Avoid partial register stall

diff --git a/ext/opcache/jit/zend_jit_x86.dasc b/ext/opcache/jit/zend_jit_x86.dasc
index bff24c41389d0683e7333d38d8361a6f1051e324..3166d14f3b248b1ab2bf5dc215fca4160115489d 100644 (file)
--- a/ext/opcache/jit/zend_jit_x86.dasc
+++ b/ext/opcache/jit/zend_jit_x86.dasc
@@ -602,8 +602,10 @@ static void* dasm_labels[zend_lb_MAX];
 |                      mov r0, lval
 |.endif
 ||                     if (JIT_G(opt_flags) & allowed_opt_flags & ZEND_JIT_CPU_AVX) {
+|                              vxorps xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0)
 |                              vcvtsi2sd, xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0), r0
 ||                     } else {
+|                              xorps xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0)
 |                              cvtsi2sd, xmm(reg-ZREG_XMM0), r0
 ||                     }
 ||             }
@@ -614,14 +616,18 @@ static void* dasm_labels[zend_lb_MAX];
 |              SSE_GET_LONG reg, Z_LVAL_P(Z_ZV(addr))
 ||     } else if (Z_MODE(addr) == IS_MEM_ZVAL) {
 ||             if (JIT_G(opt_flags) & allowed_opt_flags & ZEND_JIT_CPU_AVX) {
+|                      vxorps xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0)
 |                      vcvtsi2sd xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0), aword [Ra(Z_REG(addr))+Z_OFFSET(addr)]
 ||             } else {
+|                      xorps xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0)
 |                      cvtsi2sd xmm(reg-ZREG_XMM0), aword [Ra(Z_REG(addr))+Z_OFFSET(addr)]
 ||             }
 ||     } else if (Z_MODE(addr) == IS_REG) {
 ||             if (JIT_G(opt_flags) & allowed_opt_flags & ZEND_JIT_CPU_AVX) {
+|                      vxorps xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0)
 |                      vcvtsi2sd xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0), Ra(Z_REG(addr))
 ||             } else {
+|                      xorps xmm(reg-ZREG_XMM0), xmm(reg-ZREG_XMM0)
 |                      cvtsi2sd xmm(reg-ZREG_XMM0), Ra(Z_REG(addr))
 ||             }
 ||     } else {