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authorbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-03-13 18:52:29 +0000
committerbellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>2005-03-13 18:52:29 +0000
commit1d6bda356153c82e100680d9f2165e32c8fb1330 (patch)
tree8dbccee8fa54e0cd50da33c983192b69f0c10741 /fpu
parent53cd6637924a83481038b2266c59dc1e1ff7bb11 (diff)
added abs, chs and compare functions
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1338 c046a42c-6fe2-441c-8c8c-71466251a162
Diffstat (limited to 'fpu')
-rw-r--r--fpu/softfloat.c135
-rw-r--r--fpu/softfloat.h69
2 files changed, 204 insertions, 0 deletions
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index ad57fd9e16..5e846200ae 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -54,6 +54,11 @@ void set_float_rounding_mode(int val STATUS_PARAM)
STATUS(float_rounding_mode) = val;
}
+void set_float_exception_flags(int val STATUS_PARAM)
+{
+ STATUS(float_exception_flags) = val;
+}
+
#ifdef FLOATX80
void set_floatx80_rounding_precision(int val STATUS_PARAM)
{
@@ -5183,3 +5188,133 @@ flag float128_lt_quiet( float128 a, float128 b STATUS_PARAM )
#endif
+/* misc functions */
+float32 uint32_to_float32( unsigned int a STATUS_PARAM )
+{
+ return int64_to_float32(a STATUS_VAR);
+}
+
+float64 uint32_to_float64( unsigned int a STATUS_PARAM )
+{
+ return int64_to_float64(a STATUS_VAR);
+}
+
+unsigned int float32_to_uint32( float32 a STATUS_PARAM )
+{
+ int64_t v;
+ unsigned int res;
+
+ v = float32_to_int64(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else {
+ res = v;
+ }
+ return res;
+}
+
+unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM )
+{
+ int64_t v;
+ unsigned int res;
+
+ v = float32_to_int64_round_to_zero(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else {
+ res = v;
+ }
+ return res;
+}
+
+unsigned int float64_to_uint32( float64 a STATUS_PARAM )
+{
+ int64_t v;
+ unsigned int res;
+
+ v = float64_to_int64(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else {
+ res = v;
+ }
+ return res;
+}
+
+unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM )
+{
+ int64_t v;
+ unsigned int res;
+
+ v = float64_to_int64_round_to_zero(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else {
+ res = v;
+ }
+ return res;
+}
+
+#define COMPARE(s, nan_exp) \
+INLINE char float ## s ## _compare_internal( float ## s a, float ## s b, \
+ int is_quiet STATUS_PARAM ) \
+{ \
+ flag aSign, bSign; \
+ \
+ if (( ( extractFloat ## s ## Exp( a ) == nan_exp ) && \
+ extractFloat ## s ## Frac( a ) ) || \
+ ( ( extractFloat ## s ## Exp( b ) == nan_exp ) && \
+ extractFloat ## s ## Frac( b ) )) { \
+ if (!is_quiet || \
+ float ## s ## _is_signaling_nan( a ) || \
+ float ## s ## _is_signaling_nan( b ) ) { \
+ float_raise( float_flag_invalid STATUS_VAR); \
+ } \
+ return float_relation_unordered; \
+ } \
+ aSign = extractFloat ## s ## Sign( a ); \
+ bSign = extractFloat ## s ## Sign( b ); \
+ if ( aSign != bSign ) { \
+ if ( (bits ## s) ( ( a | b )<<1 ) == 0 ) { \
+ /* zero case */ \
+ return float_relation_equal; \
+ } else { \
+ return 1 - (2 * aSign); \
+ } \
+ } else { \
+ if (a == b) { \
+ return float_relation_equal; \
+ } else { \
+ return 1 - 2 * (aSign ^ ( a < b )); \
+ } \
+ } \
+} \
+ \
+char float ## s ## _compare( float ## s a, float ## s b STATUS_PARAM ) \
+{ \
+ return float ## s ## _compare_internal(a, b, 0 STATUS_VAR); \
+} \
+ \
+char float ## s ## _compare_quiet( float ## s a, float ## s b STATUS_PARAM ) \
+{ \
+ return float ## s ## _compare_internal(a, b, 1 STATUS_VAR); \
+}
+
+COMPARE(32, 0xff)
+COMPARE(64, 0x7ff)
diff --git a/fpu/softfloat.h b/fpu/softfloat.h
index 9aefbf75ac..666d6a017f 100644
--- a/fpu/softfloat.h
+++ b/fpu/softfloat.h
@@ -93,6 +93,16 @@ typedef int64_t sbits64;
#define STATUS(field) status->field
#define STATUS_VAR , status
+/*----------------------------------------------------------------------------
+| Software IEC/IEEE floating-point ordering relations
+*----------------------------------------------------------------------------*/
+enum {
+ float_relation_less = -1,
+ float_relation_equal = 0,
+ float_relation_greater = 1,
+ float_relation_unordered = 2
+};
+
#ifdef CONFIG_SOFTFLOAT
/*----------------------------------------------------------------------------
| Software IEC/IEEE floating-point types.
