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One-to-One C-to-Hardware Mapping
Table 3–4 shows an example of a switch statement converted to
equivalent if-else statements.
Table 3–4. switch Statement Converted to if-else Statements
switch Implementation
switch (byte_select)
{
case 1:
out = in & 0x0000ff00;
break;
case 2:
out = in & 0x00ff0000;
break;
case 3:
out = in & 0xff000000;
if-else Implementation
if (byte_select == 1)
out = in & 0x0000ff00;
else
if (byte_select == 2)
out = in & 0x00ff0000;
else
if (byte_select == 3)
out = in & 0xff000000;
else
out = in & 0x000000ff;
break;
default:
out = in & 0x000000ff;
}
Figure 3–7 shows the logic that results of translating the if-else code
from Table 3–4 .
3–10
Nios II C2H Compiler User Guide
9.1
Altera Corporation
November 2009
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