1 // Auto-generated file. Do not edit! 2 // Template: src/f32-f16-vcvt/scalar-bitcast.c.in 3 // Generator: tools/xngen 4 // 5 // Copyright 2021 Google LLC 6 // 7 // This source code is licensed under the BSD-style license found in the 8 // LICENSE file in the root directory of this source tree. 9 10 #include <assert.h> 11 12 #include <xnnpack/common.h> 13 #include <xnnpack/math.h> 14 #include <xnnpack/vcvt.h> 15 16 xnn_f32_f16_vcvt_ukernel__scalar_bitcast_x1(size_t n,const float * input,void * output,const union xnn_f32_f16_cvt_params params[restrict XNN_MIN_ELEMENTS (1)])17void xnn_f32_f16_vcvt_ukernel__scalar_bitcast_x1( 18 size_t n, 19 const float* input, 20 void* output, 21 const union xnn_f32_f16_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) 22 { 23 assert(n != 0); 24 assert(n % sizeof(float) == 0); 25 assert(input != NULL); 26 assert(output != NULL); 27 28 const uint32_t vnonsign_mask = params->scalar_bitcast.nonsign_mask; 29 const uint32_t vexp_bias = params->scalar_bitcast.exp_bias; 30 const float vscale_to_inf = params->scalar_bitcast.scale_to_inf; 31 const uint32_t vexpw_max = params->scalar_bitcast.expw_max; 32 const float vscale_to_zero = params->scalar_bitcast.scale_to_zero; 33 const uint32_t vbias_min = params->scalar_bitcast.bias_min; 34 const uint16_t vexph_mask = params->scalar_bitcast.exph_mask; 35 const uint16_t vmanth_mask = params->scalar_bitcast.manth_mask; 36 const uint16_t vnanh = params->scalar_bitcast.nanh; 37 38 const uint32_t* i = (const uint32_t*) input; 39 uint16_t* o = (uint16_t*) output; 40 do { 41 const uint32_t vw = *i++; 42 43 const uint32_t vnonsignw = vw & vnonsign_mask; 44 45 float vf = uint32_as_float(vnonsignw); 46 const uint32_t vsignw = vw ^ vnonsignw; 47 uint32_t vbias = vnonsignw + vexp_bias; 48 49 vf *= vscale_to_inf; 50 vbias &= vexpw_max; 51 52 vf *= vscale_to_zero; 53 vbias = math_max_u32(vbias, vbias_min); 54 55 vf += uint32_as_float(vbias); 56 57 const uint32_t vbits = float_as_uint32(vf); 58 59 const uint16_t vexph = (uint16_t) (vbits >> 13) & vexph_mask; 60 const uint16_t vmanth = (uint16_t) vbits & vmanth_mask; 61 const uint16_t vsignh = (uint16_t) (vsignw >> 16); 62 63 uint16_t vh = vexph + vmanth; 64 if XNN_UNPREDICTABLE(vnonsignw > vexpw_max) { 65 vh = vnanh; 66 } 67 vh |= vsignh; 68 69 *o++ = vh; 70 71 n -= sizeof(float); 72 } while (n != 0); 73 } 74