5.2. Floating-point registers

The VFP coprocessor has 32 single-precision registers, s0 to s31. Each register can contain either a single-precision floating-point value, or a 32-bit integer.

These 32 registers are also treated as 16 double-precision registers, d0 to d15. dn occupies the same hardware as s(2n) and s(2n+1).

You can use:

Do not attempt to use corresponding single-precision and double-precision registers at the same time. No damage is caused but the results are meaningless.

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