Eric W. Biederman wrote:
Eric, What is the "effective" or "equalvalent" stack size of ROMCC ? Is 448 bytes of stack adquant for ROMCC "linted" code in general ?
8 (gpr) + 8 (mmx) + 8 (sse) registers each 4 bytes long = 96 bytes.
Looking at the hdama configuration my max inline depth is 14
procedures so that likely totals to another 14 *4 = 56 bytes in
return addresses. So 448 bytes would be a small improvement.
Note generally I have noticed romcc compiled does not even use all of
the registers...
For comparison when using U-Boot for PPC:
"Note: on PPC, we could use a static initializer (since the address of the global data structure is known at compile time), but it turned out that reserving a register results in somewhat smaller code - although the code savings are not that big (on average for all boards 752 bytes for the whole U-Boot image, 624 text + 127 data)."
-Bari
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