ggml-cpu: fix compiler types

Signed-off-by: Aaron Teo <[email protected]>

Author: taronaeo

ggml/src/ggml-cpu/ggml-cpu.c

@@ -3145,8 +3145,8 @@ void ggml_cpu_fp32_to_fp16(const float * x, ggml_fp16_t * y, int64_t n) {
     for (; i + 7 < n; i += 8) {
         float32x4_t v_xh = vec_xl(0, (const float *)(x + i + 0));
         float32x4_t v_xl = vec_xl(0, (const float *)(x + i + 4));
-        __vector short int v_xd = vec_round_from_fp32(v_xh, v_xl, 0);
-        __vector short int v_xfp16 = vec_convert_to_fp16(v_xd, 0);
+        __vector short unsigned int v_xd = vec_round_from_fp32(v_xh, v_xl, 0);
+        __vector short unsigned int v_xfp16 = vec_convert_to_fp16(v_xd, 0);
         vec_xst(v_xfp16, 0, (ggml_fp16_t *)(y + i));
     }
 #endif