Floating Point Instructions
5-60 M68000 FAMILY PROGRAMMER’S REFERENCE MANUAL MOTOROLA
FLOG10 Log
10
FLOG10
(MC6888X, M68040FPSP)
R/M field—Specifies the source operand address mode.
0 — The operation is register to register.
1 — The operation is < ea > to register.
Source Specifier field—Specifies the source register or data format.
If R/M = 0, specifies the source floating-point data register.
If R/M = 1, specifies the source data format:
000 —Long-Word Integer (L)
001 —Single-Precision Real (S)
010 —Extended-Precision Real (X)
011 — Packed-Decimal Real (P)
100 —Word Integer (W)
101 —Double-Precision Real (D)
110 — Byte Integer (B)
Destination Register field—Specifies the destination floating- point data register. If R/
M = 0 and the source and destination fields are equal, then the input operand is
taken from the specified floating-point data register, and the result is written into
the same register. If the single register syntax is used, Motorola assemblers set
the source and destination fields to the same value.
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