Commit 7b1fbf29 authored Aug 03, 2005 by Catalin Marinas Committed by Russell King Aug 03, 2005

[PATCH] ARM: 2841/1: Fix VFP +/-0 case for doubles addition



Patch from Catalin Marinas

The IEEE 754 standard specifies that the result of (x - x), where x is
a valid number, should be -0 if the rounding mode is towards minus
infinity or +0 otherwise.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

parent 85829750

arch/arm/vfp/vfpdouble.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -770,6 +770,9 @@ vfp_double_add(struct vfp_double vdd, struct vfp_double vdn,
		if ((s64)m_sig < 0) {
		vdd->sign = vfp_sign_negate(vdd->sign);
		m_sig = -m_sig;
		} else if (m_sig == 0) {
		vdd->sign = (fpscr & FPSCR_RMODE_MASK) ==
		FPSCR_ROUND_MINUSINF ? 0x8000 : 0;
		}
		} else {
		m_sig += vdn->significand;