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 #include <fp16.h> 17 18 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)])19void xnn_f32_f16_vcvt_ukernel__scalar_bitcast_x1( 20 size_t n, 21 const float* input, 22 void* output, 23 const union xnn_f32_f16_cvt_params params[restrict XNN_MIN_ELEMENTS(1)]) 24 { 25 assert(n != 0); 26 assert(n % sizeof(float) == 0); 27 assert(input != NULL); 28 assert(output != NULL); 29 30 const uint32_t vnonsign_mask = params->scalar_bitcast.nonsign_mask; 31 const uint32_t vexp_bias = params->scalar_bitcast.exp_bias; 32 const float vscale_to_inf = params->scalar_bitcast.scale_to_inf; 33 const uint32_t vexpw_max = params->scalar_bitcast.expw_max; 34 const float vscale_to_zero = params->scalar_bitcast.scale_to_zero; 35 const uint32_t vbias_min = params->scalar_bitcast.bias_min; 36 const uint16_t vexph_mask = params->scalar_bitcast.exph_mask; 37 const uint16_t vmanth_mask = params->scalar_bitcast.manth_mask; 38 const uint16_t vnanh = params->scalar_bitcast.nanh; 39 40 const uint32_t* i = (const uint32_t*) input; 41 uint16_t* o = (uint16_t*) output; 42 do { 43 const uint32_t vw = *i++; 44 45 const uint32_t vnonsignw = vw & vnonsign_mask; 46 47 float vf = fp32_from_bits(vnonsignw); 48 const uint32_t vsignw = vw ^ vnonsignw; 49 uint32_t vbias = vnonsignw + vexp_bias; 50 51 vf *= vscale_to_inf; 52 vbias &= vexpw_max; 53 54 vf *= vscale_to_zero; 55 vbias = math_max_u32(vbias, vbias_min); 56 57 vf += fp32_from_bits(vbias); 58 59 const uint32_t vbits = fp32_to_bits(vf); 60 61 const uint16_t vexph = (uint16_t) (vbits >> 13) & vexph_mask; 62 const uint16_t vmanth = (uint16_t) vbits & vmanth_mask; 63 const uint16_t vsignh = (uint16_t) (vsignw >> 16); 64 65 uint16_t vh = vexph + vmanth; 66 if XNN_UNPREDICTABLE(vnonsignw > vexpw_max) { 67 vh = vnanh; 68 } 69 vh |= vsignh; 70 71 *o++ = vh; 72 73 n -= sizeof(float); 74 } while (n != 0); 75 } 76