rand/rand-x86ish.S: Hoist argument register allocation outside.

This will soon be shared with another entry point for `rdseed'.

diff --git a/rand/rand-x86ish.S b/rand/rand-x86ish.S
index 36176258d76f23c67d83a0b45fbce547863a4407..70907feb8b3d7b8616998ec63dbf4a8fe5798b1c 100644 (file)
--- a/rand/rand-x86ish.S
+++ b/rand/rand-x86ish.S
@@ -37,6 +37,17 @@
 ///--------------------------------------------------------------------------
 /// Quick random generation.
 
 ///--------------------------------------------------------------------------
 /// Quick random generation.
 

+// Common register allocation.
+#if CPUFAM_X86
+#  define COUNT ecx
+#endif
+#if CPUFAM_AMD64 && ABI_SYSV
+#  define COUNT ecx
+#endif
+#if CPUFAM_AMD64 && ABI_WIN
+#  define COUNT r8d
+#endif
+

 FUNC(rand_quick_x86ish_rdrand)
        // Enter with a pointer to the random context in the first argument.
        // Return zero on success, or -1 on error.
 FUNC(rand_quick_x86ish_rdrand)
        // Enter with a pointer to the random context in the first argument.
        // Return zero on success, or -1 on error.


@@ -44,15 +55,12 @@ FUNC(rand_quick_x86ish_rdrand)
 #if CPUFAM_X86
        mov     edx, [SP + 4]
        stalloc 28
 #if CPUFAM_X86
        mov     edx, [SP + 4]
        stalloc 28

-#  define COUNT ecx

 #endif
 #if CPUFAM_AMD64 && ABI_SYSV
        stalloc 8
 #endif
 #if CPUFAM_AMD64 && ABI_SYSV
        stalloc 8

-#  define COUNT ecx

 #endif
 #if CPUFAM_AMD64 && ABI_WIN
        stalloc 40
 #endif
 #if CPUFAM_AMD64 && ABI_WIN
        stalloc 40

-#  define COUNT r8d

 #endif
   endprologue
 
 #endif
   endprologue
 


@@ -104,9 +112,8 @@ FUNC(rand_quick_x86ish_rdrand)
        stfree  40
 #endif
        ret
        stfree  40
 #endif
        ret

+ENDFUNC

 
 #undef COUNT
 
 
 #undef COUNT
 

-ENDFUNC
-

 ///----- That's all, folks --------------------------------------------------
 ///----- That's all, folks --------------------------------------------------