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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1906 | serge | 1 | #include |
| 2 | #include |
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| 3 | |||
| 4 | float |
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| 5 | truncf (float _x) |
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| 6 | { |
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| 7 | float retval; |
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| 8 | unsigned short saved_cw; |
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| 9 | unsigned short tmp_cw; |
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| 10 | __asm__ ("fnstcw %0;" : "=m" (saved_cw)); /* save FPU control word */ |
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| 11 | tmp_cw = (saved_cw & ~(FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO)) |
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| 12 | | FE_TOWARDZERO; |
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| 13 | __asm__ ("fldcw %0;" : : "m" (tmp_cw)); |
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| 14 | __asm__ ("frndint;" : "=t" (retval) : "0" (_x)); /* round towards zero */ |
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| 15 | __asm__ ("fldcw %0;" : : "m" (saved_cw) ); /* restore saved control word */ |
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| 16 | return retval; |
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| 17 | } |