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authorAndrew Waterman <waterman@s141.Millennium.Berkeley.EDU>2011-06-19 21:45:58 -0700
committerAndrew Waterman <waterman@s141.Millennium.Berkeley.EDU>2011-06-19 21:45:58 -0700
commit1e163c715550e20e239976a22e00869884713e54 (patch)
treedbcf7b10e35421c72758df098057014fef7ffff7 /softfloat/f32_roundToInt.c
parent0edaecc54329048eb91ad6a45338265ef1a4569c (diff)
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fixed build after repo split
Diffstat (limited to 'softfloat/f32_roundToInt.c')
-rwxr-xr-xsoftfloat/f32_roundToInt.c78
1 files changed, 78 insertions, 0 deletions
diff --git a/softfloat/f32_roundToInt.c b/softfloat/f32_roundToInt.c
new file mode 100755
index 0000000..f8f9114
--- /dev/null
+++ b/softfloat/f32_roundToInt.c
@@ -0,0 +1,78 @@
+
+#include <stdbool.h>
+#include <stdint.h>
+#include "platform.h"
+#include "internals.h"
+#include "specialize.h"
+#include "softfloat.h"
+
+float32_t f32_roundToInt( float32_t a, int_fast8_t roundingMode, bool exact )
+{
+ union ui32_f32 uA;
+ uint_fast32_t uiA;
+ int_fast16_t expA;
+ uint_fast32_t uiZ;
+ bool signA;
+ uint_fast32_t lastBitMask, roundBitsMask;
+ union ui32_f32 uZ;
+
+ uA.f = a;
+ uiA = uA.ui;
+ expA = expF32UI( uiA );
+ if ( 0x96 <= expA ) {
+ if ( ( expA == 0xFF ) && fracF32UI( uiA ) ) {
+ uiZ = softfloat_propagateNaNF32UI( uiA, 0 );
+ goto uiZ;
+ }
+ return a;
+ }
+ if ( expA <= 0x7E ) {
+ if ( ! (uint32_t) ( uiA<<1 ) ) return a;
+ if ( exact ) softfloat_exceptionFlags |= softfloat_flag_inexact;
+ signA = signF32UI( uiA );
+ switch ( roundingMode ) {
+ case softfloat_round_nearest_even:
+ if ( ( expA == 0x7E ) && fracF32UI( uiA ) ) {
+ uiZ = packToF32UI( signA, 0x7F, 0 );
+ goto uiZ;
+ }
+ break;
+ case softfloat_round_min:
+ uiZ = signA ? 0xBF800000 : 0;
+ goto uiZ;
+ case softfloat_round_max:
+ uiZ = signA ? 0x80000000 : 0x3F800000;
+ goto uiZ;
+ case softfloat_round_nearest_maxMag:
+ if ( expA == 0x7E ) {
+ uiZ = packToF32UI( signA, 0x7F, 0 );
+ goto uiZ;
+ }
+ break;
+ }
+ uiZ = packToF32UI( signA, 0, 0 );
+ goto uiZ;
+ }
+ lastBitMask = (uint_fast32_t) 1<<( 0x96 - expA );
+ roundBitsMask = lastBitMask - 1;
+ uiZ = uiA;
+ if ( roundingMode == softfloat_round_nearest_maxMag ) {
+ uiZ += lastBitMask>>1;
+ } else if ( roundingMode == softfloat_round_nearest_even ) {
+ uiZ += lastBitMask>>1;
+ if ( ! ( uiZ & roundBitsMask ) ) uiZ &= ~ lastBitMask;
+ } else if ( roundingMode != softfloat_round_minMag ) {
+ if ( signF32UI( uiZ ) ^ ( roundingMode == softfloat_round_max ) ) {
+ uiZ += roundBitsMask;
+ }
+ }
+ uiZ &= ~ roundBitsMask;
+ if ( exact && ( uiZ != uiA ) ) {
+ softfloat_exceptionFlags |= softfloat_flag_inexact;
+ }
+ uiZ:
+ uZ.ui = uiZ;
+ return uZ.f;
+
+}
+