Ask for copyright assignment forms for gcc

Hello, It will be appreciated if anyone could help send me the copyright assignment forms. I need them to submit patches to gcc. I think it should be an assignment for all future changes. Thanks Eric

[vect, gccint] Mistake about Vector-specific attributes?

Hi, In gccint, 7.2.3.3 Vector-specific attributes, there are two items talking about vect_int_mult: vect_int_mult Target supports a vector widening multiplication of short operands into an int result, or supports promotion (unpacking) from short to int and a non-widening multiplication of

Re: Tree Browser

Hi, Try using gcc-vcg-plugin to browse tree and cfg during debug gcc. It's just an initial version for now. Any suggestions will be appreciated. :-) http://code.google.com/p/gcc-vcg-plugin/ Thanks, Eric Fisher

a gcc plugin to show cfg graphically when debug gcc

Hi, I just wrote a little gcc plugin, which can be used to show GIMPLE cfg graphically when debug gcc. Currently, it's still a very initial version. It, * transfers tree dump into vcg file, * then invokes vcgview (or aisee etc.) to show the graph. I would like to improve it to support both

Jump threading bug?

Hi, I'd like to put the test case and results on trunk here, - void foo (int x) { int i; for (i=0; i 10 ; i++) if (x) { if (i == 0) fun_1 (); else fun_2 (); } } --- $ gcc -O3

Re: Jump threading bug?

See the attachment for the cfg pictures. Thanks, Eric foo_vcg.tar Description: Unix tar archive

Re: threading jumps makes niter changed from INTEGER_CST to chrec_dont_know

2010/1/6 Jeff Law l...@redhat.com: Please file a bug report with a complete testcase so that we can see what's happening rather than trying to speculate. jeff Uh, seems this problem doesn't occur on trunk. Because before pass_dominator, pass_complete_unrolli is able to unroll the following

trunk, bootstrap comparison failure

Hi, When I tried to build the last svn version on ia64 and got this failure. Comparing stages 2 and 3 warning: gcc/cc1obj-checksum.o differs warning: gcc/cc1-checksum.o differs warning: gcc/cc1plus-checksum.o differs Bootstrap comparison failure! gcc/cp/name-lookup.o differs make[2]: ***

threading jumps makes niter changed from INTEGER_CST to chrec_dont_know

Hi, I found that sometimes -fno-tree-dominator-opts will bring a big speed promotion. This is because that pass_dominator tries to thread jumps. But sometimes this will cause that the loop's exit bb does not dominator its latch bb again. Then pass_complete_unroll is unable to know the exact

Wunreachable-8.c XPASS with flags '-O2 -Wunreachable-code'

Hi, gcc.log Executing on host: /media/E/svn-gcc/build-trunk/gcc/xgcc -B/media/E/svn-gcc/build-trunk/gcc/ /media/E/svn-gcc/trunk/gcc/testsuite/gcc.dg/Wunreachable-8.c -O2 -Wunreachable-code -S -o Wunreachable-8.s(timeout = 300)

Should warning of -Wunreachable-code be generated when optimization is taken?

Hi, I run into such an XPASS for trunck. And it seems an old problem. XPASS: gcc.dg/Wunreachable-8.c (test for bogus messages, line 7) /* { dg-do compile } */ /* { dg-options -O2 -Wunreachable-code } */ float Factorial(float X) { float val = 1.0; int k,j; for (k=1; k 5; k++) /* {

Please recommend a good vcg viewer

Hello, I currently use aiSee (demo version) to view vcg dump of gcc. One problem is that the tool works too slowly. The another problem is that graph looks ugly, especially when unforlding a big cfg. Who can recommend me a good vcg viewer? Thanks. Best Regards, Eric

Re: Help on loop peeling

2009/8/15 Sebastian Pop seb...@gmail.com: You should put a TODO_update_ssa in the flags of prefetching pass. With the attached patch I don't see an error. Thanks. Finally, I figure out that it's because that after copying the loop, I should have created a preheader to ensure that new_loop's

Re: Help on loop peeling

2009/8/13 Sebastian Pop seb...@gmail.com: Could you please send the patch you are working on, together with a reduced testcase?  This could help to reproduce the error. Thanks. I put the patch and a test below. The patch is based on 4.4.0. It's just a toy, I haven't a nice design for now.

