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Licensing changes to GPLv3 resp. GPLv3 with GCC Runtime Exception.
[thirdparty/gcc.git] / gcc / config / picochip / libgccExtras / popcounthi2.asm
CommitLineData
358da97e
HS		 1// picoChip ASM file
2//.file "popcounthi2.S"
3//
4// Support for 16-bit population count.
5//
748086b7 6// Copyright (C) 2003, 2004, 2005, 2008, 2009 Free Software Foundation, Inc.
358da97e
HS		 7// Contributed by picoChip Designs Ltd.
8// Maintained by Daniel Towner (daniel.towner@picochip.com)
9//
10// This file is free software; you can redistribute it and/or modify it
11// under the terms of the GNU General Public License as published by the
748086b7 12// Free Software Foundation; either version 3, or (at your option) any
358da97e
HS		 13// later version.
14//
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HS		 15// This file is distributed in the hope that it will be useful, but
16// WITHOUT ANY WARRANTY; without even the implied warranty of
17// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18// General Public License for more details.
19//
748086b7
JJ		 20// Under Section 7 of GPL version 3, you are granted additional
21// permissions described in the GCC Runtime Library Exception, version
22// 3.1, as published by the Free Software Foundation.
23//
24// You should have received a copy of the GNU General Public License and
25// a copy of the GCC Runtime Library Exception along with this program;
26// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
27// <http://www.gnu.org/licenses/>.
358da97e
HS		 28
29.section .text
30
31// The following code (taken from a newsgroup posting) was compiled, and then
32// hand assembled (a similar version is given in the Hacker's Delight
33// book, chapter 5).
34//
35// int
36// popcount (int value)
37// {
38// value = ((value & 0xAAAA) >> 1) + (value & 0x5555);
39// value = ((value & 0xCCCC) >> 2) + (value & 0x3333);
40// value = ((value & 0xF0F0) >> 4) + (value & 0x0F0F);
41// return ((value & 0xFF00) >> 8) + (value & 0x00FF);
42// }
43//
44// This assembly function is approx. 20x faster than a naive loop
45// implementation of the population count, but about 30% bigger
46// (45 bytes v. 34 bytes).
47
48.align 8
49.global ___popcounthi2
50___popcounthi2:
51
52_picoMark_FUNCTION_BEGIN=
53
54// picoChip Function Prologue : &___popcounthi2 = 0 bytes
55
56 AND.0 [LSR R0,1],21845,R0 \ AND.1 R0,21845,R5
57 ADD.0 R0,R5,R0
58 AND.0 [LSR R0,2],13107,R0 \ AND.1 R0,13107,R5
59 ADD.0 R0,R5,R0 \ COPY.1 1807,R2
60 AND.0 [LSR R0,4],R2,R0 \ AND.1 R0,3855,R5
61 ADD.0 R0,R5,R0
62 JR (R12) \ AND.0 R0, 255, R5
63=-> ADD.0 [LSR R0,8],R5,R0
64
65_picoMark_FUNCTION_END=
66// picoChip Function Epilogue : ___popcounthi2
67//============================================================================
68// All DWARF information between this marker, and the END OF DWARF
69// marker should be included in the source file. Search for
70// FUNCTION_STACK_SIZE_GOES_HERE and FUNCTION NAME GOES HERE, and
71// provide the relevent information. Add markers called
72// _picoMark_FUNCTION_BEGIN and _picoMark_FUNCTION_END around the
73// function in question.
74//============================================================================
75
76//============================================================================
77// Frame information.
78//============================================================================
79
80.section .debug_frame
81_picoMark_DebugFrame=
82
83// Common CIE header.
84.unalignedInitLong _picoMark_CieEnd-_picoMark_CieBegin
85_picoMark_CieBegin=
86.unalignedInitLong 0xffffffff
87.initByte 0x1 // CIE Version
88.ascii 16#0# // CIE Augmentation
89.uleb128 0x1 // CIE Code Alignment Factor
90.sleb128 2 // CIE Data Alignment Factor
91.initByte 0xc // CIE RA Column
92.initByte 0xc // DW_CFA_def_cfa
93.uleb128 0xd
94.uleb128 0x0
95.align 2
96_picoMark_CieEnd=
97
98// FDE
99_picoMark_LSFDE0I900821033007563=
100.unalignedInitLong _picoMark_FdeEnd-_picoMark_FdeBegin
101_picoMark_FdeBegin=
102.unalignedInitLong _picoMark_DebugFrame // FDE CIE offset
103.unalignedInitWord _picoMark_FUNCTION_BEGIN // FDE initial location
104.unalignedInitWord _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
105.initByte 0xe // DW_CFA_def_cfa_offset
106.uleb128 0x0 // <-- FUNCTION_STACK_SIZE_GOES_HERE
107.initByte 0x4 // DW_CFA_advance_loc4
108.unalignedInitLong _picoMark_FUNCTION_END-_picoMark_FUNCTION_BEGIN
109.initByte 0xe // DW_CFA_def_cfa_offset
110.uleb128 0x0
111.align 2
112_picoMark_FdeEnd=
113
114//============================================================================
115// Abbrevation information.
