webrtc/common_audio/signal_processing/spl_sqrt_floor_arm.S - Issue 1413333002: system_wrappers: rename interface -> include

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Side by Side Diff: webrtc/common_audio/signal_processing/spl_sqrt_floor_arm.S

Issue 1413333002: system_wrappers: rename interface -> include (Closed) Base URL: https://chromium.googlesource.com/external/webrtc.git@master

Patch Set: Rebased again! Created 5 years, 1 month ago

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1 @	1 @

2 @ Written by Wilco Dijkstra, 1996. The following email exchange establishes the	2 @ Written by Wilco Dijkstra, 1996. The following email exchange establishes the

3 @ license.	3 @ license.

4 @	4 @

5 @ From: Wilco Dijkstra <Wilco.Dijkstra@ntlworld.com>	5 @ From: Wilco Dijkstra <Wilco.Dijkstra@ntlworld.com>

6 @ Date: Fri, Jun 24, 2011 at 3:20 AM	6 @ Date: Fri, Jun 24, 2011 at 3:20 AM

7 @ Subject: Re: sqrt routine	7 @ Subject: Re: sqrt routine

8 @ To: Kevin Ma <kma@google.com>	8 @ To: Kevin Ma <kma@google.com>

9 @ Hi Kevin,	9 @ Hi Kevin,

10 @ Thanks for asking. Those routines are public domain (originally posted to	10 @ Thanks for asking. Those routines are public domain (originally posted to

(...skipping 14 matching lines...) Expand all Loading...
25 @ Thanks.	25 @ Thanks.

26 @ Kevin	26 @ Kevin

27	27

28 @ Minor modifications in code style for WebRTC, 2012.	28 @ Minor modifications in code style for WebRTC, 2012.

29 @ Output is bit-exact with the reference C code in spl_sqrt_floor.c.	29 @ Output is bit-exact with the reference C code in spl_sqrt_floor.c.

30	30

31 @ Input : r0 32 bit unsigned integer	31 @ Input : r0 32 bit unsigned integer

32 @ Output: r0 = INT (SQRT (r0)), precision is 16 bits	32 @ Output: r0 = INT (SQRT (r0)), precision is 16 bits

33 @ Registers touched: r1, r2	33 @ Registers touched: r1, r2

34	34

35 #include "webrtc/system_wrappers/interface/asm_defines.h"	35 #include "webrtc/system_wrappers/include/asm_defines.h"

36	36

37 GLOBAL_FUNCTION WebRtcSpl_SqrtFloor	37 GLOBAL_FUNCTION WebRtcSpl_SqrtFloor

38 .align 2	38 .align 2

39 DEFINE_FUNCTION WebRtcSpl_SqrtFloor	39 DEFINE_FUNCTION WebRtcSpl_SqrtFloor

40 mov r1, #3 << 30	40 mov r1, #3 << 30

41 mov r2, #1 << 30	41 mov r2, #1 << 30

42	42

43 @ unroll for i = 0 .. 15	43 @ unroll for i = 0 .. 15

44	44

45 cmp r0, r2, ror #2 * 0	45 cmp r0, r2, ror #2 * 0

(...skipping 55 matching lines...) Expand 10 before \| Expand all \| Expand 10 after Loading...
101 cmp r0, r2, ror #2 * 14	101 cmp r0, r2, ror #2 * 14

102 subhs r0, r0, r2, ror #2 * 14	102 subhs r0, r0, r2, ror #2 * 14

103 adc r2, r1, r2, lsl #1	103 adc r2, r1, r2, lsl #1

104	104

105 cmp r0, r2, ror #2 * 15	105 cmp r0, r2, ror #2 * 15

106 subhs r0, r0, r2, ror #2 * 15	106 subhs r0, r0, r2, ror #2 * 15

107 adc r2, r1, r2, lsl #1	107 adc r2, r1, r2, lsl #1

108	108

109 bic r0, r2, #3 << 30 @ for rounding add: cmp r0, r2 adc r2, #1	109 bic r0, r2, #3 << 30 @ for rounding add: cmp r0, r2 adc r2, #1

110 bx lr	110 bx lr

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