Help on loop peeling

Hi, I'm implementing a loop peeling function used in tree-ssa-loop-prefetch.c according to the following comment, /* Step 5: unroll the loop. TODO -- peeling of first and last few iterations so that we do not issue superfluous prefetches. */ I take the functions slpeel_* in

implement tree_peeling_loop

Hi, Is it useful to implement a high-level universal function tree_peeling_loop in tree-ssa-loop-manip.c? I want call it in tree-ssa-loop-prefetch.c. If yes, can anyone give me some clues? I find currently, vect_do_peeling_for_loop_bound is doing a similar work in tree-vect-transform.c.

Is GDE available for now?

Hi, I read the paper The Visual Development of GCC Plug-ins with GDE from gcc summit 2009. It's a powerful tool. So where can I get it to help me debug and study gcc? Thanks a lot. Eric

Any comment about the replacement of gcc news?

Hello Sorry, I hope it's not an offensive or boring topic. Some of my friends asked me if it's true that gcc will be replaced by other compilers on a few OS and what is the problem. Any comment? Best wishes Eric Fisher

Do we have optimizations to reduce cache miss?

Hi, I just want to ask whether we have any special pass to reduce cache miss? Or any idea or branch to enhance it. Thanks Eric Fisher

[lto] LDFLAGS get lost in stage2

-standard path But, lto-plugin is failed in stage2 with the error /usr/bin/ld: cannot find -lelf I look into the Makefile and find that LDFLAGS is set as BOOT_LDFLAGS scine stage2, so I have to set this variable also. Is it a right way that it should go? Best wishes, Eric Fisher

a mistake in gccint doc

of variable @code{b}. Real definition are also known as @dfn{killing definitions}. Similarly, the use of @code{b} reads all its bits. Eric Fisher May 15, 2009

Re: a mistake in gccint doc

2009/5/16 Diego Novillo dnovi...@google.com: On Fri, May 15, 2009 at 02:12, Eric Fisher joefoxr...@gmail.com wrote: I think it's a mistake between a and b. It should be, variable @code{a} is completely modified with the contents of variable @code{b}.  Real definition are also known as @dfn

Re: improve -fverbose-asm option

also a problem which is that the user need to consider the length of the function name and length of the label string buff. Best regards, Eric Fisher Mar 17, 2009

improve -fverbose-asm option

with the same name. Perhaps it's again the -fverbose-asm to enable this functionality. But where should I go if I wanna implement this functionality? Cheers, Eric Fisher Mar 16, 2009

Re: questions about find_if_case

It avoids a branch instruction. For the first case, the path via x = a is test - jump - set - jump (where set is th x = a-instruction). This becomes set - test - jump. So one jump less. Thank you very much for the detailed explanation. However, I have a doubt here. IMO, the path via x=a

questions about find_if_case

Hi, For if-conversion pass (pass_if_after_combine), we can see there're some IF-THEN-ELSE cases which we try to transform. Let's say find_if_case_1, for an example. (1) if (test) goto over; // x not live x = a; goto label; over: becomes x = a;

Re: change to gcc from lcc

Interesting. At least. There should be a warning from gcc. Eric 2008/11/14 Tim München [EMAIL PROTECTED]: On Friday 14 November 2008 10:09:22 Anna Sidera wrote: Hello, The following code works in lcc in windows but it does not work in gcc in unix. I think it is memory problem. In lcc there

Re: apply maintainer?

Ah, maybe I should say contributor. Best regards, Eric 2008/11/12 Manuel López-Ibáñez [EMAIL PROTECTED]: 2008/11/11 Eric Fisher [EMAIL PROTECTED]: Hello, Anyone could tell how to be a gcc maintainer? Is there any requirement? Actually, my previous work are all not based on the gcc trunk

apply maintainer?

