Print a number in decimal

Problem

Convert a binary value to its decimal ASCII representation and print it.

Code

stl.startup
bit.print_dec_uint 32, n
stl.output '\n'
stl.loop

n: bit.vec 32, 12345

Walkthrough

• n: bit.vec 32, 12345 — allocate a 32-bit variable initialised to 12345. The initial value is encoded at assembly time as bit-flips into the variable’s region.

• bit.print_dec_uint 32, n — divides n by 10 repeatedly, printing each remainder as the corresponding '0'–'9' ASCII byte. The macro runs in n²·(2@+4) time; the comment in the source notes the 28/93 ratio used to size the print buffer.

Variations

Signed integers (handles negative numbers + leading -):

stl.startup
bit.print_dec_int 32, signed_val
stl.output '\n'
stl.loop

signed_val: bit.vec 32, 0 - 12345     // -12345

Hex instead of decimal — much cheaper, no division loop:

stl.startup
bit.print_hex_int 32, n, 1   // last arg = "uppercase digits"
stl.output '\n'
stl.loop

n: bit.vec 32, 0xCAFE

See also

• bit.print_dec_uint

• bit.print_dec_int

• bit.print_hex_int

• The Complexity glossary — to understand n²·(2@+4).