added abs, chs and compare functions
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1338 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/fpu/softfloat.c b/fpu/softfloat.c
index ad57fd9..5e84620 100644
--- a/fpu/softfloat.c
+++ b/fpu/softfloat.c
@@ -54,6 +54,11 @@
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 @@
#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)
