search for: ftst

...s also > generated! As far as I can tell it should return right after this: > > BuildMI(BB, X86::SAHF, 1); > > instead it falls through and goes on to generate the normal compare > instruction... Am I right? Nope. It's emitting a compare against zero with fucomi instead of ftst. fucomi is a PPRO+ instruction that deposits the result of the comparison into the integer condition codes. This saves having to use SAHF and some bit-twiddling, so it's usually a bit faster than using ftst. The simple isel used to produce ftst for compare against zero. If you do some be...

Hello, I didn't get any reply to my previous mail about adding floating point intrinsics to the X86 pattern instruction selector... And I could really need some help. Anyway, I think my confusion was caused partly by an already existing bug in the instruction selection for floating point compares. The case which emits code for the special case of comparing against constant 0.0 does not

...tell it should return right >> after this: >> >> BuildMI(BB, X86::SAHF, 1); >> >> instead it falls through and goes on to generate the normal compare >> instruction... Am I right? > > Nope. It's emitting a compare against zero with fucomi instead of ftst. > fucomi is a PPRO+ instruction that deposits the result of the comparison > into the integer condition codes. This saves having to use SAHF and some > bit-twiddling, so it's usually a bit faster than using ftst. The simple > isel used to produce ftst for compare against zero....

...431 mov dword ptr ds:[161D624Ch],0 1716043B mov eax,76E4560h 17160440 mov dword ptr [esp],eax 17160443 call HueVMReadCommands_LLVMReadVoxel (19BB229h) 17160448 fsub dword ptr ds:[161D6280h] 1716044E fabs 17160450 fst qword ptr [esp+14h] 17160454 ftst 17160456 fstp st(0) 17160458 fnstsw ax 1716045A sahf 1716045B fldz 1716045D fchs 1716045F fld qword ptr [esp+14h] 17160463 fucomip st,st(1) 17160465 fstp st(0) 17160467 jbe 17160498 1716046D mov eax,76E4F60h 17160472 mov dword ptr [e...

...is the Waynesboro Gauge on the Savannah River Proper (SRS) #02102908 is the Flat Creek Gauge (ftbrfcms) #02133500 is the Drowning Creek (ftbrbmcm) #02341800 is the Upatoi Creek Near Columbus (ftbn) #02342500 is the Uchee Creek Near Fort Mitchell (ftbn) #02203000 is the Canoochee River Near Claxton (ftst) #02196690 is the Horse Creek Gauge at Clearwater, S.C. a <- "http://waterdata.usgs.gov/nwis/uv?format=rdb&period=" b <- "&site_no=021973269,02102908,02133500,02341800,02342500,02203000,02196690" z <- paste(a, days, b, sep="") L <- readLines(z) #l...

...iled: (isNew && "Got into the map somehow?"), function AddLegalizedOperand, file /usr/home/llvm/obj/../lib/CodeGen/SelectionDAG/LegalizeDAG.cpp, line 79. .text .align 16 .globl test1 .type test1, @function test1: fldl 4(%esp) ftst fstp %st(0) fnstsw sahf setne %al movzbl %al, %eax #FP_REG_KILL ret Abort trap (core dumped) FAIL: /usr/home/llvm/obj/../test/Regression/CodeGen/X86/fast-cc-pass-in-regs.ll: Does not have a RUN line Running /usr/home/llvm/obj/../test/Regres...

...is the Waynesboro Gauge on the Savannah River Proper (SRS) #02102908 is the Flat Creek Gauge (ftbrfcms) #02133500 is the Drowning Creek (ftbrbmcm) #02341800 is the Upatoi Creek Near Columbus (ftbn) #02342500 is the Uchee Creek Near Fort Mitchell (ftbn) #02203000 is the Canoochee River Near Claxton (ftst) a <- "http://waterdata.usgs.gov/nwis/uv?format=rdb&period=" b <- "&site_no=021973269,02102908,02133500,02341800,02342500,02203000" z <- paste(a, days, b, sep="") L <- readLines(z) #look for the data with USGS in front of it (this take advantage o...

Hello, I am trying to make the FP intrinsics (abs, sin, cos, sqrt) I've added work with the X86ISelPattern, but I'm having some difficulties understanding what needs to be done. I assume I have to add new nodetypes for the FP instructions to SelectionDAGNodes.h, and make nodes for these in SelectionDAGLowering::visitCall when I find the intrinsic... The part I don't quite