diff options
Diffstat (limited to 'generic/Tanh.c')
-rw-r--r-- | generic/Tanh.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/generic/Tanh.c b/generic/Tanh.c new file mode 100644 index 0000000..5c24d15 --- /dev/null +++ b/generic/Tanh.c @@ -0,0 +1,45 @@ +#ifndef TH_GENERIC_FILE +#define TH_GENERIC_FILE "generic/Tanh.c" +#else + +static int nn_(Tanh_updateOutput)(lua_State *L) +{ + THTensor *input = luaT_checkudata(L, 2, torch_(Tensor_id)); + THTensor *output = luaT_getfieldcheckudata(L, 1, "output", torch_(Tensor_id)); + + THTensor_(resizeAs)(output, input); + + TH_TENSOR_APPLY2(real, output, real, input, \ + *output_data = tanh(*input_data);) + + return 1; +} + +static int nn_(Tanh_updateGradInput)(lua_State *L) +{ + THTensor *gradOutput = luaT_checkudata(L, 3, torch_(Tensor_id)); + THTensor *output = luaT_getfieldcheckudata(L, 1, "output", torch_(Tensor_id)); + THTensor *gradInput = luaT_getfieldcheckudata(L, 1, "gradInput", torch_(Tensor_id)); + + THTensor_(resizeAs)(gradInput, output); + TH_TENSOR_APPLY3(real, gradInput, real, gradOutput, real, output, \ + real z = *output_data; \ + *gradInput_data = *gradOutput_data * (1. - z*z);); + return 1; +} + +static const struct luaL_Reg nn_(Tanh__) [] = { + {"Tanh_updateOutput", nn_(Tanh_updateOutput)}, + {"Tanh_updateGradInput", nn_(Tanh_updateGradInput)}, + {NULL, NULL} +}; + +static void nn_(Tanh_init)(lua_State *L) +{ + luaT_pushmetaclass(L, torch_(Tensor_id)); + luaT_registeratname(L, nn_(Tanh__), "nn"); + lua_pop(L,1); + +} + +#endif |