Hi all, newbie here.
Does anyone know if it is possible to use GCC or Clang to multiply
two unsigned numbers and have it use for intel instructions, the mull instruction or an imul. I can't figure how to word this to accomplish this task:
Code:
(int)(((unsigned long long)result * (unsigned)2290649225) >> 37);
result is max of 2^17 bits, and trying to retrieve high word >> 5 after a
mull or imul instruction. The above wording creates two multiply instructions.
This wording creates one instruction:
Code:
(int)(((unsigned long long)result * (unsigned)1145324613) >> 36);
Not sure intel can handle first and that's why gcc breaks into two multiplies???
I believe the second will accomplish my task, but now need to recheck all my code.
Thanx, and I'll probably get kicked (was smoking and typing)
Pheonix
I'am doing a tutorial where a simple calculator was given, then i noticed that you can't actually multiply
this is how i have approached the problem so far. i just need if the user enters "*"
to change it to "/*" ,is it possible? i know that * means the name of the last file in the directory... (8 Replies)
Hello there,
how do i multiply a fraction and a whole number? Example 20% of 50,000.
I had gotten 0.2 using the following:
chk=echo 20 100 | awk `{print $1/$2}`
echo $chk
$chk \* 50000 displays the error: non-numeric expression. (1 Reply)
AIM- Install Oracle 11g on Solaris using VMWare
Steps
1.Logged on as root
2.Created subfolders à /usr/local/bin & /usr/local/bin/gcc
3.Downloaded gcc & libiconv & unzipped them on my harddrive & burnt them on CD
4.Copied files from CD to /usr/local/bin/gcc
5.Terminal (root) à pkgadd -d... (8 Replies)
Suppose i have a file A
1*2*3*4
2*4*4*22
and second file B
2*3*4*5
4*4*6*7
By multiplying file A by file B that is file A by first column in file B respectively
output shud be
2*6*12*20
8*16*24*154
my code is
=$1
next
}
{for (f=1;f<=NF;f++) (2 Replies)
Hi,
I am writing a script in Bourne shell
#!/bin/sh
used=`quota -v | tail -1 | awk '{print $2}'`
total=`quota -v | tail -1 | awk '{print $3}'`
echo "$used"
echo "$total"
perc=`expr ${used} / ${total} * 100 | bc`
echo "$perc"
I want to get a percentage of quota used to total limit
I... (5 Replies)
Hi,
I would like to carry out a multiplication in a for loop but some how I get always zero. The result of the multiplication must be assigned to the variable x.
Here is teh code
for (( i=1;i<=15;i++)); do
x=$( printf "%s\n " 'scale = 10; i*5.0*335.0*3.0/1000.0' | bc)
echo $x $i... (5 Replies)
Hi,
i have file1 which looks like:
x1 y1 z1
x2 y2 z2
...(and so on)
and file2 which looks like:
a11 a12 a13
a21 a22 a23
a31 a32 a33
and i want to replace file1 with the following values:
x1' y1' z1'
x2' y2' z2'
...(and so on) (2 Replies)
Hi,
I can't find out how to create correct code to get multiplication of each elements of array. Let's say I enter array into command line (2 3 4 5 6 8) and i need output 2*3*4*5*6*8=5760.
I tried this one, but answer is 0.
for i in $@; do
mult=$((mult*i))done
echo "mult: " $mult
... (4 Replies)
I have two files. Row id in File1 matches the column id in file2 (starting from column7 )except the last 2 characters. File1 has 50 rows and File 2 has 56 columns. If the id matches I want to multiply the value in column3 of File1 to the entire column in File2. and in the final output print only... (11 Replies)
Discussion started by: Akang
11 Replies
LEARN ABOUT ULTRIX
emulate_branch
emulate_branch(3) Library Functions Manual emulate_branch(3)Name
emulate_branch, execute_branch - branch emulation
Syntax
#include <signal.h>
emulate_branch(scp, branch_instruction)
struct sigcontext *scp;
unsigned long branch_instruction;
execute_branch(branch_instruction)
unsigned long branch_instruction;
Description
The function is passed a signal context structure and a branch instruction. It emulates the branch based on the register values in the
signal context structure. It modifies the value of the program counter in the signal context structure (sc_pc) to the target of the
branch_instruction. The program counter must initially be pointing at the branch and the register values must be those at the time of the
branch. If the branch is not taken the program counter is advanced to point to the instruction after the delay slot (sc_pc += 8).
If the branch instruction is a `branch on coprocessor 2' or `branch on coprocessor 3' instruction, calls to execute the branch in data
space to determine if it is taken or not.
Return Values
The function returns a 0 if the branch was emulated successfully. A non-zero value indicates the value passed as a branch instruction was
not a branch instruction.
The function returns non-zero on taken branches and zero on non-taken branches.
Restrictions
Since is only intended to be used by it does not check its parameter to see if in fact it is a branch instruction. It is really a stop gap
in case a coprocessor is added without the kernel fully supporting it (which is unlikely).
See Alsocacheflush(2), sigvec(2), signal(3)
RISC emulate_branch(3)