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New accuracy for knl.h

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This commit is contained in:
Vsevolod Livinskiy
2015-04-20 22:17:25 +03:00
parent 1d40f0a930
commit 858a97a485
1 changed files with 2 additions and 2 deletions
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4
examples/intrinsics/knl.h
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@@ -2615,7 +2615,7 @@ static FORCEINLINE __vec16_f __sqrt_varying_float(__vec16_f v) {
static FORCEINLINE __vec16_f __rcp_varying_float(__vec16_f v) {
#ifdef ISPC_FAST_MATH
return _mm512_rcp23_ps(v); // Approximation with 23 bits of accuracy.
return _mm512_rcp28_ps(v); // Approximation with 28 bits of accuracy.
#else
return _mm512_recip_ps(v);
#endif
@@ -2634,7 +2634,7 @@ static FORCEINLINE double __rcp_uniform_double(double v)
static FORCEINLINE __vec16_f __rsqrt_varying_float(__vec16_f v) {
#ifdef ISPC_FAST_MATH
return _mm512_rsqrt23_ps(v); // Approximation with 0.775ULP accuracy
return _mm512_rsqrt28_ps(v); // Approximation with 28 bits of accuracy
#else
return _mm512_invsqrt_ps(v);
#endif