Fix the sign of cos(2*n+1)

Also fix the license text.
hrydgard · Feb 19, 2023 · 6b89aad · 6b89aad
1 parent a5de1e9
commit 6b89aad
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diff --git a/Core/MIPS/MIPSVFPUUtils.cpp b/Core/MIPS/MIPSVFPUUtils.cpp
@@ -993,7 +993,6 @@ float vfpu_sin(float x) {
 	return (sign ? -1.0f : +1.0f) * float(int32_t(ret)) * 3.7252903e-09f; // 0x1p-28f
 }
 
-// WARNING: not tested.
 float vfpu_cos(float x) {
 	uint32_t bits;
 	memcpy(&bits, &x, sizeof(x));
@@ -1022,7 +1021,7 @@ float vfpu_cos(float x) {
 	}
 	sign ^= ((significand << 7) & 0x80000000u);
 	significand &= 0x00FFFFFFu;
-	if(significand > 0x00800000u) {
+	if(significand >= 0x00800000u) {
 		significand = 0x01000000u - significand;
 		sign ^= 0x80000000u;
 	}

diff --git a/Core/MIPS/vfpu_sin_lut.h b/Core/MIPS/vfpu_sin_lut.h
@@ -1,4 +1,4 @@
-// Copyright (c) 2012- PPSSPP Project.
+// Copyright (c) 2023- PPSSPP Project.
 
 // This program is free software: you can redistribute it and/or modify
 // it under the terms of the GNU General Public License as published by