From: "J. Mayer" <l_indien@magic.fr>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] [PATCH] softfloat missing functions
Date: Mon, 19 Mar 2007 08:58:26 +0100 [thread overview]
Message-ID: <1174291106.24702.9.camel@rapid> (raw)
[-- Attachment #1: Type: text/plain, Size: 905 bytes --]
Some functions are missing from the softfloat API. Those are:
float32 uint32_to_float32( unsigned int STATUS_PARAM);
float64 uint64_to_float64( uint64_t v STATUS_PARAM);
unsigned int float32_to_uint32( float32 a STATUS_PARAM);
unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM);
unsigned int float64_to_uint32( float64 STATUS_PARAM );
unsigned int float64_to_uint32_round_to_zero( float64 STATUS_PARAM );
uint64_t float64_to_uint64( float64 STATUS_PARAM );
uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
As I need those function to emulate some PowerPC operations, here's a
proposal for their implementation.
Note that float64_to_uint64 functions are not correct, as they won't
return results between INT64_MAX and UINT64_MAX. Hope someone may know
the proper solution for this.
Please comment and help me fix this.
--
J. Mayer <l_indien@magic.fr>
Never organized
[-- Attachment #2: qemu_softfloat.diff --]
[-- Type: text/x-patch, Size: 7949 bytes --]
Index: fpu/softfloat-native.c
===================================================================
RCS file: /sources/qemu/qemu/fpu/softfloat-native.c,v
retrieving revision 1.6
diff -u -d -d -p -r1.6 softfloat-native.c
--- fpu/softfloat-native.c 28 Oct 2006 19:27:11 -0000 1.6
+++ fpu/softfloat-native.c 19 Mar 2007 07:30:45 -0000
@@ -59,6 +59,11 @@ float32 int32_to_float32(int v STATUS_PA
return (float32)v;
}
+float32 uint32_to_float32(unsigned int v STATUS_PARAM)
+{
+ return (float32)v;
+}
+
float64 int32_to_float64(int v STATUS_PARAM)
{
return (float64)v;
@@ -78,6 +83,10 @@ float64 int64_to_float64( int64_t v STAT
{
return (float64)v;
}
+float64 uint64_to_float64( uint64_t v STATUS_PARAM)
+{
+ return (float64)v;
+}
#ifdef FLOATX80
floatx80 int64_to_floatx80( int64_t v STATUS_PARAM)
{
@@ -132,6 +141,37 @@ floatx80 float32_to_floatx80( float32 a
}
#endif
+unsigned int float32_to_uint32( float32 a STATUS_PARAM)
+{
+ int64_t v;
+ unsigned int res;
+
+ v = llrintf(a);
+ if (v < 0) {
+ res = 0;
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ } else {
+ res = v;
+ }
+ return res;
+}
+unsigned int float32_to_uint32_round_to_zero( float32 a STATUS_PARAM)
+{
+ int64_t v;
+ unsigned int res;
+
+ v = (int64_t)a;
+ if (v < 0) {
+ res = 0;
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ } else {
+ res = v;
+ }
+ return res;
+}
+
/*----------------------------------------------------------------------------
| Software IEC/IEEE single-precision operations.
*----------------------------------------------------------------------------*/
@@ -218,6 +258,63 @@ float128 float64_to_float128( float64 a
}
#endif
+unsigned int float64_to_uint32( float64 a STATUS_PARAM)
+{
+ int64_t v;
+ unsigned int res;
+
+ v = llrint(a);
+ if (v < 0) {
+ res = 0;
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ } else {
+ res = v;
+ }
+ return res;
+}
+unsigned int float64_to_uint32_round_to_zero( float64 a STATUS_PARAM)
+{
+ int64_t v;
+ unsigned int res;
+
+ v = (int64_t)a;
+ if (v < 0) {
+ res = 0;
+ } else if (v > 0xffffffff) {
+ res = 0xffffffff;
+ } else {
+ res = v;
+ }
+ return res;
+}
+uint64_t float64_to_uint64 (float64 a STATUS_PARAM)
+{
+ uint64_t res;
+ int64_t v;
+
+ v = llrint(a);
+ if (v < 0) {
+ res = 0;
+ } else {
+ res = v;
+ }
+ return res;
+}
+uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM)
+{
+ uint64_t res;
+ int64_t v;
+
+ v = (int64_t)a;
+ if (v < 0) {
+ res = 0;
+ } else {
+ res = v;
+ }
+ return res;
+}
+
/*----------------------------------------------------------------------------
| Software IEC/IEEE double-precision operations.
*----------------------------------------------------------------------------*/
Index: fpu/softfloat-native.h
===================================================================
RCS file: /sources/qemu/qemu/fpu/softfloat-native.h,v
retrieving revision 1.8
diff -u -d -d -p -r1.8 softfloat-native.h
--- fpu/softfloat-native.h 28 Oct 2006 19:27:11 -0000 1.8
+++ fpu/softfloat-native.h 19 Mar 2007 07:30:45 -0000
@@ -99,6 +99,7 @@ void set_floatx80_rounding_precision(int
| Software IEC/IEEE integer-to-floating-point conversion routines.
