ni...@lysator.liu.se (Niels Möller) writes:
Below patch adds a helper function for tuning *_METHOD values,
evaluated at some fix size. What do you think?
It helps with some function comments, outlining what a function does,
and what its arguments mean.
Please consider adding that before comm
ni...@lysator.liu.se (Niels Möller) writes:
Sounds good. Give it a few days, and delete if it still looks slow
everywhere.
I cooked a modern alternative:
static mp_double_limb_t
div1 (mp_limb_t n0, mp_limb_t d0)
{
mp_double_limb_t res;
int ncnt, dcnt, cnt;
mp_limb_t q;
mp_limb_t mask
And please take a screenshot of the affected parameters before and
after this change, as a sanity check.
I added a history preservation feature to the .../devel/thres/ pages. At
23:59 each night, all pages are copied to .../devel/thres/-MM-DD.
(There is no index, one needs to type in the
Provide c/l results on some MIPS32 CPUs.
diff -r ed6ddbb7a15b -r 0ba6f9f13912 mpn/mips32/addmul_1.asm
--- a/mpn/mips32/addmul_1.asm
+++ b/mpn/mips32/addmul_1.asm
@@ -31,6 +31,13 @@
include(`../config.m4')
+C cycles/limb
+C 4KEc 16.33
+C 24Kc 18.04
+C 24KEc
Add MIPS32R2 RDHWR-based cycle counter support.
diff -r 0ba6f9f13912 -r 6ab06c72027e configure.ac
--- a/configure.ac
+++ b/configure.ac
@@ -1035,7 +1035,11 @@
path_64="mips64/hilo mips64"
;;
esac
-
+;;
+
+ mipsisa32r2*-*-*)
+SPEED_CYCLECOUNTER_O
Add MIPS32R1 MADDU-based *mul_1.asm functions.
The code tries to keep the [accidental] property of MIPS-II counterparts:
constant-time operation on 32x16 MDUs as found on e.g. 4KEc and some low-
end MCUs. Even if that is unimportant, the performance cost is invisible.
It is faster on all tried MI
i...@mobile-stream.com writes:
Add MIPS32R2 RDHWR-based cycle counter support.
Does that work in user mode for all *nix ports?
Does it not also work in r3, r4, r5? And r6?
Is there are mipsisa64 counterpart?
--
Torbjörn
Please encrypt, key id 0xC8601622
T> Add MIPS32R2 RDHWR-based cycle counter support.
T> Does that work in user mode for all *nix ports?
don't know.
basing on a quick grep:
openbsd, freebsd seem to only allow ULR but never CC/CCRes;
netbsd seems to enable everything in HWREna including CC, CCRes.
T> Does it not also work in r3
Mobile Stream writes:
T> Add MIPS32R2 RDHWR-based cycle counter support.
T> Does that work in user mode for all *nix ports?
don't know.
basing on a quick grep:
openbsd, freebsd seem to only allow ULR but never CC/CCRes;
netbsd seems to enable everything in HWREna including CC, CCR
