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Re: [RFC v2 72/76] target/riscv: rvv-0.9: narrowing floating-point/integ
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From: |
Richard Henderson |
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Subject: |
Re: [RFC v2 72/76] target/riscv: rvv-0.9: narrowing floating-point/integer type-convert |
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Date: |
Fri, 31 Jul 2020 10:18:45 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 |
On 7/22/20 2:16 AM, frank.chang@sifive.com wrote:
> +DEF_HELPER_5(vfncvt_rod_f_f_w_h, void, ptr, ptr, ptr, env, i32)
> +DEF_HELPER_5(vfncvt_rod_f_f_w_w, void, ptr, ptr, ptr, env, i32)
> +DEF_HELPER_5(vfncvt_rtz_xu_f_w_b, void, ptr, ptr, ptr, env, i32)
> +DEF_HELPER_5(vfncvt_rtz_xu_f_w_h, void, ptr, ptr, ptr, env, i32)
> +DEF_HELPER_5(vfncvt_rtz_xu_f_w_w, void, ptr, ptr, ptr, env, i32)
> +DEF_HELPER_5(vfncvt_rtz_x_f_w_b, void, ptr, ptr, ptr, env, i32)
> +DEF_HELPER_5(vfncvt_rtz_x_f_w_h, void, ptr, ptr, ptr, env, i32)
> +DEF_HELPER_5(vfncvt_rtz_x_f_w_w, void, ptr, ptr, ptr, env, i32)
Again, no rtz helpers.
As for rod... I think you'll want a new helper akin to
helper_set_rounding_mode() that sets float_round_to_odd. We don't want to
change helper_set_rounding_mode because that's responsible for SIGILL, and this
should be an interface private to translation.
You'd probably want to add a private value for to be used only within
translate.c and insn_trans/*, so that gen_set_rm() can remember the odd setting
as with all of the others. E.g.
#define QEMU_FRM_ODD 8
r~
- [RFC v2 66/76] target/riscv: rvv-0.9: remove vmford.vv and vmford.vf, (continued)
- [RFC v2 66/76] target/riscv: rvv-0.9: remove vmford.vv and vmford.vf, frank . chang, 2020/07/22
- [RFC v2 67/76] target/riscv: rvv-0.9: remove integer extract instruction, frank . chang, 2020/07/22
- [RFC v2 68/76] fpu: add api to handle alternative sNaN propagation, frank . chang, 2020/07/22
- [RFC v2 69/76] target/riscv: rvv-0.9: floating-point min/max instructions, frank . chang, 2020/07/22
- [RFC v2 70/76] softfloat: add fp16 and uint8/int8 interconvert functions, frank . chang, 2020/07/22
- [RFC v2 71/76] target/riscv: rvv-0.9: widening floating-point/integer type-convert, frank . chang, 2020/07/22
- [RFC v2 72/76] target/riscv: rvv-0.9: narrowing floating-point/integer type-convert, frank . chang, 2020/07/22
- Re: [RFC v2 72/76] target/riscv: rvv-0.9: narrowing floating-point/integer type-convert,
Richard Henderson <=
- [RFC v2 73/76] fpu: fix float16 nan check, frank . chang, 2020/07/22
- [RFC v2 74/76] target/riscv: gdb: modify gdb csr xml file to align with csr register map, frank . chang, 2020/07/22
- [RFC v2 75/76] target/riscv: gdb: support vector registers for rv64, frank . chang, 2020/07/22
- [RFC v2 76/76] target/riscv: gdb: support vector registers for rv32, frank . chang, 2020/07/22