search for: __divsi3

...quot; (introduced October 1985) is a 32-bit processor, it has instructions to divide 64-bit integers by 32-bit integers, and to multiply two 32-bit integers giving a 64-bit product! I expect that a library written 20+ years later takes advantage of these instructions! __divsi3 (18 instructions) perform a DIV after 2 calls of abs(), plus a final negation, instead of just a single IDIV __modsi3 (14 instructions) calls __divsi3 (18 instructions) __divmodsi4 (17 instructions) calls __divsi3 (18 instructions) __udivsi3 (5...

...39;s the patch, patterned after the correct implementation in umodsi3.c: diff --git a/lib/compiler-rt/lib/modsi3.c b/lib/compiler-rt/lib/modsi3.c index 388418a..3759ce0 100644 --- a/lib/compiler-rt/lib/modsi3.c +++ b/lib/compiler-rt/lib/modsi3.c @@ -16,8 +16,10 @@ /* Returns: a % b */ +su_int __divsi3(si_int a, si_int b); + si_int __modsi3(si_int a, si_int b) { - return a - (a / b) * b; + return a - __divsi3(a, b) * b; } Best, Matt

...cessor, it has instructions to divide 64-bit >> integers by 32-bit integers, and to multiply two 32-bit >> integers giving a 64-bit product! >> I expect that a library written 20+ years later takes >> advantage of these instructions! >> >> __divsi3 (18 instructions) perform a DIV after 2 calls of abs(), >> plus a final negation, instead of just >> a single IDIV >> __modsi3 (14 instructions) calls __divsi3 (18 instructions) >> __divmodsi4 (17 instructions) calls __di...

...sters and external symbols so our proposal is to swap the sigil used for external symbols ('$') for the ampersand ('&') and re-purpose dollar-sign for physregs so that physregs have the dollar-sign sigil and vregs have the percentage ('%') sigil: essentially: BL *&*__divsi3 ... ... $eax = ... %123 = ... %vregFooBar = ... I have an initial patch attached (replaces '$' for '&' for external symbols). Hoping to open some dialog with the community before doing more implementation work. Thanks PL -------------- next part -------------- An HTML at...

...symbols so our proposal is to swap the sigil used for external symbols ('$') for the ampersand ('&') and re-purpose dollar-sign for physregs so that physregs have the dollar-sign sigil and vregs have the percentage ('%') sigil: > > essentially: > > BL &__divsi3 ... > > ... > > $eax = ... > > %123 = ... > > %vregFooBar = ... > > > I have an initial patch attached (replaces '$' for '&' for external symbols). Hoping to open some dialog with the community before doing more implementation work. > &...

...proposal is to swap the sigil used for external > symbols ('$') for the ampersand ('&') and re-purpose dollar-sign for > physregs so that physregs have the dollar-sign sigil and vregs have the > percentage ('%') sigil: > > essentially: > > BL *&*__divsi3 ... > > ... > > $eax = ... > > %123 = ... > > %vregFooBar = ... > > > I have an initial patch attached (replaces '$' for '&' for external > symbols). Hoping to open some dialog with the community before doing more > implementation work. &gt...

...il used for external >> symbols ('$') for the ampersand ('&') and re-purpose dollar-sign for >> physregs so that physregs have the dollar-sign sigil and vregs have the >> percentage ('%') sigil: >> >> essentially: >> >> BL *&*__divsi3 ... >> >> ... >> >> $eax = ... >> >> %123 = ... >> >> %vregFooBar = ... >> >> >> I have an initial patch attached (replaces '$' for '&' for external >> symbols). Hoping to open some dialog with the community...

...-05:00 mort@green.i.bork.org +9 -1 B hpa@zytor.com|ChangeSet|20020723064121|00000|f8a756c36aa22cad C c Add a bunch of libgcc objects. K 41984 O -rw-rw-r-- P klibc/arch/ia64/Makefile.inc ------------------------------------------------ D13 1 I13 9 arch/$(ARCH)/pipe.o \ libgcc/__divdi3.o \ libgcc/__divsi3.o \ libgcc/__udivdi3.o \ libgcc/__udivsi3.o \ libgcc/__umodsi3.o \ libgcc/__umoddi3.o \ libgcc/__udivmodsi4.o \ libgcc/__udivmoddi4.o # Patch checksum=c61569d9 -------------- next part -------------- A non-text attachment was scrubbed... Name: klibc-libgcc-fixes.diff Type: text/x-patch Size:...

