patch-2.3.9 linux/arch/mips/kernel/r2300_fpu.S

• Lines: 224
• Date: Fri Jun 25 17:40:12 1999
• Orig file: v2.3.8/linux/arch/mips/kernel/r2300_fpu.S
• Orig date: Tue Oct 20 13:52:54 1998

diff -u --recursive --new-file v2.3.8/linux/arch/mips/kernel/r2300_fpu.S linux/arch/mips/kernel/r2300_fpu.S
@@ -1,16 +1,17 @@
-/*
+/* $Id: r2300_fpu.S,v 1.5 1999/05/01 22:40:36 ralf Exp $
  * r2300_fpu.S: Save/restore floating point context for signal handlers.
  *
  * This file is subject to the terms and conditions of the GNU General Public
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 1996 by Ralf Baechle
+ * Copyright (C) 1996, 1998 by Ralf Baechle
  *
  * Multi-arch abstraction and asm macros for easier reading:
  * Copyright (C) 1996 David S. Miller (dm@engr.sgi.com)
  *
- * $Id: r2300_fpu.S,v 1.3 1997/12/01 16:54:20 ralf Exp $
+ * Further modifications to make this work:
+ * Copyright (c) 1998 Harald Koerfgen
  */
 #include <asm/asm.h>
 #include <asm/fpregdef.h>
@@ -18,123 +19,101 @@
 #include <asm/offset.h>
 #include <asm/regdef.h>
 
-	.set	mips3
+#define EX(a,b)							\
+9:	a,##b;							\
+	.section __ex_table,"a";				\
+	PTR	9b,bad_stack;					\
+	.previous
+
 	.set	noreorder
+	.set	mips1
 	/* Save floating point context */
-	.align	5
-	LEAF(r2300_save_fp_context)
-	mfc0	t0,CP0_STATUS
-	sll	t0,t0,2
+LEAF(r2300_save_fp_context)
 
