[PATCH v3 21/57] tcg/i386: Use full load/store helpers in user-only mode

[Richard Henderson]

Instead of using helper_unaligned_{ld,st}, use the full load/store helpers.
This will allow the fast path to increase alignment to implement atomicity
while not immediately raising an alignment exception.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 tcg/i386/tcg-target.c.inc | 48 ++-------------------------------------
 1 file changed, 2 insertions(+), 46 deletions(-)

diff --git a/tcg/i386/tcg-target.c.inc b/tcg/i386/tcg-target.c.inc
index 696c656f3b..32ef9ad4e4 100644
--- a/tcg/i386/tcg-target.c.inc
+++ b/tcg/i386/tcg-target.c.inc
@@ -1778,7 +1778,6 @@ typedef struct {
     int seg;
 } HostAddress;
 
-#if defined(CONFIG_SOFTMMU)
 /*
  * Because i686 has no register parameters and because x86_64 has xchg
  * to handle addr/data register overlap, we have placed all input arguments
@@ -1846,51 +1845,8 @@ static bool tcg_out_qemu_st_slow_path(TCGContext *s, 
TCGLabelQemuLdst *l)
     tcg_out_jmp(s, l->raddr);
     return true;
 }
-#else
-static bool tcg_out_fail_alignment(TCGContext *s, TCGLabelQemuLdst *l)
-{
-    /* resolve label address */
-    tcg_patch32(l->label_ptr[0], s->code_ptr - l->label_ptr[0] - 4);
-
-    if (TCG_TARGET_REG_BITS == 32) {
-        int ofs = 0;
-
-        tcg_out_st(s, TCG_TYPE_PTR, TCG_AREG0, TCG_REG_ESP, ofs);
-        ofs += 4;
-
-        tcg_out_st(s, TCG_TYPE_I32, l->addrlo_reg, TCG_REG_ESP, ofs);
-        ofs += 4;
-        if (TARGET_LONG_BITS == 64) {
-            tcg_out_st(s, TCG_TYPE_I32, l->addrhi_reg, TCG_REG_ESP, ofs);
-            ofs += 4;
-        }
-
-        tcg_out_pushi(s, (uintptr_t)l->raddr);
-    } else {
-        tcg_out_mov(s, TCG_TYPE_TL, tcg_target_call_iarg_regs[1],
-                    l->addrlo_reg);
-        tcg_out_mov(s, TCG_TYPE_PTR, tcg_target_call_iarg_regs[0], TCG_AREG0);
-
-        tcg_out_movi(s, TCG_TYPE_PTR, TCG_REG_RAX, (uintptr_t)l->raddr);
-        tcg_out_push(s, TCG_REG_RAX);
-    }
-
-    /* "Tail call" to the helper, with the return address back inline. */
-    tcg_out_jmp(s, (const void *)(l->is_ld ? helper_unaligned_ld
-                                  : helper_unaligned_st));
-    return true;
-}
-
-static bool tcg_out_qemu_ld_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
-{
-    return tcg_out_fail_alignment(s, l);
-}
-
-static bool tcg_out_qemu_st_slow_path(TCGContext *s, TCGLabelQemuLdst *l)
-{
-    return tcg_out_fail_alignment(s, l);
-}
 
+#ifndef CONFIG_SOFTMMU
 static HostAddress x86_guest_base = {
     .index = -1
 };
@@ -1922,7 +1878,7 @@ static inline int setup_guest_base_seg(void)
     return 0;
 }
 #endif /* setup_guest_base_seg */
-#endif /* SOFTMMU */
+#endif /* !SOFTMMU */
 
 /*
  * For softmmu, perform the TLB load and compare.
-- 
2.34.1