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From: Alistair Francis <alistair23@gmail.com>
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To: qemu-devel@nongnu.org
Cc: alistair23@gmail.com, Max Chou <max.chou@sifive.com>,
Daniel Henrique Barboza <dbarboza@ventanamicro.com>,
qemu-stable <qemu-stable@nongnu.org>,
Alistair Francis <alistair.francis@wdc.com>
Subject: [PULL 17/28] target/riscv: rvv: Fix Zvfhmin checking for vfwcvt.f.f.v
and vfncvt.f.f.w instructions
Date: Tue, 28 May 2024 12:43:17 +1000
Message-ID: <20240528024328.246965-18-alistair.francis@wdc.com>
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From: Max Chou <max.chou@sifive.com>
According v spec 18.4, only the vfwcvt.f.f.v and vfncvt.f.f.w
instructions will be affected by Zvfhmin extension.
And the vfwcvt.f.f.v and vfncvt.f.f.w instructions only support the
conversions of
* From 1*SEW(16/32) to 2*SEW(32/64)
* From 2*SEW(32/64) to 1*SEW(16/32)
Signed-off-by: Max Chou <max.chou@sifive.com>
Reviewed-by: Daniel Henrique Barboza <dbarboza@ventanamicro.com>
Cc: qemu-stable <qemu-stable@nongnu.org>
Message-ID: <20240322092600.1198921-2-max.chou@sifive.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/insn_trans/trans_rvv.c.inc | 20 ++++++++++++++++++--
1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/target/riscv/insn_trans/trans_rvv.c.inc b/target/riscv/insn_tr=
ans/trans_rvv.c.inc
index eec2939e23..678b34b759 100644
--- a/target/riscv/insn_trans/trans_rvv.c.inc
+++ b/target/riscv/insn_trans/trans_rvv.c.inc
@@ -50,6 +50,22 @@ static bool require_rvf(DisasContext *s)
}
}
=20
+static bool require_rvfmin(DisasContext *s)
+{
+ if (s->mstatus_fs =3D=3D EXT_STATUS_DISABLED) {
+ return false;
+ }
+
+ switch (s->sew) {
+ case MO_16:
+ return s->cfg_ptr->ext_zvfhmin;
+ case MO_32:
+ return s->cfg_ptr->ext_zve32f;
+ default:
+ return false;
+ }
+}
+
static bool require_scale_rvf(DisasContext *s)
{
if (s->mstatus_fs =3D=3D EXT_STATUS_DISABLED) {
@@ -75,8 +91,6 @@ static bool require_scale_rvfmin(DisasContext *s)
}
=20
switch (s->sew) {
- case MO_8:
- return s->cfg_ptr->ext_zvfhmin;
case MO_16:
return s->cfg_ptr->ext_zve32f;
case MO_32:
@@ -2685,6 +2699,7 @@ static bool opxfv_widen_check(DisasContext *s, arg_rm=
r *a)
static bool opffv_widen_check(DisasContext *s, arg_rmr *a)
{
return opfv_widen_check(s, a) &&
+ require_rvfmin(s) &&
require_scale_rvfmin(s) &&
(s->sew !=3D MO_8);
}
@@ -2790,6 +2805,7 @@ static bool opfxv_narrow_check(DisasContext *s, arg_r=
mr *a)
static bool opffv_narrow_check(DisasContext *s, arg_rmr *a)
{
return opfv_narrow_check(s, a) &&
+ require_rvfmin(s) &&
require_scale_rvfmin(s) &&
(s->sew !=3D MO_8);
}
--=20
2.45.1