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Motorola SC140 user manual

Models: SC140

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Page 29

Compiler Support on StarCore

data:	0x01 0x23 0x45 0x67 0x89 0xAB 0xCD 0xEF
	0xAA 0xBB 0xCC 0xDD 0xEE 0xFF 0x11 0x22

move #data+2,r0	r0
move.w (r0),d0	d0
	d0
move.2w (r0),d0:d1	d0
	d1

Expected

00	0000	4567

00	0000	4567

FF	FFFF	89AB

Simulator

00	0000	4567

00	0000	0123

00	0000	4567

move.2f (r0),d2:d3	d2		00	4567	0000
	d3
	d3		FF	89AB	0000


move.4w (r0),d4:d5:d6:d7	d4	00		0000	4567
	d5
	d5		FF	FFFF	89AB
	d6		FF	FFFF	89AB
	d6		FF	FFFF	CDEF
	d7
	d7		FF	FFFF	AABB
move.2l (r0),d8:d9	d8
move.2l (r0),d8:d9	d8		00	4567	89AB
	d9		FF	CDEF	AABB

	00		0123	0000

	00		4567	0000


00			0000	0123

00			0000	4567
	FF		FFFF	89AB

		FF	FFFF	CDEF


	00		0123	4567

		FF	89AB	CDEF

Aligned/Not Aligned

The crosses indicate that the results provided by the simulator are not-aligned operations. If this is not taken into account, unpredictable results can occur when migrating to the hardware (which requires aligned data).

Introduction to the SC140 Tools

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Image 29

Contents

Contents Recommended ReadingMOTOROLA Semiconductor Products Sector Application NoteOn a Windows platform C \MotorolaDSP\SC140\ r e k n i L CompilerIR library files .libGood To Know 1 File I/O ExerciseHands On 2.1 Hardware Support on StarCore 2 Integer and Fractional Arithmetic Exercisey = ∑ x 2 2.2 Compiler Support on StarCoreInteger Arithmetic Hands OnFractional Arithmetic Good To Know To perform fractional operations Intrinsics are usedLocal Optimization 3 Local Versus Global Optimization Exercisethe main file called Ex3main.c a function file called Ex3prod.c Hands OnCompiler Support on StarCore StarCore C Compiler Global OptimizationGlobal Optimization Local OptimizationGood To Know 4 Memory Alignment ExerciseGlobal optimization further optimizes the application speed Dh represents D0D1, D2D3, D4D5, D6D7, D8D9, D10D11, D12D13, or D14D15 Hands On 6. Open an assembly window Windows-Assembly Good To Know 5 Split Summation Exercisey = ∑ x 2 1. Open the Ex5.c file Hands Ony n = ∑ a i x n 6 Multi-Sample Exercisefor 0 ≤ n L Good To Know1. Open the Ex6.c file Intermediate Version Compromise Between Memory and SpeedHands On 9. Save Ex61.c as Ex62.c Further Speed Optimization7 Control Code The True Bit Exercise 1. Open the example Ex7.c file Hands On8 Calling an Assembly Routine From C Exercise Hands On SP Current5. Modify the addvecs.asm file to incorporate your offset values Hands On 9 The ChallengeGood To Know Compiler Support on StarCore 10 Solutions to ExercisesNo code modification is required ExerciseExercise Compiler Support on StarCorePage Introduction to the SC140 Tools Compiler Support on StarCoreIntermediate version Compromise between Memory and Speed ExerciseCompiler Support on StarCore Introduction to the SC140 Tools Compiler Support on StarCoreshort y32 Further Optimizing the SpeedCompiler Support on StarCore Introduction to the SC140 Tools Compiler Support on StarCoreIntroduction to the SC140 Tools Compiler Support on StarCoreIntroduction to the SC140 Tools Compiler Support on StarCoreCompiler Support on StarCore ExerciseIntroduction to the SC140 Tools Compiler Support on StarCoreIntroduction to the SC140 Tools Compiler Support on StarCoreEOnCE is a registered trademark of Motorola, Inc AN2009/D