From 50f67e95e2de0ce145f76ccc480057c9c683a0c7 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Juha=20Riihim=C3=A4ki?= <juha.riihimaki@nokia.com>
Date: Mon, 26 Oct 2009 09:01:07 +0200
Subject: [PATCH] target-arm: fix neon shift helper functions
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

Current code is broken at least on recent compilers, comparison
between signed and unsigned types yield incorrect code and render
the neon shift helper functions defunct. This is the third revision
of this patch, casting all comparisons with the sizeof operator to
signed ssize_t type to force comparisons to be between signed integral
types.

Signed-off-by: Juha Riihimäki <juha.riihimaki@nokia.com>
Acked-by: Laurent Desnogues <laurent.desnogues@gmail.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
---
 target-arm/neon_helper.c | 26 ++++++++++++++------------
 1 file changed, 14 insertions(+), 12 deletions(-)

diff --git a/target-arm/neon_helper.c b/target-arm/neon_helper.c
index f32ecd6e29..5e6452b9d9 100644
--- a/target-arm/neon_helper.c
+++ b/target-arm/neon_helper.c
@@ -392,7 +392,8 @@ NEON_VOP(abd_u32, neon_u32, 1)
 #define NEON_FN(dest, src1, src2) do { \
     int8_t tmp; \
     tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8 || tmp <= -sizeof(src1) * 8) { \
+    if (tmp >= (ssize_t)sizeof(src1) * 8 || \
+        tmp <= -(ssize_t)sizeof(src1) * 8) { \
         dest = 0; \
     } else if (tmp < 0) { \
         dest = src1 >> -tmp; \
@@ -420,9 +421,9 @@ uint64_t HELPER(neon_shl_u64)(uint64_t val, uint64_t shiftop)
 #define NEON_FN(dest, src1, src2) do { \
     int8_t tmp; \
     tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8) { \
+    if (tmp >= (ssize_t)sizeof(src1) * 8) { \
         dest = 0; \
-    } else if (tmp <= -sizeof(src1) * 8) { \
+    } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
         dest = src1 >> (sizeof(src1) * 8 - 1); \
     } else if (tmp < 0) { \
         dest = src1 >> -tmp; \
@@ -453,11 +454,11 @@ uint64_t HELPER(neon_shl_s64)(uint64_t valop, uint64_t shiftop)
 #define NEON_FN(dest, src1, src2) do { \
     int8_t tmp; \
     tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8) { \
+    if (tmp >= (ssize_t)sizeof(src1) * 8) { \
         dest = 0; \
-    } else if (tmp < -sizeof(src1) * 8) { \
+    } else if (tmp < -(ssize_t)sizeof(src1) * 8) { \
         dest = src1 >> (sizeof(src1) * 8 - 1); \
-    } else if (tmp == -sizeof(src1) * 8) { \
+    } else if (tmp == -(ssize_t)sizeof(src1) * 8) { \
         dest = src1 >> (tmp - 1); \
         dest++; \
         dest >>= 1; \
@@ -494,9 +495,10 @@ uint64_t HELPER(neon_rshl_s64)(uint64_t valop, uint64_t shiftop)
 #define NEON_FN(dest, src1, src2) do { \
     int8_t tmp; \
     tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8 || tmp < -sizeof(src1) * 8) { \
+    if (tmp >= (ssize_t)sizeof(src1) * 8 || \
+        tmp < -(ssize_t)sizeof(src1) * 8) { \
         dest = 0; \
-    } else if (tmp == -sizeof(src1) * 8) { \
+    } else if (tmp == -(ssize_t)sizeof(src1) * 8) { \
         dest = src1 >> (tmp - 1); \
     } else if (tmp < 0) { \
         dest = (src1 + (1 << (-1 - tmp))) >> -tmp; \
@@ -528,14 +530,14 @@ uint64_t HELPER(neon_rshl_u64)(uint64_t val, uint64_t shiftop)
 #define NEON_FN(dest, src1, src2) do { \
     int8_t tmp; \
     tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8) { \
+    if (tmp >= (ssize_t)sizeof(src1) * 8) { \
         if (src1) { \
             SET_QC(); \
             dest = ~0; \
         } else { \
             dest = 0; \
         } \
-    } else if (tmp <= -sizeof(src1) * 8) { \
+    } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
         dest = 0; \
     } else if (tmp < 0) { \
         dest = src1 >> -tmp; \
@@ -579,11 +581,11 @@ uint64_t HELPER(neon_qshl_u64)(CPUState *env, uint64_t val, uint64_t shiftop)
 #define NEON_FN(dest, src1, src2) do { \
     int8_t tmp; \
     tmp = (int8_t)src2; \
-    if (tmp >= sizeof(src1) * 8) { \
+    if (tmp >= (ssize_t)sizeof(src1) * 8) { \
         if (src1) \
             SET_QC(); \
         dest = src1 >> 31; \
-    } else if (tmp <= -sizeof(src1) * 8) { \
+    } else if (tmp <= -(ssize_t)sizeof(src1) * 8) { \
         dest = src1 >> 31; \
     } else if (tmp < 0) { \
         dest = src1 >> -tmp; \