All supported environment calls for your version of Ripes is described in the Help-> System calls menu, within the application.
Ripes supports the following environment calls:
a7 |
a0 |
Name | Description |
|---|---|---|---|
| 1 | (integer to print) | print_int | Prints the value located in a0 as a signed integer |
| 2 | (float to print) | print_float | Prints the value located in a0 as a floating point number |
| 4 | (pointer to string) | print_string | Prints the null-terminated string located at address in a0 |
| 10 | - | exit | Halts the simulator |
| 11 | (char to print) | print_char | Prints the value located in a0 as an ASCII character |
| 34 | (integer to print) | print_hex | Prints the value located in a0 as a hex number |
| 35 | (integer to print) | print_bin | Prints the value located in a0 as a binary number |
| 36 | (integer to print) | print_unsigned | Prints the value located in a0 as an unsigned integer |
| 93 | (status code) | exit | Halts the simulator and exits with status code in a0 |
.data
str: .string "abc"
.text
li a0 42
li a7 1
ecall # prints "42" to console
li a7 11
ecall # prints "*" to console (ASCII(42) = '*')
la a0 str
li a7 4
ecall # Prints "abc" to console
To stop the Ripes simulator, either use the ecall convention as below, or branch to a label that is located at the end of the .text segment in the source code.
.text
main:
li a7 10
ecall
# The following instructions will not get executed
li a1 1
li a2 1
li a3 1