soft float support

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1332 c046a42c-6fe2-441c-8c8c-71466251a162

1 files changed, 312 insertions, 0 deletions

diff --git a/fpu/softfloat-native.h b/fpu/softfloat-native.h
new file mode 100644
index 000000000..709df51bc
--- /dev/null
+++ b/fpu/softfloat-native.h
@@ -0,0 +1,312 @@
+/* Native implementation of soft float functions */
+#include <math.h>
+#if defined(_BSD) && !defined(__APPLE__)
+#include <ieeefp.h>
+#else
+#include <fenv.h>
+#endif
+
+typedef float float32;
+typedef double float64;
+#ifdef FLOATX80
+typedef long double floatx80;
+#endif
+
+typedef union {
+    float32 f;
+    uint32_t i;
+} float32u;
+typedef union {
+    float64 f;
+    uint64_t i;
+} float64u;
+#ifdef FLOATX80
+typedef union {
+    floatx80 f;
+    struct {
+        uint64_t low;
+        uint16_t high;
+    } i;
+} floatx80u;
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE floating-point rounding mode.
+*----------------------------------------------------------------------------*/
+#if defined(_BSD) && !defined(__APPLE__)
+enum {
+    float_round_nearest_even = FP_RN,
+    float_round_down         = FE_RM,
+    float_round_up           = FE_RP,
+    float_round_to_zero      = FE_RZ
+};
+#elif defined(__arm__)
+enum {
+    float_round_nearest_even = 0,
+    float_round_down         = 1,
+    float_round_up           = 2,
+    float_round_to_zero      = 3
+};
+#else
+enum {
+    float_round_nearest_even = FE_TONEAREST,
+    float_round_down         = FE_DOWNWARD,
+    float_round_up           = FE_UPWARD,
+    float_round_to_zero      = FE_TOWARDZERO
+};
+#endif
+
+typedef struct float_status {
+    signed char float_rounding_mode;
+#ifdef FLOATX80
+    signed char floatx80_rounding_precision;
+#endif
+} float_status;
+
+void set_float_rounding_mode(int val STATUS_PARAM);
+#ifdef FLOATX80
+void set_floatx80_rounding_precision(int val STATUS_PARAM);
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE integer-to-floating-point conversion routines.
+*----------------------------------------------------------------------------*/
+float32 int32_to_float32( int STATUS_PARAM);
+float64 int32_to_float64( int STATUS_PARAM);
+#ifdef FLOATX80
+floatx80 int32_to_floatx80( int STATUS_PARAM);
+#endif
+#ifdef FLOAT128
+float128 int32_to_float128( int STATUS_PARAM);
+#endif
+float32 int64_to_float32( int64_t STATUS_PARAM);
+float64 int64_to_float64( int64_t STATUS_PARAM);
+#ifdef FLOATX80
+floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
+#endif
+#ifdef FLOAT128
+float128 int64_to_float128( int64_t STATUS_PARAM);
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE single-precision conversion routines.
+*----------------------------------------------------------------------------*/
+int float32_to_int32( float32  STATUS_PARAM);
+int float32_to_int32_round_to_zero( float32  STATUS_PARAM);
+int64_t float32_to_int64( float32  STATUS_PARAM);
+int64_t float32_to_int64_round_to_zero( float32  STATUS_PARAM);
+float64 float32_to_float64( float32  STATUS_PARAM);
+#ifdef FLOATX80
+floatx80 float32_to_floatx80( float32  STATUS_PARAM);
+#endif
+#ifdef FLOAT128
+float128 float32_to_float128( float32  STATUS_PARAM);
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE single-precision operations.
+*----------------------------------------------------------------------------*/
+float32 float32_round_to_int( float32  STATUS_PARAM);
+INLINE float32 float32_add( float32 a, float32 b STATUS_PARAM)
+{
+    return a + b;
+}
+INLINE float32 float32_sub( float32 a, float32 b STATUS_PARAM)
+{
+    return a - b;
+}
+INLINE float32 float32_mul( float32 a, float32 b STATUS_PARAM)
+{
+    return a * b;
+}
+INLINE float32 float32_div( float32 a, float32 b STATUS_PARAM)
+{
+    return a / b;
+}
+float32 float32_rem( float32, float32  STATUS_PARAM);
+float32 float32_sqrt( float32  STATUS_PARAM);
+INLINE char float32_eq( float32 a, float32 b STATUS_PARAM)
+{
+    /* XXX: incorrect because it can raise an exception */
+    return a == b;
+}
+INLINE char float32_le( float32 a, float32 b STATUS_PARAM)
+{
+    return a <= b;
+}
+INLINE char float32_lt( float32 a, float32 b STATUS_PARAM)
+{
+    return a < b;
+}
+INLINE char float32_eq_signaling( float32 a, float32 b STATUS_PARAM)
+{
+    return a == b;
+}
+INLINE char float32_le_quiet( float32 a, float32 b STATUS_PARAM)
+{
+    return islessequal(a, b);
+}
