Hal Finkel ab849adec4 [PowerPC] Initial support for the VSX instruction set ... VSX is an ISA extension supported on the POWER7 and later cores that enhances floating-point vector and scalar capabilities. Among other things, this adds <2 x double> support and generally helps to reduce register pressure. The interesting part of this ISA feature is the register configuration: there are 64 new 128-bit vector registers, the 32 of which are super-registers of the existing 32 scalar floating-point registers, and the second 32 of which overlap with the 32 Altivec vector registers. This makes things like vector insertion and extraction tricky: this can be free but only if we force a restriction to the right register subclass when needed. A new "minipass" PPCVSXCopy takes care of this (although it could do a more-optimal job of it; see the comment about unnecessary copies below). Please note that, currently, VSX is not enabled by default when targeting anything because it is not yet ready for that. The assembler and disassembler are fully implemented and tested. However: - CodeGen support causes miscompiles; test-suite runtime failures: MultiSource/Benchmarks/FreeBench/distray/distray MultiSource/Benchmarks/McCat/08-main/main MultiSource/Benchmarks/Olden/voronoi/voronoi MultiSource/Benchmarks/mafft/pairlocalalign MultiSource/Benchmarks/tramp3d-v4/tramp3d-v4 SingleSource/Benchmarks/CoyoteBench/almabench SingleSource/Benchmarks/Misc/matmul_f64_4x4 - The lowering currently falls back to using Altivec instructions far more than it should. Worse, there are some things that are scalarized through the stack that shouldn't be. - A lot of unnecessary copies make it past the optimizers, and this needs to be fixed. - Many more regression tests are needed. Normally, I'd fix these things prior to committing, but there are some students and other contributors who would like to work this, and so it makes sense to move this development process upstream where it can be subject to the regular code-review procedures. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@203768 91177308-0d34-0410-b5e6-96231b3b80d8		2014-03-13 07:58:58 +00:00
..
AArch64	IR: add a second ordering operand to cmpxhg for failure	2014-03-11 10:48:52 +00:00
ARM	ARM: correct Dwarf output for non-contiguous VFP saves.	2014-03-12 11:29:23 +00:00
CPP
Generic	CommandLine: Exit successfully for -version and -help	2014-02-28 19:08:01 +00:00
Hexagon	Fix broken CHECK lines	2014-02-16 07:31:05 +00:00
Inputs
Mips	[mips] BSEL's and BINS[RL] operands are reversed compared to the vselect node used in the pattern.	2014-03-12 11:54:00 +00:00
MSP430
NVPTX	Followup to r203483 - add test.	2014-03-10 20:36:04 +00:00
PowerPC	[PowerPC] Initial support for the VSX instruction set	2014-03-13 07:58:58 +00:00
R600	R600: Fix trunc store from i64 to i1	2014-03-12 18:45:52 +00:00
SPARC	IR: add a second ordering operand to cmpxhg for failure	2014-03-11 10:48:52 +00:00
SystemZ	IR: add a second ordering operand to cmpxhg for failure	2014-03-11 10:48:52 +00:00
Thumb	Add triples to try to fix the windows bots.	2014-02-13 16:49:47 +00:00
Thumb2	ARMv8 IfConversion must skip narrow instructions that a) define CPSR and b) wouldn't affect CPSR in an IT block	2014-02-26 11:27:28 +00:00
X86	[X86] Add peephole for masked rotate amount	2014-03-12 21:20:55 +00:00
XCore	[XCore] Add support for the "m" inline asm constraint.	2014-03-06 16:37:48 +00:00