104 lines
4.4 KiB
Plaintext
104 lines
4.4 KiB
Plaintext
=== v1.0.5 === (1 August 2011)
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Multi-element vector swizzles are supported; for example, given a 3-wide
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vector "foo", then expressions like "foo.zyx" and "foo.yz" can be used to
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construct other short vectors. See
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http://ispc.github.com/ispc.html#short-vector-types
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for more details. (Thanks to Pete Couperus for implementing this code!).
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int8 and int16 datatypes are now supported. It is still generally more
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efficient to use int32 for intermediate computations, even if the in-memory
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format is int8 or int16.
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There are now standard library routines to convert to and from 'half'-format
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floating-point values (half_to_float() and float_to_half()).
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There is a new example with an implementation of Perlin's Noise function
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(examples/noise). It shows a speedup of approximately 4.2x versus a C
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implementation on OSX and a 2.9x speedup versus C on Windows.
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=== v1.0.4 === (18 July 2011)
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enums are now supported in ispc; see the section on enumeration types in
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the documentation (http://ispc.github.com/ispc.html#enumeration-types) for
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more informaiton.
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bools are converted to integers with zero extension, not sign extension as
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before (i.e. a 'true' bool converts to the value one, not 'all bits on'.)
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For cases where sign extension is still desired, there is a
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sign_extend(bool) function in the standard library.
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Support for 64-bit types in the standard library is much more complete than
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before.
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64-bit integer constants are now supported by the parser.
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Storage for parameters to tasks is now allocated dynamically on Windows,
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rather than on the stack; with this fix, all tests now run correctly on
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Windows.
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There is now support for atomic swap and compare/exchange with float and
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double types.
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A number of additional small bugs have been fixed and a number of cases
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where the compiler would crash given a malformed program have been fixed.
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=== v1.0.3 === (4 July 2011)
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ispc now has a bulit-in pre-processor (from LLVM's clang compiler).
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(Thanks to Pete Couperus for this patch!) It is therefore no longer
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necessary to use cl.exe for preprocessing on Windows; the MSVC proejct
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files for the examples have been updated accordingly.
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There is another variant of the shuffle() function int the standard
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library: "<type> shuffle(<type> v0, <type> v1, int permute)", where the
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permutation vector indexes over the concatenation of the two vectors
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(e.g. the value 0 corresponds to the first element of v0, the value
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2*programCount-1 corresponds to the last element of v1, etc.)
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ispc now supports the usual range of atomic operations (add, subtract, min,
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max, and, or, and xor) as well as atomic swap and atomic compare and
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exchange. There is also a facility for inserting memory fences. See the
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"Atomic Operations and Memory Fences" section of the user's guide
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(http://ispc.github.com/ispc.html#atomic-operations-and-memory-fences) for
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more information.
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There are now both 'signed' and 'unsigned' variants of the standard library
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functions like packed_load_active() that take references to arrays of
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signed int32s and unsigned int32s respectively. (The
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{load_from,store_to}_{int8,int16}() functions have similarly been augmented
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to have both 'signed' and 'unsigned' variants.)
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In initializer expressions with variable declarations, it is no longer
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legal to initialize arrays and structs with single scalar values that then
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initialize their members; they now must be initialized with initializer
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lists in braces (or initialized after of the initializer with a loop over
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array elements, etc.)
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=== v1.0.2 === (1 July 2011)
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Floating-point hexidecimal constants are now parsed correctly on Windows
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(fixes issue #16).
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SSE2 is now the default target if --cpu=atom is given in the command line
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arguments and another target isn't explicitly specified.
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The standard library now provides broadcast(), rotate(), and shuffle()
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routines for efficient communication between program instances.
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The MSVC solution files to build the examples on Windows now use
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/fpmath:fast when building.
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=== v1.0.1 === (24 June 2011)
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ispc no longer requires that pointers to memory that are passed in to ispc
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have alignment equal to the targets vector width; now alignment just has to
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be the regular element alignment (e.g. 4 bytes for floats, etc.) This
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change also fixed a number of cases where it previously incorrectly
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generated aligned load/store instructions in cases where the address wasn't
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actually aligned (even if the base address passed into ispc code was).
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=== v1.0 === (21 June 2011)
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Initial Release
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