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[PATCH 19/19] target/arm: Split VMINMAXNM decode
From: |
Richard Henderson |
Subject: |
[PATCH 19/19] target/arm: Split VMINMAXNM decode |
Date: |
Fri, 14 Feb 2020 10:15:47 -0800 |
Passing the raw op field from the manual is less instructive
than it might be. Do the full decode and use the existing
helpers to perform the expansion.
Since these are v8 insns, VECLEN+VECSTRIDE are already RES0.
Signed-off-by: Richard Henderson <address@hidden>
---
target/arm/vfp-uncond.decode | 12 ++--
target/arm/translate-vfp.inc.c | 109 +++++++++++----------------------
2 files changed, 44 insertions(+), 77 deletions(-)
diff --git a/target/arm/vfp-uncond.decode b/target/arm/vfp-uncond.decode
index 5af1f2ee66..34ca164266 100644
--- a/target/arm/vfp-uncond.decode
+++ b/target/arm/vfp-uncond.decode
@@ -41,15 +41,19 @@
%vd_dp 22:1 12:4
%vd_sp 12:4 22:1
+@vfp_dnm_s ................................ vm=%vm_sp vn=%vn_sp vd=%vd_sp
+@vfp_dnm_d ................................ vm=%vm_dp vn=%vn_dp vd=%vd_dp
+
VSEL 1111 1110 0. cc:2 .... .... 1010 .0.0 .... \
vm=%vm_sp vn=%vn_sp vd=%vd_sp dp=0
VSEL 1111 1110 0. cc:2 .... .... 1011 .0.0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp dp=1
-VMINMAXNM 1111 1110 1.00 .... .... 1010 . op:1 .0 .... \
- vm=%vm_sp vn=%vn_sp vd=%vd_sp dp=0
-VMINMAXNM 1111 1110 1.00 .... .... 1011 . op:1 .0 .... \
- vm=%vm_dp vn=%vn_dp vd=%vd_dp dp=1
+VMAXNM_sp 1111 1110 1.00 .... .... 1010 .0.0 .... @vfp_dnm_s
+VMINNM_sp 1111 1110 1.00 .... .... 1010 .1.0 .... @vfp_dnm_s
+
+VMAXNM_dp 1111 1110 1.00 .... .... 1011 .0.0 .... @vfp_dnm_d
+VMINNM_dp 1111 1110 1.00 .... .... 1011 .1.0 .... @vfp_dnm_d
VRINT 1111 1110 1.11 10 rm:2 .... 1010 01.0 .... \
vm=%vm_sp vd=%vd_sp dp=0
diff --git a/target/arm/translate-vfp.inc.c b/target/arm/translate-vfp.inc.c
index b5f3feaf8d..2cf85e73cf 100644
--- a/target/arm/translate-vfp.inc.c
+++ b/target/arm/translate-vfp.inc.c
@@ -322,79 +322,6 @@ static bool trans_VSEL(DisasContext *s, arg_VSEL *a)
return true;
}
-static bool trans_VMINMAXNM(DisasContext *s, arg_VMINMAXNM *a)
-{
- uint32_t rd, rn, rm;
- bool dp = a->dp;
- bool vmin = a->op;
- TCGv_ptr fpst;
-
- if (!dc_isar_feature(aa32_vminmaxnm, s)) {
- return false;
- }
-
- if (dp && !dc_isar_feature(aa32_fpdp_v2, s)) {
- return false;
- }
-
- /* UNDEF accesses to D16-D31 if they don't exist */
- if (dp && !dc_isar_feature(aa32_simd_r32, s) &&
- ((a->vm | a->vn | a->vd) & 0x10)) {
- return false;
- }
-
- rd = a->vd;
- rn = a->vn;
- rm = a->vm;
-
- if (!vfp_access_check(s)) {
- return true;
- }
-
- fpst = get_fpstatus_ptr(0);
-
- if (dp) {
- TCGv_i64 frn, frm, dest;
-
- frn = tcg_temp_new_i64();
- frm = tcg_temp_new_i64();
- dest = tcg_temp_new_i64();
-
- neon_load_reg64(frn, rn);
- neon_load_reg64(frm, rm);
