patch-2.3.4 linux/arch/sparc/math-emu/sfp-util.h

• Lines: 116
• Date: Sat May 29 11:09:04 1999
• Orig file: v2.3.3/linux/arch/sparc/math-emu/sfp-util.h
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.3.3/linux/arch/sparc/math-emu/sfp-util.h linux/arch/sparc/math-emu/sfp-util.h
@@ -0,0 +1,115 @@
+#include <linux/kernel.h>
+#include <linux/sched.h>
+#include <linux/types.h>
+#include <asm/byteorder.h>
+
+#define add_ssaaaa(sh, sl, ah, al, bh, bl) 				\
+  __asm__ ("addcc %r4,%5,%1
+	addx %r2,%3,%0"							\
+	   : "=r" ((USItype)(sh)),					\
+	     "=&r" ((USItype)(sl))					\
+	   : "%rJ" ((USItype)(ah)),					\
+	     "rI" ((USItype)(bh)),					\
+	     "%rJ" ((USItype)(al)),					\
+	     "rI" ((USItype)(bl))					\
+	   : "cc")
+#define sub_ddmmss(sh, sl, ah, al, bh, bl) 				\
+  __asm__ ("subcc %r4,%5,%1
+	subx %r2,%3,%0"							\
+	   : "=r" ((USItype)(sh)),					\
+	     "=&r" ((USItype)(sl))					\
+	   : "rJ" ((USItype)(ah)),					\
+	     "rI" ((USItype)(bh)),					\
+	     "rJ" ((USItype)(al)),					\
+	     "rI" ((USItype)(bl))					\
+	   : "cc")
+
+#define umul_ppmm(w1, w0, u, v) \
+  __asm__ ("! Inlined umul_ppmm
+	wr	%%g0,%2,%%y	! SPARC has 0-3 delay insn after a wr
+	sra	%3,31,%%g2	! Don't move this insn
+	and	%2,%%g2,%%g2	! Don't move this insn
+	andcc	%%g0,0,%%g1	! Don't move this insn
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,%3,%%g1
+	mulscc	%%g1,0,%%g1
+	add	%%g1,%%g2,%0
+	rd	%%y,%1"							\
+	   : "=r" ((USItype)(w1)),					\
+	     "=r" ((USItype)(w0))					\
+	   : "%rI" ((USItype)(u)),					\
+	     "r" ((USItype)(v))						\
+	   : "%g1", "%g2", "cc")
+
+/* It's quite necessary to add this much assembler for the sparc.
+   The default udiv_qrnnd (in C) is more than 10 times slower!  */
+#define udiv_qrnnd(q, r, n1, n0, d) \
+  __asm__ ("! Inlined udiv_qrnnd
+	mov	32,%%g1
+	subcc	%1,%2,%%g0
+1:	bcs	5f
+	 addxcc %0,%0,%0	! shift n1n0 and a q-bit in lsb
+	sub	%1,%2,%1	! this kills msb of n
+	addx	%1,%1,%1	! so this can't give carry
+	subcc	%%g1,1,%%g1
+2:	bne	1b
+	 subcc	%1,%2,%%g0
+	bcs	3f
+	 addxcc %0,%0,%0	! shift n1n0 and a q-bit in lsb
+	b	3f
+	 sub	%1,%2,%1	! this kills msb of n
+4:	sub	%1,%2,%1
+5:	addxcc	%1,%1,%1
+	bcc	2b
+	 subcc	%%g1,1,%%g1
+! Got carry from n.  Subtract next step to cancel this carry.
+	bne	4b
+	 addcc	%0,%0,%0	! shift n1n0 and a 0-bit in lsb
+	sub	%1,%2,%1
+3:	xnor	%0,0,%0
+	! End of inline udiv_qrnnd"					\
+	   : "=&r" ((USItype)(q)),					\
+	     "=&r" ((USItype)(r))					\
+	   : "r" ((USItype)(d)),					\
+	     "1" ((USItype)(n1)),					\
+	     "0" ((USItype)(n0)) : "%g1", "cc")
+#define UDIV_NEEDS_NORMALIZATION 0
+
+#define abort()								\
+	return 0
+
+#ifdef __BIG_ENDIAN
+#define __BYTE_ORDER __BIG_ENDIAN
+#else
+#define __BYTE_ORDER __LITTLE_ENDIAN
+#endif