Re: [Xenomai-core] [PATCH] merge powerpc fpu.S and fpu_64.S

[Philippe Gerum <rpm@xenomai.org>]

Heikki Lindholm wrote:
> Currently the two powerpc fpu*.S assembly sections are so similar that 
> there's really no need for two of them. Merge them into a common fpu.S. 
> Tested on a G5.

Queued for -rc3. Thanks.

> 
> -- Heikki Lindholm
> 
> 
> ------------------------------------------------------------------------
> 
> diff -Nru xenomai/ksrc/arch/powerpc/fpu.S xenomai-devel/ksrc/arch/powerpc/fpu.S
> --- xenomai/ksrc/arch/powerpc/fpu.S	2005-11-18 20:55:24.000000000 +0200
> +++ xenomai-devel/ksrc/arch/powerpc/fpu.S	2006-01-13 12:35:49.000000000 +0200
> @@ -19,9 +19,24 @@
>  
>  #include <linux/config.h> 
>  #include <asm/processor.h>
> -#include <asm/cputable.h>
>  #include <asm/ppc_asm.h>
>  
> +#ifdef CONFIG_PPC601_SYNC_FIX
> +#define SYNC				\
> +BEGIN_FTR_SECTION			\
> +	sync;				\
> +	isync;				\
> +END_FTR_SECTION_IFSET(CPU_FTR_601)
> +#else /* !CONFIG_PPC601_SYNC_FIX */
> +#define	SYNC
> +#endif /* CONFIG_PPC601_SYNC_FIX */
> +
> +#if defined(CONFIG_PPC64) || defined(CONFIG_PPC64BRIDGE)
> +#define MTMSRD(r)	.long	(0x7c000164 + ((r) << 21))	/* mtmsrd */
> +#else
> +#define MTMSRD(r)	mtmsr	r
> +#endif /* CONFIG_PPC64 || CONFIG_PPC64BRIDGE */
> +
>  #define RTHAL_FPSAVE(n, base)	stfd n,8*(n)(base)
>  #define RTHAL_FPSAVE2(n, base)	RTHAL_FPSAVE(n, base); RTHAL_FPSAVE(n+1, base)
>  #define RTHAL_FPSAVE4(n, base)	RTHAL_FPSAVE2(n, base); RTHAL_FPSAVE2(n+2, base)
> diff -Nru xenomai/ksrc/arch/powerpc/fpu_64.S xenomai-devel/ksrc/arch/powerpc/fpu_64.S
> --- xenomai/ksrc/arch/powerpc/fpu_64.S	2005-11-18 20:55:24.000000000 +0200
> +++ xenomai-devel/ksrc/arch/powerpc/fpu_64.S	1970-01-01 02:00:00.000000000 +0200
> @@ -1,71 +0,0 @@
> -/*
> - * Copyright (C) 2001,2002,2003,2004 Philippe Gerum.
> - *
> - * 64-bit PowerPC adoption
> - *   copyright (C) 2005 Taneli Vähäkangas and Heikki Lindholm
> - *
> - * This program is free software; you can redistribute it and/or modify
> - * it under the terms of the GNU General Public License as published by
> - * the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
> - * USA; either version 2 of the License, or (at your option) any later
> - * version.
> - *
> - * This program is distributed in the hope that it will be useful,
> - * but WITHOUT ANY WARRANTY; without even the implied warranty of
> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> - * GNU General Public License for more details.
> - *
> - * You should have received a copy of the GNU General Public License
> - * along with this program; if not, write to the Free Software
> - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
> - */
> -
> -#include <linux/config.h> 
> -#include <asm/processor.h>
> -#include <asm/ppc_asm.h>
