參數(shù)資料
型號(hào): 21928
英文描述: Low-Frequency, Spread-Spectrum EconOscillator
中文描述: 的AMD - K6 - 2E處理器數(shù)據(jù)手冊3DNow?。考夹g(shù)手冊
文件頁數(shù): 30/72頁
文件大?。?/td> 845K
代理商: 21928
20
3DNow! Instruction Set
Chapter 2
3DNow! Technology Manual
21928G/0—March 2000
Functional Illustration of the PAVGUSB Instruction
The following list explains the functional illustration of the PAVGUSB instruction:
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The rounded byte average of FFh and FFh is FFh.
The rounded byte average of FFh and 00h is 80h.
The rounded byte average of 01h and FFh is also 80h.
The rounded byte average of 0Fh and 10h is 10h.
The rounded byte average of 00h and 01h is 01h.
The rounded byte average of 70h and 44h is 5Ah.
The rounded byte average of 07h and F7h is 7Fh.
The rounded byte average of 9Ah and A8h is A1h.
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The equations for byte averaging with rounding are as follows:
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mmreg1[63:56] = (mmreg1[63:56] + mmreg2/mem64[63:56] + 01h)/2
mmreg1[55:48] = (mmreg1[55:48] + mmreg2/mem64[55:48] + 01h)/2
mmreg1[47:40] = (mmreg1[47:40] + mmreg2/mem64[47:40] + 01h)/2
mmreg1[39:32] = (mmreg1[39:32] + mmreg2/mem64[39:32] + 01h)/2
mmreg1[31:24] = (mmreg1[31:24] + mmreg2/mem64[31:24] + 01h)/2
mmreg1[23:16] = (mmreg1[23:16] + mmreg2/mem64[23:16] + 01h)/2
mmreg1[15:8] = (mmreg1[15:8] + mmreg2/mem64[15:8] + 01h)/2
mmreg1[7:0] = (mmreg1[7:0] + mmreg2/mem64[7:0] + 01h)/2
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FFh
FFh
01h
0Fh
9Ah
00h
70h 07h
mmreg2/mem64
mmreg1
per byte averaging
=
=
=
=
=
=
=
=
FFh 80h
80h
10h
A1h
01h
5Ah 7Fh
mmreg1
FFh
00h
FFh
10h
A8h
01h
44h F7h
0
63
0
63
0
63
Indicates a value that was rounded-up
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