72 lines
1.2 KiB
Bash
72 lines
1.2 KiB
Bash
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#!/bin/sh
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halfToFloat() {
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local s=$1 e=$2 m=$3
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if [ $e -eq 0 ]; then
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if [ $m -eq 0 ]; then
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# Plus or minus zero
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echo $((s << 31))
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return
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else
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# Denormalized number -- renormalize it
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while [ $((m & 0x400)) -eq 0 ]; do
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m=$((m << 1))
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e=$((e - 1))
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done
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e=$((e + 1))
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m=$((m & 0x3ff))
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fi
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elif [ $e -eq 31 ]; then
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if [ "$m" -eq 0 ]; then
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# Positive or negative infinity
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echo $(((s << 31) | 0x7f800000))
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return
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else
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# Nan - preserve sign and significand bits
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echo $(((s << 31) | 0x7f800000 | (m << 13)))
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return
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fi
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fi
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# Normalized number
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e=$((e + (127 - 15)))
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m=$((m << 13))
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# Assemble s, e and m
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echo $(((s << 31) | (e << 23) | m))
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}
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echo "//"
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echo "// This is an automatically generated file."
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echo "// Do not edit."
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echo "//"
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echo ""
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echo "{"
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echo -n " "
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s=0
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m=0
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e=0
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j=0
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k=0
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while [ $s -lt 2 ]; do
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while [ $e -lt 32 ]; do
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while [ $m -lt 1024 ]; do
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out="$(halfToFloat $s $e $m)"
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printf "{0x%08x}, " $out
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m=$((m + 1))
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j=$((j + 1))
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if [ $j -eq 4 ]; then
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printf "\n"
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k=$((k + 1))
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[ $k -lt 16384 ] && printf " "
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j=0
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fi
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done
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m=0
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e=$((e + 1))
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done
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e=0
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s=$((s + 1))
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done
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echo "};"
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