-	bgez	t0,1f
-	 nop
-
-	cfc1	t0,fcr31
-	/* Store the 32 single precision registers */
-	swc1	$f0,(SC_FPREGS+0)(a0)
-	swc1	$f1,(SC_FPREGS+8)(a0)
-	swc1	$f2,(SC_FPREGS+16)(a0)
-	swc1	$f3,(SC_FPREGS+24)(a0)
-	swc1	$f4,(SC_FPREGS+32)(a0)
-	swc1	$f5,(SC_FPREGS+40)(a0)
-	swc1	$f6,(SC_FPREGS+48)(a0)
-	swc1	$f7,(SC_FPREGS+56)(a0)
-	swc1	$f8,(SC_FPREGS+64)(a0)
-	swc1	$f9,(SC_FPREGS+72)(a0)
-	swc1	$f10,(SC_FPREGS+80)(a0)
-	swc1	$f11,(SC_FPREGS+88)(a0)
-	swc1	$f12,(SC_FPREGS+96)(a0)
-	swc1	$f13,(SC_FPREGS+104)(a0)
-	swc1	$f14,(SC_FPREGS+112)(a0)
-	swc1	$f15,(SC_FPREGS+120)(a0)
-	swc1	$f16,(SC_FPREGS+128)(a0)
-	swc1	$f17,(SC_FPREGS+136)(a0)
-	swc1	$f18,(SC_FPREGS+144)(a0)
-	swc1	$f19,(SC_FPREGS+152)(a0)
-	swc1	$f20,(SC_FPREGS+160)(a0)
-	swc1	$f21,(SC_FPREGS+168)(a0)
-	swc1	$f22,(SC_FPREGS+176)(a0)
-	swc1	$f23,(SC_FPREGS+184)(a0)
-	swc1	$f24,(SC_FPREGS+192)(a0)
-	swc1	$f25,(SC_FPREGS+200)(a0)
-	swc1	$f26,(SC_FPREGS+208)(a0)
-	swc1	$f27,(SC_FPREGS+216)(a0)
-	swc1	$f28,(SC_FPREGS+224)(a0)
-	swc1	$f29,(SC_FPREGS+232)(a0)
-	swc1	$f30,(SC_FPREGS+240)(a0)
-	swc1	$f31,(SC_FPREGS+248)(a0)
-	sw	t0,SC_FPC_CSR(a0)
+	cfc1	t1,fcr31
+	EX(swc1	$f0,(SC_FPREGS+0)(a0))
+	EX(swc1	$f1,(SC_FPREGS+8)(a0))
+	EX(swc1	$f2,(SC_FPREGS+16)(a0))
+	EX(swc1	$f3,(SC_FPREGS+24)(a0))
+	EX(swc1	$f4,(SC_FPREGS+32)(a0))
+	EX(swc1	$f5,(SC_FPREGS+40)(a0))
+	EX(swc1	$f6,(SC_FPREGS+48)(a0))
+	EX(swc1	$f7,(SC_FPREGS+56)(a0))
+	EX(swc1	$f8,(SC_FPREGS+64)(a0))
+	EX(swc1	$f9,(SC_FPREGS+72)(a0))
+	EX(swc1	$f10,(SC_FPREGS+80)(a0))
+	EX(swc1	$f11,(SC_FPREGS+88)(a0))
+	EX(swc1	$f12,(SC_FPREGS+96)(a0))
+	EX(swc1	$f13,(SC_FPREGS+104)(a0))
+	EX(swc1	$f14,(SC_FPREGS+112)(a0))
+	EX(swc1	$f15,(SC_FPREGS+120)(a0))
+	EX(swc1	$f16,(SC_FPREGS+128)(a0))
+	EX(swc1	$f17,(SC_FPREGS+136)(a0))
+	EX(swc1	$f18,(SC_FPREGS+144)(a0))
+	EX(swc1	$f19,(SC_FPREGS+152)(a0))
+	EX(swc1	$f20,(SC_FPREGS+160)(a0))
+	EX(swc1	$f21,(SC_FPREGS+168)(a0))
+	EX(swc1	$f22,(SC_FPREGS+176)(a0))
+	EX(swc1	$f23,(SC_FPREGS+184)(a0))
+	EX(swc1	$f24,(SC_FPREGS+192)(a0))
+	EX(swc1	$f25,(SC_FPREGS+200)(a0))
+	EX(swc1	$f26,(SC_FPREGS+208)(a0))
+	EX(swc1	$f27,(SC_FPREGS+216)(a0))
+	EX(swc1	$f28,(SC_FPREGS+224)(a0))
+	EX(swc1	$f29,(SC_FPREGS+232)(a0))
+	EX(swc1	$f30,(SC_FPREGS+240)(a0))
+	EX(swc1	$f31,(SC_FPREGS+248)(a0))
+	EX(sw	t1,SC_FPC_CSR(a0))
 	cfc1	t0,$0				# implementation/version
 	jr	ra
 	.set	nomacro
-	 sw	t0,SC_FPC_EIR(a0)
-	.set	macro
-1:
-	jr	ra
-	.set	nomacro
-	 nop
+	 EX(sw	t0,SC_FPC_EIR(a0))
 	.set	macro
 	END(r2300_save_fp_context)
 
