Changed sqrt.s to use x86 asm version of sqrt

2012-10-23 19:01:42 +11:00 · 2012-10-23 19:01:42 +11:00 · 6e8b92d8bc
parent cf1ea3484e
commit 6e8b92d8bc
1 changed files with 12 additions and 1 deletions
--- a/System/Interpreter/Interpreter
+++ b/System/Interpreter/Interpreter
@ -2036,7 +2036,18 @@ void R4300iOp::COP1_S_DIV (void) {
 void R4300iOp::COP1_S_SQRT (void) {
 	TEST_COP1_USABLE_EXCEPTION
 	_controlfp(*_RoundingModel,_MCW_RC);
-	*(float *)_FPR_S[m_Opcode.fd] = (float)sqrt(*(float *)_FPR_S[m_Opcode.fs]);
+	
+	float * Dest = (float *)_FPR_S[m_Opcode.fd];
+	float * Source = (float *)_FPR_S[m_Opcode.fs];
+	_asm {
+		push esi
+		mov esi, dword ptr [Source]
+		fld dword ptr [esi]
+		fsqrt
+		mov esi, dword ptr [Dest]
+		fstp dword ptr [esi]
+		pop esi
+	}
 }

 void R4300iOp::COP1_S_ABS (void) {