import different optimized versions of div funcs based upon target sparc arch

5 files changed, 85 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/sparc/sparcv9/rem.S b/libc/sysdeps/linux/sparc/sparcv9/rem.S
new file mode 100644
index 000000000..1474e32ae
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/sparcv9/rem.S
@@ -0,0 +1,20 @@
+/*
+ * Sparc v9 has divide.
+ * As divx takes 68 cycles and sdivcc only 36,
+ * we use sdivcc eventhough it is deprecated.
+ */
+
+	.text
+	.align		32
+ENTRY(.rem)
+
+	sra		%o0, 31, %o2
+	wr		%o2, 0, %y
+	sdivcc		%o0, %o1, %o2
+	xnor		%o2, %g0, %o3
+	movvs		%icc, %o3, %o2
+	smul		%o2, %o1, %o2
+	retl
+	 sub		%o0, %o2, %o0
+
+END(.rem)
diff --git a/libc/sysdeps/linux/sparc/sparcv9/sdiv.S b/libc/sysdeps/linux/sparc/sparcv9/sdiv.S
new file mode 100644
index 000000000..45535bb68
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/sparcv9/sdiv.S
@@ -0,0 +1,18 @@
+/*
+ * Sparc v9 has divide.
+ * As divx takes 68 cycles and sdivcc only 36,
+ * we use sdivcc eventhough it is deprecated.
+ */
+
+	.text
+	.align		32
+ENTRY(.div)
+
+	sra		%o0, 31, %o2
+	wr		%o2, 0, %y
+	sdivcc		%o0, %o1, %o0
+	xnor		%o0, %g0, %o2
+	retl
+	 movvs		%icc, %o2, %o0
+
+END(.div)
diff --git a/libc/sysdeps/linux/sparc/sparcv9/udiv.S b/libc/sysdeps/linux/sparc/sparcv9/udiv.S
new file mode 100644
index 000000000..303f29bdf
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/sparcv9/udiv.S
@@ -0,0 +1,15 @@
+/*
+ * Sparc v9 has divide.
+ * As divx takes 68 cycles and udiv only 37,
+ * we use udiv eventhough it is deprecated.
+ */
+
+	.text
+	.align		32
+ENTRY(.udiv)
+
+	wr		%g0, 0, %y
+	retl
+	 udiv		%o0, %o1, %o0
+
+END(.udiv)
diff --git a/libc/sysdeps/linux/sparc/sparcv9/umul.S b/libc/sysdeps/linux/sparc/sparcv9/umul.S
new file mode 100644
index 000000000..e65e4b95f
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/sparcv9/umul.S
@@ -0,0 +1,15 @@
+/*
+ * Sparc v9 has multiply.
+ */
+
+	.text
+	.align		32
+ENTRY(.umul)
+
+	srl		%o0, 0, %o0
+	srl		%o1, 0, %o1
+	mulx		%o0, %o1, %o0
+	retl
+	 srlx		%o0, 32, %o1
+
+END(.umul)
diff --git a/libc/sysdeps/linux/sparc/sparcv9/urem.S b/libc/sysdeps/linux/sparc/sparcv9/urem.S
new file mode 100644
index 000000000..93542698d
--- /dev/null
+++ b/libc/sysdeps/linux/sparc/sparcv9/urem.S
@@ -0,0 +1,17 @@
+/*
+ * Sparc v9 has divide.
+ * As divx takes 68 cycles and udiv only 37,
+ * we use udiv eventhough it is deprecated.
+ */
+
+	.text
+	.align		32
+ENTRY(.urem)
+
+	wr		%g0, 0, %y
+	udiv		%o0, %o1, %o2
+	umul		%o2, %o1, %o2
+	retl
+	 sub		%o0, %o2, %o0
+
+END(.urem)