summaryrefslogtreecommitdiffstats
path: root/arch/hexagon/mm/copy_user_template.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/hexagon/mm/copy_user_template.S')
-rw-r--r--arch/hexagon/mm/copy_user_template.S172
1 files changed, 172 insertions, 0 deletions
diff --git a/arch/hexagon/mm/copy_user_template.S b/arch/hexagon/mm/copy_user_template.S
new file mode 100644
index 000000000..d297df01b
--- /dev/null
+++ b/arch/hexagon/mm/copy_user_template.S
@@ -0,0 +1,172 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2010-2011, The Linux Foundation. All rights reserved.
+ */
+
+/* Numerology:
+ * WXYZ
+ * W: width in bytes
+ * X: Load=0, Store=1
+ * Y: Location 0=preamble,8=loop,9=epilog
+ * Z: Location=0,handler=9
+ */
+ .text
+ .global FUNCNAME
+ .type FUNCNAME, @function
+ .p2align 5
+FUNCNAME:
+ {
+ p0 = cmp.gtu(bytes,#0)
+ if (!p0.new) jump:nt .Ldone
+ r3 = or(dst,src)
+ r4 = xor(dst,src)
+ }
+ {
+ p1 = cmp.gtu(bytes,#15)
+ p0 = bitsclr(r3,#7)
+ if (!p0.new) jump:nt .Loop_not_aligned_8
+ src_dst_sav = combine(src,dst)
+ }
+
+ {
+ loopcount = lsr(bytes,#3)
+ if (!p1) jump .Lsmall
+ }
+ p3=sp1loop0(.Loop8,loopcount)
+.Loop8:
+8080:
+8180:
+ {
+ if (p3) memd(dst++#8) = d_dbuf
+ d_dbuf = memd(src++#8)
+ }:endloop0
+8190:
+ {
+ memd(dst++#8) = d_dbuf
+ bytes -= asl(loopcount,#3)
+ jump .Lsmall
+ }
+
+.Loop_not_aligned_8:
+ {
+ p0 = bitsclr(r4,#7)
+ if (p0.new) jump:nt .Lalign
+ }
+ {
+ p0 = bitsclr(r3,#3)
+ if (!p0.new) jump:nt .Loop_not_aligned_4
+ p1 = cmp.gtu(bytes,#7)
+ }
+
+ {
+ if (!p1) jump .Lsmall
+ loopcount = lsr(bytes,#2)
+ }
+ p3=sp1loop0(.Loop4,loopcount)
+.Loop4:
+4080:
+4180:
+ {
+ if (p3) memw(dst++#4) = w_dbuf
+ w_dbuf = memw(src++#4)
+ }:endloop0
+4190:
+ {
+ memw(dst++#4) = w_dbuf
+ bytes -= asl(loopcount,#2)
+ jump .Lsmall
+ }
+
+.Loop_not_aligned_4:
+ {
+ p0 = bitsclr(r3,#1)
+ if (!p0.new) jump:nt .Loop_not_aligned
+ p1 = cmp.gtu(bytes,#3)
+ }
+
+ {
+ if (!p1) jump .Lsmall
+ loopcount = lsr(bytes,#1)
+ }
+ p3=sp1loop0(.Loop2,loopcount)
+.Loop2:
+2080:
+2180:
+ {
+ if (p3) memh(dst++#2) = w_dbuf
+ w_dbuf = memuh(src++#2)
+ }:endloop0
+2190:
+ {
+ memh(dst++#2) = w_dbuf
+ bytes -= asl(loopcount,#1)
+ jump .Lsmall
+ }
+
+.Loop_not_aligned: /* Works for as small as one byte */
+ p3=sp1loop0(.Loop1,bytes)
+.Loop1:
+1080:
+1180:
+ {
+ if (p3) memb(dst++#1) = w_dbuf
+ w_dbuf = memub(src++#1)
+ }:endloop0
+ /* Done */
+1190:
+ {
+ memb(dst) = w_dbuf
+ jumpr r31
+ r0 = #0
+ }
+
+.Lsmall:
+ {
+ p0 = cmp.gtu(bytes,#0)
+ if (p0.new) jump:nt .Loop_not_aligned
+ }
+.Ldone:
+ {
+ r0 = #0
+ jumpr r31
+ }
+ .falign
+.Lalign:
+1000:
+ {
+ if (p0.new) w_dbuf = memub(src)
+ p0 = tstbit(src,#0)
+ if (!p1) jump .Lsmall
+ }
+1100:
+ {
+ if (p0) memb(dst++#1) = w_dbuf
+ if (p0) bytes = add(bytes,#-1)
+ if (p0) src = add(src,#1)
+ }
+2000:
+ {
+ if (p0.new) w_dbuf = memuh(src)
+ p0 = tstbit(src,#1)
+ if (!p1) jump .Lsmall
+ }
+2100:
+ {
+ if (p0) memh(dst++#2) = w_dbuf
+ if (p0) bytes = add(bytes,#-2)
+ if (p0) src = add(src,#2)
+ }
+4000:
+ {
+ if (p0.new) w_dbuf = memw(src)
+ p0 = tstbit(src,#2)
+ if (!p1) jump .Lsmall
+ }
+4100:
+ {
+ if (p0) memw(dst++#4) = w_dbuf
+ if (p0) bytes = add(bytes,#-4)
+ if (p0) src = add(src,#4)
+ jump FUNCNAME
+ }
+ .size FUNCNAME,.-FUNCNAME