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target/riscv: rvv-1.0: Add Zve64f support for scalar fp insns 

Zve64f extension requires the scalar processor to implement the F
extension and implement all vector floating-point instructions for
floating-point operands with EEW=32 (i.e., no widening floating-point
operations).

Signed-off-by: Frank Chang <frank.chang@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20220118014522.13613-7-frank.chang@sifive.com
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Frank Chang 2022-01-18 09:45:09 +08:00 committed by Alistair Francis
parent 13dbc826fd
commit 40d78c85f6
1 changed files with 31 additions and 10 deletions
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41
target/riscv/insn_trans/trans_rvv.c.inc
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@ -66,6 +66,17 @@ static bool require_scale_rvf(DisasContext *s)
} }
} }
static bool require_zve64f(DisasContext *s)
{
/* RVV + Zve64f = RVV. */
if (has_ext(s, RVV)) {
return true;
}
/* Zve64f doesn't support FP64. (Section 18.2) */
return s->ext_zve64f ? s->sew <= MO_32 : true;
}
/* Destination vector register group cannot overlap source mask register. */ /* Destination vector register group cannot overlap source mask register. */
static bool require_vm(int vm, int vd) static bool require_vm(int vm, int vd)
{ {
@ -2206,7 +2217,8 @@ static bool opfvv_check(DisasContext *s, arg_rmrr *a)
return require_rvv(s) && return require_rvv(s) &&
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s) && vext_check_isa_ill(s) &&
vext_check_sss(s, a->rd, a->rs1, a->rs2, a->vm); vext_check_sss(s, a->rd, a->rs1, a->rs2, a->vm) &&
require_zve64f(s);
} }
/* OPFVV without GVEC IR */ /* OPFVV without GVEC IR */
@ -2286,7 +2298,8 @@ static bool opfvf_check(DisasContext *s, arg_rmrr *a)
return require_rvv(s) && return require_rvv(s) &&
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s) && vext_check_isa_ill(s) &&
vext_check_ss(s, a->rd, a->rs2, a->vm); vext_check_ss(s, a->rd, a->rs2, a->vm) &&
require_zve64f(s);
} }
/* OPFVF without GVEC IR */ /* OPFVF without GVEC IR */
@ -2503,7 +2516,8 @@ static bool opfv_check(DisasContext *s, arg_rmr *a)
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s) && vext_check_isa_ill(s) &&
/* OPFV instructions ignore vs1 check */ /* OPFV instructions ignore vs1 check */
vext_check_ss(s, a->rd, a->rs2, a->vm); vext_check_ss(s, a->rd, a->rs2, a->vm) &&
require_zve64f(s);
} }
static bool do_opfv(DisasContext *s, arg_rmr *a, static bool do_opfv(DisasContext *s, arg_rmr *a,
@ -2568,7 +2582,8 @@ static bool opfvv_cmp_check(DisasContext *s, arg_rmrr *a)
return require_rvv(s) && return require_rvv(s) &&
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s) && vext_check_isa_ill(s) &&
vext_check_mss(s, a->rd, a->rs1, a->rs2); vext_check_mss(s, a->rd, a->rs1, a->rs2) &&
require_zve64f(s);
} }
GEN_OPFVV_TRANS(vmfeq_vv, opfvv_cmp_check) GEN_OPFVV_TRANS(vmfeq_vv, opfvv_cmp_check)
@ -2581,7 +2596,8 @@ static bool opfvf_cmp_check(DisasContext *s, arg_rmrr *a)
return require_rvv(s) && return require_rvv(s) &&
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s) && vext_check_isa_ill(s) &&
vext_check_ms(s, a->rd, a->rs2); vext_check_ms(s, a->rd, a->rs2) &&
require_zve64f(s);
} }
GEN_OPFVF_TRANS(vmfeq_vf, opfvf_cmp_check) GEN_OPFVF_TRANS(vmfeq_vf, opfvf_cmp_check)
@ -2602,7 +2618,8 @@ static bool trans_vfmv_v_f(DisasContext *s, arg_vfmv_v_f *a)
if (require_rvv(s) && if (require_rvv(s) &&
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s) && vext_check_isa_ill(s) &&
require_align(a->rd, s->lmul)) { require_align(a->rd, s->lmul) &&
require_zve64f(s)) {
gen_set_rm(s, RISCV_FRM_DYN); gen_set_rm(s, RISCV_FRM_DYN);
TCGv_i64 t1; TCGv_i64 t1;
@ -3328,7 +3345,8 @@ static bool trans_vfmv_f_s(DisasContext *s, arg_vfmv_f_s *a)
{ {
if (require_rvv(s) && if (require_rvv(s) &&
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s)) { vext_check_isa_ill(s) &&
require_zve64f(s)) {
gen_set_rm(s, RISCV_FRM_DYN); gen_set_rm(s, RISCV_FRM_DYN);
unsigned int ofs = (8 << s->sew); unsigned int ofs = (8 << s->sew);
@ -3354,7 +3372,8 @@ static bool trans_vfmv_s_f(DisasContext *s, arg_vfmv_s_f *a)
{ {
if (require_rvv(s) && if (require_rvv(s) &&
require_rvf(s) && require_rvf(s) &&
vext_check_isa_ill(s)) { vext_check_isa_ill(s) &&
require_zve64f(s)) {
gen_set_rm(s, RISCV_FRM_DYN); gen_set_rm(s, RISCV_FRM_DYN);
/* The instructions ignore LMUL and vector register group. */ /* The instructions ignore LMUL and vector register group. */
@ -3405,13 +3424,15 @@ GEN_OPIVI_TRANS(vslidedown_vi, IMM_ZX, vslidedown_vx, slidedown_check)
static bool fslideup_check(DisasContext *s, arg_rmrr *a) static bool fslideup_check(DisasContext *s, arg_rmrr *a)
{ {
return slideup_check(s, a) && return slideup_check(s, a) &&
require_rvf(s); require_rvf(s) &&
require_zve64f(s);
} }
static bool fslidedown_check(DisasContext *s, arg_rmrr *a) static bool fslidedown_check(DisasContext *s, arg_rmrr *a)
{ {
return slidedown_check(s, a) && return slidedown_check(s, a) &&
require_rvf(s); require_rvf(s) &&
require_zve64f(s);
} }
GEN_OPFVF_TRANS(vfslide1up_vf, fslideup_check) GEN_OPFVF_TRANS(vfslide1up_vf, fslideup_check)