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Optimization: replace a division into a conditional move.

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Patrick Pelissier committed 2018-01-12 18:56:01 +01:00
1 parent 55332d61fd
commit aede0547d3
1 file changed
+3 -3
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m-buffer.h
+3 -3
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@@ -256,7 +256,7 @@ M_C(name, _init)(buffer_t v, size_t size) \
v->overwrite++; \ v->overwrite++; \
/* Let's clear the last element to overwrite it */ \ /* Let's clear the last element to overwrite it */ \
if (!BUFFERI_POLICY_P((policy), BUFFER_STACK)) { \ if (!BUFFERI_POLICY_P((policy), BUFFER_STACK)) { \
v->idx_prod = (v->idx_prod - 1) % BUFFERI_SIZE(m_size); \ v->idx_prod = (v->idx_prod == 0) ? BUFFERI_SIZE(m_size)-1 : (v->idx_prod - 1); \
} else { \ } else { \
(v->idx_prod) --; \ (v->idx_prod) --; \
} \ } \
@@ -279,7 +279,7 @@ M_C(name, _init)(buffer_t v, size_t size) \
\ \
/* Increment production INDEX of the buffer */ \ /* Increment production INDEX of the buffer */ \
if (!BUFFERI_POLICY_P((policy), BUFFER_STACK)) { \ if (!BUFFERI_POLICY_P((policy), BUFFER_STACK)) { \
v->idx_prod = (v->idx_prod +1) % BUFFERI_SIZE(m_size); \ v->idx_prod = (v->idx_prod == BUFFERI_SIZE(m_size)-1) ? 0 : (v->idx_prod + 1); \
} else { \ } else { \
(v->idx_prod) ++; \ (v->idx_prod) ++; \
} \ } \
@@ -332,7 +332,7 @@ M_C(name, _init)(buffer_t v, size_t size) \
} else { \ } else { \
M_DO_INIT_MOVE (oplist, *data, v->data[v->idx_cons]); \ M_DO_INIT_MOVE (oplist, *data, v->data[v->idx_cons]); \
} \ } \
v->idx_cons = (v->idx_cons +1) % BUFFERI_SIZE(m_size); \ v->idx_cons = (v->idx_cons == BUFFERI_SIZE(m_size)-1) ? 0 : (v->idx_cons + 1); \
} else { \ } else { \
/* STACK queue */ \ /* STACK queue */ \
v->idx_prod --; \ v->idx_prod --; \