diff options
| author | Jason Wright <jason@cvs.openbsd.org> | 2001-09-10 20:39:05 +0000 |
|---|---|---|
| committer | Jason Wright <jason@cvs.openbsd.org> | 2001-09-10 20:39:05 +0000 |
| commit | d94ad4af16a4d6475a736d225c3ff9cd469c3bd4 (patch) | |
| tree | ef3f2f1801b1c6c72ee42b4a13bf351100219d09 /sys/arch | |
| parent | cf0a3aafd4f3d1aebfa8491b8f0ba507c8baa802 (diff) | |
More accurate compare (from netbsd)
Diffstat (limited to 'sys/arch')
| -rw-r--r-- | sys/arch/sparc64/fpu/fpu_compare.c | 22 |
1 files changed, 9 insertions, 13 deletions
diff --git a/sys/arch/sparc64/fpu/fpu_compare.c b/sys/arch/sparc64/fpu/fpu_compare.c index 2b2e462d569..f0df6f716a4 100644 --- a/sys/arch/sparc64/fpu/fpu_compare.c +++ b/sys/arch/sparc64/fpu/fpu_compare.c @@ -1,5 +1,5 @@ -/* $OpenBSD: fpu_compare.c,v 1.1 2001/09/08 22:33:51 jason Exp $ */ -/* $NetBSD: fpu_compare.c,v 1.2 1994/11/20 20:52:37 deraadt Exp $ */ +/* $OpenBSD: fpu_compare.c,v 1.2 2001/09/10 20:39:04 jason Exp $ */ +/* $NetBSD: fpu_compare.c,v 1.3 2001/08/26 05:46:31 eeh Exp $ */ /* * Copyright (c) 1992, 1993 @@ -78,7 +78,7 @@ void fpu_compare(struct fpemu *fe, int cmpe) { register struct fpn *a, *b; - register int cc, r3, r2, r1, r0; + register int cc; FPU_DECL_CARRY a = &fe->fe_f1; @@ -148,18 +148,14 @@ fpu_compare(struct fpemu *fe, int cmpe) } /* * Only numbers remain. To compare two numbers in magnitude, we - * simply subtract their mantissas. + * simply subtract them. */ - FPU_SUBS(r3, a->fp_mant[0], b->fp_mant[0]); - FPU_SUBCS(r2, a->fp_mant[1], b->fp_mant[1]); - FPU_SUBCS(r1, a->fp_mant[2], b->fp_mant[2]); - FPU_SUBC(r0, a->fp_mant[3], b->fp_mant[3]); - if (r0 < 0) /* underflow: |a| < |b| */ - cc = diff(FSR_CC_LT); - else if ((r0 | r1 | r2 | r3) != 0) /* |a| > |b| */ - cc = diff(FSR_CC_GT); + a = fpu_sub(fe); + if (a->fp_class == FPC_ZERO) + cc = FSR_CC_EQ; else - cc = FSR_CC_EQ; /* |a| == |b| */ + cc = diff(FSR_CC_GT); + done: fe->fe_fsr = (fe->fe_fsr & ~FSR_FCC) | (cc << FSR_FCC_SHIFT); } |