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From: Greg Kurz <gkurz@linux.vnet.ibm.com>
To: Alexander Graf <agraf@suse.de>,
	David Gibson <david@gibson.dropbear.id.au>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
	qemu-ppc@nongnu.org, Anton Blanchard <anton@samba.org>,
	qemu-devel@nongnu.org
Subject: [Qemu-devel] [PATCH 4/7] target-ppc: gdbstub: introduce avr_need_swap()
Date: Fri, 15 Jan 2016 16:00:31 +0100	[thread overview]
Message-ID: <20160115150031.17358.58444.stgit@bahia.huguette.org> (raw)
In-Reply-To: <20160115150005.17358.43294.stgit@bahia.huguette.org>

This helper will be used to support Altivec registers in little-endian guests.
This patch does not change functionnality.

Note: I had to put the helper some lines away from the gdb_*_avr_reg()
routines to get a more readable patch.

Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com>
---
 target-ppc/translate_init.c |   37 +++++++++++++++++++++++--------------
 1 file changed, 23 insertions(+), 14 deletions(-)

diff --git a/target-ppc/translate_init.c b/target-ppc/translate_init.c
index d31d7f6e9bd8..18e9e561561f 100644
--- a/target-ppc/translate_init.c
+++ b/target-ppc/translate_init.c
@@ -8751,6 +8751,15 @@ static void dump_ppc_insns (CPUPPCState *env)
 }
 #endif
 
+static bool avr_need_swap(CPUPPCState *env)
+{
+#ifdef HOST_WORDS_BIGENDIAN
+    return false;
+#else
+    return true;
+#endif
+}
+
 static int gdb_get_float_reg(CPUPPCState *env, uint8_t *mem_buf, int n)
 {
     if (n < 32) {
@@ -8784,13 +8793,13 @@ static int gdb_set_float_reg(CPUPPCState *env, uint8_t *mem_buf, int n)
 static int gdb_get_avr_reg(CPUPPCState *env, uint8_t *mem_buf, int n)
 {
     if (n < 32) {
-#ifdef HOST_WORDS_BIGENDIAN
-        stq_p(mem_buf, env->avr[n].u64[0]);
-        stq_p(mem_buf+8, env->avr[n].u64[1]);
-#else
-        stq_p(mem_buf, env->avr[n].u64[1]);
-        stq_p(mem_buf+8, env->avr[n].u64[0]);
-#endif
+        if (!avr_need_swap(env)) {
+            stq_p(mem_buf, env->avr[n].u64[0]);
+            stq_p(mem_buf+8, env->avr[n].u64[1]);
+        } else {
+            stq_p(mem_buf, env->avr[n].u64[1]);
+            stq_p(mem_buf+8, env->avr[n].u64[0]);
+        }
         return 16;
     }
     if (n == 32) {
@@ -8807,13 +8816,13 @@ static int gdb_get_avr_reg(CPUPPCState *env, uint8_t *mem_buf, int n)
 static int gdb_set_avr_reg(CPUPPCState *env, uint8_t *mem_buf, int n)
 {
     if (n < 32) {
-#ifdef HOST_WORDS_BIGENDIAN
-        env->avr[n].u64[0] = ldq_p(mem_buf);
-        env->avr[n].u64[1] = ldq_p(mem_buf+8);
-#else
-        env->avr[n].u64[1] = ldq_p(mem_buf);
-        env->avr[n].u64[0] = ldq_p(mem_buf+8);
-#endif
+        if (!avr_need_swap(env)) {
+            env->avr[n].u64[0] = ldq_p(mem_buf);
+            env->avr[n].u64[1] = ldq_p(mem_buf+8);
+        } else {
+            env->avr[n].u64[1] = ldq_p(mem_buf);
+            env->avr[n].u64[0] = ldq_p(mem_buf+8);
+        }
         return 16;
     }
     if (n == 32) {

  parent reply	other threads:[~2016-01-15 15:00 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-01-15 15:00 [Qemu-devel] [PATCH 0/7] target-ppc: gdbstub: endiannes fixes and VSX support Greg Kurz
2016-01-15 15:00 ` [Qemu-devel] [PATCH 1/7] target-ppc: kvm: fix floating point registers sync on little-endian hosts Greg Kurz
2016-01-18  2:16   ` David Gibson
2016-01-18  8:51     ` Greg Kurz
2016-01-19  0:55       ` David Gibson
2016-01-19 12:10         ` Greg Kurz
2016-01-15 15:00 ` [Qemu-devel] [PATCH 2/7] target-ppc: rename and export maybe_bswap_register() Greg Kurz
2016-01-15 15:00 ` [Qemu-devel] [PATCH 3/7] target-ppc: gdbstub: fix float registers for little-endian guests Greg Kurz
2016-01-15 15:00 ` Greg Kurz [this message]
2016-01-15 15:00 ` [Qemu-devel] [PATCH 5/7] target-ppc: gdbstub: fix altivec " Greg Kurz
2016-01-18  2:25   ` David Gibson
2016-01-19  9:59     ` Greg Kurz
2016-01-20  2:13       ` [Qemu-devel] [Qemu-ppc] " David Gibson
2016-01-20  7:55         ` Greg Kurz
2016-01-15 15:00 ` [Qemu-devel] [PATCH 6/7] target-ppc: gdbstub: fix spe " Greg Kurz
2016-01-15 15:00 ` [Qemu-devel] [PATCH 7/7] target-ppc: gdbstub: Add VSX support Greg Kurz
  -- strict thread matches above, loose matches on Subject: below --
2015-12-18 10:18 [Qemu-devel] [PATCH 0/7] target-ppc: endian fixes for KVM and gdbstub Greg Kurz
2015-12-18 10:18 ` [Qemu-devel] [PATCH 4/7] target-ppc: gdbstub: introduce avr_need_swap() Greg Kurz

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