Hello, Anyone could tell how to be a gcc maintainer? Is there any requirement? Actually, my previous work are all not based on the gcc trunk. So no patch submitted. Anyway, it's cool to contribute :-) Thanks. Eric Fisher 2008-11-11

Re: A happy problem caused by loongson2f's div.g instruction

So I think one of the possible solution would be to reverse the div.g and teq insn. And I think this is not hard to do, just modify mips_output_division() function. Also I think this is a better solution, since we can save a register. Do you mean the modification like this? + + +/* Used

[MIPS]question about floating point conditional branch

'branch' insns? Is it OK? Eric Fisher 2008-11-3

build gcc-4.4.0 20081022 failed on loongson2f

/ --with-mpfr=/home/xmj/install/mpfr-2.3.1/ Thread model: posix gcc version 4.4.0 20081022 (experimental) (GCC) $uname -a Linux tini-boy 2.6.18.1-fl2f-pc-v1.1.0 #66 Fri Sep 12 13:03:52 EDT 2008 mips64 GNU/Linux Is it a bug? Eric Fisher 2008-10-24

noticed a mistake on the instruction scheduling paper

|| ReadyTry[0] ... here should be if n 0 ReadyTry[0] since 'the algorithm guarantees that the instruction with the highest priority will be issued on the current cycle).' Of course, implemented code in gcc is right :-) Eric Fisher 2008-9-9

Re: looking for loongson support

PROTECTED]: Eric Fisher wrote: hi Is there anyone working on the loongson support of gcc? I notice that loongson has been added into the currently developing binutils. Eric, I will start working on submitting Loongson patches developed at CodeSourcery next week. These patches include

looking for loongson support

hi Is there anyone working on the loongson support of gcc? I notice that loongson has been added into the currently developing binutils. ericfisher

why don't have 'umul' rtx code

hi I'm not clear why we have 'udiv', but don't have 'umul' for Standard Pattern Names. Does I need to define a nameless pattern for it? Thanks in advance. eric

small changes of gdbinit.in

I guess that the argument of the user defined command in gdbinit.in should be $arg0. Also, due to the changes of the structure tree node, ptc should be, define ptc -output (enum tree_code) $.common.code +output (enum tree_code) $arg0.base.code echo \n end Here's the patch, --- gcc/gdbinit.in

a problem when building gcc3.2.1

hi, I configure GCC as follow: PATH=/gnutools/bin:$PATH ; export PATH mkdir -p /tmp/build/gcc cd /tmp/build/gcc /src/gcc-3.2.1/configure --target=mipsel-elf \ --prefix=/gnutools --enable-languages=c,c++ \ --with-gnu-as --with-gnu-ld --with-newlib \ --without-headers --disable-shared

can we define a comment?

hi, Anybody knows that if we can define a comment? For a statement such as, COMMENT this is a comment. will be preprocessed as, // this is a comment. or something valid and transparent to the compiler? Of cause we can't directly use, #define COMMENT // Thanks. Eric.

Re:question about treelang modification and debug

Seems the question has been solved, here is the changes of treelang/parse.y, just for fun :-) $ diff treelang/parse.y treelang/parse_new.y -u --- treelang/parse.y2004-01-08 15:50:46.0 +0800 +++ treelang/parse_new.y2006-04-13 18:00:34.390625000 +0800 @@ -48,6 +48,7 @@ #include

Question about build error

hi, When I build gcc-3.2.2 for mips target, there's an error. What's the problem? Thanks Eirc ake[1]: Leaving directory `/home/cii/qwang_gcc/libiberty' xgcc: specs file malformed after 4096 characters xgcc: specs file malformed after 4096 characters xgcc: specs file malformed after 4096

question about treelang modification and debug

hi, You know that treelang prescribes the function prototype must give the storage class type explicitly, for an example, external_definition int add(int arg1, int arg2); I'd like to know how to modify the parse.y to let the storage type can be implicitly and the default type is

how to run shared file on simulator

Hi, I've ported gcc to mytarget-linux version. The object file compiled now are shared one. My current simulator is able to run static executable program and just translate binary code one by one. I know shared file needs dynamic linker to load. So I'd like to know can I run shared file on my sim?

