Change softplus to ggml_softplus

Author: pwilkin

ggml/src/ggml-cpu/ops.cpp

@@ -8637,7 +8637,7 @@ static void ggml_compute_forward_ssm_scan_f32(
                 // n_head
                 for (int h = ih0; h < ih1; ++h) {
                     // ref: https://github.com/state-spaces/mamba/blob/62db608da60f6fc790b8ed9f4b3225e95ca15fde/mamba_ssm/ops/triton/softplus.py#L16
-                    const float dt_soft_plus = softplus(dt[h]);
+                    const float dt_soft_plus = ggml_softplus(dt[h]);
                     const float dA = expf(dt_soft_plus * A[h]);
                     const int g = h / (nh / ng); // repeat_interleave
 
@@ -8734,7 +8734,7 @@ static void ggml_compute_forward_ssm_scan_f32(
                 // n_head
                 for (int h = ih0; h < ih1; ++h) {
                     // ref: https://github.com/state-spaces/mamba/blob/62db608da60f6fc790b8ed9f4b3225e95ca15fde/mamba_ssm/ops/triton/softplus.py#L16
-                    const float dt_soft_plus = softplus(dt[h]);
+                    const float dt_soft_plus = ggml_softplus(dt[h]);
                     const int g = h / (nh / ng); // repeat_interleave
 
                     // dim

ggml/src/ggml-impl.h

@@ -102,7 +102,7 @@ static bool ggml_op_is_empty(enum ggml_op op) {
     }
 }
 
-static inline float softplus(float input) {
+static inline float ggml_softplus(float input) {
     return (input > 20.0f) ? input : logf(1 + expf(input));
 }
 //

ggml/src/ggml.c

@@ -2664,8 +2664,8 @@ struct ggml_tensor * ggml_xielu(
     struct ggml_tensor * result = ggml_dup_tensor(ctx, a);
 
     ggml_set_op_params_i32(result, 0, (int32_t) GGML_UNARY_OP_XIELU);
-    ggml_set_op_params_f32(result, 1, beta + softplus(alpha_n));
-    ggml_set_op_params_f32(result, 2, softplus(alpha_p));
+    ggml_set_op_params_f32(result, 1, beta + ggml_softplus(alpha_n));
+    ggml_set_op_params_f32(result, 2, ggml_softplus(alpha_p));
     ggml_set_op_params_f32(result, 3, beta);
     ggml_set_op_params_f32(result, 4, eps);