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// See LICENSE.SoftFloat for license details.
#include <stdbool.h>
#include <stdint.h>
#include "platform.h"
#include "internals.h"
#include "specialize.h"
#include "softfloat.h"
float32_t f32_div( float32_t a, float32_t b )
{
union ui32_f32 uA;
uint_fast32_t uiA;
bool signA;
int_fast16_t expA;
uint_fast32_t sigA;
union ui32_f32 uB;
uint_fast32_t uiB;
bool signB;
int_fast16_t expB;
uint_fast32_t sigB;
bool signZ;
struct exp16_sig32 normExpSig;
int_fast16_t expZ;
uint_fast32_t sigZ;
uint_fast32_t uiZ;
union ui32_f32 uZ;
uA.f = a;
uiA = uA.ui;
signA = signF32UI( uiA );
expA = expF32UI( uiA );
sigA = fracF32UI( uiA );
uB.f = b;
uiB = uB.ui;
signB = signF32UI( uiB );
expB = expF32UI( uiB );
sigB = fracF32UI( uiB );
signZ = signA ^ signB;
if ( expA == 0xFF ) {
if ( sigA ) goto propagateNaN;
if ( expB == 0xFF ) {
if ( sigB ) goto propagateNaN;
goto invalid;
}
goto infinity;
}
if ( expB == 0xFF ) {
if ( sigB ) goto propagateNaN;
goto zero;
}
if ( ! expB ) {
if ( ! sigB ) {
if ( ! ( expA | sigA ) ) goto invalid;
softfloat_raiseFlags( softfloat_flag_infinity );
goto infinity;
}
normExpSig = softfloat_normSubnormalF32Sig( sigB );
expB = normExpSig.exp;
sigB = normExpSig.sig;
}
if ( ! expA ) {
if ( ! sigA ) goto zero;
normExpSig = softfloat_normSubnormalF32Sig( sigA );
expA = normExpSig.exp;
sigA = normExpSig.sig;
}
expZ = expA - expB + 0x7D;
sigA = ( sigA | 0x00800000 )<<7;
sigB = ( sigB | 0x00800000 )<<8;
if ( sigB <= ( sigA + sigA ) ) {
++expZ;
sigA >>= 1;
}
sigZ = ( (uint_fast64_t) sigA<<32 ) / sigB;
if ( ! ( sigZ & 0x3F ) ) {
sigZ |= ( (uint_fast64_t) sigB * sigZ != (uint_fast64_t) sigA<<32 );
}
return softfloat_roundPackToF32( signZ, expZ, sigZ );
propagateNaN:
uiZ = softfloat_propagateNaNF32UI( uiA, uiB );
goto uiZ;
invalid:
softfloat_raiseFlags( softfloat_flag_invalid );
uiZ = defaultNaNF32UI;
goto uiZ;
infinity:
uiZ = packToF32UI( signZ, 0xFF, 0 );
goto uiZ;
zero:
uiZ = packToF32UI( signZ, 0, 0 );
uiZ:
uZ.ui = uiZ;
return uZ.f;
}
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