Mark Morgan Lloyd wrote:
Regarding Marks attempt - if I understand it correctly (based on
information in Wikipedia ;-) ), Sparc v7 supports no HW multiplication /
division. So a simple check may be to write a one liner containing
multiplication, compiling it with any ppcsparc (or ppccrosssparc) while
using the -s parameter and then checking the generated assembly for
use of
the mul/div asm instructions...
Using this test input:
program test789;
const a= 3;
var b, c: integer;
begin
b := 5;
c := b * a
end.
Output (test789.s) files are identical containing
# [9] c := b * a
sethi %hi(U_P$TEST7_B),%o0
ldsh [%lo(U_P$TEST7_B)+%o0],%o0
smul %o0,3,%o0
I agree that smul is new to v8, but I don't know to what extent OSes on
older chips would emulate it (the v8 manual suggests this as a possibility).
In any event, the -Cp parameter doesn't appear to be being carried
through to the ELF info generated by ld, in all cases it reports
ELF 32-bit MSB executable, SPARC32PLUS, V8+ Required, version 1 (SYSV),
statically linked, stripped
which is probably inappropriate in the case of v7. Hmm. On a Solaris 8
system I notice
/usr/local/bin/gld: ELF 32-bit MSB executable SPARC Version 1,
dynamically linked, stripped
while FPC compiled on the same machine is described as
/usr/local/bin/fpc: ELF 32-bit MSB executable SPARC32PLUS Version 1,
V8+ Required, dynamically linked, not stripped
--
Mark Morgan Lloyd
markMLl .AT. telemetry.co .DOT. uk
[Opinions above are the author's, not those of his employers or colleagues]
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