Appendix: runtime function sizes¶
Auto-generated
The statistics and tables on this page are regenerated from DCCRTL.MAC
every time the documentation is built, by the docs/docs/hooks/runtime_sizes.py
MkDocs hook. They never go out of step with the runtime source, so prefer
these numbers over any quoted elsewhere.
This page estimates the source volume associated with selected runtime features
and their transitive dependencies. For how dccrtlstrip decides what
to keep — and the optimisation takeaways for keeping a program small — see
Runtime optimization.
How to read the numbers¶
The numbers are relative source-line counts, not exact bytes (blocks contain
comments and blank lines). They help locate large source/dependency groups,
but cannot establish binary-size or performance rankings. Measure the linked
.COM and assembler listings for those decisions.
- self — source lines in the function's own block.
- marginal —
selfplus every additional reachable block that is not already in thestart-rooted baseline. Actual application references may already retain some of these blocks, reducing the incremental cost. - pulls in — the extra runtime blocks added beyond the baseline.
Symbols are internal runtime labels
The Symbol column lists the internal assembler label, not the C name
you call. For example __stchk is the stack-overflow guard linked by
-fstack-check, __mlh is the malloc heap helper, and __pf_run is the
shared printf engine. Searching this page for a feature word such as
"stack" or "printf" may not match the symbol — look for the corresponding
__ label instead (the pulls in column names related ones).
Runtime: DCCRTL.MAC
- Total runtime lines: 24771
- Preamble lines before the first
public: 12 - Parsed public blocks: 429
- Always-present baseline: ~364 lines in 7 blocks
Formatted I/O (stdio.h)¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_pffio |
488 | ~3245 | public_prelude, _printf, __pf_run/pf_loop/pf_percent/..., pf_arg_hl, pf_pad_a/pf_pad_loop, pf_zsetup/pf_zs_clrw/pf_zs_done, pf_efflen, pf_iprepad, pf_ipostpad, pf_zero_prec_blank, pf_zfd/pf_zfd_zloop/pf_zfd_print/..., pf_emit_a/pfe_bufn/pfe_buf/..., ... |
_fprintf |
64 | ~1778 | public_prelude, __pf_run/pf_loop/pf_percent/..., pf_arg_hl, pf_pad_a/pf_pad_loop, pf_zsetup/pf_zs_clrw/pf_zs_done, pf_efflen, pf_iprepad, pf_ipostpad, pf_zero_prec_blank, pf_zfd/pf_zfd_zloop/pf_zfd_print/..., pf_emit_a/pfe_bufn/pfe_buf/..., pf_emstr, ... |
_printf |
24 | ~788 | public_prelude, __pf_run/pf_loop/pf_percent/..., pf_arg_hl, pf_pad_a/pf_pad_loop, pf_zsetup/pf_zs_clrw/pf_zs_done, pf_efflen, pf_iprepad, pf_ipostpad, pf_zero_prec_blank, pf_zfd/pf_zfd_zloop/pf_zfd_print/..., pf_emit_a/pfe_bufn/pfe_buf/..., pf_emstr, ... |
_sprintf |
