X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=deps%2Flightning%2Flib%2Fjit_x86-cpu.c;h=76f90ec871add4ac03fdfad9d43ff4755ee1bf99;hb=016c6e93f6db684211f5c8b05433cb500715ba50;hp=44f5b45bc7f44df71f2f5b2a76e2fc67a79bdf46;hpb=ba86ff938a6b17c171dd68ebdf897ca3e30550f8;p=pcsx_rearmed.git

diff --git a/deps/lightning/lib/jit_x86-cpu.c b/deps/lightning/lib/jit_x86-cpu.c
index 44f5b45b..76f90ec8 100644
--- a/deps/lightning/lib/jit_x86-cpu.c
+++ b/deps/lightning/lib/jit_x86-cpu.c
@@ -2243,8 +2243,14 @@ _xrshr(jit_state_t *_jit, jit_bool_t sign,
     else
 	t3 = r3;
     /* Bits to shift left */
-    if (sign)
+    if (sign) {
 	rshi(t1, t2, __WORDSIZE - 1);
+	/* Special case for negative value and zero shift */
+	alui(X86_CMP, t3, 0);
+	zero = jnes(_jit->pc.w);
+	movi(t1, 0);
+	patch_at(zero, _jit->pc.w);
+    }
     else
 	movi(t1, 0);
     /* Shift in %RCX */
@@ -2261,7 +2267,7 @@ _xrshr(jit_state_t *_jit, jit_bool_t sign,
     /* Must swap results if shift value is __WORDSIZE */
     alui(X86_CMP, t3, __WORDSIZE);
     over = jes(_jit->pc.w);
-    /* Already zero or sign extended if shift value is zero */
+    /* Already zero  if shift value is zero */
     alui(X86_CMP, t3, 0);
     zero = jes(_jit->pc.w);
     /* Calculate bits to shift left and fill high register */
@@ -2296,10 +2302,7 @@ _xrshi(jit_state_t *_jit, jit_bool_t sign,
 {
     if (i0 == 0) {
 	movr(r0, r2);
-	if (sign)
-	    rshi(r1, r2, __WORDSIZE - 1);
-	else
-	    movi(r1, 0);
+	movi(r1, 0);
     }
     else if (i0 == __WORDSIZE) {
 	movr(r1, r2);