derek.holloway
7502bf64a4
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61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
#include <stdio.h>
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#include <math.h>
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#include <stdlib.h>
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float no1,no2,no3,no4,no5,no6,no7;
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float result,resultd,resultld;
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float *float_memory;
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long double ldx = 88888888888888888888.88, ldy = 9999999999999999999.99;
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double x = 100.345, y = 25.7789;
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/* marks FPU stack as empty */
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void empty_fpu_stack()
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{
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asm ("ffree %st(1) \n\t"
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"ffree %st(2) \n\t"
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"ffree %st(3) \n\t"
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"ffree %st(4) \n\t"
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"ffree %st(5) \n\t"
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"ffree %st(6) \n\t"
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"ffree %st(7)");
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}
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/* initialization of floats */
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void init_floats()
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{
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no1 = 10.45;
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no2 = 20.77;
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no3 = 156.89874646;
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no4 = 14.56;
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no5 = 11.11;
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no6 = 66.77;
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no7 = 88.88;
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float_memory = malloc(sizeof(float) * 4);
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*float_memory = 256.256;
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*(float_memory + 1) = 356.356;
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*(float_memory + 2) = 456.456;
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*(float_memory + 3) = 556.556;
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}
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int main()
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{
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init_floats();
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empty_fpu_stack(); /* BEGIN I387-FLOAT-REVERSE */
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asm("nop"); /* TEST ENV */
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asm ("fsave %0" : "=m"(*float_memory) : );
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asm ("frstor %0" : : "m"(*float_memory));
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asm ("fstsw %ax"); /* test eax register */
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asm ("fld1");
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asm ("fldl2t");
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asm ("fldl2e");
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asm ("fldpi");
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asm ("fldlg2");
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asm ("fldln2");
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asm ("fldz");
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asm ("nop");
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return 1; /* END I387-FLOAT-REVERSE */
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}
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