search for: mantissas

My understanding is that this checks whether the bit width of the integer *type* fits in the bit width of the mantissa, not the bit width of the integer value. - CL > On Apr 14, 2016, at 6:02 PM, escha at apple.com wrote: > > We already do this to some extent; see this code in InstCombineCasts: > > // fpto{s/u}i({u/s}itofp(X)) --> X or zext(X) or sext(X) or trunc(X) > //

I'm saying at the IR level, not the C level. IR makes certain assumptions about the representation of floating point numbers. Nothing to do with C, I only used it as an example. - CL > On Apr 14, 2016, at 4:49 PM, Martin J. O'Riordan <martin.oriordan at movidius.com> wrote: > > I don't think that this is correct. > > | Let's say we have an int x, and we

I noticed some odd behavior with APFloat's convertFromString method. 1. If I pass the hex representation of the closest value to 0.1 (0x19999Ap-24), everything is fine and opOk is returned. However, if I pass the same value as a decimal string (0.10000002384185791015625), opInexact is set. 2. On the lower end of the scale, the smallest denormal 0x1p-149 returns opOk, but the

Hi all: I need an instruction that can convert decimal values into floating point numbers. i.e. say I have a decimal number 1110794174 (== 42355FBE in hex ) and (== 45.3435 as a float) essentially the mantissa and exponent representation needs to be used. Is there any way of doing this in llvm? Thanks and Regards -- -- Aparna Kotha Graduate Student Electrical and Computer Engineering

> Two of those are compile errors, suggesting you aren't pulling in the > right header file (it's in common/serialise-double.h I believe). Thanks, fixed those errors. > I can't tell for sure without seeing the diff. You may mean just > `ptr++`? But it could be something else, depending on what you're > trying to do. I'm trying to unserialise normalization

Hi all, I need to convert a floating point value from Microsoft Basic format to IEEE format. There's a simple way to achieve this in R or I have to write my own function? (e.g. convert the C code below) thanks t #include <string.h> /* for strncpy */ int _fmsbintoieee(float *src4, float *dest4) { unsigned char *msbin = (unsigned char *)src4; unsigned char *ieee

Stephane Lesage a ?crit : > > Hi Jean-Marc, > > As I told you, bank is a reserved keyword in Analog Devices compiler for > Blackfin architecture. > So we need to change the variables named bank to something else. You mean the VDSP compiler that people seem to have mostly replaced with gcc? > Here's a patch that changes bank to bnk in the 3 concerned files. > (Hope

I have tried to compile this from source. I don't know what Endianess is, but it is probably not debian power pc. Am I would of luck with this package? Stephen Sefick * Installing *source* package ?ifultools? ... ** libs gcc -std=gnu99 -I/usr/local/lib/R/include -I"../inst/include/" -D"MUTIL_STATIC" -D"DEF_TF" -D"INTERRUPT_ENABLE"

Hi all, I'd like to make use of some specific x86 Streaming SIMD Extension instructions, but I don't know where to start. For instance the 'rcpps' instructions computes a low precision but fast reciprocal. I've noticed that LLVM supports intrinsics, but I couldn't find any information on how to use them. I've tried digging through the LLVM-GCC code but it's just

a) Numeric values may be either integers (signed 32 bit) or double precision (53 bit mantissa). b) Double precision constants are numeric with no decoration (e.g. 61224). Integer constants have an L (e.g. 61224L). c) 61224*61224 > 2^31-1 so that answer cannot fit into an integer. d) Exponentiation is a floating point operation so the result of 61224L^2L is a floating point answer that CAN

Before responding to Jeff's posting, let me reiterate my question: Why does a function using m1*m1 produce an integer overflow, but m1^2 does not? As for Jeff's 'response': > a) Numeric values may be either integers (signed 32 bit) or double precision (53 bit mantissa). > b) Double precision constants are numeric with no decoration (e.g. 61224). Integer constants have an L

I'm trying to run e2fsck on a ~6TB filesystem which is about 90% full. We're doing backup to disk to this filesystem, and have a number of hard links (link counts up to 90). strace shows: write(1, "Pass 2: Checking ", 17) = 17 write(1, "directory", 9) = 9 write(1, " structure\n", 11) = 11 mmap(NULL, 91574272,

I have problem with integer overflow that I cannot understand. I have a character vector curr.lemmas with the following properties: length(curr.lemmas) # 61224 length(unique(curr.lemmas)) # 2652 That vector is the input to the following function: yules.k1 <- function(input) { m1 <- length(input); temp <- table(table(input)) m2 <- sum("*"(temp,

I have undertaken a small project of writing a Vorbis decoder completely from the spec, with the goal of catching any errors, both typographically and algorithmically, in the spec. My "reference" decoder is also being written in an extremely methodical style, with practically no algorithmic optimization, such that it will be clear that every step has been copied exactly from the spec.

> `ptr` is, if I inferred correctly, a `const char *`. (I'm not sure, > because I don't know why you're incrementing it. Please push your code > to github if you need further help so people can see the entire > context of your changes.) I've pushed all the changes I made so far https://github.com/xapian/xapian/compare/master...ivmarkp:piv+?diff=split&name=piv%2B

We have a problem inverting a matrix which has the following eigenvalues: > eigen(tcross, only.values=TRUE) $values [1] 7.917775e+20 2.130980e+16 7.961620e+13 8.241041e+12 2.258325e+12 [6] 3.869428e+11 6.791041e+10 2.485352e+09 9.863098e+08 9.819373e+05 [11] 3.263408e+05 2.929853e+05 2.920419e+05 2.714355e+05 8.733435e+04 [16] 8.127136e+04 6.543883e+04 5.335074e+04

Full_Name: Morten Welinder Version: snapshot OS: Submission from: (NULL) (65.213.85.129) Two things are wrong. 1. There is nan test outside IEEE_754. 2. The meat part of the function should really be something like... if (!lower_tail) x = -x; if (fabs (x) > 1) { double temp = atan (1 / x) / M_PI; return (x > 0) ? R_D_Clog (temp) : R_D_val (-temp); } else

aparna kotha wrote: > Hi all: > > I need an instruction that can convert decimal values into floating > point numbers. > > i.e. say I have a decimal number 1110794174 (== 42355FBE in hex ) and > (== 45.3435 as a float) > > essentially the mantissa and exponent representation needs to be used. > > > Is there any way of doing this in llvm? I think

On Jun 3, 2010, at 7:05 AMPDT, Stéphane Letz wrote: > Le 3 juin 2010 à 16:00, Martin Guy a écrit : > >> [off list] >> >>> 0.8f get converted in 0x3FE99999A0000000 by LLVM >> >> single precision >> >>> http://babbage.cs.qc.edu/IEEE-754/Decimal.html gives: >>> >>> 0x3FE999999999999A instead and this value cannot be read back

On Tue, May 20, 2008 at 5:03 AM, Nicolas Capens <nicolas at capens.net> wrote: > LoadInst *x = new LoadInst(ptr_x, "", false, basicBlock); > > // y = rcpps(x) // FIXME > StoreInst *storeResult = new StoreInst(y, ptr_y, false, basicBlock); Using an IRBuilder, something like the following (uncompiled, but it's at least approximately right): Value* x =