From: Nigel Stephens Date: Mon, 12 Oct 2009 21:57:18 +0000 (-0700) Subject: MIPS: Fix abs.[sd] and neg.[sd] emulation for NaN operands X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=cea2be444380fc1bf665cd023ed84be7e0872d28;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git MIPS: Fix abs.[sd] and neg.[sd] emulation for NaN operands This patch ensures that the sign bit is always updated for NaN operands. Signed-off-by: Chris Dearman Signed-off-by: Ralf Baechle --- diff --git a/arch/mips/math-emu/dp_simple.c b/arch/mips/math-emu/dp_simple.c index 1c555e6c6a9f..d9ae1dbabda7 100644 --- a/arch/mips/math-emu/dp_simple.c +++ b/arch/mips/math-emu/dp_simple.c @@ -62,8 +62,6 @@ ieee754dp ieee754dp_neg(ieee754dp x) return ieee754dp_nanxcpt(y, "neg"); } - if (ieee754dp_isnan(x)) /* but not infinity */ - return ieee754dp_nanxcpt(x, "neg", x); return x; } @@ -76,15 +74,12 @@ ieee754dp ieee754dp_abs(ieee754dp x) CLEARCX; FLUSHXDP; + /* Clear sign ALWAYS, irrespective of NaN */ + DPSIGN(x) = 0; + if (xc == IEEE754_CLASS_SNAN) { - SETCX(IEEE754_INVALID_OPERATION); - return ieee754dp_nanxcpt(ieee754dp_indef(), "neg"); + return ieee754dp_nanxcpt(ieee754dp_indef(), "abs"); } - if (ieee754dp_isnan(x)) /* but not infinity */ - return ieee754dp_nanxcpt(x, "abs", x); - - /* quick fix up */ - DPSIGN(x) = 0; return x; } diff --git a/arch/mips/math-emu/sp_simple.c b/arch/mips/math-emu/sp_simple.c index 770f0f4677cd..3175477d36f6 100644 --- a/arch/mips/math-emu/sp_simple.c +++ b/arch/mips/math-emu/sp_simple.c @@ -62,8 +62,6 @@ ieee754sp ieee754sp_neg(ieee754sp x) return ieee754sp_nanxcpt(y, "neg"); } - if (ieee754sp_isnan(x)) /* but not infinity */ - return ieee754sp_nanxcpt(x, "neg", x); return x; } @@ -76,15 +74,12 @@ ieee754sp ieee754sp_abs(ieee754sp x) CLEARCX; FLUSHXSP; + /* Clear sign ALWAYS, irrespective of NaN */ + SPSIGN(x) = 0; + if (xc == IEEE754_CLASS_SNAN) { - SETCX(IEEE754_INVALID_OPERATION); return ieee754sp_nanxcpt(ieee754sp_indef(), "abs"); } - if (ieee754sp_isnan(x)) /* but not infinity */ - return ieee754sp_nanxcpt(x, "abs", x); - - /* quick fix up */ - SPSIGN(x) = 0; return x; }