SpinAsm EXP - Revision history

PedalPCB at 13:47, 22 November 2024

2024-11-22T13:47:12Z

← Older revision		Revision as of 13:47, 22 November 2024
Line 42:		Line 42:

	======Coding Example======		======Coding Example======
	<~~syntaxhighlight line="1"~~>		<pre>
	exp 0.8,0		exp 0.8,0
	</~~syntaxhighlight~~>		</pre>

PedalPCB at 20:56, 6 January 2023

2023-01-06T20:56:25Z

← Older revision		Revision as of 20:56, 6 January 2023
Line 17:		Line 17:

	D is intended to allow the linear ACC to be offset by a constant in the range from –1 to +0.9990234375		D is intended to allow the linear ACC to be offset by a constant in the range from –1 to +0.9990234375

			====== Parameters ======
	{\| class="wikitable"		{\| class="wikitable"
	\|+~~Parameters~~		\|+
	!Name		!Name
	!Width		!Width

PedalPCB at 20:54, 6 January 2023

2023-01-06T20:54:23Z

← Older revision		Revision as of 20:54, 6 January 2023
Line 18:		Line 18:
	D is intended to allow the linear ACC to be offset by a constant in the range from –1 to +0.9990234375		D is intended to allow the linear ACC to be offset by a constant in the range from –1 to +0.9990234375
	{\| class="wikitable"		{\| class="wikitable"
	\|+		\|+Parameters
	!Name		!Name
	!Width		!Width

PedalPCB: Created page with "==EXP== {| class="wikitable" |+ !Mnemonic !Operation !Instruction coding |- |EXP |C * EXP(ACC) + D |CCCCCCCCCCCCCCCCDDDDDDDDDDD01100 |} ======Description====== EXP will multiply 2^ACC with C and add the constant D to the result. Since ACC (in it’s role as the destination for the EXP instruction) is limited to linear values from 0 to +0.99999988, the EXP instruction is limited to logarithmic ACC values (in it’s role as the source operand for the EXP instruction) ..."

2023-01-06T20:46:37Z

Created page with "==EXP== {| class="wikitable" |+ !Mnemonic !Operation !Instruction coding |- |EXP |C * EXP(ACC) + D |CCCCCCCCCCCCCCCCDDDDDDDDDDD01100 |} ======Description====== EXP will multiply 2^ACC with C and add the constant D to the result. Since ACC (in it’s role as the destination for the EXP instruction) is limited to linear values from 0 to +0.99999988, the EXP instruction is limited to logarithmic ACC values (in it’s role as the source operand for the EXP instruction) ..."

New page

==EXP==
{| class="wikitable"
|+
!Mnemonic
!Operation
!Instruction coding
|-
|EXP
|C * EXP(ACC) + D
|CCCCCCCCCCCCCCCCDDDDDDDDDDD01100
|}

======Description======
EXP will multiply 2^ACC with C and add the constant D to the result.

Since ACC (in it’s role as the destination for the EXP instruction) is limited to linear values from 0 to +0.99999988, the EXP instruction is limited to logarithmic ACC values (in it’s role as the source operand for the EXP instruction) from –16 to 0. Like the LOG instruction, EXP will treat the ACC content as a S4.19 number. Positive logarithmic ACC values will be clipped to +0.99999988 which is the most positive linear value that can be represented within the accumulator.

D is intended to allow the linear ACC to be offset by a constant in the range from –1 to +0.9990234375
{| class="wikitable"
|+
!Name
!Width
!Entry formats, range
|-
|C
|16 Bit
|Real (S1.14)
Hex ($0000 $FFFF)

Symbolic
|-
|D
|11 Bit
|Real(S.10)
Symbolic
|}

======Syntax======
EXP C, D

======Coding Example======
<syntaxhighlight line="1">
exp 0.8,0
</syntaxhighlight>