108 lines
1.9 KiB
C
108 lines
1.9 KiB
C
/* { dg-do run } */
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/* { dg-require-effective-target sse4 } */
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/* { dg-options "-O2 -msse4.1" } */
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/* { dg-skip-if "no M_PI" { vxworks_kernel } } */
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#include "sse4_1-check.h"
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#include <smmintrin.h>
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#include <math.h>
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#include <string.h>
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#define NUM 64
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static void
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init_round (float *src)
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{
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int i, sign = 1;
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float f = rand ();
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for (i = 0; i < NUM; i++)
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{
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src[i] = (i + 1)* f * M_PI * sign;
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if (i < (NUM / 2))
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{
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if ((i % 6) == 0)
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f = f * src[i];
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}
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else if (i == (NUM / 2))
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f = rand ();
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else if ((i % 6) == 0)
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f = 1 / (f * (i + 1) * src[i] * M_PI *sign);
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sign = -sign;
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}
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}
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static float
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do_round (float f, int type)
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{
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short saved_cw, new_cw, clr_mask;
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float ret;
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if ((type & 4))
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{
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type = 0;
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clr_mask = 0xFFFF;
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}
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else
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{
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type = 0x003F | ((type & 3) << 10);
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clr_mask = ~0x0C3F;
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}
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__asm__ ("flds %0" : : "m" (*&f));
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__asm__ ("fstcw %0" : "=m" (*&saved_cw));
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new_cw = saved_cw & clr_mask;
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new_cw |= type;
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__asm__ ("fldcw %0" : : "m" (*&new_cw));
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__asm__ ("frndint\n"
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"fstps %0\n" : "=m" (*&ret));
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__asm__ ("fldcw %0" : : "m" (*&saved_cw));
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return ret;
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}
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static void
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sse4_1_test (void)
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{
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int i, j;
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float f;
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union
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{
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__m128 x[NUM / 4];
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float f[NUM];
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} dst, src;
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init_round (src.f);
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memset (&dst, 0, NUM * sizeof(float));
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for (i = 0; i < NUM / 4 ; i++)
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dst.x[i] = _mm_round_ss (dst.x[i], src.x[i], _MM_FROUND_RINT);
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for (i = 0; i < NUM; i += 4)
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{
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for (j = 0; j < 3; j++)
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if (dst.f[i + j + 1] != 0.0)
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abort ();
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f = do_round (src.f[i], 0x04);
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if (f != dst.f[i])
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abort ();
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}
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for (i = 0; i < NUM / 4 ; i++)
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dst.x[i] = _mm_round_ss (dst.x[i], src.x[i], _MM_FROUND_NEARBYINT);
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for (i = 0; i < NUM; i += 4)
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{
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for (j = 0; j < 3; j++)
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if (dst.f[i + j + 1] != 0.0)
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abort ();
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f = do_round (src.f[i], 0x0c);
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if (f != dst.f[i])
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abort ();
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}
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}
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