mirror of
https://github.com/ioacademy-jikim/debugging
synced 2025-06-11 18:06:21 +00:00
58 lines
979 B
C
58 lines
979 B
C
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/* Marginally test fprem/fprem1/fsincos; these are hard to check
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otherwise since compilers hardly ever generate them. */
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#include <stdio.h>
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double do_fprem ( void )
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{
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double res = 0.0;
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__asm__ __volatile__(
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"ffree %%st(0)\n\t"
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"ffree %%st(1)\n\t"
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"fldpi\n\t"
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"fldln2\n\t"
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"fprem\n\t"
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"fstpl 0(%0)"
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: : "r"(&res)
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);
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return res;
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}
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double do_fprem1 ( void )
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{
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double res = 0.0;
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__asm__ __volatile__(
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"ffree %%st(0)\n\t"
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"ffree %%st(1)\n\t"
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"fldpi\n\t"
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"fldln2\n\t"
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"fprem1\n\t"
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"fstpl 0(%0)"
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: : "r"(&res)
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);
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return res;
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}
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double do_fsincos ( void )
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{
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double res = 0.0;
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__asm__ __volatile__(
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"fldln2\n\t"
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"fsincos\n\t"
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"fsub %%st(1)\n\t"
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"fstpl 0(%0)"
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: : "r"(&res)
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);
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return res;
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}
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int main ( void )
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{
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__asm__ __volatile__("finit");
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printf("fprem %f\n", do_fprem());
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printf("fprem1 %f\n", do_fprem1());
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printf("fsincos %f\n", do_fsincos());
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return 0;
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}
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