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authorRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
committerRoland McGrath <roland@gnu.org>1995-02-18 01:27:10 +0000
commit28f540f45bbacd939bfd07f213bcad2bf730b1bf (patch)
tree15f07c4c43d635959c6afee96bde71fb1b3614ee /sysdeps/alpha/divrem.m4
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diff --git a/sysdeps/alpha/divrem.m4 b/sysdeps/alpha/divrem.m4
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+/* For each N divided by D, we do:
+      result = (double) N / (double) D
+   Then, for each N mod D, we do:
+      result = N - (D * divMODE (N, D))
+
+   FIXME:
+   The q and qu versions won't deal with operands > 50 bits.  We also
+   don't check for divide by zero.  */
+
+#include "DEFS.h"
+#if 0
+/* We do not handle div by zero yet.  */
+#include <machine/pal.h>
+#endif
+#include <sysdep.h>
+
+define(path, `SYSDEP_DIR/macros.m4')dnl
+include(path)
+
+FUNC__(OP)
+	/* First set up the dividend.  */
+	EXTEND(t10)
+	stq t10,0(sp)
+	ldt $f10,0(sp)
+	cvtqt $f10,$f10
+	ADJQU($f10)
+
+	/* Then set up the divisor.  */
+	EXTEND(t11)
+	stq t11,0(sp)
+	ldt $f1,0(sp)
+	cvtqt $f1,$f1
+	ADJQU($f1)
+
+	/* Do the division.  */
+	divt $f10,$f1,$f10
+	cvttqc $f10,$f10
+
+	/* Put the result in t12.  */
+	stt $f10,0(sp)
+	ldq t12,0(sp)
+	FULLEXTEND(t12)
+
+	DOREM
+
+	lda sp,16(sp)
+	ret zero,(t9),1
+	.end NAME__(OP)