[Qemu-devel] [PATCH 07/11] TCG/Sparc64: use stack for TCG temps

[Blue Swirl]

Use stack instead of temp_buf array in CPUState for TCG temps.

On Sparc64, stack pointer is not aligned but there is a fixed bias of 2047,
so don't try to enforce alignment.

Signed-off-by: Blue Swirl <address@hidden>
---
 tcg/sparc/tcg-target.c |    7 ++++---
 tcg/tcg.c              |    2 ++
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/tcg/sparc/tcg-target.c b/tcg/sparc/tcg-target.c
index 3dd3696..1a3969a 100644
--- a/tcg/sparc/tcg-target.c
+++ b/tcg/sparc/tcg-target.c
@@ -693,8 +693,11 @@ static void tcg_out_setcond2_i32(TCGContext *s,
TCGCond cond, TCGArg ret,
 /* Generate global QEMU prologue and epilogue code */
 static void tcg_target_qemu_prologue(TCGContext *s)
 {
+    tcg_set_frame(s, TCG_REG_I6, TCG_TARGET_CALL_STACK_OFFSET,
+                  CPU_TEMP_BUF_NLONGS * (int)sizeof(long));
     tcg_out32(s, SAVE | INSN_RD(TCG_REG_O6) | INSN_RS1(TCG_REG_O6) |
-              INSN_IMM13(-TCG_TARGET_STACK_MINFRAME));
+              INSN_IMM13(-(TCG_TARGET_STACK_MINFRAME +
+                           CPU_TEMP_BUF_NLONGS * (int)sizeof(long))));
     tcg_out32(s, JMPL | INSN_RD(TCG_REG_G0) | INSN_RS1(TCG_REG_I0) |
               INSN_RS2(TCG_REG_G0));
     tcg_out_nop(s);
@@ -1566,6 +1569,4 @@ static void tcg_target_init(TCGContext *s)
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_O6);
     tcg_regset_set_reg(s->reserved_regs, TCG_REG_O7);
     tcg_add_target_add_op_defs(sparc_op_defs);
-    tcg_set_frame(s, TCG_AREG0, offsetof(CPUState, temp_buf),
-                  CPU_TEMP_BUF_NLONGS * sizeof(long));
 }
diff --git a/tcg/tcg.c b/tcg/tcg.c
index 75972c3..82316ab 100644
--- a/tcg/tcg.c
+++ b/tcg/tcg.c
@@ -1434,9 +1434,11 @@ static void temp_allocate_frame(TCGContext *s, int temp)
 {
     TCGTemp *ts;
     ts = &s->temps[temp];
+#ifndef __sparc_v9__ /* Sparc64 stack is accessed with offset of 2047 */
     s->current_frame_offset = (s->current_frame_offset +
                                (tcg_target_long)sizeof(tcg_target_long) - 1) &
         ~(sizeof(tcg_target_long) - 1);
+#endif
     if (s->current_frame_offset + (tcg_target_long)sizeof(tcg_target_long) >
         s->frame_end) {
         tcg_abort();
-- 
1.6.2.4

0007-TCG-Sparc64-use-stack-for-TCG-temps.patch
Description: Text Data