Make bt_translate_and_run use regparm(3).

nelhage · Nov 29, 2010 · d8087c1 · d8087c1
1 parent 2420b45
commit d8087c1
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Showing 2 changed files with 10 additions and 9 deletions.
diff --git a/bt.cpp b/bt.cpp
@@ -44,7 +44,7 @@ extern "C" void bt_continue_chain(void);
 extern "C" void bt_continue_ic(void);
 extern "C" void bt_interrupt(void);
 
-extern "C" void bt_translate_and_run(beta_cpu *cpu, uint32_t used, ccbuff chainptr) __attribute__((noreturn, used));
+extern "C" void bt_translate_and_run(beta_cpu *cpu, uint32_t used, ccbuff chainptr) __attribute__((noreturn, used, regparm(3)));
 static ccbuff bt_translate_frag(compiled_frag *cfrag, decode_frag *frag);
 
 /*

diff --git a/bt_helper.S b/bt_helper.S
@@ -17,10 +17,9 @@ _(bt_interrupt):
         mov _(bt_stack_base), %esp
         movl %ebp, %eax
         call _(bt_process_interrupt)
-        subl $4, %esp
-        pushl $0
-        pushl $0
-        pushl %ebp
+        xorl %edx, %edx
+        xorl %ecx, %ecx
+        movl %ebp, %eax
         call _(bt_translate_and_run)
 
 _(bt_continue):
@@ -44,14 +43,16 @@ miss:
         pushl $0
 _(bt_continue_chain):
         mov %eax, 128(%ebp)
-        pushl $1
-        pushl %ebp
+        popl %ecx
+        movl $1, %edx
+        movl %ebp, %eax
         call _(bt_translate_and_run)
 
 _(bt_continue_ic):
         mov %eax, 128(%ebp)
-        pushl $0
-        pushl %ebp
+        popl %ecx
+        xorl %edx, %edx
+        movl %ebp, %eax
         call _(bt_translate_and_run)
 
 _(bt_enter):