Add a TestFloat based test suite for floating-point implementations

currently supporting sparc64. After a `make depend all` there are
three programs; testsoftfloat for testing against the SoftFloat in
src/lib/libc/softfloat for reference purposes, testemufloat for
testing the emulator source in src/lib/libc/sparc64/fpu and testfloat
for testing with the installed libc. Support for other architectures
can be added as needed.

PR:		144900
Submitted by:	Peter Jeremy

1 files changed, 183 insertions, 0 deletions

diff --git a/tools/test/testfloat/writeHex.c b/tools/test/testfloat/writeHex.c
new file mode 100644
index 0000000..f304aed
--- /dev/null
+++ b/tools/test/testfloat/writeHex.c
@@ -0,0 +1,183 @@
+
+/*
+===============================================================================
+
+This C source file is part of TestFloat, Release 2a, a package of programs
+for testing the correctness of floating-point arithmetic complying to the
+IEC/IEEE Standard for Floating-Point.
+
+Written by John R. Hauser.  More information is available through the Web
+page `http://HTTP.CS.Berkeley.EDU/~jhauser/arithmetic/TestFloat.html'.
+
+THIS SOFTWARE IS DISTRIBUTED AS IS, FOR FREE.  Although reasonable effort
+has been made to avoid it, THIS SOFTWARE MAY CONTAIN FAULTS THAT WILL AT
+TIMES RESULT IN INCORRECT BEHAVIOR.  USE OF THIS SOFTWARE IS RESTRICTED TO
+PERSONS AND ORGANIZATIONS WHO CAN AND WILL TAKE FULL RESPONSIBILITY FOR ANY
+AND ALL LOSSES, COSTS, OR OTHER PROBLEMS ARISING FROM ITS USE.
+
+Derivative works are acceptable, even for commercial purposes, so long as
+(1) they include prominent notice that the work is derivative, and (2) they
+include prominent notice akin to these four paragraphs for those parts of
+this code that are retained.
+
+===============================================================================
+*/
+
+#include <stdio.h>
+#include "milieu.h"
+#include "softfloat.h"
+#include "writeHex.h"
+
+void writeHex_flag( flag a, FILE *stream )
+{
+
+    fputc( a ? '1' : '0', stream );
+
+}
+
+static void writeHex_bits8( bits8 a, FILE *stream )
+{
+    int digit;
+
+    digit = ( a>>4 ) & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+    digit = a & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+
+}
+
+static void writeHex_bits12( int16 a, FILE *stream )
+{
+    int digit;
+
+    digit = ( a>>8 ) & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+    digit = ( a>>4 ) & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+    digit = a & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+
+}
+
+static void writeHex_bits16( bits16 a, FILE *stream )
+{
+    int digit;
+
+    digit = ( a>>12 ) & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+    digit = ( a>>8 ) & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+    digit = ( a>>4 ) & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+    digit = a & 0xF;
+    if ( 9 < digit ) digit += 'A' - ( '0' + 10 );
+    fputc( '0' + digit, stream );
+
+}
+
+void writeHex_bits32( bits32 a, FILE *stream )
+{
+
+    writeHex_bits16( a>>16, stream );
+    writeHex_bits16( a, stream );
+
+}
+
+#ifdef BITS64
+
+void writeHex_bits64( bits64 a, FILE *stream )
+{
+
+    writeHex_bits32( a>>32, stream );
+    writeHex_bits32( a, stream );
+
+}
+
+#endif
+
+void writeHex_float32( float32 a, FILE *stream )
+{
+
+    fputc( ( ( (sbits32) a ) < 0 ) ? '8' : '0', stream );
+    writeHex_bits8( a>>23, stream );
+    fputc( '.', stream );
+    writeHex_bits8( ( a>>16 ) & 0x7F, stream );
+    writeHex_bits16( a, stream );
+
+}
+
+#ifdef BITS64
+
+void writeHex_float64( float64 a, FILE *stream )
+{
+
+    writeHex_bits12( a>>52, stream );
+    fputc( '.', stream );
+    writeHex_bits12( a>>40, stream );
+    writeHex_bits8( a>>32, stream );
+    writeHex_bits32( a, stream );
+
+}
+
+#else
+
+void writeHex_float64( float64 a, FILE *stream )
+{
+
+    writeHex_bits12( a.high>>20, stream );
+    fputc( '.', stream );
+    writeHex_bits12( a.high>>8, stream );
+    writeHex_bits8( a.high, stream );
+    writeHex_bits32( a.low, stream );
+
+}
+
+#endif
+
+#ifdef FLOATX80
+
+void writeHex_floatx80( floatx80 a, FILE *stream )
+{
+
+    writeHex_bits16( a.high, stream );
+    fputc( '.', stream );
+    writeHex_bits64( a.low, stream );
+
+}
+
+#endif
+
+#ifdef FLOAT128
+
+void writeHex_float128( float128 a, FILE *stream )
+{
+
+    writeHex_bits16( a.high>>48, stream );
+    fputc( '.', stream );
+    writeHex_bits16( a.high>>32, stream );
+    writeHex_bits32( a.high, stream );
+    writeHex_bits64( a.low, stream );
+
+}
+
+#endif
+
+void writeHex_float_flags( uint8 flags, FILE *stream )
+{
+
+    fputc( flags & float_flag_invalid   ? 'v' : '.', stream );
+    fputc( flags & float_flag_divbyzero ? 'z' : '.', stream );
+    fputc( flags & float_flag_overflow  ? 'o' : '.', stream );
+    fputc( flags & float_flag_underflow ? 'u' : '.', stream );
+    fputc( flags & float_flag_inexact   ? 'x' : '.', stream );
+
+}
+