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| en:multiasm:papc:chapter_6_10 [2025/10/31 16:27] – [FPU control instructions] ktokarz | en:multiasm:papc:chapter_6_10 [2025/10/31 16:28] (current) – [Table] ktokarz | ||
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| <table ftrans> | <table ftrans> | ||
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| - | ^ Mnemonic | + | ^ Mnemonic |
| | **f2xm1** | | **f2xm1** | ||
| | **fyl2x** | | **fyl2x** | ||
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| ===== FPU control instructions ===== | ===== FPU control instructions ===== | ||
| The FPU control instructions help the programmer to save and restore the contents of chosen registers if there is a need to use them in an interrupt handler or inside a function. It is also possible to initialise the state of the FPU unit or clear errors. | The FPU control instructions help the programmer to save and restore the contents of chosen registers if there is a need to use them in an interrupt handler or inside a function. It is also possible to initialise the state of the FPU unit or clear errors. | ||
| - | The **fincstp*** increments and **fdecstp** decrements the FPU register stack pointer. | + | The **fincstp** increments and **fdecstp** decrements the FPU register stack pointer. |
| The following set of instructions can perform error checking while execution (instructions without " | The following set of instructions can perform error checking while execution (instructions without " | ||
| The **finit** and **fninit** initialise the FPU (after checking error conditions or without checking error conditions). | The **finit** and **fninit** initialise the FPU (after checking error conditions or without checking error conditions). | ||
