diff options
Diffstat (limited to 'sysdeps/powerpc/powerpc32/fpu/s_lround.S')
| -rw-r--r-- | sysdeps/powerpc/powerpc32/fpu/s_lround.S | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/sysdeps/powerpc/powerpc32/fpu/s_lround.S b/sysdeps/powerpc/powerpc32/fpu/s_lround.S index d1472ce..92dc378 100644 --- a/sysdeps/powerpc/powerpc32/fpu/s_lround.S +++ b/sysdeps/powerpc/powerpc32/fpu/s_lround.S @@ -24,13 +24,13 @@ .LC0: /* 0.5 */ .long 0x3f000000 .section ".text" - + /* long [r3] lround (float x [fp1]) - IEEE 1003.1 lround function. IEEE specifies "round to the nearest + IEEE 1003.1 lround function. IEEE specifies "round to the nearest integer value, rounding halfway cases away from zero, regardless of the current rounding mode." However PowerPC Architecture defines - "round to Nearest" as "Choose the best approximation. In case of a - tie, choose the one that is even (least significant bit o).". + "round to Nearest" as "Choose the best approximation. In case of a + tie, choose the one that is even (least significant bit o).". So we can't use the PowerPC "round to Nearest" mode. Instead we set "round toward Zero" mode and round by adding +-0.5 before rounding to the integer value. It is necessary to detect when x is @@ -60,7 +60,7 @@ ENTRY (__lround) blt- cr6,.Lretzero fadd fp3,fp2,fp10 /* |x|+=0.5 bias to prepare to round. */ bge cr7,.Lconvert /* x is positive so don't negate x. */ - fnabs fp3,fp3 /* -(|x|+=0.5) */ + fnabs fp3,fp3 /* -(|x|+=0.5) */ .Lconvert: fctiwz fp4,fp3 /* Convert to Integer word lround toward 0. */ stfd fp4,8(r1) |