mips-elf-linux and mips-linux-elf, another puzzler

Hi, After talking about mips-elf, mips-linux, mips-elf-linux-gnu, my friend told that there is also a target of mips-linux-elf. My God, confused. Yours, Eric.

question about default options of mips

Hi, I installed cross gcc3.4.4 on my linux/pc server with --target=mips-elf. When I use mips-linux-gcc to compile a c file, the assembly code will have psuedo-op used for system v.4 (e.g. .cpload). And the object file is of big endian. So I have to use flag -mno-abicalls and -EL every time. Are

Re: question about default options of mips

But, they told me that mips-elf is for 'no-opsys' target, and does't support glibc. So if I want to use gcc for operantion system and glibc, should I use mipsel-linux? Thanks 27 Feb 2006 22:55:48 -0800, Ian Lance Taylor ian@airs.com: Eric Fisher [EMAIL PROTECTED] writes: I installed cross

Re: question about default options of mips

I think we shouldn't make abicalls as default in my opinion. :-) 2006/2/28, Eric Christopher [EMAIL PROTECTED]: On Feb 27, 2006, at 11:01 PM, Eric Fisher wrote: But, they told me that mips-elf is for 'no-opsys' target, and does't support glibc. So if I want to use gcc for operantion system

can't create crtbegin.o: Invalid bfd target

Hello, My port is originally aimed for mytarget-elf and has been able to built to use. Now I want to use another target, mytarget-linux, just like mips-elf and mips-linux. Binutils is ok and has been installed, but when build gcc, there is such a error, /home/smj/build_gcc_linux/gcc/xgcc

confused by mips target

Hi, I'm really confused by mips targets, such as mips-elf, mips-linux, mips-elf-linux, mips-elf-linux-gnu. I will appreciate if anyone can tell me the difference between them. Thanks. Eric.

question about pic and relocation

Hi, Given such a source file, /*fun.c*/ int b=2; void fun(void) { int a=b; } Then compile it, $ mips-elf-gcc -shared -fpic fun.c -o fun.so -save-temps We can see this below from fun.s, lw $2,%gp_rel(b)($28) I think symble 'b' should be of GOT relocation. But it isn't. $ mips-elf-readelf

another question about branch island

Hi, Thanks for giving directions. I've read the codes about this and got some conception. But I possibly made a mistake, I think. For the linker, ppc64elf.em and elf64-ppc.c have the solution. For the gcc, rs6000.c also has the solution. There is a mail, [tree-ssa] -longcall branch islands for

What is the MIPS Constraints 'c' and 'j'

Hi, While I read the mips.md, I find there are some constraints used in function call templates, such as 'c' and 'j'. But these two constraints seem not be defined and I can't find their explanation both in source files and gcc internal. Well, aren't there anywhere I missed? Otherwise, how can

a question about pc-relative branch and function call

Hi, Happy Valentine's Day. Suppose I have only pc-relative branch instructions such as 'b offset' and don't have pc-region branch instructions such as 'j target'. So what the function call should be translated? Do I have to always use two instructions such as 'la reg, func' and 'b reg'? Especially

Re: a question about pc-relative branch and function call

, Eric Fisher wrote: Suppose I have only pc-relative branch instructions such as 'b offset' and don't have pc-region branch instructions such as 'j target'. So what the function call should be translated? Do I have to always use two instructions such as 'la reg, func' and 'b reg'? Especially

Re: a question about pc-relative branch and function call

the function address anyway. Whatever we do with gcc backend or as/ld. I see. Thanks Eric 2006/2/14, Mike Stump [EMAIL PROTECTED]: On Feb 13, 2006, at 8:31 PM, Eric Fisher wrote: Thanks. I'm working to port gcc to our chip. I use mips-elf as the start. Most chips have this same issue, you can

How to create libgcc_eh.a for mips-elf-gcc?

