diff options
Diffstat (limited to 'arch/hexagon/mm/copy_user_template.S')
-rw-r--r-- | arch/hexagon/mm/copy_user_template.S | 172 |
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 0000000000..d297df01b4 --- /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 |