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Re: [Qemu-devel] [PATCH v3 3/4] softfloat: use floatx80_infinity in soft
From: |
Richard Henderson |
Subject: |
Re: [Qemu-devel] [PATCH v3 3/4] softfloat: use floatx80_infinity in softfloat |
Date: |
Fri, 23 Feb 2018 18:26:26 -0800 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.6.0 |
On 02/23/2018 06:59 AM, Laurent Vivier wrote:
> @@ -4550,8 +4556,8 @@ int64_t floatx80_to_int64(floatx80 a, float_status
> *status)
> if ( shiftCount ) {
> float_raise(float_flag_invalid, status);
> if ( ! aSign
> - || ( ( aExp == 0x7FFF )
> - && ( aSig != LIT64( 0x8000000000000000 ) ) )
> + || ((aExp == floatx80_infinity_high)
> + && (aSig != floatx80_infinity_low))
> ) {
As long as you're cleaning this up, m68k ignores the explicit integer bit when
considering an infinity. However, Intel doesn't ignore the bit -- it appears
to treat 7fff.0* as a NaN.
r~
- [Qemu-devel] [PATCH v3 0/4] target/m68k: implement 680x0 FPU (part 3), Laurent Vivier, 2018/02/23
- [Qemu-devel] [PATCH v3 4/4] target/m68k: add fscale, fgetman and fgetexp, Laurent Vivier, 2018/02/23
- [Qemu-devel] [PATCH v3 2/4] target/m68k: add fmod/frem, Laurent Vivier, 2018/02/23
- [Qemu-devel] [PATCH v3 1/4] softfloat: export some functions, Laurent Vivier, 2018/02/23
- [Qemu-devel] [PATCH v3 3/4] softfloat: use floatx80_infinity in softfloat, Laurent Vivier, 2018/02/23
- Re: [Qemu-devel] [PATCH v3 3/4] softfloat: use floatx80_infinity in softfloat,
Richard Henderson <=