diff --git a/src/init.c b/src/init.c
index 8c4424c..044472d 100644
--- a/src/init.c
+++ b/src/init.c
@@ -212,7 +212,7 @@
       .channel_tile = 8,
     };
     xnn_params.f32.clamp = (xnn_univector_ukernel_function) xnn_f32_clamp_ukernel__neon;
-    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__neon;
+    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__neon_x8;
     xnn_params.f32.prelu = (struct prelu_parameters) {
       .ukernel = (xnn_prelu_ukernel_function) xnn_f32_prelu_ukernel__neon_2x8,
       .row_tile = 2,
@@ -515,7 +515,7 @@
       .channel_tile = 8,
     };
     xnn_params.f32.clamp = (xnn_univector_ukernel_function) xnn_f32_clamp_ukernel__neon;
-    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__neonfma;
+    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__neonfma_x8;
     xnn_params.f32.sigmoid = (xnn_univector_ukernel_function) xnn_f32_sigmoid_ukernel__neon_frac_p9_p10_nr1recps_x16;
     xnn_params.f32.prelu = (struct prelu_parameters) {
       .ukernel = (xnn_prelu_ukernel_function) xnn_f32_prelu_ukernel__neon_2x8,
@@ -862,7 +862,15 @@
     } else {
       xnn_params.f32.clamp = (xnn_univector_ukernel_function) xnn_f32_clamp_ukernel__sse;
     }
-    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__sse;
+    if (!XNN_PLATFORM_MOBILE && cpuinfo_has_x86_avx512f()) {
+      xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__avx512f_x32;
+    } else if (!XNN_PLATFORM_MOBILE && cpuinfo_has_x86_fma3()) {
+      xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__fma3_x16;
+    } else if (!XNN_PLATFORM_MOBILE && cpuinfo_has_x86_avx()) {
+      xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__avx_x16;
+    } else {
+      xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__sse_x8;
+    }
     xnn_params.f32.sigmoid = (xnn_univector_ukernel_function) xnn_f32_sigmoid_ukernel__sse2_p5_div_x16;
     xnn_params.f32.prelu = (struct prelu_parameters) {
       .ukernel = (xnn_prelu_ukernel_function) xnn_f32_prelu_ukernel__sse2_2x8,
@@ -1093,7 +1101,7 @@
       .channel_tile = 8,
     };
     xnn_params.f32.clamp = (xnn_univector_ukernel_function) xnn_f32_clamp_ukernel__psimd;
-    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__psimd;
+    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__psimd_x8;
     xnn_params.f32.prelu = (struct prelu_parameters) {
       .ukernel = (xnn_prelu_ukernel_function) xnn_f32_prelu_ukernel__psimd_2x8,
       .row_tile = 2,
@@ -1298,7 +1306,7 @@
       .channel_tile = 2,
     };
     xnn_params.f32.clamp = (xnn_univector_ukernel_function) xnn_f32_clamp_ukernel__wasm;
-    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__wasm;
+    xnn_params.f32.hswish = (xnn_univector_ukernel_function) xnn_f32_hswish_ukernel__wasm_x4;
     xnn_params.f32.prelu = (struct prelu_parameters) {
       .ukernel = (xnn_prelu_ukernel_function) xnn_f32_prelu_ukernel__wasm_2x4,
       .row_tile = 4,