@@ -154,6 +164,11 @@ typedef struct float_status {
} float_status;
void set_float_rounding_mode(int val STATUS_PARAM);
+void set_float_exception_flags(int val STATUS_PARAM);
+INLINE int get_float_exception_flags(float_status *status)
+{
+ return STATUS(float_exception_flags);
+}
#ifdef FLOATX80
void set_floatx80_rounding_precision(int val STATUS_PARAM);
#endif
@@ -169,6 +184,8 @@ void float_raise( signed char STATUS_PARAM);
*----------------------------------------------------------------------------*/
float32 int32_to_float32( int STATUS_PARAM );
float64 int32_to_float64( int STATUS_PARAM );
+float32 uint32_to_float32( unsigned int STATUS_PARAM );
+float64 uint32_to_float64( unsigned int STATUS_PARAM );
#ifdef FLOATX80
floatx80 int32_to_floatx80( int STATUS_PARAM );
#endif
@@ -189,6 +206,8 @@ float128 int64_to_float128( int64_t STATUS_PARAM );
*----------------------------------------------------------------------------*/
int float32_to_int32( float32 STATUS_PARAM );
int float32_to_int32_round_to_zero( float32 STATUS_PARAM );
+unsigned int float32_to_uint32( float32 STATUS_PARAM );
+unsigned int float32_to_uint32_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 );
@@ -215,13 +234,27 @@ char float32_lt( float32, float32 STATUS_PARAM );
char float32_eq_signaling( float32, float32 STATUS_PARAM );
char float32_le_quiet( float32, float32 STATUS_PARAM );
char float32_lt_quiet( float32, float32 STATUS_PARAM );
+char float32_compare( float32, float32 STATUS_PARAM );
+char float32_compare_quiet( float32, float32 STATUS_PARAM );
char float32_is_signaling_nan( float32 );
+INLINE float32 float32_abs(float32 a)
+{
+ return a & 0x7fffffff;
+}
+
+INLINE float32 float32_chs(float32 a)
+{
+ return a ^ 0x80000000;
+}
+
/*----------------------------------------------------------------------------
| Software IEC/IEEE double-precision conversion routines.
*----------------------------------------------------------------------------*/
int float64_to_int32( float64 STATUS_PARAM );
int float64_to_int32_round_to_zero( float64 STATUS_PARAM );
+unsigned int float64_to_uint32( float64 STATUS_PARAM );
+unsigned int float64_to_uint32_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 );
@@ -248,8 +281,20 @@ char float64_lt( float64, float64 STATUS_PARAM );
char float64_eq_signaling( float64, float64 STATUS_PARAM );
char float64_le_quiet( float64, float64 STATUS_PARAM );
char float64_lt_quiet( float64, float64 STATUS_PARAM );
+char float64_compare( float64, float64 STATUS_PARAM );
+char float64_compare_quiet( float64, float64 STATUS_PARAM );
char float64_is_signaling_nan( float64 );
+INLINE float64 float64_abs(float64 a)
+{
+ return a & 0x7fffffffffffffffLL;
+}
+
+INLINE float64 float64_chs(float64 a)
+{
+ return a ^ 0x8000000000000000LL;
+}
+
#ifdef FLOATX80
/*----------------------------------------------------------------------------
@@ -283,6 +328,18 @@ char floatx80_le_quiet( floatx80, floatx80 STATUS_PARAM );
char floatx80_lt_quiet( floatx80, floatx80 STATUS_PARAM );
char floatx80_is_signaling_nan( floatx80 );
+INLINE floatx80 floatx80_abs(floatx80 a)
+{
+ a.high &= 0x7fff;
+ return a;
+}
+
+INLINE floatx80 floatx80_chs(floatx80 a)
+{
+ a.high ^= 0x8000;
+ return a;
+}
+
#endif
#ifdef FLOAT128
@@ -318,6 +375,18 @@ char float128_le_quiet( float128, float128 STATUS_PARAM );
char float128_lt_quiet( float128, float128 STATUS_PARAM );
char float128_is_signaling_nan( float128 );
+INLINE float128 float128_abs(float128 a)
+{
+ a.high &= 0x7fffffffffffffffLL;
+ return a;
+}
+
+INLINE float128 float128_chs(float128 a)
+{
+ a.high ^= 0x8000000000000000LL;
+ return a;
+}
+
#endif
#else /* CONFIG_SOFTFLOAT */