Hi, I will be appreciated for anyone tell me how to create libgcc_eh.a for mips-elf-gcc. I used this configuration, but failed ../gcc-3.4.4/configure --target=mips-elf --enable-languages=c --enable-shared Yet libgcc_eh.a can be created for local i686 gcc, when use this, ../gcc-3.4.4/configure

re: precompiled headers tests failed

But there are still some failures. I'm not sure if they are okey. The error messages are like these, Executing on host: /home/smj/build_gcc_mips/gcc/xgcc -B/home/smj/build_gcc_mips/gcc/ /home/smj/gcc-3.4.4-mips/gcc/testsuite/gcc.dg/pch/static-1.c -O0 -I. -S -o static-1.s(timeout = 300)

re: precompiled headers tests failed

But there are still some failures. I'm not sure if they are okey. The error messages are like these, Executing on host: /home/smj/build_gcc_mips/gcc/xgcc -B/home/smj/build_gcc_mips/gcc/ /home/smj/gcc-3.4.4-mips/gcc/testsuite/gcc.dg/pch/static-1.c -O0 -I. -S -o static-1.s(timeout = 300)

precompiled headers tests failed

Hi, I think I've got the answer from GCC Bugzilla Bug 11341. It said that this was possibly a known problem with cygwin. For some reason cygwin has always had problems with PCH. Then I run the testsuite on the linux and most of them passed. Thanks for your time. Eric.

precompiled headers tests failed

Hi, I'm wondering whether the precompiled headers tests are ok for mips-elf-gcc 3.4.4 on cygwin. When I run the testsuite for mips-elf-gcc on cygwin using such command, make check-gcc RUNTESTFLAGS=pch.exp The errors are like these following. It seems that there is no common-1.h at all. In

cannot find -lm

Hi, When I run the test suite on my port, there are many many failures with the error like this, ld: cannot find -lm collect2: ld returned 1 exit status I'm not sure whether it is the libm(math library), or it is of glibc. But I guess it is a builtin library of gcc and has nothing to do with

cannot find -lm

Why so many tests need libm? I don't think the tests really used the functions of libm. Can I port glibc to get it? Eirc

help with the conception of floating point

I guess that the macro NGARDS is relevant to the guard digit. But I still failed to have a clear conception about what it means. Others are easy to know by IEEE 754 and What Every Computer Scientist Should Know about Floating-Point Arithmetic. Except, define NGARDS 8L define GARDROUND 0x7f define

help with the conception of floating point

Hi, I'm looking at the fp-bit.h, fp-bit.c, and try to understand the floating point operation simulation. But there are many proper noun hard to get the conception. Such as NGARDS IMPLICIT_1 Are there any details or documents about these? Thanks Eric.

Question about the internal compiler error in verify_local_live_at_start

Hello, When I run the test suite for my port of gcc, there are some failures caused by the optimization flag such as -O2/-O3, and the messages are like, 930120-1.c: In function `f': 930120-1.c:138: internal compiler error: in verify_local_live_at_start, at flow. c:546 It seems that because of

test for excess errors

Hi, Could you tell me what it means for 'test for excess errors'? I run make check-gcc RUNTESTFLAGS='dg.exp' on my machine, and got many failed tests for these errors on my porting gcc. Do I need to setup something in order to run these testsuites for my port? Besides DejaGnu and Tcl. Thanks.

Question about implicit memset invocation

Hello, I'd like to know since gcc implicitly call memset function to perform optimization and my c libraries are unusable for now. Can I take another way? Say don't call memset. How to do that? Yours, Eric.

Gcc Register Allocation

Hello, There are some papers talking about the gcc register allocation in the summit proceedings. I'd like to know wether the graph coloring allocator has been used in the gcc-3.4.4. Also, where can I find some reference of the gcc register allocation, besides the source codes and summit

A question about the global variables initialization.

