[PATCH v3 03/24] tcg/i386: Move constraint type check to tcg_target_const_match

Richard Henderson posted 24 patches 3 years, 9 months ago
Maintainers: Huacai Chen <chenhuacai@kernel.org>, Stefan Weil <sw@weilnetz.de>, Palmer Dabbelt <palmer@dabbelt.com>, "Philippe Mathieu-Daudé" <f4bug@amsat.org>, Thomas Huth <thuth@redhat.com>, Aleksandar Rikalo <aleksandar.rikalo@syrmia.com>, Cornelia Huck <cohuck@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, Andrzej Zaborowski <balrogg@gmail.com>, Alistair Francis <Alistair.Francis@wdc.com>, Aurelien Jarno <aurelien@aurel32.net>, Jiaxun Yang <jiaxun.yang@flygoat.com>
[PATCH v3 03/24] tcg/i386: Move constraint type check to tcg_target_const_match
Posted by Richard Henderson 3 years, 9 months ago
Rather than check the type when filling in the constraint,
check it when matching the constant.  This removes the only
use of the type argument to target_parse_constraint.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/i386/tcg-target.c.inc | 28 +++++++++++++++++-----------
 1 file changed, 17 insertions(+), 11 deletions(-)

diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc
index 050f3cb0b1..540debdf34 100644
--- a/tcg/i386/tcg-target.c.inc
+++ b/tcg/i386/tcg-target.c.inc
@@ -263,13 +263,13 @@ static const char *target_parse_constraint(TCGArgConstraint *ct,
         break;
 
     case 'e':
-        ct->ct |= (type == TCG_TYPE_I32 ? TCG_CT_CONST : TCG_CT_CONST_S32);
+        ct->ct |= TCG_CT_CONST_S32;
         break;
     case 'Z':
-        ct->ct |= (type == TCG_TYPE_I32 ? TCG_CT_CONST : TCG_CT_CONST_U32);
+        ct->ct |= TCG_CT_CONST_U32;
         break;
     case 'I':
-        ct->ct |= (type == TCG_TYPE_I32 ? TCG_CT_CONST : TCG_CT_CONST_I32);
+        ct->ct |= TCG_CT_CONST_I32;
         break;
 
     default:
@@ -286,14 +286,20 @@ static inline int tcg_target_const_match(tcg_target_long val, TCGType type,
     if (ct & TCG_CT_CONST) {
         return 1;
     }
-    if ((ct & TCG_CT_CONST_S32) && val == (int32_t)val) {
-        return 1;
-    }
-    if ((ct & TCG_CT_CONST_U32) && val == (uint32_t)val) {
-        return 1;
-    }
-    if ((ct & TCG_CT_CONST_I32) && ~val == (int32_t)~val) {
-        return 1;
+    if (type == TCG_TYPE_I32) {
+        if (ct & (TCG_CT_CONST_S32 | TCG_CT_CONST_U32 | TCG_CT_CONST_I32)) {
+            return 1;
+        }
+    } else {
+        if ((ct & TCG_CT_CONST_S32) && val == (int32_t)val) {
+            return 1;
+        }
+        if ((ct & TCG_CT_CONST_U32) && val == (uint32_t)val) {
+            return 1;
+        }
+        if ((ct & TCG_CT_CONST_I32) && ~val == (int32_t)~val) {
+            return 1;
+        }
     }
     if ((ct & TCG_CT_CONST_WSZ) && val == (type == TCG_TYPE_I32 ? 32 : 64)) {
         return 1;
-- 
2.25.1


Re: [PATCH v3 03/24] tcg/i386: Move constraint type check to tcg_target_const_match
Posted by Peter Maydell 3 years, 9 months ago
On Fri, 29 Jan 2021 at 20:13, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Rather than check the type when filling in the constraint,
> check it when matching the constant.  This removes the only
> use of the type argument to target_parse_constraint.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>  tcg/i386/tcg-target.c.inc | 28 +++++++++++++++++-----------

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>

thanks
-- PMM