Date: Sun, 21 Mar 2010 13:30:08 GMT From: dfilter@FreeBSD.ORG (dfilter service) To: freebsd-sparc64@FreeBSD.org Subject: Re: sparc64/144900: commit references a PR Message-ID: <201003211330.o2LDU8MO062274@freefall.freebsd.org>
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The following reply was made to PR sparc64/144900; it has been noted by GNATS. From: dfilter@FreeBSD.ORG (dfilter service) To: bug-followup@FreeBSD.org Cc: Subject: Re: sparc64/144900: commit references a PR Date: Sun, 21 Mar 2010 13:21:05 +0000 (UTC) Author: marius Date: Sun Mar 21 13:18:08 2010 New Revision: 205410 URL: http://svn.freebsd.org/changeset/base/205410 Log: Avoid aliasing which leads to incorrect results when compiling with the default strict aliasing rules. PR: 144900 Submitted by: Peter Jeremy MFC after: 3 days Modified: head/lib/libc/sparc64/fpu/fpu_explode.c Modified: head/lib/libc/sparc64/fpu/fpu_explode.c ============================================================================== --- head/lib/libc/sparc64/fpu/fpu_explode.c Sun Mar 21 13:09:54 2010 (r205409) +++ head/lib/libc/sparc64/fpu/fpu_explode.c Sun Mar 21 13:18:08 2010 (r205410) @@ -139,9 +139,9 @@ __fpu_xtof(fp, i) * a signed or unsigned entity. */ if (fp->fp_sign && (int64_t)i < 0) - *((int64_t*)fp->fp_mant) = -i; + *((int64_t *)fp->fp_mant) = -i; else - *((int64_t*)fp->fp_mant) = i; + *((int64_t *)fp->fp_mant) = i; fp->fp_mant[2] = 0; fp->fp_mant[3] = 0; __fpu_norm(fp); @@ -262,14 +262,12 @@ __fpu_explode(fe, fp, type, reg) struct fpn *fp; int type, reg; { - u_int32_t s, *sp; - u_int64_t l[2]; - void *vl = l; + u_int64_t l0, l1; + u_int32_t s; if (type == FTYPE_LNG || type == FTYPE_DBL || type == FTYPE_EXT) { - l[0] = __fpu_getreg64(reg & ~1); - sp = vl; - fp->fp_sign = sp[0] >> 31; + l0 = __fpu_getreg64(reg & ~1); + fp->fp_sign = l0 >> 63; } else { s = __fpu_getreg(reg); fp->fp_sign = s >> 31; @@ -277,7 +275,7 @@ __fpu_explode(fe, fp, type, reg) fp->fp_sticky = 0; switch (type) { case FTYPE_LNG: - s = __fpu_xtof(fp, l[0]); + s = __fpu_xtof(fp, l0); break; case FTYPE_INT: @@ -289,12 +287,13 @@ __fpu_explode(fe, fp, type, reg) break; case FTYPE_DBL: - s = __fpu_dtof(fp, sp[0], sp[1]); + s = __fpu_dtof(fp, l0 >> 32, l0 & 0xffffffff); break; case FTYPE_EXT: - l[1] = __fpu_getreg64((reg & ~1) + 2); - s = __fpu_qtof(fp, sp[0], sp[1], sp[2], sp[3]); + l1 = __fpu_getreg64((reg & ~1) + 2); + s = __fpu_qtof(fp, l0 >> 32, l0 & 0xffffffff, l1 >> 32, + l1 & 0xffffffff); break; default: _______________________________________________ svn-src-all@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/svn-src-all To unsubscribe, send any mail to "svn-src-all-unsubscribe@freebsd.org"
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