> -
> -#define RTHAL_FPSAVE(n, base)	stfd n,8*(n)(base)
> -#define RTHAL_FPSAVE2(n, base)	RTHAL_FPSAVE(n, base); RTHAL_FPSAVE(n+1, base)
> -#define RTHAL_FPSAVE4(n, base)	RTHAL_FPSAVE2(n, base); RTHAL_FPSAVE2(n+2, base)
> -#define RTHAL_FPSAVE8(n, base)	RTHAL_FPSAVE4(n, base); RTHAL_FPSAVE4(n+4, base)
> -#define RTHAL_FPSAVE16(n, base)	RTHAL_FPSAVE8(n, base); RTHAL_FPSAVE8(n+8, base)
> -#define RTHAL_FPSAVE32(n, base)	RTHAL_FPSAVE16(n, base); RTHAL_FPSAVE16(n+16, base)
> -
> -/* r3 = &tcb->fpuenv */
> -_GLOBAL(rthal_save_fpu)
> -	mfmsr	r5
> -	ori	r5,r5,MSR_FP		/* Re-enable use of FPU. */
> -	mtmsrd	r5			/* Enable use of fpu. */
> -	isync
> -	RTHAL_FPSAVE32(0,r3)
> -	mffs	fr0
> -	stfd	fr0,8*32(r3)
> -	blr
> -
> -#define RTHAL_FPLOAD(n, base)	lfd n,8*(n)(base)
> -#define RTHAL_FPLOAD2(n, base)	RTHAL_FPLOAD(n, base); RTHAL_FPLOAD(n+1, base)
> -#define RTHAL_FPLOAD4(n, base)	RTHAL_FPLOAD2(n, base); RTHAL_FPLOAD2(n+2, base)
> -#define RTHAL_FPLOAD8(n, base)	RTHAL_FPLOAD4(n, base); RTHAL_FPLOAD4(n+4, base)
> -#define RTHAL_FPLOAD16(n, base)	RTHAL_FPLOAD8(n, base); RTHAL_FPLOAD8(n+8, base)
> -#define RTHAL_FPLOAD32(n, base)	RTHAL_FPLOAD16(n, base); RTHAL_FPLOAD16(n+16, base)
> -
> -/* r3 = &tcb->fpuenv */
> -_GLOBAL(rthal_init_fpu)
> -	mfmsr	r5
> -	ori	r5,r5,MSR_FP|MSR_FE1	/* RT kernel threads always operate in */
> -	li	r4,MSR_FE0		/* imprecise non-recoverable exception mode. */
> -	andc	r5,r5,r4
> -	mtmsrd	r5
> -
> -	/* Fallback wanted. */
> -	
> -/* r3 = &tcb->fpuenv */
> -_GLOBAL(rthal_restore_fpu)
> -	mfmsr	r5
> -	ori	r5,r5,MSR_FP		/* Re-enable use of FPU. */
> -	mtmsrd	r5			/* Enable use of fpu. */
> -	isync
> -	lfd	fr0,8*32(r3)
> -	mtfsf	0xff,0
> -	RTHAL_FPLOAD32(0,r3)
> -	blr
> diff -Nru xenomai/ksrc/arch/powerpc/Makefile xenomai-devel/ksrc/arch/powerpc/Makefile
> --- xenomai/ksrc/arch/powerpc/Makefile	2006-01-12 15:25:59.000000000 +0200
> +++ xenomai-devel/ksrc/arch/powerpc/Makefile	2006-01-13 12:23:00.000000000 +0200
> @@ -5,13 +5,12 @@
>  obj-$(CONFIG_XENOMAI) += xeno_hal.o
>  
>  xeno_hal-y := hal.o
> +xeno_hal-$(CONFIG_XENO_HW_FPU) += fpu.o
>  
>  ifeq ($(CONFIG_PPC64),y)
>  xeno_hal-$(CONFIG_PPC64) += switch_64.o
> -xeno_hal-$(CONFIG_XENO_HW_FPU) += fpu_64.o
>  else
>  xeno_hal-$(CONFIG_PPC) += switch.o
> -xeno_hal-$(CONFIG_XENO_HW_FPU) += fpu.o
>  endif
>  
>  else
> @@ -23,13 +22,12 @@
>  O_TARGET := built-in.o
>  
>  obj-y := hal.o
> +obj-$(CONFIG_XENO_HW_FPU) += fpu.o
>  
>  ifeq ($(CONFIG_PPC64),y)
>  obj-y += switch_64.o
> -obj-$(CONFIG_XENO_HW_FPU) += fpu_64.o
>  else
>  obj-y += switch.o
> -obj-$(CONFIG_XENO_HW_FPU) += fpu.o
>  endif
>  
>  export-objs := hal.o
> 
> 
> ------------------------------------------------------------------------
> 
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-- 

Philippe.