From af1e6be4ba60067907ea9e19e0cd6897d194e9cf Mon Sep 17 00:00:00 2001 From: Tulio Magno Quites Machado Filho Date: Fri, 12 Jan 2018 20:39:42 -0200 Subject: powerpc: Fix llround spurious inexact on 32-bit POWER4 [BZ #22697] This issue is similar to BZ #19235, where spurious exceptions are created from adding 0.5 then converting to an integer. The solution is based on Joseph's fix for BZ #19235. [BZ #22697] * sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S (__llround): Do not add 0.5 to integer or out-of-range arguments. --- sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'sysdeps/powerpc/powerpc32') diff --git a/sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S b/sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S index d0b00ac383..5ad89a1486 100644 --- a/sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S +++ b/sysdeps/powerpc/powerpc32/power4/fpu/s_llround.S @@ -71,6 +71,11 @@ ENTRY (__llround) fcmpu cr1,fp1,fp12 /* x is negative? x < 0.0 */ blt- cr6,.Lretzero /* 0.5 > x < -0.5 so just return 0. */ bge- cr7,.Lnobias /* 2^52 > x < -2^52 just convert with no bias. */ + /* Test whether an integer to avoid spurious "inexact". */ + fadd fp3,fp2,fp9 + fsub fp3,fp3,fp9 + fcmpu cr5,fp2,fp3 + beq cr5,.Lnobias fadd fp3,fp2,fp10 /* |x|+=0.5 bias to prepare to round. */ bge cr1,.Lconvert /* x is positive so don't negate x. */ fnabs fp3,fp3 /* -(|x|+=0.5) */ -- cgit 1.4.1