Intel Quark SoC X1000 Core Developer's Manual page 288

Table 94. Floating-Point Clock Count Summary (Sheet 6 of 8)
Instruction
FISUBR = Integer Subtract Reversed
ST(0)←16-bit memory-ST(0)
ST(0)←32-bit memory-ST(0)
FIMUL = Multiply Integer with ST(0)
ST(0)←ST(0) X 16-bit memory
ST(0)←ST(0) X 32-bit memory
FIDIV = Integer Divide
ST(0)←ST(0)/ 16-bit memory
ST(0)←ST(0)/ 32-bit memory
FIDVR = Integer Divide Reversed
ST(0)←16-bit memory/ST(0)
ST(0)←32-bit memory/ST(0)
FSQRT = Square Root
FSCALE = Scale ST(0) by ST(1)
FXTRACT = Extract Components of ST(0)
FPREM = Partial Reminder
FPREM1 = Partial Reminder (IEEE)
FRNDINT = Round ST(0) to Integer
Notes:
1. If operand is 0 clock counts = 27.
2. If operand is 0 clock counts = 28.
3. If CW.PC indicates 24 bit precision then subtract 38 clocks.
If CW.PC indicates 53 bit precision then subtract 11 clocks.
4. If there is a numeric error pending from a previous instruction, add 17 clocks.
5. If there is a numeric error pending from a previous instruction, add 18 clocks.
6. The INT pin is polled several times while this function is executing to ensure short interrupt latency.
7. If ABS(operand) is greater than π/4 then add n clocks, where n=(operand/(π/4)).
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Intel Quark SoC X1000 Core
Developer's Manual
288
Format
11011 110 : mod 101 r/m : s-i-b/disp.
11011 010 : mod 101 r/m : s-i-b/disp.
11011 110 : mod 101 r/m : s-i-b/disp.
11011 010 : mod 001 r/m : s-i-b/disp.
11011 110 : mod 110 r/m : s-i-b/disp.
11011 010 : mod 110 r/m : s-i-b/disp.
11011 110 : mod 111 r/m : s-i-b/disp.
11011 010 : mod 111 r/m : s-i-b/disp.
11011 001 : 1111 1010
11011 001 : 1111 1101
11011 001 : 1111 0100
11011 001 : 1111 1000
11011 001 : 1111 0101
11011 001 : 1111 1100
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Intel Quark Core—Instruction Set Summary
Cache Hit Concurrent
Penalty
Avg (Lower
if
Range... Avg (Lower
Cache
Upper Range- Upper
Miss
Range)
24(20-35) 2
22.5(19-32) 2
25(23-27) 2
23.5(19-32) 2
87(85-89) 2
85.5(84-86) 2
87(85-89) 2
85.5(84-86) 2
85.5(83-87)
31(30-32)
19(16-20)
84(70-138)
94.5(72-167)
29.1(21-30)
Order Number: 329679-001US
Execution
Notes
Range)
7(5-17)
7(5-17)
8
8
70 3
70 3
70 3
70 3
70
2
4(2-4)
2(2-8)
5.5(2-18)
7.4(2-8)
October 2013