Class: CSE 120 Subject: computer-science computer-architecture Date: 2025-05-05 Teacher: **Prof. Nath
RISC-V Cont
Functions in RISC-V
jal: jump and link. used to jump to a function address from the current PC(program counter)
ret: direct PC to address stored in register x1
Example
assume label foo is stored at address 8000 and bar is stored at address 8080
C code
void bar()
{
return;
}
void foo()
{
bar();
// rest of foo code
}RISC-V Implementation
// address instructions
8000(foo): jal bar; // x1 = 8004(PC + 4)
8004: // PC jumps back here afrer executing function bar
...
9080(bar): ret; // PC jumps to value in x1 = 8004