116//============================================================================
117
118.section .debug_abbrev
119_picoMark_ABBREVIATIONS=
120
121.section .debug_abbrev
122 .uleb128 0x1 // (abbrev code)
123 .uleb128 0x11 // (TAG: DW_TAG_compile_unit)
124 .initByte 0x1 // DW_children_yes
125 .uleb128 0x10 // (DW_AT_stmt_list)
126 .uleb128 0x6 // (DW_FORM_data4)
127 .uleb128 0x12 // (DW_AT_high_pc)
128 .uleb128 0x1 // (DW_FORM_addr)
129 .uleb128 0x11 // (DW_AT_low_pc)
130 .uleb128 0x1 // (DW_FORM_addr)
131 .uleb128 0x25 // (DW_AT_producer)
132 .uleb128 0x8 // (DW_FORM_string)
133 .uleb128 0x13 // (DW_AT_language)
134 .uleb128 0x5 // (DW_FORM_data2)
135 .uleb128 0x3 // (DW_AT_name)
136 .uleb128 0x8 // (DW_FORM_string)
137.initByte 0x0
138.initByte 0x0
139
140 .uleb128 0x2 ;# (abbrev code)
141 .uleb128 0x2e ;# (TAG: DW_TAG_subprogram)
142.initByte 0x0 ;# DW_children_no
143 .uleb128 0x3 ;# (DW_AT_name)
144 .uleb128 0x8 ;# (DW_FORM_string)
145 .uleb128 0x11 ;# (DW_AT_low_pc)
146 .uleb128 0x1 ;# (DW_FORM_addr)
147 .uleb128 0x12 ;# (DW_AT_high_pc)
148 .uleb128 0x1 ;# (DW_FORM_addr)
149.initByte 0x0
150.initByte 0x0
151
152.initByte 0x0
153
154//============================================================================
155// Line information. DwarfLib requires this to be present, but it can
156// be empty.
157//============================================================================
158
159.section .debug_line
160_picoMark_LINES=
161
162//============================================================================
163// Debug Information
164//============================================================================
165.section .debug_info
166
167//Fixed header.
168.unalignedInitLong _picoMark_DEBUG_INFO_END-_picoMark_DEBUG_INFO_BEGIN
169_picoMark_DEBUG_INFO_BEGIN=
170.unalignedInitWord 0x2
171.unalignedInitLong _picoMark_ABBREVIATIONS
172.initByte 0x2
173
174// Compile unit information.
175.uleb128 0x1 // (DIE 0xb) DW_TAG_compile_unit)
176.unalignedInitLong _picoMark_LINES
177.unalignedInitWord _picoMark_FUNCTION_END
178.unalignedInitWord _picoMark_FUNCTION_BEGIN
179// Producer is `picoChip'
180.ascii 16#70# 16#69# 16#63# 16#6f# 16#43# 16#68# 16#69# 16#70# 16#00#
181.unalignedInitWord 0xcafe // ASM language
182.ascii 16#0# // Name. DwarfLib expects this to be present.
183
184.uleb128 0x2 ;# (DIE DW_TAG_subprogram)
185
186// FUNCTION NAME GOES HERE. Use `echo name | od -t x1' to get the hex. Each hex
187// digit is specified using the format 16#XX#
188.ascii 16#5f# 16#5f# 16#70# 16#6f# 16#70# 16#63# 16#6f# 16#75# 16#6e# 16#74# 16#68# 16#69# 16#32# 16#0# // Function name `__popcounthi2'
189.unalignedInitWord _picoMark_FUNCTION_BEGIN // DW_AT_low_pc
190.unalignedInitWord _picoMark_FUNCTION_END // DW_AT_high_pc
191
192.initByte 0x0 // end of compile unit children.
193
194_picoMark_DEBUG_INFO_END=
195
196//============================================================================
197// END OF DWARF
198//============================================================================
199
200.section .endFile
201// End of picoChip ASM file
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