35 | ~799 | public_prelude, __pf_run/pf_loop/pf_percent/..., pf_arg_hl, pf_pad_a/pf_pad_loop, pf_zsetup/pf_zs_clrw/pf_zs_done, pf_efflen, pf_iprepad, pf_ipostpad, pf_zero_prec_blank, pf_zfd/pf_zfd_zloop/pf_zfd_print/..., pf_emit_a/pfe_bufn/pfe_buf/..., pf_emstr, ... |
_vprintf |
26 | ~790 | public_prelude, __pf_run/pf_loop/pf_percent/..., pf_arg_hl, pf_pad_a/pf_pad_loop, pf_zsetup/pf_zs_clrw/pf_zs_done, pf_efflen, pf_iprepad, pf_ipostpad, pf_zero_prec_blank, pf_zfd/pf_zfd_zloop/pf_zfd_print/..., pf_emit_a/pfe_bufn/pfe_buf/..., pf_emstr, ... |
_vsprintf |
35 | ~799 | public_prelude, __pf_run/pf_loop/pf_percent/..., pf_arg_hl, pf_pad_a/pf_pad_loop, pf_zsetup/pf_zs_clrw/pf_zs_done, pf_efflen, pf_iprepad, pf_ipostpad, pf_zero_prec_blank, pf_zfd/pf_zfd_zloop/pf_zfd_print/..., pf_emit_a/pfe_bufn/pfe_buf/..., pf_emstr, ... |
_vfprintf |
63 | ~1777 | public_prelude, __pf_run/pf_loop/pf_percent/..., pf_arg_hl, pf_pad_a/pf_pad_loop, pf_zsetup/pf_zs_clrw/pf_zs_done, pf_efflen, pf_iprepad, pf_ipostpad, pf_zero_prec_blank, pf_zfd/pf_zfd_zloop/pf_zfd_print/..., pf_emit_a/pfe_bufn/pfe_buf/..., pf_emstr, ... |
_puts |
26 | ~26 | nothing beyond own block |
__fpc |
60 | ~944 | _errno, public_prelude, _write/wrcountok/wrloop/..., __chkfd/__chkfdl/cfbad, __usep, __offp/__lenp/__apset/..., __fcbp, __setrr/setrr_big, __chunk/ch_more128/ch_have_count/..., __advio/__extln/extln_diff/..., __zerdm/__fcbfresh, __rwerr/rwe_mark/__seter, ... |
__fps |
56 | ~940 | _errno, public_prelude, _write/wrcountok/wrloop/..., __chkfd/__chkfdl/cfbad, __usep, __offp/__lenp/__apset/..., __fcbp, __setrr/setrr_big, __chunk/ch_more128/ch_have_count/..., __advio/__extln/extln_diff/..., __zerdm/__fcbfresh, __rwerr/rwe_mark/__seter, ... |
__pchr |
12 | ~12 | nothing beyond own block |
Console buffering control (stdio.h)¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_setvbuf |
59 | ~195 | public_prelude, __cob_setbuf/csb_ok, __cobdflt, _errno, public_prelude, __rwerr/rwe_mark/__seter, __einval, __nospc/__slot/__chnk/..., public_prelude, __fderr |
_setbuf |
39 | ~64 | public_prelude, __cob_setbuf/csb_ok, __cobdflt |
_fflush |
11 | ~11 | nothing beyond own block |
Console input (stdio.h)¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
__gchr |
35 | ~83 | __ugvalid, __ugchars, __ugget, __ceofst |
__gtch |
40 | ~85 | __kbht |
__kbht |
45 | ~45 | nothing beyond own block |
Formatted input (scanf family)¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_fscanf |
25 | ~1719 | __fgetc, __ugvalid, __ugchars, __ugget, __ugput, __getc, __gchr, __ceofst, _errno, public_prelude, _read/rdcon_count/rdcon_loop/..., __chkfd/__chkfdl/cfbad, ... |
_scanf |
21 | ~1715 | __fgetc, __ugvalid, __ugchars, __ugget, __ugput, __getc, __gchr, __ceofst, _errno, public_prelude, _read/rdcon_count/rdcon_loop/..., __chkfd/__chkfdl/cfbad, ... |
_sscanf |
