From 2186d5f3f95cd74a070a490d899291648d58667a Mon Sep 17 00:00:00 2001
From: Steven Fuller <relnev@icculus.org>
Date: Sun, 1 Jul 2001 00:55:22 +0000
Subject: Initial revision

---
 src/win95/pentime.h | 64 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 src/win95/pentime.h

(limited to 'src/win95/pentime.h')

diff --git a/src/win95/pentime.h b/src/win95/pentime.h
new file mode 100644
index 0000000..8c66961
--- /dev/null
+++ b/src/win95/pentime.h
@@ -0,0 +1,64 @@
+/* pentime.h */
+extern unsigned long int rdtsc_lo(void);
+extern unsigned long int rdtsc_hi(void);
+extern unsigned long int rdtsc_mid(void);
+
+#define ProfileStart() \
+{						   \
+	int time = rdtsc_lo();
+#define ProfileStop(x) \
+	textprint("%s %d\n",x,rdtsc_lo()-time); \
+}
+
+#pragma aux rdtsc_lo = \
+	"db 0fh, 31h"	\
+	value [eax]		\
+	modify [edx];
+
+#pragma aux rdtsc_hi = \
+	"db 0fh, 31h"	\
+	value [edx]		\
+	modify [eax];
+
+#pragma aux rdtsc_mid = \
+	"db 0fh, 31h"	\
+	"shr eax, 10h" \
+	"shl edx, 10h" \
+	"add eax, edx" \
+	value [eax]		\
+	modify [edx];
+
+/* Test to see if we have a Pentium or not. Note that this test is reliable 
+ * enough for a tools project (where we can put in an overide switch) but not
+ * for a released product.
+ */
+extern unsigned char Pentium(void);
+#pragma aux Pentium = \
+					"pushfd" \
+					"pop eax" \
+					"or eax, 00200000h" \
+					"push eax" \
+					"popfd" \
+					"pushfd" \
+					"pop eax" \
+					"mov ecx, eax" \
+					"and eax, 00200000h" \
+					"cmp eax, 0" \
+					"je not_Pentium" \
+					"mov eax, ecx" \
+					"and eax, 0ffdfffffh" \
+					"push eax" \
+					"popfd" \
+					"pushfd" \
+					"pop eax" \
+					"and eax, 00200000h" \
+					"cmp eax, 0" \
+					"jne not_Pentium" \
+	"is_Pentium: 	 mov al, 1" \
+					"jmp finish" \
+	"not_Pentium:    mov al, 0" \
+	"finish: 		 nop" \
+					value [al] \
+					modify [eax ecx]
+
+
-- 
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