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-rw-r--r--fpu/softfloat-native.c368
1 files changed, 368 insertions, 0 deletions
diff --git a/fpu/softfloat-native.c b/fpu/softfloat-native.c
new file mode 100644
index 0000000..bbdb3d6
--- /dev/null
+++ b/fpu/softfloat-native.c
@@ -0,0 +1,368 @@
+/* Native implementation of soft float functions. Only a single status
+ context is supported */
+#include "softfloat.h"
+#include <math.h>
+
+void set_float_rounding_mode(int val STATUS_PARAM)
+{
+ STATUS(float_rounding_mode) = val;
+#if defined(_BSD) && !defined(__APPLE__) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10)
+ fpsetround(val);
+#elif defined(__arm__)
+ /* nothing to do */
+#else
+ fesetround(val);
+#endif
+}
+
+#ifdef FLOATX80
+void set_floatx80_rounding_precision(int val STATUS_PARAM)
+{
+ STATUS(floatx80_rounding_precision) = val;
+}
+#endif
+
+#if defined(_BSD) || (defined(HOST_SOLARIS) && HOST_SOLARIS < 10)
+#define lrint(d) ((int32_t)rint(d))
+#define llrint(d) ((int64_t)rint(d))
+#define lrintf(f) ((int32_t)rint(f))
+#define llrintf(f) ((int64_t)rint(f))
+#define sqrtf(f) ((float)sqrt(f))
+#define remainderf(fa, fb) ((float)remainder(fa, fb))
+#define rintf(f) ((float)rint(f))
+#endif
+
+#if defined(__powerpc__)
+
+/* correct (but slow) PowerPC rint() (glibc version is incorrect) */
+double qemu_rint(double x)
+{
+ double y = 4503599627370496.0;
+ if (fabs(x) >= y)
+ return x;
+ if (x < 0)
+ y = -y;
+ y = (x + y) - y;
+ if (y == 0.0)
+ y = copysign(y, x);
+ return y;
+}
+
+#define rint qemu_rint
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE integer-to-floating-point conversion routines.
+*----------------------------------------------------------------------------*/
+float32 int32_to_float32(int v STATUS_PARAM)
+{
+ return (float32)v;
+}
+
+float64 int32_to_float64(int v STATUS_PARAM)
+{
+ return (float64)v;
+}
+
+#ifdef FLOATX80
+floatx80 int32_to_floatx80(int v STATUS_PARAM)
+{
+ return (floatx80)v;
+}
+#endif
+float32 int64_to_float32( int64_t v STATUS_PARAM)
+{
+ return (float32)v;
+}
+float64 int64_to_float64( int64_t v STATUS_PARAM)
+{
+ return (float64)v;
+}
+#ifdef FLOATX80
+floatx80 int64_to_floatx80( int64_t v STATUS_PARAM)
+{
+ return (floatx80)v;
+}
+#endif
+
+/* XXX: this code implements the x86 behaviour, not the IEEE one. */
+#if HOST_LONG_BITS == 32
+static inline int long_to_int32(long a)
+{
+ return a;
+}
+#else
+static inline int long_to_int32(long a)
+{
+ if (a != (int32_t)a)
+ a = 0x80000000;
+ return a;
+}
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE single-precision conversion routines.
+*----------------------------------------------------------------------------*/
+int float32_to_int32( float32 a STATUS_PARAM)
+{
+ return long_to_int32(lrintf(a));
+}
+int float32_to_int32_round_to_zero( float32 a STATUS_PARAM)
+{
+ return (int)a;
+}
+int64_t float32_to_int64( float32 a STATUS_PARAM)
+{
+ return llrintf(a);
+}
+
+int64_t float32_to_int64_round_to_zero( float32 a STATUS_PARAM)
+{
+ return (int64_t)a;
+}
+
+float64 float32_to_float64( float32 a STATUS_PARAM)
+{
+ return a;
+}
+#ifdef FLOATX80
+floatx80 float32_to_floatx80( float32 a STATUS_PARAM)
+{
+ return a;
+}
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE single-precision operations.
+*----------------------------------------------------------------------------*/
+float32 float32_round_to_int( float32 a STATUS_PARAM)
+{
+ return rintf(a);
+}
+
+float32 float32_rem( float32 a, float32 b STATUS_PARAM)
+{
+ return remainderf(a, b);
+}
+
+float32 float32_sqrt( float32 a STATUS_PARAM)
+{
+ return sqrtf(a);
+}
+char float32_compare( float32 a, float32 b STATUS_PARAM )
+{
+ if (a < b) {
+ return -1;
+ } else if (a == b) {
+ return 0;
+ } else if (a > b) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+char float32_compare_quiet( float32 a, float32 b STATUS_PARAM )
+{
+ if (isless(a, b)) {
+ return -1;
+ } else if (a == b) {
+ return 0;
+ } else if (isgreater(a, b)) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+char float32_is_signaling_nan( float32 a1)
+{
+ float32u u;
+ uint32_t a;
+ u.f = a1;
+ a = u.i;
+ return ( ( ( a>>22 ) & 0x1FF ) == 0x1FE ) && ( a & 0x003FFFFF );
+}
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE double-precision conversion routines.
