev for more info and
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enjoy capabilities of new --debug-phase=<value> and --off-phase=<value>
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switches.
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* Fixed an auto-dispatch bug, which caused AVX code execution when OS doesn't
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support AVX (but hardware does).
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* Fixed a bug, which discarded uniform/varying keyword in typedefs.
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* Several performance regressions were fixed.
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If you are building ISPC yourself, then following changes are also available
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to you:
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* --cpu=slm for targeting Intel Atom codename Silvermont (if LLVM 3.4 is used).
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* ARM NEON targets are available (if enabled in build system).
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* --debug-ir=<value> is available to generate debug information based on LLVM
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IR (if LLVM 3.4 is used). In debugger you'll see LLVM IR instead of source
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code.
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* A redesigned and improved test and configuration management system is
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available to facilitate the process of building LLVM and testing ISPC
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compiler.
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Standard library changes/fixes:
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* __pause() function was removed from standard library.
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* Fixed reduce_[min|max]_[float|double] intrinsics, which were producing
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incorrect code under some conditions.
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Language changes:
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* By default a floating point constant without a suffix is a single precision
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constant (32 bit). A new suffix "d" was introduced to allow double precision
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constant (64 bit). Please refer to tests/double-consts.ispc for syntax
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examples.
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=== v1.4.4 === (19 July 2013)
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A minor version update with several stability fixes requested by the customers.
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Dmitry Babokin