URL
https://opencores.org/ocsvn/ssbcc/ssbcc/trunk
[/] [ssbcc/] [trunk/] [macros/] [9x8/] [push16.py] - Blame information for rev 4
Details |
Compare with Previous |
View Log
Line No. |
Rev |
Author |
Line |
1 |
3 |
sinclairrf |
# Copyright 2014, Sinclair R.F., Inc.
|
2 |
|
|
|
3 |
|
|
def push16(ad):
|
4 |
|
|
"""
|
5 |
|
|
User-defined macro to push a 16 bit value onto the data stack so that the LSB
|
6 |
|
|
is deepest in the data stack and the MSB is at the top of the data stack.\n
|
7 |
|
|
Usage:
|
8 |
|
|
.push16(v)
|
9 |
|
|
where
|
10 |
|
|
v is a 16-bit value, a constant, or an evaluated expression\n
|
11 |
|
|
The effect is to push v%0x100 and int(v/2**8)%0x100 onto the data stack.\n
|
12 |
4 |
sinclairrf |
( - u_LSB u_MSB )
|
13 |
3 |
sinclairrf |
"""
|
14 |
|
|
|
15 |
|
|
# Add the macro to the list of recognized macros.
|
16 |
|
|
ad.AddMacro('.push16', 2, [ ['','singlevalue','symbol'] ]);
|
17 |
|
|
|
18 |
|
|
# Define the macro functionality.
|
19 |
|
|
def emitFunction(ad,fp,argument):
|
20 |
|
|
argument = argument[0];
|
21 |
4 |
sinclairrf |
v = ad.Emit_IntegerValue(argument);
|
22 |
|
|
if not (-2**15 <= v < 2**16):
|
23 |
|
|
raise asmDef.AsmException('Argument "%s" should be a 16-bit integer at %s' % (argument['value'],argument['loc'],));
|
24 |
|
|
printString = argument['value'] if type(argument['value']) == str else '0x%04X' % (v % 2**16);
|
25 |
|
|
ad.EmitPush(fp,v%0x100,'');
|
26 |
|
|
v >>= 8;
|
27 |
|
|
ad.EmitPush(fp,v%0x100,'.push16(%s)' % printString);
|
28 |
|
|
|
29 |
3 |
sinclairrf |
ad.EmitFunction['.push16'] = emitFunction;
|
© copyright 1999-2024
OpenCores.org, equivalent to Oliscience, all rights reserved. OpenCores®, registered trademark.