+*----------------------------------------------------------------------------*/
+int float64_to_int32( float64 a STATUS_PARAM)
+{
+ return long_to_int32(lrint(a));
+}
+int float64_to_int32_round_to_zero( float64 a STATUS_PARAM)
+{
+ return (int)a;
+}
+int64_t float64_to_int64( float64 a STATUS_PARAM)
+{
+ return llrint(a);
+}
+int64_t float64_to_int64_round_to_zero( float64 a STATUS_PARAM)
+{
+ return (int64_t)a;
+}
+float32 float64_to_float32( float64 a STATUS_PARAM)
+{
+ return a;
+}
+#ifdef FLOATX80
+floatx80 float64_to_floatx80( float64 a STATUS_PARAM)
+{
+ return a;
+}
+#endif
+#ifdef FLOAT128
+float128 float64_to_float128( float64 a STATUS_PARAM)
+{
+ return a;
+}
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE double-precision operations.
+*----------------------------------------------------------------------------*/
+float64 float64_round_to_int( float64 a STATUS_PARAM )
+{
+#if defined(__arm__)
+ switch(STATUS(float_rounding_mode)) {
+ default:
+ case float_round_nearest_even:
+ asm("rndd %0, %1" : "=f" (a) : "f"(a));
+ break;
+ case float_round_down:
+ asm("rnddm %0, %1" : "=f" (a) : "f"(a));
+ break;
+ case float_round_up:
+ asm("rnddp %0, %1" : "=f" (a) : "f"(a));
+ break;
+ case float_round_to_zero:
+ asm("rnddz %0, %1" : "=f" (a) : "f"(a));
+ break;
+ }
+#else
+ return rint(a);
+#endif
+}
+
+float64 float64_rem( float64 a, float64 b STATUS_PARAM)
+{
+ return remainder(a, b);
+}
+
+float64 float64_sqrt( float64 a STATUS_PARAM)
+{
+ return sqrt(a);
+}
+char float64_compare( float64 a, float64 b STATUS_PARAM )
+{
+ if (a < b) {
+ return -1;
+ } else if (a == b) {
+ return 0;
+ } else if (a > b) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+char float64_compare_quiet( float64 a, float64 b STATUS_PARAM )
+{
+ if (isless(a, b)) {
+ return -1;
+ } else if (a == b) {
+ return 0;
+ } else if (isgreater(a, b)) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+char float64_is_signaling_nan( float64 a1)
+{
+ float64u u;
+ uint64_t a;
+ u.f = a1;
+ a = u.i;
+ return
+ ( ( ( a>>51 ) & 0xFFF ) == 0xFFE )
+ && ( a & LIT64( 0x0007FFFFFFFFFFFF ) );
+
+}
+
+#ifdef FLOATX80
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE extended double-precision conversion routines.
+*----------------------------------------------------------------------------*/
+int floatx80_to_int32( floatx80 a STATUS_PARAM)
+{
+ return long_to_int32(lrintl(a));
+}
+int floatx80_to_int32_round_to_zero( floatx80 a STATUS_PARAM)
+{
+ return (int)a;
+}
+int64_t floatx80_to_int64( floatx80 a STATUS_PARAM)
+{
+ return llrintl(a);
+}
+int64_t floatx80_to_int64_round_to_zero( floatx80 a STATUS_PARAM)
+{
+ return (int64_t)a;
+}
+float32 floatx80_to_float32( floatx80 a STATUS_PARAM)
+{
+ return a;
+}
+float64 floatx80_to_float64( floatx80 a STATUS_PARAM)
+{
+ return a;
+}
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE extended double-precision operations.
+*----------------------------------------------------------------------------*/
+floatx80 floatx80_round_to_int( floatx80 a STATUS_PARAM)
+{
+ return rintl(a);
+}
+floatx80 floatx80_rem( floatx80 a, floatx80 b STATUS_PARAM)
+{
+ return remainderl(a, b);
+}
+floatx80 floatx80_sqrt( floatx80 a STATUS_PARAM)
+{
+ return sqrtl(a);
+}
+char floatx80_compare( floatx80 a, floatx80 b STATUS_PARAM )
+{
+ if (a < b) {
+ return -1;
+ } else if (a == b) {
+ return 0;
+ } else if (a > b) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+char floatx80_compare_quiet( floatx80 a, floatx80 b STATUS_PARAM )
+{
+ if (isless(a, b)) {
+ return -1;
+ } else if (a == b) {
+ return 0;
+ } else if (isgreater(a, b)) {
+ return 1;
+ } else {
+ return 2;
+ }
+}
+char floatx80_is_signaling_nan( floatx80 a1)
+{
+ floatx80u u;
+ u.f = a1;
+ return ( ( u.i.high & 0x7FFF ) == 0x7FFF ) && (bits64) ( u.i.low<<1 );
+}
+
+#endif
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