Inside Macintosh: PowerPC Numerics / Part 3 - Numerics in PowerPC Assembly Language

Chapter 13 - Assembly-Language Numeric Conversions

Conversions From Single to Double Format

To convert a single floating-point number to double format, you simply load a single-format number into a floating-point register; the conversion takes place automatically. The following load instructions automatically convert single format to double. These instructions raise no floating-point exceptions and treat zeros, NaNs, and Infinities like any other value.

lfs	Load single format.
lfsu	Load single format and update.
lfsux	Load single format and update indexed.
lfsx	Load single format indexed.

For more information on the load instructions, see Chapter 11, "Introduction to Assembly-Language Numerics."