* GCC ASM(): Urgent!
@ 2000-02-29 18:10 YZ Dai
2000-03-01 0:59 ` Martin v. Loewis
` (2 more replies)
0 siblings, 3 replies; 6+ messages in thread
From: YZ Dai @ 2000-02-29 18:10 UTC (permalink / raw)
To: help-gcc
Hi,
I'm using GNU CC, ccmips or asmips. I see within the generated .s file
from .c file there are:
jpeg_idct_ifast:
.frame $fp,368,$31 # vars= 360, regs= 1/0, args= 0, extra= 0
.mask 0x40000000,-8
.fmask 0x00000000,0
1. What does .frame,.mask and .fmask means?
2. Which registers are protected? Which registers I can use in my ASM()
routine?
3. How to support Mips R3900 instruction like MULT rd,rs,rt?
4. In GCC book within a macro "\" gives operator value, but the example
gives compile error:
.macro mname rd
.word \ rd
.endm
5. How to debug and trace in the asm() instructions in a .C file?
Many thanks!
YZ DAI
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: GCC ASM(): Urgent!
2000-02-29 18:10 GCC ASM(): Urgent! YZ Dai
@ 2000-03-01 0:59 ` Martin v. Loewis
2000-04-01 0:00 ` Martin v. Loewis
2000-03-01 11:34 ` Alexandre Oliva
2000-04-01 0:00 ` YZ Dai
2 siblings, 1 reply; 6+ messages in thread
From: Martin v. Loewis @ 2000-03-01 0:59 UTC (permalink / raw)
To: yz; +Cc: help-gcc
> 1. What does .frame,.mask and .fmask means?
I don't know anything about MIPS assembly, but looking at
config/mips/mips.c, it appears that
.frame defines how the stack frame is organized, with the parameters
<register holding the frame pointer>, <size of the frame pointer>
<register holding the return value>
.mask and .fmask describe what registers are saved:
.mask <mask of gp registers saved>,<offset from vfp to store gp registers>
.fmask <mask of saved fp registers>,<offset from vfp to store fp registers>
> 2. Which registers are protected? Which registers I can use in my ASM()
> routine?
I can't answer this question.
> 3. How to support Mips R3900 instruction like MULT rd,rs,rt?
According to mips.h and mips.md, this is generated when
/* Generate three-operand multiply instructions for both SImode and DImode. */
#define GENERATE_MULT3 (TARGET_MIPS3900 \
&& !TARGET_MIPS16)
So it should be should be used if not on a 16bit target.
> 4. In GCC book within a macro "\" gives operator value, but the example
> gives compile error:
> .macro mname rd
> .word \ rd
> .endm
Again, I don't know.
> 5. How to debug and trace in the asm() instructions in a .C file?
What exactly do you mean by trace? Please use the option --save-temps;
this will produce a .s file, which contains the generated assembler
code for inspection.
Hope this helps,
Martin
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: GCC ASM(): Urgent!
2000-03-01 0:59 ` Martin v. Loewis
@ 2000-04-01 0:00 ` Martin v. Loewis
0 siblings, 0 replies; 6+ messages in thread
From: Martin v. Loewis @ 2000-04-01 0:00 UTC (permalink / raw)
To: yz; +Cc: help-gcc
> 1. What does .frame,.mask and .fmask means?
I don't know anything about MIPS assembly, but looking at
config/mips/mips.c, it appears that
.frame defines how the stack frame is organized, with the parameters
<register holding the frame pointer>, <size of the frame pointer>
<register holding the return value>
.mask and .fmask describe what registers are saved:
.mask <mask of gp registers saved>,<offset from vfp to store gp registers>
.fmask <mask of saved fp registers>,<offset from vfp to store fp registers>
> 2. Which registers are protected? Which registers I can use in my ASM()
> routine?
I can't answer this question.
> 3. How to support Mips R3900 instruction like MULT rd,rs,rt?
According to mips.h and mips.md, this is generated when
/* Generate three-operand multiply instructions for both SImode and DImode. */
#define GENERATE_MULT3 (TARGET_MIPS3900 \
&& !TARGET_MIPS16)
So it should be should be used if not on a 16bit target.
> 4. In GCC book within a macro "\" gives operator value, but the example
> gives compile error:
> .macro mname rd
> .word \ rd
> .endm
Again, I don't know.
> 5. How to debug and trace in the asm() instructions in a .C file?
What exactly do you mean by trace? Please use the option --save-temps;
this will produce a .s file, which contains the generated assembler
code for inspection.
Hope this helps,
Martin
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: GCC ASM(): Urgent!
2000-02-29 18:10 GCC ASM(): Urgent! YZ Dai
2000-03-01 0:59 ` Martin v. Loewis
@ 2000-03-01 11:34 ` Alexandre Oliva
2000-04-01 0:00 ` Alexandre Oliva
2000-04-01 0:00 ` YZ Dai
2 siblings, 1 reply; 6+ messages in thread
From: Alexandre Oliva @ 2000-03-01 11:34 UTC (permalink / raw)
To: YZ Dai; +Cc: help-gcc
[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
[-- Attachment #1: Type: text/plain, Size: 577 bytes --]
On Feb 29, 2000, YZ Dai <yz@mailhost.telecruz.com> wrote:
> 2. Which registers are protected? Which registers I can use in my ASM()
> routine?
You may want to take a look at the `Extended Asm' node of the GCC
manual. It explains how to pass data into and out of GCC asm
statements.
--
Alexandre Oliva http://www.ic.unicamp.br/~oliva/ Enjoy Guaraná
Cygnus Solutions, a Red Hat company aoliva@{redhat, cygnus}.com
Free Software Developer and Evangelist CS PhD student at IC-Unicamp
oliva@{lsd.ic.unicamp.br, gnu.org} Write to mailing lists, not to me
^ permalink raw reply [flat|nested] 6+ messages in thread* GCC ASM(): Urgent!
2000-02-29 18:10 GCC ASM(): Urgent! YZ Dai
2000-03-01 0:59 ` Martin v. Loewis
2000-03-01 11:34 ` Alexandre Oliva
@ 2000-04-01 0:00 ` YZ Dai
2 siblings, 0 replies; 6+ messages in thread
From: YZ Dai @ 2000-04-01 0:00 UTC (permalink / raw)
To: help-gcc
Hi,
I'm using GNU CC, ccmips or asmips. I see within the generated .s file
from .c file there are:
jpeg_idct_ifast:
.frame $fp,368,$31 # vars= 360, regs= 1/0, args= 0, extra= 0
.mask 0x40000000,-8
.fmask 0x00000000,0
1. What does .frame,.mask and .fmask means?
2. Which registers are protected? Which registers I can use in my ASM()
routine?
3. How to support Mips R3900 instruction like MULT rd,rs,rt?
4. In GCC book within a macro "\" gives operator value, but the example
gives compile error:
.macro mname rd
.word \ rd
.endm
5. How to debug and trace in the asm() instructions in a .C file?
Many thanks!
YZ DAI
^ permalink raw reply [flat|nested] 6+ messages in thread
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2000-02-29 18:10 GCC ASM(): Urgent! YZ Dai
2000-03-01 0:59 ` Martin v. Loewis
2000-04-01 0:00 ` Martin v. Loewis
2000-03-01 11:34 ` Alexandre Oliva
2000-04-01 0:00 ` Alexandre Oliva
2000-04-01 0:00 ` YZ Dai
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