diff options
Diffstat (limited to 'target')
| -rw-r--r-- | target/arm/helper.h | 13 | ||||
| -rw-r--r-- | target/arm/translate-vfp.c.inc | 24 | ||||
| -rw-r--r-- | target/arm/vfp_helper.c | 23 |
3 files changed, 47 insertions, 13 deletions
diff --git a/target/arm/helper.h b/target/arm/helper.h index 8defd7c801..774d2cddb5 100644 --- a/target/arm/helper.h +++ b/target/arm/helper.h @@ -213,6 +213,19 @@ DEF_HELPER_3(vfp_ultoh, f16, i32, i32, ptr) DEF_HELPER_3(vfp_sqtoh, f16, i64, i32, ptr) DEF_HELPER_3(vfp_uqtoh, f16, i64, i32, ptr) +DEF_HELPER_3(vfp_shtos_round_to_nearest, f32, i32, i32, ptr) +DEF_HELPER_3(vfp_sltos_round_to_nearest, f32, i32, i32, ptr) +DEF_HELPER_3(vfp_uhtos_round_to_nearest, f32, i32, i32, ptr) +DEF_HELPER_3(vfp_ultos_round_to_nearest, f32, i32, i32, ptr) +DEF_HELPER_3(vfp_shtod_round_to_nearest, f64, i64, i32, ptr) +DEF_HELPER_3(vfp_sltod_round_to_nearest, f64, i64, i32, ptr) +DEF_HELPER_3(vfp_uhtod_round_to_nearest, f64, i64, i32, ptr) +DEF_HELPER_3(vfp_ultod_round_to_nearest, f64, i64, i32, ptr) +DEF_HELPER_3(vfp_shtoh_round_to_nearest, f16, i32, i32, ptr) +DEF_HELPER_3(vfp_uhtoh_round_to_nearest, f16, i32, i32, ptr) +DEF_HELPER_3(vfp_sltoh_round_to_nearest, f16, i32, i32, ptr) +DEF_HELPER_3(vfp_ultoh_round_to_nearest, f16, i32, i32, ptr) + DEF_HELPER_FLAGS_2(set_rmode, TCG_CALL_NO_RWG, i32, i32, ptr) DEF_HELPER_FLAGS_3(vfp_fcvt_f16_to_f32, TCG_CALL_NO_RWG, f32, f16, ptr, i32) diff --git a/target/arm/translate-vfp.c.inc b/target/arm/translate-vfp.c.inc index 28e0dba5f1..9b11b81f80 100644 --- a/target/arm/translate-vfp.c.inc +++ b/target/arm/translate-vfp.c.inc @@ -3141,16 +3141,16 @@ static bool trans_VCVT_fix_hp(DisasContext *s, arg_VCVT_fix_sp *a) /* Switch on op:U:sx bits */ switch (a->opc) { case 0: - gen_helper_vfp_shtoh(vd, vd, shift, fpst); + gen_helper_vfp_shtoh_round_to_nearest(vd, vd, shift, fpst); break; case 1: - gen_helper_vfp_sltoh(vd, vd, shift, fpst); + gen_helper_vfp_sltoh_round_to_nearest(vd, vd, shift, fpst); break; case 2: - gen_helper_vfp_uhtoh(vd, vd, shift, fpst); + gen_helper_vfp_uhtoh_round_to_nearest(vd, vd, shift, fpst); break; case 3: - gen_helper_vfp_ultoh(vd, vd, shift, fpst); + gen_helper_vfp_ultoh_round_to_nearest(vd, vd, shift, fpst); break; case 4: gen_helper_vfp_toshh_round_to_zero(vd, vd, shift, fpst); @@ -3200,16 +3200,16 @@ static bool trans_VCVT_fix_sp(DisasContext *s, arg_VCVT_fix_sp *a) /* Switch on op:U:sx bits */ switch (a->opc) { case 0: - gen_helper_vfp_shtos(vd, vd, shift, fpst); + gen_helper_vfp_shtos_round_to_nearest(vd, vd, shift, fpst); break; case 1: - gen_helper_vfp_sltos(vd, vd, shift, fpst); + gen_helper_vfp_sltos_round_to_nearest(vd, vd, shift, fpst); break; case 2: - gen_helper_vfp_uhtos(vd, vd, shift, fpst); + gen_helper_vfp_uhtos_round_to_nearest(vd, vd, shift, fpst); break; case 