+INLINE char float32_lt_quiet( float32 a, float32 b STATUS_PARAM)
+{
+    return isless(a, b);
+}
+char float32_is_signaling_nan( float32 );
+
+INLINE float32 float32_abs(float32 a)
+{
+    return fabsf(a);
+}
+
+INLINE float32 float32_chs(float32 a)
+{
+    return -a;
+}
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE double-precision conversion routines.
+*----------------------------------------------------------------------------*/
+int float64_to_int32( float64 STATUS_PARAM );
+int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
+int64_t float64_to_int64( float64 STATUS_PARAM );
+int64_t float64_to_int64_round_to_zero( float64 STATUS_PARAM );
+float32 float64_to_float32( float64 STATUS_PARAM );
+#ifdef FLOATX80
+floatx80 float64_to_floatx80( float64 STATUS_PARAM );
+#endif
+#ifdef FLOAT128
+float128 float64_to_float128( float64 STATUS_PARAM );
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE double-precision operations.
+*----------------------------------------------------------------------------*/
+float64 float64_round_to_int( float64 STATUS_PARAM );
+INLINE float64 float64_add( float64 a, float64 b STATUS_PARAM)
+{
+    return a + b;
+}
+INLINE float64 float64_sub( float64 a, float64 b STATUS_PARAM)
+{
+    return a - b;
+}
+INLINE float64 float64_mul( float64 a, float64 b STATUS_PARAM)
+{
+    return a * b;
+}
+INLINE float64 float64_div( float64 a, float64 b STATUS_PARAM)
+{
+    return a / b;
+}
+float64 float64_rem( float64, float64 STATUS_PARAM );
+float64 float64_sqrt( float64 STATUS_PARAM );
+INLINE char float64_eq( float64 a, float64 b STATUS_PARAM)
+{
+    return a == b;
+}
+INLINE char float64_le( float64 a, float64 b STATUS_PARAM)
+{
+    return a <= b;
+}
+INLINE char float64_lt( float64 a, float64 b STATUS_PARAM)
+{
+    return a < b;
+}
+INLINE char float64_eq_signaling( float64 a, float64 b STATUS_PARAM)
+{
+    return a == b;
+}
+INLINE char float64_le_quiet( float64 a, float64 b STATUS_PARAM)
+{
+    return islessequal(a, b);
+}
+INLINE char float64_lt_quiet( float64 a, float64 b STATUS_PARAM)
+{
+    return isless(a, b);
+
+}
+char float64_is_signaling_nan( float64 );
+
+INLINE float64 float64_abs(float64 a)
+{
+    return fabs(a);
+}
+
+INLINE float64 float64_chs(float64 a)
+{
+    return -a;
+}
+
+#ifdef FLOATX80
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE extended double-precision conversion routines.
+*----------------------------------------------------------------------------*/
+int floatx80_to_int32( floatx80 STATUS_PARAM );
+int floatx80_to_int32_round_to_zero( floatx80 STATUS_PARAM );
+int64_t floatx80_to_int64( floatx80 STATUS_PARAM);
+int64_t floatx80_to_int64_round_to_zero( floatx80 STATUS_PARAM);
+float32 floatx80_to_float32( floatx80 STATUS_PARAM );
+float64 floatx80_to_float64( floatx80 STATUS_PARAM );
+#ifdef FLOAT128
+float128 floatx80_to_float128( floatx80 STATUS_PARAM );
+#endif
+
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE extended double-precision operations.
+*----------------------------------------------------------------------------*/
+floatx80 floatx80_round_to_int( floatx80 STATUS_PARAM );
+INLINE floatx80 floatx80_add( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a + b;
+}
+INLINE floatx80 floatx80_sub( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a - b;
+}
+INLINE floatx80 floatx80_mul( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a * b;
+}
+INLINE floatx80 floatx80_div( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a / b;
+}
+floatx80 floatx80_rem( floatx80, floatx80 STATUS_PARAM );
+floatx80 floatx80_sqrt( floatx80 STATUS_PARAM );
+INLINE char floatx80_eq( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a == b;
+}
+INLINE char floatx80_le( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a <= b;
+}
+INLINE char floatx80_lt( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a < b;
+}
+INLINE char floatx80_eq_signaling( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return a == b;
+}
+INLINE char floatx80_le_quiet( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return islessequal(a, b);
+}
+INLINE char floatx80_lt_quiet( floatx80 a, floatx80 b STATUS_PARAM)
+{
+    return isless(a, b);
+
+}
+char floatx80_is_signaling_nan( floatx80 );
+
+INLINE floatx80 floatx80_abs(floatx80 a)
+{
+    return fabsl(a);
+}
+
+INLINE floatx80 floatx80_chs(floatx80 a)
+{
+    return -a;
+}
+#endif