Hi, I guess it's about the gcc version. Gcc 3.4.4 does put the zero'd variables into bss section. But I'd like to know if the older one does it too. Say 2.95.2 19991024 (release)? Thanks again. Eric.

A question about the global variables initialization.

Hello, For such a program, int a=0; int main(void) { ... } We will see the compiler put the variable 'a' into the bss section. That means that 'a' is a non-initialized variable. I don't know if this is the gcc's strategy. Happy Christmas. Eric.

A question about the global variables initialization.

Yes for zero'd initialized variables, GCC puts them into BSS to say space in the executable. Thanks. But, you say 'to say space in the executable'. I'm not clear what does it mean. Eric.

Questions about long long type

Hello, I have two questions about long long type. Firstly, shall I support it in the machine.md file, or just leave it to libgcc? Dose the libgcc support it if I don't implement in the machine.md file? Secondly, is the long long type equal to DImode in the 32bit machine? Such as adddi3, subdi3.

A question about unable to generate reloads

Hello, Such a problem is difficult to find the reason. But can you give some suggestion about the possible matter? This is the information on my port. Thanks a lot. dp-bit.c: In function `__muldf3': dp-bit.c:957: error: unable to generate reloads for: (insn 416 415 417 20 dp-bit.c:874 (set

Emit insns in the preparation statements of define_expand

Hello, I have a doubt here about define_expand and would be appreciated for your any help. The internals say, Usually these statements prepare temporary registers for use as internal operands in the RTL template, but they can also generate RTL insns directly by calling routines such as emit_insn,

Emit insns in the preparation statements of define_expand

Hey, It's very sorry. I have just found the answer just in the context. It's a so stupid question. DONE Use the DONE macro to end RTL generation for the pattern. The only RTL insns resulting from the pattern on this occasion will be those already emitted by explicit calls to emit_insn within

A question about define_insn and force-reg

(define_insn loadsf [(set (match_operand:SF 0 register_operand =r) (mem:SF (match_operand:SI 1 immediate_operand m)))] This makes no sense, because the constraint means that the mem's operand is an immediate before reload (and you want it to be a register), and a mem after reload.

A question about define_insn and force-reg

Hello, gcc I think it's very interesting. I want to split a insn of loading SF data through SI symbol, such as (set (reg:SF 5 $5) (mem/u/f:SF (symbol_ref/u:SI (*$LC0. I want to it firstly load the address into a register, then load the data through the register. So I define the insn as

A question about RTL output

Hello, This is a strange problem. Why an operantion that should be a 'xorsi3' format, yet it comes out with a 'scond' format. I have defined 'xorsi3' indeed. When I use the encluesive operantion '^', it is ok to emit 'xorsi3'. When I compile the libgcc, it is not ok in _pack_df.o. So what's the

A question about RTL output

It shouldn't. What is the actual error message? Ian Such as follows, dp-bit.c: In function `__pack_d': dp-bit.c:435: error: unrecognizable insn: (insn 33 32 34 0 dp-bit.c:167 (set (reg:SI 159) (ltu:SI (reg:SI 158 [ variable.class ]) (const_int 2 [0x2]))) -1 (insn_list 32

Linker error about relocation

Hello, Sorry, maybe it's not appropriate to put this question here. But I need help. Porting gcc involves the relocation and BFD porting. I've added some relocate type. But after linked, the address is not correct. Are there any documents about the relocation. And what should I do? Thanks. Eric

Questions about comparison insns in mips.md

Hello, Who can explains for me about the comparison insns in mips.md. One question, why there is only define_expand patterns but no define_insn. Supposed that I have a comparison instruction say 'cmp %1, %2', should I implement define_insn patterns for comparison insns? Here is a pattern

fixed registers in mips

Hello, I'd like to ask a question about target macros of registers. In mips.h, the fixed registers are defined as follows: /* By default, fix the kernel registers ($26 and $27), the global pointer ($28) and the stack pointer ($29). This can change depending on the command-line options.

