Difference between revisions of "Pranav"

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=FPU=  
 
=FPU=  
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===Data formats===
 
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Page 18-23 SPARCV8.pdf
 
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[http://www.sparc.org/standards/V8.pdf]
 
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===PSR===
 
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[[File:PSR.jpg]]
 
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[[File:icc.jpg]]
 
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==ICC implementation details from pg 170(SPARC V8.pdf) ==
 
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N,Z,V,C ... may be mapped directly to PSR -> check in a few days
 
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Example for an ADD instruction :-
 
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Add Instructions operand2 := if (i = 0) then r[rs2] else sign_extend(simm13);
 
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                if (ADD or ADDcc) then
 
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                        result ← r[rs1] + operand2;
 
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                else if (ADDX or ADDXcc) then                            //check what these do
 
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                        result ← r[rs1] + operand2 + C;
 
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                next;
 
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                if (rd ≠ 0) then                                       
 
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                        r[rd] ← result;
 
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                if (ADDcc or ADDXcc) then (
 
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                        N ← result<31>;
 
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                        Z ← if (result = 0) then 1 else 0;
 
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                        V ← (r[rs1]<31> and operand2<31> and (not result<31>)) or
 
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                            ((not r[rs1]<31>) and (not operand2<31>) and result<31>);
 
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                        C ← (r[rs1]<31> and operand2<31>) or
 
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                            ((not result<31>) and (r[rs1]<31> or operand2<31>))
 
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                );
 
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===sf_float64_2op_check;sf_float64_2op_set===
 
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Helper function : sf_float64_2op_check
 
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called whenever softfloat_check() is called ... which is after the posedge of clk
 
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and similar for sf_float64_2op_set except that it is called before the posedge of clk
 
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and int ops have similar helper functions
 
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===simple_result===
 
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  simple_result[state].when      = my_gettime();
 
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  simple_result[state].val        = ll_res;
 
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  simple_result[state].op        = do_op;
 
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  simple_result[state].in_use    = 1;
 
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saves the pre comp values in a data structure struct Result_Entry... then checked using the fpu generated result....
 
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struct result_entry saves values for checking including number of tests being run
 
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32 bit operations are meant to printed out with  masking being involved at some point
 
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we assign op=OP_MDDS something to tell the hardware the current opcode  
 
we assign op=OP_MDDS something to tell the hardware the current opcode  
 
and float64_add_next etc are used to compute the softvalues .. no calculations by hand
 
and float64_add_next etc are used to compute the softvalues .. no calculations by hand
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===PLI===
 
===PLI===
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similarly for my_getlongp() and my_gettime()
 
similarly for my_getlongp() and my_gettime()
  
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 +
==DC SHELL==
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 +
invoke dc_shell-t -64bit
 +
 +
GUI
 +
 +
gui_start
  
 
== GIT Commands - HOWTO ==
 
== GIT Commands - HOWTO ==
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=== VI skills/UNIX ===
 
=== VI skills/UNIX ===
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 +
search replace
 +
 +
http://www.thegeekstuff.com/2009/04/vi-vim-editor-search-and-replace-examples/
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 +
:%s/awesome/wonderful/gc
 +
  
 
Clear cmd by using ctrl+L instead of typing out clear
 
Clear cmd by using ctrl+L instead of typing out clear
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<number>dd - delete line
 
<number>dd - delete line
 
<number>yy - yank  line
 
<number>yy - yank  line
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 +
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==SSH multiple windows==
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 +
ssh -X mada gnome-terminal &
  
  
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set backspace=2
 
set backspace=2
  
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====:fixdel====
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===Alignment===
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select block of text in visual mode
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then gq to align
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===search tips===
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gd to search for word under cursor
 +
 
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===copy & paste===
 +
 
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to copy within blocks
 +
yi{}, yi(), yiw, etc - copy
 +
di{}, di(), diw, etc - cut
 +
 
 +
ctrl+v for block mode vi
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===Working with multiple files===
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 +
:e filename - Edit a file in a new buffer
 +
:bnext (or :bn) - go to next buffer
 +
:bprev (of :bp) - go to previous buffer
 +
:bd - delete a buffer (close a file)
 +
:sp filename - Open a file in a new buffer and split window
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ctrl+ws - Split windows
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ctrl+ww - switch between windows
 +
ctrl+wq - Quit a window
 +
ctrl+wv - Split windows vertically
 +
 
 +
:fixdel
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 +
 
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===Logging terminal outputs===
 +
 
 +
Nifty tool for logging the entire interactive session
 +
 
 +
 
 +
'''script <outfile.out>'''
 +
 
 +
ctrl+D to exit or end session

Latest revision as of 03:32, 12 September 2011

FPU

we assign op=OP_MDDS something to tell the hardware the current opcode and float64_add_next etc are used to compute the softvalues .. no calculations by hand

PLI

tf_putlongp() is a PLI function which puts a 64 int value to the current task or function

my_putlongp() is a helper function which takes in dest and value and stores it into that dest with some PLI function...

similarly for my_getlongp() and my_gettime()


DC SHELL

invoke dc_shell-t -64bit

GUI

gui_start

GIT Commands - HOWTO

git commit //adds the current changes to the local repo

git push //makes the changes to the server repo

git status // to check local rev compares to the main one

git pull //to sync with others

git mv foo foo.cpp

git add foo.cpp

git reset --hard HEAD // reset local repo

git diff HEAD // diff from last commit

TO COMMIT - TYPICAL WAY

git commit -a -m 'DEBUG: Defaulted to the rank test...'


NOTES on terminal commands and search tips

NOTES on terminal commands and search tips

grep -r <string> * --- To search for a string in folders

find ~ -name "*.*" --- to search for a file


to open a pdf

evince <filename>.pdf


VI skills/UNIX

search replace

http://www.thegeekstuff.com/2009/04/vi-vim-editor-search-and-replace-examples/

%s/awesome/wonderful/gc


Clear cmd by using ctrl+L instead of typing out clear

To store simulation log in a file say log.txt

rake test:softfloat_tb >& log.txt


Cut or copy lines without counting the lines 

  - In normal mode, go to the beginning of the first mark ---> Type mk
  - Go to the end of your selection                       ---> "ay'k (double quotes, <register name from a-z>, <y-yank or d-delete>, single quote, k

If you do "ad'k it will delete them from the current location and copy them into register a.

<number>dd - delete line <number>yy - yank line


SSH multiple windows

ssh -X mada gnome-terminal &


My ~/.vimrc file

set ai

syntax on

set ic

set hls

set ruler

set history=50

set backspace=2

Alignment

select block of text in visual mode

then gq to align

search tips

gd to search for word under cursor

copy & paste

to copy within blocks yi{}, yi(), yiw, etc - copy di{}, di(), diw, etc - cut

ctrl+v for block mode vi


Working with multiple files

e filename - Edit a file in a new buffer
bnext (or :bn) - go to next buffer
bprev (of :bp) - go to previous buffer
bd - delete a buffer (close a file)
sp filename - Open a file in a new buffer and split window

ctrl+ws - Split windows ctrl+ww - switch between windows ctrl+wq - Quit a window ctrl+wv - Split windows vertically

fixdel


Logging terminal outputs

Nifty tool for logging the entire interactive session


script <outfile.out>

ctrl+D to exit or end session

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