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Diffstat (limited to 'softfloat/SoftFloat-3/source/f64_div.c')
-rwxr-xr-xsoftfloat/SoftFloat-3/source/f64_div.c104
1 files changed, 104 insertions, 0 deletions
diff --git a/softfloat/SoftFloat-3/source/f64_div.c b/softfloat/SoftFloat-3/source/f64_div.c
new file mode 100755
index 0000000..9bc72b3
--- /dev/null
+++ b/softfloat/SoftFloat-3/source/f64_div.c
@@ -0,0 +1,104 @@
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "primitives.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+float64_t f64_div( float64_t a, float64_t b )
+{
+ union ui64_f64 uA;
+ uint_fast64_t uiA;
+ bool signA;
+ int_fast16_t expA;
+ uint_fast64_t sigA;
+ union ui64_f64 uB;
+ uint_fast64_t uiB;
+ bool signB;
+ int_fast16_t expB;
+ uint_fast64_t sigB;
+ bool signZ;
+ struct exp16_sig64 normExpSig;
+ int_fast16_t expZ;
+ uint_fast64_t sigZ;
+ struct uint128 term, rem;
+ uint_fast64_t uiZ;
+ union ui64_f64 uZ;
+
+ uA.f = a;
+ uiA = uA.ui;
+ signA = signF64UI( uiA );
+ expA = expF64UI( uiA );
+ sigA = fracF64UI( uiA );
+ uB.f = b;
+ uiB = uB.ui;
+ signB = signF64UI( uiB );
+ expB = expF64UI( uiB );
+ sigB = fracF64UI( uiB );
+ signZ = signA ^ signB;
+ if ( expA == 0x7FF ) {
+ if ( sigA ) goto propagateNaN;
+ if ( expB == 0x7FF ) {
+ if ( sigB ) goto propagateNaN;
+ goto invalid;
+ }
+ goto infinity;
+ }
+ if ( expB == 0x7FF ) {
+ if ( sigB ) goto propagateNaN;
+ goto zero;
+ }
+ if ( ! expB ) {
+ if ( ! sigB ) {
+ if ( ! ( expA | sigA ) ) goto invalid;
+ softfloat_raiseFlags( softfloat_flag_infinity );
+ goto infinity;
+ }
+ normExpSig = softfloat_normSubnormalF64Sig( sigB );
+ expB = normExpSig.exp;
+ sigB = normExpSig.sig;
+ }
+ if ( ! expA ) {
+ if ( ! sigA ) goto zero;
+ normExpSig = softfloat_normSubnormalF64Sig( sigA );
+ expA = normExpSig.exp;
+ sigA = normExpSig.sig;
+ }
+ expZ = expA - expB + 0x3FD;
+ sigA = ( sigA | UINT64_C( 0x0010000000000000 ) )<<10;
+ sigB = ( sigB | UINT64_C( 0x0010000000000000 ) )<<11;
+ if ( sigB <= ( sigA + sigA ) ) {
+ ++expZ;
+ sigA >>= 1;
+ }
+ sigZ = softfloat_estimateDiv128To64( sigA, 0, sigB );
+ if ( ( sigZ & 0x1FF ) <= 2 ) {
+ term = softfloat_mul64To128( sigB, sigZ );
+ rem = softfloat_sub128( sigA, 0, term.v64, term.v0 );
+ while ( UINT64_C( 0x8000000000000000 ) <= rem.v64 ) {
+ --sigZ;
+ rem = softfloat_add128( rem.v64, rem.v0, 0, sigB );
+ }
+ sigZ |= ( rem.v0 != 0 );
+ }
+ return softfloat_roundPackToF64( signZ, expZ, sigZ );
+ propagateNaN:
+ uiZ = softfloat_propagateNaNF64UI( uiA, uiB );
+ goto uiZ;
+ invalid:
+ softfloat_raiseFlags( softfloat_flag_invalid );
+ uiZ = defaultNaNF64UI;
+ goto uiZ;
+ infinity:
+ uiZ = packToF64UI( signZ, 0x7FF, 0 );
+ goto uiZ;
+ zero:
+ uiZ = packToF64UI( signZ, 0, 0 );
+ uiZ:
+ uZ.ui = uiZ;
+ return uZ.f;
+
+}
+