25 | ~1719 | __fgetc, __ugvalid, __ugchars, __ugget, __ugput, __getc, __gchr, __ceofst, _errno, public_prelude, _read/rdcon_count/rdcon_loop/..., __chkfd/__chkfdl/cfbad, ... |
Low-level file I/O¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_fread |
107 | ~1411 | __ugvalid, __ugchars, __ugget, __gchr, __ceofst, __mulu, __udivmod, __dmcx, __divu, public_prelude, __q2u/D16U/D16U0/..., _errno, ... |
_fwrite |
85 | ~1315 | __mulu, __udivmod, __dmcx, __divu, public_prelude, __q2u/D16U/D16U0/..., _errno, public_prelude, _write/wrcountok/wrloop/..., __chkfd/__chkfdl/cfbad, __usep, __offp/__lenp/__apset/..., ... |
_fgets |
167 | ~1125 | __ugvalid, __ugchars, __ugget, __gchr, __ceofst, _errno, public_prelude, _read/rdcon_count/rdcon_loop/..., __chkfd/__chkfdl/cfbad, __rdhit/rdh_cmp/rdh_miss, __rdsto, __usep, ... |
_fopen |
92 | ~1025 | __fclr, __ugvalid, _errno, public_prelude, _open/opflagsok/opfind/..., __usep, __offp/__lenp/__apset/..., __fcbp, __setrr/setrr_big, __zerdm/__fcbfresh, __mkfcb/mfspc/mfnoprefix/..., __rwerr/rwe_mark/__seter, ... |
_write |
207 | ~884 | _errno, public_prelude, __chkfd/__chkfdl/cfbad, __usep, __offp/__lenp/__apset/..., __fcbp, __setrr/setrr_big, __chunk/ch_more128/ch_have_count/..., __advio/__extln/extln_diff/..., __zerdm/__fcbfresh, __rwerr/rwe_mark/__seter, __ebadf, ... |
_lseek |
123 | ~679 | __ugvalid, _errno, public_prelude, __chkfd/__chkfdl/cfbad, __usep, __offp/__lenp/__apset/..., __fcbp, __setrr/setrr_big, __rwerr/rwe_mark/__seter, __ebadf, __einval, __nospc/__slot/__chnk/..., ... |
_read |
177 | ~958 | __ugvalid, __ugchars, __ugget, __gchr, __ceofst, _errno, public_prelude, __chkfd/__chkfdl/cfbad, __rdhit/rdh_cmp/rdh_miss, __rdsto, __usep, __offp/__lenp/__apset/..., ... |
_open |
230 | ~916 | __ugvalid, _errno, public_prelude, __usep, __offp/__lenp/__apset/..., __fcbp, __setrr/setrr_big, __zerdm/__fcbfresh, __mkfcb/mfspc/mfnoprefix/..., __rwerr/rwe_mark/__seter, __enoent, __ioerr, ... |
_close |
56 | ~245 | __ugvalid, _errno, public_prelude, __chkfd/__chkfdl/cfbad, __usep, __fcbp, __rwerr/rwe_mark/__seter, __ioerr, __ebadf, __nospc/__slot/__chnk/..., public_prelude, __rdcv, ... |
_unlink |
40 | ~274 | _errno, public_prelude, __mkfcb/mfspc/mfnoprefix/..., __rwerr/rwe_mark/__seter, __enoent, __nospc/__slot/__chnk/..., public_prelude, __fderr |
_fclose |
12 | ~257 | __ugvalid, _errno, public_prelude, _close/clok/clbad/..., __chkfd/__chkfdl/cfbad, __usep, __fcbp, __rwerr/rwe_mark/__seter, __ioerr, __ebadf, __nospc/__slot/__chnk/..., public_prelude, ... |
Memory (stdlib.h)¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_calloc |
34 | ~580 | __wr_hf, __mulu, __udivmod, __dmcx, __divu, public_prelude, __q2u/D16U/D16U0/..., __ckmul, __mlh |
__real |
251 | ~615 | __wr_hf, __frcoal, __mlh |
_malloc |
9 | ~255 | __wr_hf, __mlh |
_free |
8 | ~164 | __wr_hf, __frcoal |
