1 files changed, 131 insertions, 0 deletions
diff --git a/arch/sparc64/lib/VISsave.S b/arch/sparc64/lib/VISsave.S
new file mode 100644
index 000000000000..65e328d600a8
--- /dev/null
+++ b/arch/sparc64/lib/VISsave.S
@@ -0,0 +1,131 @@
+/* $Id: VISsave.S,v 1.6 2002/02/09 19:49:30 davem Exp $
+ * VISsave.S: Code for saving FPU register state for
+ *            VIS routines. One should not call this directly,
+ *            but use macros provided in <asm/visasm.h>.
+ *
+ * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+
+#include <asm/asi.h>
+#include <asm/page.h>
+#include <asm/ptrace.h>
+#include <asm/visasm.h>
+#include <asm/thread_info.h>
+
+	.text
+	.globl		VISenter, VISenterhalf
+
+	/* On entry: %o5=current FPRS value, %g7 is callers address */
+	/* May clobber %o5, %g1, %g2, %g3, %g7, %icc, %xcc */
+
+	/* Nothing special need be done here to handle pre-emption, this
+	 * FPU save/restore mechanism is already preemption safe.
+	 */
+
+	.align		32
+VISenter:
+	ldub		[%g6 + TI_FPDEPTH], %g1
+	brnz,a,pn	%g1, 1f
+	 cmp		%g1, 1
+	stb		%g0, [%g6 + TI_FPSAVED]
+	stx		%fsr, [%g6 + TI_XFSR]
+9:	jmpl		%g7 + %g0, %g0
+	 nop
+1:	bne,pn		%icc, 2f
+
+	 srl		%g1, 1, %g1
+vis1:	ldub		[%g6 + TI_FPSAVED], %g3
+	stx		%fsr, [%g6 + TI_XFSR]
+	or		%g3, %o5, %g3
+	stb		%g3, [%g6 + TI_FPSAVED]
+	rd		%gsr, %g3
+	clr		%g1
+	ba,pt		%xcc, 3f
+
+	 stx		%g3, [%g6 + TI_GSR]
+2:	add		%g6, %g1, %g3
+	cmp		%o5, FPRS_DU
+	be,pn		%icc, 6f
+	 sll		%g1, 3, %g1
+	stb		%o5, [%g3 + TI_FPSAVED]
+	rd		%gsr, %g2
+	add		%g6, %g1, %g3
+	stx		%g2, [%g3 + TI_GSR]
+
+	add		%g6, %g1, %g2
+	stx		%fsr, [%g2 + TI_XFSR]
+	sll		%g1, 5, %g1
+3:	andcc		%o5, FPRS_DL|FPRS_DU, %g0
+	be,pn		%icc, 9b
+	 add		%g6, TI_FPREGS, %g2
+	andcc		%o5, FPRS_DL, %g0
+	membar		#StoreStore | #LoadStore
+
+	be,pn		%icc, 4f
+	 add		%g6, TI_FPREGS+0x40, %g3
+	stda		%f0, [%g2 + %g1] ASI_BLK_P
+	stda		%f16, [%g3 + %g1] ASI_BLK_P
+	andcc		%o5, FPRS_DU, %g0
+	be,pn		%icc, 5f
+4:	 add		%g1, 128, %g1
+	stda		%f32, [%g2 + %g1] ASI_BLK_P
+
+	stda		%f48, [%g3 + %g1] ASI_BLK_P
+5:	membar		#Sync
+	jmpl		%g7 + %g0, %g0
+	 nop
+
+6:	ldub		[%g3 + TI_FPSAVED], %o5
+	or		%o5, FPRS_DU, %o5
+	add		%g6, TI_FPREGS+0x80, %g2
+	stb		%o5, [%g3 + TI_FPSAVED]
+
+	sll		%g1, 5, %g1
+	add		%g6, TI_FPREGS+0xc0, %g3
+	wr		%g0, FPRS_FEF, %fprs
+	membar		#StoreStore | #LoadStore
+	stda		%f32, [%g2 + %g1] ASI_BLK_P
+	stda		%f48, [%g3 + %g1] ASI_BLK_P
+	membar		#Sync
+	jmpl		%g7 + %g0, %g0
+
+	 nop
+
+	.align		32
+VISenterhalf:
+	ldub		[%g6 + TI_FPDEPTH], %g1
+	brnz,a,pn	%g1, 1f
+	 cmp		%g1, 1
+	stb		%g0, [%g6 + TI_FPSAVED]
+	stx		%fsr, [%g6 + TI_XFSR]
+	clr		%o5
+	jmpl		%g7 + %g0, %g0
+	 wr		%g0, FPRS_FEF, %fprs
+
+1:	bne,pn		%icc, 2f
+	 srl		%g1, 1, %g1
+	ba,pt		%xcc, vis1
+	 sub		%g7, 8, %g7
+2:	addcc		%g6, %g1, %g3
+	sll		%g1, 3, %g1
+	andn		%o5, FPRS_DU, %g2
+	stb		%g2, [%g3 + TI_FPSAVED]
+
+	rd		%gsr, %g2
+	add		%g6, %g1, %g3
+	stx		%g2, [%g3 + TI_GSR]
+	add		%g6, %g1, %g2
+	stx		%fsr, [%g2 + TI_XFSR]
+	sll		%g1, 5, %g1
+3:	andcc		%o5, FPRS_DL, %g0
+	be,pn		%icc, 4f
+	 add		%g6, TI_FPREGS, %g2
+
+	membar		#StoreStore | #LoadStore
+	add		%g6, TI_FPREGS+0x40, %g3
+	stda		%f0, [%g2 + %g1] ASI_BLK_P
+	stda		%f16, [%g3 + %g1] ASI_BLK_P
+	membar		#Sync
+4:	and		%o5, FPRS_DU, %o5
+	jmpl		%g7 + %g0, %g0
+	 wr		%o5, FPRS_FEF, %fprs