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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /include/asm-sparc64/visasm.h
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Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'include/asm-sparc64/visasm.h')
-rw-r--r--include/asm-sparc64/visasm.h63
1 files changed, 63 insertions, 0 deletions
diff --git a/include/asm-sparc64/visasm.h b/include/asm-sparc64/visasm.h
new file mode 100644
index 000000000000..a74078551e0f
--- /dev/null
+++ b/include/asm-sparc64/visasm.h
@@ -0,0 +1,63 @@
+/* $Id: visasm.h,v 1.5 2001/04/24 01:09:12 davem Exp $ */
+#ifndef _SPARC64_VISASM_H
+#define _SPARC64_VISASM_H
+
+/* visasm.h: FPU saving macros for VIS routines
+ *
+ * Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
+ */
+
+#include <asm/pstate.h>
+#include <asm/ptrace.h>
+
+/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc */
+
+#define VISEntry \
+ rd %fprs, %o5; \
+ andcc %o5, (FPRS_FEF|FPRS_DU), %g0; \
+ be,pt %icc, 297f; \
+ sethi %hi(297f), %g7; \
+ sethi %hi(VISenter), %g1; \
+ jmpl %g1 + %lo(VISenter), %g0; \
+ or %g7, %lo(297f), %g7; \
+297: wr %g0, FPRS_FEF, %fprs; \
+
+#define VISExit \
+ wr %g0, 0, %fprs;
+
+/* Clobbers %o5, %g1, %g2, %g3, %g7, %icc, %xcc.
+ * Must preserve %o5 between VISEntryHalf and VISExitHalf */
+
+#define VISEntryHalf \
+ rd %fprs, %o5; \
+ andcc %o5, FPRS_FEF, %g0; \
+ be,pt %icc, 297f; \
+ sethi %hi(298f), %g7; \
+ sethi %hi(VISenterhalf), %g1; \
+ jmpl %g1 + %lo(VISenterhalf), %g0; \
+ or %g7, %lo(298f), %g7; \
+ clr %o5; \
+297: wr %o5, FPRS_FEF, %fprs; \
+298:
+
+#define VISExitHalf \
+ wr %o5, 0, %fprs;
+
+#ifndef __ASSEMBLY__
+static __inline__ void save_and_clear_fpu(void) {
+ __asm__ __volatile__ (
+" rd %%fprs, %%o5\n"
+" andcc %%o5, %0, %%g0\n"
+" be,pt %%icc, 299f\n"
+" sethi %%hi(298f), %%g7\n"
+" sethi %%hi(VISenter), %%g1\n"
+" jmpl %%g1 + %%lo(VISenter), %%g0\n"
+" or %%g7, %%lo(298f), %%g7\n"
+" 298: wr %%g0, 0, %%fprs\n"
+" 299:\n"
+" " : : "i" (FPRS_FEF|FPRS_DU) :
+ "o5", "g1", "g2", "g3", "g7", "cc");
+}
+#endif
+
+#endif /* _SPARC64_ASI_H */
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