3: - gen_helper_vfp_ultos(vd, vd, shift, fpst); + gen_helper_vfp_ultos_round_to_nearest(vd, vd, shift, fpst); break; case 4: gen_helper_vfp_toshs_round_to_zero(vd, vd, shift, fpst); @@ -3265,16 +3265,16 @@ static bool trans_VCVT_fix_dp(DisasContext *s, arg_VCVT_fix_dp *a) /* Switch on op:U:sx bits */ switch (a->opc) { case 0: - gen_helper_vfp_shtod(vd, vd, shift, fpst); + gen_helper_vfp_shtod_round_to_nearest(vd, vd, shift, fpst); break; case 1: - gen_helper_vfp_sltod(vd, vd, shift, fpst); + gen_helper_vfp_sltod_round_to_nearest(vd, vd, shift, fpst); break; case 2: - gen_helper_vfp_uhtod(vd, vd, shift, fpst); + gen_helper_vfp_uhtod_round_to_nearest(vd, vd, shift, fpst); break; case 3: - gen_helper_vfp_ultod(vd, vd, shift, fpst); + gen_helper_vfp_ultod_round_to_nearest(vd, vd, shift, fpst); break; case 4: gen_helper_vfp_toshd_round_to_zero(vd, vd, shift, fpst); diff --git a/target/arm/vfp_helper.c b/target/arm/vfp_helper.c index 5666393ef7..abfdb6a8e2 100644 --- a/target/arm/vfp_helper.c +++ b/target/arm/vfp_helper.c @@ -393,12 +393,32 @@ float32 VFP_HELPER(fcvts, d)(float64 x, CPUARMState *env) return float64_to_float32(x, &env->vfp.fp_status); } -/* VFP3 fixed point conversion. */ +/* + * VFP3 fixed point conversion. The AArch32 versions of fix-to-float + * must always round-to-nearest; the AArch64 ones honour the FPSCR + * rounding mode. (For AArch32 Neon the standard-FPSCR is set to + * round-to-nearest so either helper will work.) AArch32 float-to-fix + * must round-to-zero. + */ #define VFP_CONV_FIX_FLOAT(name, p, fsz, ftype, isz, itype) \ ftype HELPER(vfp_##name##to##p)(uint##isz##_t x, uint32_t shift, \ void *fpstp) \ { return itype##_to_##float##fsz##_scalbn(x, -shift, fpstp); } +#define VFP_CONV_FIX_FLOAT_ROUND(name, p, fsz, ftype, isz, itype) \ + ftype HELPER(vfp_##name##to##p##_round_to_nearest)(uint##isz##_t x, \ + uint32_t shift, \ + void *fpstp) \ + { \ + ftype ret; \ + float_status *fpst = fpstp; \ + FloatRoundMode oldmode = fpst->float_rounding_mode; \ + fpst->float_rounding_mode = float_round_nearest_even; \ + ret = itype##_to_##float##fsz##_scalbn(x, -shift, fpstp); \ + fpst->float_rounding_mode = oldmode; \ + return ret; \ + } + #define VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, ftype, isz, itype, ROUND, suff) \ uint##isz##_t HELPER(vfp_to##name##p##suff)(ftype x, uint32_t shift, \ void *fpst) \ @@ -412,6 +432,7 @@ uint##isz##_t HELPER(vfp_to##name##p##suff)(ftype x, uint32_t shift, \ #define VFP_CONV_FIX(name, p, fsz, ftype, isz, itype) \ VFP_CONV_FIX_FLOAT(name, p, fsz, ftype, isz, itype) \ +VFP_CONV_FIX_FLOAT_ROUND(name, p, fsz, ftype, isz, itype) \ VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, ftype, isz, itype, \ float_round_to_zero, _round_to_zero) \ VFP_CONV_FLOAT_FIX_ROUND(name, p, fsz, ftype, isz, itype, \ |