*----------------------------------------------------------------------------*/
float32 int32_to_float32( int STATUS_PARAM);
+float32 uint32_to_float32( unsigned int STATUS_PARAM);
float64 int32_to_float64( int STATUS_PARAM);
#ifdef FLOATX80
floatx80 int32_to_floatx80( int STATUS_PARAM);
@@ -108,6 +109,7 @@ float128 int32_to_float128( int STATUS_P
#endif
float32 int64_to_float32( int64_t STATUS_PARAM);
float64 int64_to_float64( int64_t STATUS_PARAM);
+float64 uint64_to_float64( uint64_t v STATUS_PARAM);
#ifdef FLOATX80
floatx80 int64_to_floatx80( int64_t STATUS_PARAM);
#endif
@@ -120,6 +122,8 @@ float128 int64_to_float128( int64_t STAT
*----------------------------------------------------------------------------*/
int float32_to_int32( float32 STATUS_PARAM);
int float32_to_int32_round_to_zero( float32 STATUS_PARAM);
+unsigned int float32_to_uint32( float32 a STATUS_PARAM);
+unsigned int float32_to_uint32_round_to_zero( float32 a 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);
@@ -200,8 +204,12 @@ INLINE float32 float32_chs(float32 a)
*----------------------------------------------------------------------------*/
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 );
+uint64_t float64_to_uint64( float64 STATUS_PARAM );
+uint64_t float64_to_uint64_round_to_zero( float64 STATUS_PARAM );
float32 float64_to_float32( float64 STATUS_PARAM );
#ifdef FLOATX80
floatx80 float64_to_floatx80( float64 STATUS_PARAM );
Index: fpu/softfloat.c
===================================================================
RCS file: /sources/qemu/qemu/fpu/softfloat.c,v
retrieving revision 1.4
diff -u -d -d -p -r1.4 softfloat.c
--- fpu/softfloat.c 28 Oct 2006 19:27:11 -0000 1.4
+++ fpu/softfloat.c 19 Mar 2007 07:30:46 -0000
@@ -1183,6 +1183,13 @@ float64 int64_to_float64( int64 a STATUS
}
+float64 uint64_to_float64( uint64 a STATUS_PARAM )
+{
+ if ( a == 0 ) return 0;
+ return normalizeRoundAndPackFloat64( 0, 0x43C, a STATUS_VAR );
+
+}
+
#ifdef FLOATX80
/*----------------------------------------------------------------------------
@@ -5282,6 +5289,36 @@ unsigned int float64_to_uint32_round_to_
return res;
}
+uint64_t float64_to_uint64 (float64 a STATUS_PARAM)
+{
+ uint64_t res;
+ int64_t v;
+
+ v = float64_to_int64(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else {
+ res = v;
+ }
+ return res;
+}
+
+uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM)
+{
+ uint64_t res;
+ int64_t v;
+
+ v = float64_to_int64_round_to_zero(a STATUS_VAR);
+ if (v < 0) {
+ res = 0;
+ float_raise( float_flag_invalid STATUS_VAR);
+ } else {
+ res = v;
+ }
+ return res;
+}
+
#define COMPARE(s, nan_exp) \
INLINE int float ## s ## _compare_internal( float ## s a, float ## s b, \
int is_quiet STATUS_PARAM ) \
Index: fpu/softfloat.h
===================================================================
RCS file: /sources/qemu/qemu/fpu/softfloat.h,v
retrieving revision 1.5
diff -u -d -d -p -r1.5 softfloat.h
--- fpu/softfloat.h 28 Oct 2006 19:27:11 -0000 1.5
+++ fpu/softfloat.h 19 Mar 2007 07:30:46 -0000
@@ -194,6 +194,7 @@ float128 int32_to_float128( int STATUS_P
#endif
float32 int64_to_float32( int64_t STATUS_PARAM );
float64 int64_to_float64( int64_t STATUS_PARAM );
+float64 uint64_to_float64( uint64_t STATUS_PARAM );
#ifdef FLOATX80
floatx80 int64_to_floatx80( int64_t STATUS_PARAM );
#endif
@@ -258,6 +259,8 @@ unsigned int float64_to_uint32( float64
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 );
+uint64_t float64_to_uint64 (float64 a STATUS_PARAM);
+uint64_t float64_to_uint64_round_to_zero (float64 a STATUS_PARAM);
float32 float64_to_float32( float64 STATUS_PARAM );
#ifdef FLOATX80
floatx80 float64_to_floatx80( float64 STATUS_PARAM );
next reply other threads:[~2007-03-19 8:00 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-03-19 7:58 J. Mayer [this message]
2007-03-19 20:37 ` [Qemu-devel] [PATCH] softfloat missing functions Julian Seward
2007-03-19 21:10 ` J. Mayer
2007-03-19 22:53 ` Julian Seward
2007-03-19 23:13 ` J. Mayer
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