Module Name: src
Committed By: matt
Date: Fri May 20 16:30:05 UTC 2011
Modified Files:
src/lib/libc/softfloat/bits64 [matt-nb5-mips64]: softfloat.c
Log Message:
Add float128_to_uint32_round_to_zero
To generate a diff of this commit:
cvs rdiff -u -r1.5 -r1.5.20.1 src/lib/libc/softfloat/bits64/softfloat.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/lib/libc/softfloat/bits64/softfloat.c
diff -u src/lib/libc/softfloat/bits64/softfloat.c:1.5 src/lib/libc/softfloat/bits64/softfloat.c:1.5.20.1
--- src/lib/libc/softfloat/bits64/softfloat.c:1.5 Thu Nov 8 21:31:04 2007
+++ src/lib/libc/softfloat/bits64/softfloat.c Fri May 20 16:30:05 2011
@@ -1,4 +1,4 @@
-/* $NetBSD: softfloat.c,v 1.5 2007/11/08 21:31:04 martin Exp $ */
+/* softfloat.c,v 1.5 2007/11/08 21:31:04 martin Exp */
/*
* This version hacked for use with gcc -msoft-float by bjh21.
@@ -46,7 +46,7 @@
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
-__RCSID("$NetBSD: softfloat.c,v 1.5 2007/11/08 21:31:04 martin Exp $");
+__RCSID("softfloat.c,v 1.5 2007/11/08 21:31:04 martin Exp");
#endif /* LIBC_SCCS and not lint */
#ifdef SOFTFLOAT_FOR_GCC
@@ -4335,6 +4335,46 @@
}
/*
+ * just like above - but do not care for overflow of signed results
+ */
+unsigned int float128_to_uint32_round_to_zero( float128 a )
+{
+ flag aSign;
+ int32 aExp, shiftCount;
+ bits64 aSig0, aSig1, savedASig;
+ uint32 z;
+
+ aSig1 = extractFloat128Frac1( a );
+ aSig0 = extractFloat128Frac0( a );
+ aExp = extractFloat128Exp( a );
+ aSign = extractFloat128Sign( a );
+ aSig0 |= ( aSig1 != 0 );
+ if ( 0x401E < aExp ) {
+ if ( ( aExp == 0x7FFF ) && aSig0 ) aSign = 0;
+ goto invalid;
+ }
+ else if ( aExp < 0x3FFF ) {
+ if ( aExp || aSig0 ) float_exception_flags |= float_flag_inexact;
+ return 0;
+ }
+ aSig0 |= LIT64( 0x0001000000000000 );
+ shiftCount = 0x402F - aExp;
+ savedASig = aSig0;
+ aSig0 >>= shiftCount;
+ z = aSig0;
+ if ( aSign ) {
+ invalid:
+ float_raise( float_flag_invalid );
+ return 0xFFFFFFFF;
+ }
+ if ( ( aSig0<<shiftCount ) != savedASig ) {
+ float_exception_flags |= float_flag_inexact;
+ }
+ return z;
+
+}
+
+/*
-------------------------------------------------------------------------------
Returns the result of converting the quadruple-precision floating-point
value `a' to the 64-bit two's complement integer format. The conversion
