diff options
Diffstat (limited to 'gcc/config/arm/arm.c')
| -rw-r--r-- | gcc/config/arm/arm.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index 36b86dd760c..567b75ece9c 100644 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -840,6 +840,10 @@ int arm_arch_thumb2; int arm_arch_arm_hwdiv; int arm_arch_thumb_hwdiv; +/* Nonzero if we should use Neon to handle 64-bits operations rather + than core registers. */ +int prefer_neon_for_64bits = 0; + /* In case of a PRE_INC, POST_INC, PRE_DEC, POST_DEC memory reference, we must report the mode of the memory reference from TARGET_PRINT_OPERAND to TARGET_PRINT_OPERAND_ADDRESS. */ @@ -937,6 +941,7 @@ const struct tune_params arm_slowmul_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; const struct tune_params arm_fastmul_tune = @@ -951,6 +956,7 @@ const struct tune_params arm_fastmul_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; /* StrongARM has early execution of branches, so a sequence that is worth @@ -968,6 +974,7 @@ const struct tune_params arm_strongarm_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; const struct tune_params arm_xscale_tune = @@ -982,6 +989,7 @@ const struct tune_params arm_xscale_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; const struct tune_params arm_9e_tune = @@ -996,6 +1004,7 @@ const struct tune_params arm_9e_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; const struct tune_params arm_v6t2_tune = @@ -1010,6 +1019,7 @@ const struct tune_params arm_v6t2_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; /* Generic Cortex tuning. Use more specific tunings if appropriate. */ @@ -1025,6 +1035,7 @@ const struct tune_params arm_cortex_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; const struct tune_params arm_cortex_a15_tune = @@ -1039,6 +1050,7 @@ const struct tune_params arm_cortex_a15_tune = true, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; /* Branches can be dual-issued on Cortex-A5, so conditional execution is @@ -1056,6 +1068,7 @@ const struct tune_params arm_cortex_a5_tune = false, /* Prefer LDRD/STRD. */ {false, false}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; const struct tune_params arm_cortex_a9_tune = @@ -1070,6 +1083,7 @@ const struct tune_params arm_cortex_a9_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; /* The arm_v6m_tune is duplicated from arm_cortex_tune, rather than @@ -1086,6 +1100,7 @@ const struct tune_params arm_v6m_tune = false, /* Prefer LDRD/STRD. */ {false, false}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; const struct tune_params arm_fa726te_tune = @@ -1100,6 +1115,7 @@ const struct tune_params arm_fa726te_tune = false, /* Prefer LDRD/STRD. */ {true, true}, /* Prefer non short circuit. */ &arm_default_vec_cost, /* Vectorizer costs. */ + false /* Prefer Neon for 64-bits bitops. */ }; @@ -2130,6 +2146,12 @@ arm_option_override (void) global_options.x_param_values, global_options_set.x_param_values); + /* Use Neon to perform 64-bits operations rather than core + registers. */ + prefer_neon_for_64bits = current_tune->prefer_neon_for_64bits; + if (use_neon_for_64bits == 1) + prefer_neon_for_64bits = true; + /* Use the alternative scheduling-pressure algorithm by default. */ maybe_set_param_value (PARAM_SCHED_PRESSURE_ALGORITHM, 2, global_options.x_param_values, |