Nate Begeman f63be7d395 First round of support for doing scalar FP using the SSE2 ISA extension and ... XMM registers. There are many known deficiencies and fixmes, which will be addressed ASAP. The major benefit of this work is that it will allow the LLVM register allocator to allocate FP registers across basic blocks. The x86 backend will still default to x87 style FP. To enable this work, you must pass -enable-sse-scalar-fp and either -sse2 or -sse3 to llc. An example before and after would be for: double foo(double *P) { double Sum = 0; int i; for (i = 0; i < 1000; ++i) Sum += P[i]; return Sum; } The inner loop looks like the following: x87: .LBB_foo_1: # no_exit fldl (%esp) faddl (%eax,%ecx,8) fstpl (%esp) incl %ecx cmpl $1000, %ecx #FP_REG_KILL jne .LBB_foo_1 # no_exit SSE2: addsd (%eax,%ecx,8), %xmm0 incl %ecx cmpl $1000, %ecx #FP_REG_KILL jne .LBB_foo_1 # no_exit git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22340 91177308-0d34-0410-b5e6-96231b3b80d8		2005-07-06 18:59:04 +00:00
..
.cvsignore	ignore generated files	2004-11-21 00:01:54 +00:00
Makefile	Adjust to changes in asmwriter filenames	2004-12-16 17:33:24 +00:00
X86.h	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86.td	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86AsmPrinter.cpp	The statistic needs to be in the correct namespace.	2005-07-01 23:56:38 +00:00
X86AsmPrinter.h	Refactor X86AsmPrinter.cpp into multiple files. Patch contributed	2005-07-01 22:44:09 +00:00
X86ATTAsmPrinter.cpp	Refactor X86AsmPrinter.cpp into multiple files. Patch contributed	2005-07-01 22:44:09 +00:00
X86ATTAsmPrinter.h	Refactor X86AsmPrinter.cpp into multiple files. Patch contributed	2005-07-01 22:44:09 +00:00
X86CodeEmitter.cpp	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86ELFWriter.cpp	Add support to the X86 backend for emitting ELF files. To use this, we	2005-06-27 06:30:12 +00:00
X86FloatingPoint.cpp	* Remove trailing whitespace	2005-04-21 23:38:14 +00:00
X86InstrBuilder.h	* Remove trailing whitespace	2005-04-21 23:38:14 +00:00
X86InstrInfo.cpp	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86InstrInfo.h	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86InstrInfo.td	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86IntelAsmPrinter.cpp	Percolate the call up to the right superclass	2005-07-03 17:34:39 +00:00
X86IntelAsmPrinter.h	Refactor X86AsmPrinter.cpp into multiple files. Patch contributed	2005-07-01 22:44:09 +00:00
X86ISelPattern.cpp	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86ISelSimple.cpp	core changes for varargs	2005-06-18 18:34:52 +00:00
X86JITInfo.cpp	Fix lli linking on Mac OS X 10.4.1 for Intel.	2005-06-08 01:02:38 +00:00
X86JITInfo.h	* Remove trailing whitespace	2005-04-21 23:38:14 +00:00
X86PeepholeOpt.cpp	* Remove trailing whitespace	2005-04-21 23:38:14 +00:00
X86RegisterInfo.cpp	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86RegisterInfo.h	* Remove trailing whitespace	2005-04-21 23:38:14 +00:00
X86RegisterInfo.td	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86Relocations.h	* Remove trailing whitespace	2005-04-21 23:38:14 +00:00
X86TargetMachine.cpp	First round of support for doing scalar FP using the SSE2 ISA extension and	2005-07-06 18:59:04 +00:00
X86TargetMachine.h	Refactor the addPassesToEmitAssembly interface into a addPassesToEmitFile	2005-06-25 02:48:37 +00:00