...index 49070ff3..41b8ca06 100644 --- a/usr/klibc/arch/ia64/Kbuild +++ b/usr/klibc/arch/ia64/Kbuild @@ -2,7 +2,7 @@ # klibc files for ia64 # -klib-y := vfork.o setjmp.o pipe.o syscall.o +klib-y := vfork.o setjmp.o sigaction.o pipe.o syscall.o klib-y += ../../libgcc/__divdi3.o ../../libgcc/__divsi3.o klib-y += ../../libgcc/__udivdi3.o ../../libgcc/__udivsi3.o diff --git a/usr/klibc/arch/ia64/sigaction.c b/usr/klibc/arch/ia64/sigaction.c new file mode 100644 index 00000000..c1ea5fdd --- /dev/null +++ b/usr/klibc/arch/ia64/sigaction.c @@ -0,0 +1,50 @@ +/* + * sigaction.c + */ + +#include &l...

...index 49070ff3..41b8ca06 100644 --- a/usr/klibc/arch/ia64/Kbuild +++ b/usr/klibc/arch/ia64/Kbuild @@ -2,7 +2,7 @@ # klibc files for ia64 # -klib-y := vfork.o setjmp.o pipe.o syscall.o +klib-y := vfork.o setjmp.o sigaction.o pipe.o syscall.o klib-y += ../../libgcc/__divdi3.o ../../libgcc/__divsi3.o klib-y += ../../libgcc/__udivdi3.o ../../libgcc/__udivsi3.o diff --git a/usr/klibc/arch/ia64/sigaction.c b/usr/klibc/arch/ia64/sigaction.c new file mode 100644 index 00000000..e512bdcd --- /dev/null +++ b/usr/klibc/arch/ia64/sigaction.c @@ -0,0 +1,50 @@ +/* + * sigaction.c + */ + +#include &l...

...e <stdint.h> diff -ruN klibc-0.114_orig/klibc/libgcc/__udivsi3.c klibc-0.114/klibc/libgcc/__udivsi3.c --- klibc-0.114_orig/klibc/libgcc/__udivsi3.c 2002-09-16 09:45:47.000000000 -0700 +++ klibc-0.114/klibc/libgcc/__udivsi3.c 2004-02-22 04:39:00.000000000 -0800 @@ -1,5 +1,5 @@ /* - * libgcc/__divsi3.c + * libgcc/__udivsi3.c */ #include <stdint.h> diff -ruN klibc-0.114_orig/klibc/libgcc/__umoddi3.c klibc-0.114/klibc/libgcc/__umoddi3.c --- klibc-0.114_orig/klibc/libgcc/__umoddi3.c 2002-08-27 22:16:15.000000000 -0700 +++ klibc-0.114/klibc/libgcc/__umoddi3.c 2004-02-22 04:39:00.00000000...

This fixes a long standing issue where it was not possible to do "make usr/klibc/arch/x86_64/longjmp.o" in the kernel. The principle is that all .o files to be part of klibc are listed with klib-y. For each directory a klib.list file is made that specify all .o file and the final AR then adds all .o files to create libc.a. This patch introduce the infrastructure and converts x86_64 to

...architecture. Note that this is actually +# included from the main Makefile, and that pathnames should be +# accordingly. +# + +KLIBCARCHOBJS = \ + arch/$(KLIBCARCH)/vfork.o \ + arch/$(KLIBCARCH)/setjmp.o \ + arch/$(KLIBCARCH)/pipe.o \ + arch/$(KLIBCARCH)/syscall.o \ + libgcc/__divdi3.o \ + libgcc/__divsi3.o \ + libgcc/__udivdi3.o \ + libgcc/__udivsi3.o \ + libgcc/__umodsi3.o \ + libgcc/__umoddi3.o \ + libgcc/__udivmodsi4.o \ + libgcc/__udivmoddi4.o + +KLIBCARCHSOOBJS = $(patsubst %o,%.lo,%(KLIBCARCHOBJS)) + +archclean: diff --git a/usr/klibc/arch/ia64/crt0.S b/usr/klibc/arch/ia64/crt0.S new file mod...

I have updated the klibc patchset based on feedback received. In particular, the patchset has been reorganized so as not to break git-bisect. Additionally, this updates the patch base to 2.6.17-git12 (d38b69689c349f35502b92e20dafb30c62d49d63) and klibc 1.4.8; the main difference on the klibc side is removal of obsolete code. This is also available as a git tree at:

Hello everyone, this is the fourth version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See

Hello everyone, this is the very first version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See