16-bit integer and sort/search¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_qsort |
176 | ~259 | __call_hl, __mulu |
_bsearch |
100 | ~183 | __call_hl, __mulu |
__stol |
13 | ~1067 | __mulu, _errno, __lmul, __ldu, __lmu, __lgu, __lmd, __lrlo, __lrhi, public_prelude, sc_isspace/SCL4/SCL8, sc_isdigit/SCL13/SCL21/..., ... |
__stou |
489 | ~1054 | __mulu, _errno, __lmul, __ldu, __lmu, __lgu, __lmd, __lrlo, __lrhi, public_prelude, sc_isspace/SCL4/SCL8, sc_isdigit/SCL13/SCL21/... |
_atol |
124 | ~124 | nothing beyond own block |
_atoi |
97 | ~97 | nothing beyond own block |
_rand |
46 | ~46 | nothing beyond own block |
_srand |
8 | ~54 | _rand |
_abs |
16 | ~16 | nothing beyond own block |
_labs |
34 | ~34 | nothing beyond own block |
_div |
31 | ~227 | __udivmod, __sdivmod, public_prelude, __q2u/D16U/D16U0/... |
_ldiv |
79 | ~402 | __lmu, __lds, __lmd, __lrlo, __lrhi |
32-bit long arithmetic¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
__lmul |
118 | ~209 | __mulu, __lmd |
__lds |
76 | ~323 | __lmu, __lmd, __lrlo, __lrhi |
__lms |
73 | ~320 | __lmu, __lmd, __lrlo, __lrhi |
__ldu |
22 | ~269 | __lmu, __lmd, __lrlo, __lrhi |
__lmu |
221 | ~247 | __lmd, __lrlo, __lrhi |
__lts |
41 | ~41 | nothing beyond own block |
__ltu |
28 | ~28 | nothing beyond own block |
Float operators and conversions¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
__fadd |
9 | ~976 | __fsub, FPACKR, FUNR, FPKR, FSHR, __frnd, __fdiv |
__fmul |
399 | ~1114 | __m1u, __m8u, FPACKR, FPKR, FSHR, __frnd, __fprd, __fdiv |
__fdiv |
376 | ~491 | FSHR |
__flt |
- | - | not found |
__feq |
- | - | not found |
__fif |
15 | ~46 | __fuf |
__ffi |
29 | ~64 | __ffu |
__flf |
28 | ~77 | __fulf |
__ffl |
41 | ~91 | __fful |
math.h float functions¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_powf |
252 | ~3245 | _errno, __m1u, __m8u, __fzro, __fnan, __finf, __fcmpsf, __fltf, __fgtf, __flef, __fuf, __fif, ... |
_tanhf |
108 | ~2639 | _errno, __m1u, __m8u, __fcmpsf, __fltf, __fgtf, __flef, __faf, __fsf, __fsub, FPACKR, FUNR, ... |
_sinhf |
70 | ~2574 | _errno, __m1u, __m8u, __finf, __fcmpsf, __fltf, __flef, __faf, __fsf, __fsub, FPACKR, FUNR, ... |
_coshf |
58 | ~2562 | _errno, __m1u, __m8u, __finf, __fcmpsf, __fltf, __flef, __faf, __fsf, __fsub, FPACKR, FUNR, ... |
_expf |
274 | ~2426 | _errno, __m1u, __m8u, __fcmpsf, __fltf, __flef, __faf, __fsf, __fsub, FPACKR, FUNR, FPKR, ... |
_tanf |
247 | ~2567 | _errno, __m1u, __m8u, __fnan, __finf, __fcmpsf, __fltf, __fgtf, __faf, __fsf, __fsub, FPACKR, ... |
_acosf |
25 | ~2630 | _errno, __m1u, __m8u, __fzro, __fnan, __finf, __fcmpsf, __fltf, __fgtf, __faf, __fsf, __fsub, ... |
_atan2f |
234 | ~2545 | __m1u, __m8u, __fnan, __finf, __feqf, __fcmpsf, __fltf, __fgtf, __flef, __faf, __fsf, __fsub, ... |
_log10f |
26 | ~2462 | _errno, __m1u, __m8u, __fzro, __fnan, __finf, __fcmpsf, __fgtf, __fuf, __fif, __faf, __fsf, ... |
