From: Jim MacArthur <jim.macarthur@linaro.org>
Date: Tue, 30 Jun 2026 13:16:33 +0000 (+0100)
Subject: target/arm/tcg: Allow vector FP conversions with FPRCVT
X-Git-Tag: v11.1.0-rc0~26^2~44
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=bb336e518b703d104fe367e7c9e402a2fb2379f9;p=thirdparty%2Fqemu.git

target/arm/tcg: Allow vector FP conversions with FPRCVT

FEAT_FPRCVT allows the vector forms of FCVTXX and [US]CVTF in streaming
mode which would otherwise only be available in nonstreaming mode.

Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Jim MacArthur <jim.macarthur@linaro.org>
Message-id: 20260630-jmac-fprcvt-v3-2-f4840d5e0a7f@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
---

diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 0da365e345..2821c84843 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -9915,7 +9915,14 @@ static bool do_cvtf_f(DisasContext *s, arg_fcvt *a, MemOp src_mop_int,
                       bool is_signed)
 {
     TCGv_i64 tcg_int;
-    int check = fp_access_check_scalar_hsd(s, a->esz);
+    int check;
+
+    /* FEAT_FPRCVT allows vector forms in streaming mode */
+    if (dc_isar_feature(aa64_fprcvt, s)) {
+        s->is_nonstreaming = false;
+    }
+
+    check = fp_access_check_scalar_hsd(s, a->esz);
 
     if (check <= 0) {
         return check == 0;
@@ -10073,7 +10080,14 @@ static bool do_fcvt_f(DisasContext *s, arg_fcvt *a,
                       ARMFPRounding rmode, MemOp dst_mop_int, bool is_signed)
 {
     TCGv_i64 tcg_int;
-    int check = fp_access_check_scalar_hsd(s, a->esz);
+    int check;
+
+    /* FEAT_FPRCVT allows vector forms in streaming mode */
+    if (dc_isar_feature(aa64_fprcvt, s)) {
+        s->is_nonstreaming = false;
+    }
+
+    check = fp_access_check_scalar_hsd(s, a->esz);
 
     if (check <= 0) {
         return check == 0;