unwind-dw2-fde.c failed on my port

Hi, There is a little progress. I find it's concerned with gcc optimize. When I change the option -O2 to -O0, it passes the make. Of course, I'd like to say there are something wrong in my backend. But, can somebody give me any clue? Thanks. Eric

unwind-dw2-fde.c failed on my port

Hello, It's my new port of gcc. Libgcc is almost compiled for now, except unwind-dw2-fde.c. The error information is '../../gcc-3.4.4/gcc/unwind-dw2-fde.c:968: internal compiler error: in insert_save, at caller-save.c:728 Please submit a full bug report' Of course, there are some thing wrong

lib2funcs and fpbit both rely on each other

Hello, When building Libgcc with new porting gcc, _floatdidf.o failed for undefined symbol _floatsidf. I've been told that _floatsidf is in fpbit.c as _si_to_df.o. Then I modified the libgcc.mk and firstly build fpbit. But _pack_df.o failed for undefined symbol _ashldi3.o which is in libgcc2.c.

Re: lib2funcs and fpbit both rely on each other

2005/9/15, Paul Brook [EMAIL PROTECTED]: On Thursday 15 September 2005 10:59, Eric Fisher wrote: Hello, When building Libgcc with new porting gcc, _floatdidf.o failed for undefined symbol _floatsidf. I've been told that _floatsidf is in fpbit.c as _si_to_df.o. Then I modified

where is the floatsidf?

Hi, Still software floating point. : Thanks for the help. Now I use soft-float to build libgcc, but _floatdidf.o fails for Cannot branch to undefined symbol, __floatsidf. Should I define floatsidf in md file? But I have no floating point registers. Regards. Eric

where is the floatsidf?

Thank you very much about the help. Acctually, I have included fp-bit.c in libgcc.mk. But the order is not right, I think. Because _si_to_df.o is after the _floatdidf.o. Also, how to change _si_to_df.o to _floatsidf.o? In md file? I'm wondering that maybe I needn't to implement libgcc2.a, but

software floating point machine descriptions

Hi, gcc I have to send the new mail again for the software floating point problem. I need more details about it. 1) If I use software floating point, does I need implement float mode insns in md file? Such as movsf, movdf. 2)How to generate correct object files of libgcc2 of floating point

a question about floating point register

Hello, Can anyone give me some suggestions about floating point implemention. My new target doesn't have floating point register. But must I implement the floating point operantion? Libgcc always fails on _floatdifi.o. But how can I implement them? Thanks a lot! Eric.

a question about floating point register

Thank you very much for the suggestion. But are there any more details about them and libgcc. I read the internals but find few information. I will be very appreciated. Best Regards. Eric

glibc or newlib for mips-elf?

If you are running the Linux kernel, then your target is not mips-elf, but rather mips-linux-gnu. For that target, glibc or uclibc is appropriate. Exactly to say, the target is neither mips-elf nor mips-linux-gnu. I just use mips-elf as the start. It's a new target with little endian and own

Re: glibc or newlib for mips-elf?

For a port then yes *-elf is easier to start, especially if you're planning on going for an elf based operating system. What about the mips port made you decide that you wanted to use that as a guideline? -eric Firstly, there're some similar between them. Secondly, we're some familiar

glibc or newlib for mips-elf?

hi, Would you tell me which I should select to port for the new target? The new target is like mips-elf. But I was told that glibc doesn't support mips-elf well. Is it right? Thanks for your help. Eric

glibc or newlib for mips-elf?

Thanks for your suggestion. I think I need to port glibc. Because the new board is going to run linux kernel. But I'm still not sure if glibc will support the new target well. Thanks. Eric

porting gcc can't compile libgcc2.c

Hello, Here is a question about porting gcc. After I modified machine.md and other backend files, I can make cc1 and xgcc now. But libgcc2.o still failed. I'd like to know does we must make libgcc2.o since the target machine don't have float registers and 64bit registers. Thanks a lot. Eric