diff options
Diffstat (limited to 'tools/builtin.s')
| -rw-r--r-- | tools/builtin.s | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/tools/builtin.s b/tools/builtin.s index 7b14d95..ecea15b 100644 --- a/tools/builtin.s +++ b/tools/builtin.s @@ -18,10 +18,16 @@ printi: # t1 - Constant 10. # a1 - Local buffer. # t2 - Current character. + # t3 - Whether the number is negative. lw t0, 0(s0) addi t1, zero, 10 addi a1, s0, -2 + addi t3, zero, 0 + bge t0, zero, .digit10 + addi t3, zero, 1 + sub t0, zero, t0 + .digit10: rem t2, t0, t1 addi t2, t2, '0' @@ -30,8 +36,12 @@ printi: addi a1, a1, -1 bne zero, t0, .digit10 - ecall + beq zero, t3, .write_call + addi t2, zero, '-' + sb t2, 0(a1) + addi a1, a1, -1 +.write_call: addi a0, zero, 1 addi a1, a1, 1 sub a2, s0, a1 |