_asinf |
301 | ~2605 | _errno, __m1u, __m8u, __fzro, __fnan, __finf, __fcmpsf, __fltf, __fgtf, __faf, __fsf, __fsub, ... |
_logf |
232 | ~2436 | _errno, __m1u, __m8u, __fzro, __fnan, __finf, __fcmpsf, __fgtf, __fuf, __fif, __faf, __fsf, ... |
_cosf |
238 | ~2517 | _errno, __m1u, __m8u, __fnan, __finf, __fcmpsf, __fltf, __fgtf, __faf, __fsf, __fsub, FPACKR, ... |
_sinf |
218 | ~2497 | _errno, __m1u, __m8u, __fnan, __finf, __fcmpsf, __fltf, __fgtf, __faf, __fsf, __fsub, FPACKR, ... |
_atanf |
244 | ~2148 | __m1u, __m8u, __fcmpsf, __fltf, __fgtf, __faf, __fsf, __fsub, FPACKR, FUNR, FPKR, FSHR, ... |
_sqrtf |
221 | ~2250 | _errno, __m1u, __m8u, __fzro, __fnan, __finf, __fcmpsf, __fltf, __faf, __fsf, __fsub, FPACKR, ... |
_modff |
180 | ~1190 | __fsf, __fsub, FPACKR, FUNR, FPKR, FSHR, __frnd, __fdiv, public_prelude |
_fmodf |
335 | ~392 | _errno, __fnan, __finf, public_prelude, __medom |
_ldexpf |
249 | ~307 | _errno, __fnan, __finf, public_prelude, __merng |
_nextafterf |
259 | ~527 | _errno, __fzro, __fnan, __feqf, __fcmpsf, __fltf, public_prelude, __merng |
_floorf |
11 | ~110 | public_prelude, __frint/frint_right/frint_floor_adjust/... |
_ceilf |
22 | ~121 | public_prelude, __frint/frint_right/frint_floor_adjust/... |
_frexpf |
128 | ~175 | __fnan, __finf |
_fabsf |
13 | ~13 | nothing beyond own block |
string.h / ctype.h¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
__sdup |
44 | ~305 | __wr_hf, __slf, __mlh |
__sstr |
115 | ~115 | nothing beyond own block |
__stok |
111 | ~196 | __spbr, __sspn |
__mset |
44 | ~44 | nothing beyond own block |
__mcpy |
25 | ~25 | nothing beyond own block |
__scpy |
12 | ~12 | nothing beyond own block |
__slen |
17 | ~32 | __slf |
__caa |
19 | ~35 | __ctarg |
__ctu |
24 | ~24 | nothing beyond own block |
__schr |
45 | ~45 | nothing beyond own block |
__srch |
35 | ~35 | nothing beyond own block |
__mcmp |
25 | ~25 | nothing beyond own block |
__mchr |
14 | ~14 | nothing beyond own block |
CP/M extensions and misc¶
| Symbol | self | marginal | pulls in |
|---|---|---|---|
_perror |
58 | ~139 | _strerror, _errno |
_dopn |
78 | ~349 | _errno, public_prelude, __mkfcb/mfspc/mfnoprefix/..., __rwerr/rwe_mark/__seter, __einval, __emfil, __nospc/__slot/__chnk/..., public_prelude, __fderr, _dcls |
_drd |
96 | ~445 | _errno, public_prelude, __mkfcb/mfspc/mfnoprefix/..., __rwerr/rwe_mark/__seter, __einval, __emfil, __nospc/__slot/__chnk/..., public_prelude, __fderr, _dopn, _dcls |
_strerror |
77 | ~77 | nothing beyond own block |
_setjmp |
58 | ~58 | nothing beyond own block |
_longjmp |
90 | ~90 | nothing beyond own block |
_bdos |
11 | ~39 | __bdosf |
_inp |
14 | ~14 | nothing beyond own block |
_outp |
18 | ~18 | nothing beyond own block |
__stchk |
72 | ~72 | nothing beyond own block |