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Commit da8f79c2 authored by Matthieu Schaller's avatar Matthieu Schaller
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Re-ordered some operations in the scalar versions of SPH schemes to take... 

Re-ordered some operations in the scalar versions of SPH schemes to take advantage of the faster rsqrt calls.
parent 08cca88d
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src/hydro/Gadget2/hydro_iact.h
View file @ da8f79c2
......@@ -59,9 +59,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_density(
const float mi = pi->mass;
const float mj = pj->mass;
/* Get r and r inverse. */
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and 1/r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Compute the kernel function for pi */
const float hi_inv = 1.f / hi;
......@@ -148,9 +148,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_density(
/* Get the masses. */
const float mj = pj->mass;
/* Get r and r inverse. */
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and 1/r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Compute the kernel function */
const float hi_inv = 1.0f / hi;
......@@ -440,8 +440,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_force(
const float fac_mu = pow_three_gamma_minus_five_over_two(a);
const float a2_Hubble = a * a * H;
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and 1/r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Get some values in local variables. */
const float mi = pi->mass;
......@@ -559,8 +560,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_force(
const float fac_mu = pow_three_gamma_minus_five_over_two(a);
const float a2_Hubble = a * a * H;
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and 1/r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Get some values in local variables. */
// const float mi = pi->mass;
......
src/hydro/Minimal/hydro_iact.h
View file @ da8f79c2
......@@ -53,7 +53,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_density(
float wi, wj, wi_dx, wj_dx;
const float r = sqrtf(r2);
/* Get r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Get the masses. */
const float mi = pi->mass;
......@@ -101,8 +103,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_density(
/* Get the masses. */
const float mj = pj->mass;
/* Get r and r inverse. */
const float r = sqrtf(r2);
/* Get r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
const float h_inv = 1.f / hi;
const float ui = r * h_inv;
......@@ -134,8 +137,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_force(
const float fac_mu = pow_three_gamma_minus_five_over_two(a);
const float a2_Hubble = a * a * H;
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and r inverse. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Recover some data */
const float mi = pi->mass;
......@@ -246,8 +250,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_force(
const float fac_mu = pow_three_gamma_minus_five_over_two(a);
const float a2_Hubble = a * a * H;
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and r inverse. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Recover some data */
// const float mi = pi->mass;
......
src/hydro/PressureEntropy/hydro_iact.h
View file @ da8f79c2
......@@ -54,9 +54,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_density(
const float mi = pi->mass;
const float mj = pj->mass;
/* Get r and r inverse. */
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and 1/r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Compute the kernel function for pi */
const float hi_inv = 1.f / hi;
......@@ -142,9 +142,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_density(
/* Get the masses. */
const float mj = pj->mass;
/* Get r and r inverse. */
const float r = sqrtf(r2);
const float ri = 1.0f / r;
/* Get r and 1/r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Compute the kernel function */
const float h_inv = 1.0f / hi;
......@@ -164,7 +164,7 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_density(
pi->density.pressure_dh -=
mj * pj->entropy_one_over_gamma * (hydro_dimension * wi + ui * wi_dx);
const float fac = mj * wi_dx * ri;
const float fac = mj * wi_dx * r_inv;
/* Compute dv dot r */
dv[0] = pi->v[0] - pj->v[0];
......@@ -205,8 +205,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_force(
const float fac_mu = pow_three_gamma_minus_five_over_two(a);
const float a2_Hubble = a * a * H;
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and 1/r . */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Get some values in local variables. */
const float mi = pi->mass;
......@@ -318,8 +319,9 @@ __attribute__((always_inline)) INLINE static void runner_iact_nonsym_force(
const float fac_mu = pow_three_gamma_minus_five_over_two(a);
const float a2_Hubble = a * a * H;
const float r = sqrtf(r2);
const float r_inv = 1.0f / r;
/* Get r and 1/r. */
const float r_inv = 1.0f / sqrtf(r2);
const float r = r2 * r_inv;
/* Get some values in local variables. */
// const float mi = pi->mass;
......
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