- if (vmin) {
- gen_helper_vfp_minnumd(dest, frn, frm, fpst);
- } else {
- gen_helper_vfp_maxnumd(dest, frn, frm, fpst);
- }
- neon_store_reg64(dest, rd);
- tcg_temp_free_i64(frn);
- tcg_temp_free_i64(frm);
- tcg_temp_free_i64(dest);
- } else {
- TCGv_i32 frn, frm, dest;
-
- frn = tcg_temp_new_i32();
- frm = tcg_temp_new_i32();
- dest = tcg_temp_new_i32();
-
- neon_load_reg32(frn, rn);
- neon_load_reg32(frm, rm);
- if (vmin) {
- gen_helper_vfp_minnums(dest, frn, frm, fpst);
- } else {
- gen_helper_vfp_maxnums(dest, frn, frm, fpst);
- }
- neon_store_reg32(dest, rd);
- tcg_temp_free_i32(frn);
- tcg_temp_free_i32(frm);
- tcg_temp_free_i32(dest);
- }
-
- tcg_temp_free_ptr(fpst);
- return true;
-}
-
/*
* Table for converting the most common AArch32 encoding of
* rounding mode to arm_fprounding order (which matches the
@@ -1784,6 +1711,42 @@ static bool trans_VDIV_dp(DisasContext *s, arg_VDIV_dp
*a)
return do_vfp_3op_dp(s, gen_helper_vfp_divd, a->vd, a->vn, a->vm, false);
}
+static bool trans_VMINNM_sp(DisasContext *s, arg_VMINNM_sp *a)
+{
+ if (!dc_isar_feature(aa32_vminmaxnm, s)) {
+ return false;
+ }
+ return do_vfp_3op_sp(s, gen_helper_vfp_minnums,
+ a->vd, a->vn, a->vm, false);
+}
+
+static bool trans_VMAXNM_sp(DisasContext *s, arg_VMAXNM_sp *a)
+{
+ if (!dc_isar_feature(aa32_vminmaxnm, s)) {
+ return false;
+ }
+ return do_vfp_3op_sp(s, gen_helper_vfp_maxnums,
+ a->vd, a->vn, a->vm, false);
+}
+
+static bool trans_VMINNM_dp(DisasContext *s, arg_VMINNM_dp *a)
+{
+ if (!dc_isar_feature(aa32_vminmaxnm, s)) {
+ return false;
+ }
+ return do_vfp_3op_dp(s, gen_helper_vfp_minnumd,
+ a->vd, a->vn, a->vm, false);
+}
+
+static bool trans_VMAXNM_dp(DisasContext *s, arg_VMAXNM_dp *a)
+{
+ if (!dc_isar_feature(aa32_vminmaxnm, s)) {
+ return false;
+ }
+ return do_vfp_3op_dp(s, gen_helper_vfp_maxnumd,
+ a->vd, a->vn, a->vm, false);
+}
+
static bool do_vfm_sp(DisasContext *s, arg_VFMA_sp *a, bool neg_n, bool neg_d)
{
/*
--
2.20.1
- [PATCH 15/19] linux-user/arm: Replace ARM_FEATURE_VFP* tests for HWCAP, (continued)
- [PATCH 15/19] linux-user/arm: Replace ARM_FEATURE_VFP* tests for HWCAP, Richard Henderson, 2020/02/14
- [PATCH 14/19] target/arm: Move the vfp decodetree calls next to the base isa, Richard Henderson, 2020/02/14
- [PATCH 16/19] target/arm: Remove ARM_FEATURE_VFP*, Richard Henderson, 2020/02/14
- [PATCH 18/19] target/arm: Split VFM decode, Richard Henderson, 2020/02/14
- [PATCH 17/19] target/arm: Add formats for some vfp 2 and 3-register insns, Richard Henderson, 2020/02/14
- [PATCH 19/19] target/arm: Split VMINMAXNM decode,
Richard Henderson <=
- Re: [PATCH 00/19] target/arm: vfp feature and decodetree cleanup, no-reply, 2020/02/14
- Re: [PATCH 00/19] target/arm: vfp feature and decodetree cleanup, Peter Maydell, 2020/02/20