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DSP1/Inverse: Difference between revisions
From SnesLab
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Latest revision as of 04:32, 11 January 2024
| Basic Info | |||||||
|---|---|---|---|---|---|---|---|
| Opcode | 10 | ||||||
| Speed | 98 cycles
12.9 μs | ||||||
Inverse is a DSP1 command that calculates a floating point multiplicative inverse (reciprocal).
Input Parameters
- a[M] is the coefficient
- b[C] is the exponent (in the range 8002 to 7FFFh)
The total input value is then a*2^b
Output Parameters
- A[M] is the coefficient
- B[C] is the exponent (in the range 8002 to 7FFFh)
References
- subparagraph 5.1.2 on page 3-5-2 of Book II of the official Super Nintendo development manual
- paragraph 6.2 on page 3-6-1 of Book II, lbid.
- https://github.com/bsnes-emu/bsnes/blob/master/bsnes/sfc/coprocessor/dsp1/dsp1emu.cpp#L305