 /*
- * Restore fpu state:
+ * Restore FPU state:
  *  - fp gp registers
  *  - cp1 status/control register
  *
- * We base the decission which registers to restore from the signal stack
+ * We base the decision which registers to restore from the signal stack
  * frame on the current content of c0_status, not on the content of the
  * stack frame which might have been changed by the user.
  */
-	LEAF(r2300_restore_fp_context)
-	mfc0	t0,CP0_STATUS
-	sll	t0,t0,2
-
-	bgez	t0,1f
-	 nop
-
-	 lw	t0,SC_FPC_CSR(a0)
-	/* Restore the 16 odd double precision registers only
-	 * when enabled in the cp0 status register.
-	 */
-	ldc1	$f0,(SC_FPREGS+0)(a0)
-	ldc1	$f1,(SC_FPREGS+8)(a0)
-	ldc1	$f2,(SC_FPREGS+16)(a0)
-	ldc1	$f3,(SC_FPREGS+24)(a0)
-	ldc1	$f4,(SC_FPREGS+32)(a0)
-	ldc1	$f5,(SC_FPREGS+40)(a0)
-	ldc1	$f6,(SC_FPREGS+48)(a0)
-	ldc1	$f7,(SC_FPREGS+56)(a0)
-	ldc1	$f8,(SC_FPREGS+64)(a0)
-	ldc1	$f9,(SC_FPREGS+72)(a0)
-	ldc1	$f10,(SC_FPREGS+80)(a0)
-	ldc1	$f11,(SC_FPREGS+88)(a0)
-	ldc1	$f12,(SC_FPREGS+96)(a0)
-	ldc1	$f13,(SC_FPREGS+104)(a0)
-	ldc1	$f14,(SC_FPREGS+112)(a0)
-	ldc1	$f15,(SC_FPREGS+120)(a0)
-	ldc1	$f16,(SC_FPREGS+128)(a0)
-	ldc1	$f17,(SC_FPREGS+136)(a0)
-	ldc1	$f18,(SC_FPREGS+144)(a0)
-	ldc1	$f19,(SC_FPREGS+152)(a0)
-	ldc1	$f20,(SC_FPREGS+160)(a0)
-	ldc1	$f21,(SC_FPREGS+168)(a0)
-	ldc1	$f22,(SC_FPREGS+176)(a0)
-	ldc1	$f23,(SC_FPREGS+184)(a0)
-	ldc1	$f24,(SC_FPREGS+192)(a0)
-	ldc1	$f25,(SC_FPREGS+200)(a0)
-	ldc1	$f26,(SC_FPREGS+208)(a0)
-	ldc1	$f27,(SC_FPREGS+216)(a0)
-	ldc1	$f28,(SC_FPREGS+224)(a0)
-	ldc1	$f29,(SC_FPREGS+232)(a0)
-	ldc1	$f30,(SC_FPREGS+240)(a0)
-	ldc1	$f31,(SC_FPREGS+248)(a0)
+LEAF(r2300_restore_fp_context)
+	EX(lw t0,SC_FPC_CSR(a0))
+	EX(lwc1	$f0,(SC_FPREGS+0)(a0))
+	EX(lwc1	$f1,(SC_FPREGS+8)(a0))
+	EX(lwc1	$f2,(SC_FPREGS+16)(a0))
+	EX(lwc1	$f3,(SC_FPREGS+24)(a0))
+	EX(lwc1	$f4,(SC_FPREGS+32)(a0))
+	EX(lwc1	$f5,(SC_FPREGS+40)(a0))
+	EX(lwc1	$f6,(SC_FPREGS+48)(a0))
+	EX(lwc1	$f7,(SC_FPREGS+56)(a0))
+	EX(lwc1	$f8,(SC_FPREGS+64)(a0))
+	EX(lwc1	$f9,(SC_FPREGS+72)(a0))
+	EX(lwc1	$f10,(SC_FPREGS+80)(a0))
+	EX(lwc1	$f11,(SC_FPREGS+88)(a0))
+	EX(lwc1	$f12,(SC_FPREGS+96)(a0))
+	EX(lwc1	$f13,(SC_FPREGS+104)(a0))
+	EX(lwc1	$f14,(SC_FPREGS+112)(a0))
+	EX(lwc1	$f15,(SC_FPREGS+120)(a0))
+	EX(lwc1	$f16,(SC_FPREGS+128)(a0))
+	EX(lwc1	$f17,(SC_FPREGS+136)(a0))
+	EX(lwc1	$f18,(SC_FPREGS+144)(a0))
+	EX(lwc1	$f19,(SC_FPREGS+152)(a0))
+	EX(lwc1	$f20,(SC_FPREGS+160)(a0))
+	EX(lwc1	$f21,(SC_FPREGS+168)(a0))
+	EX(lwc1	$f22,(SC_FPREGS+176)(a0))
+	EX(lwc1	$f23,(SC_FPREGS+184)(a0))
+	EX(lwc1	$f24,(SC_FPREGS+192)(a0))
+	EX(lwc1	$f25,(SC_FPREGS+200)(a0))
+	EX(lwc1	$f26,(SC_FPREGS+208)(a0))
+	EX(lwc1	$f27,(SC_FPREGS+216)(a0))
+	EX(lwc1	$f28,(SC_FPREGS+224)(a0))
+	EX(lwc1	$f29,(SC_FPREGS+232)(a0))
+	EX(lwc1	$f30,(SC_FPREGS+240)(a0))
+	EX(lwc1	$f31,(SC_FPREGS+248)(a0))
 	jr	ra
-	.set	nomacro
 	 ctc1	t0,fcr31
-	.set	macro
-1:
-	jr	ra
-	.set	nomacro
-	 nop
-	.set	macro
 	END(r2300_restore_fp_context)