Revert "Fix #79595: zend_init_fpu() alters FPU precision"

This reverts commit 88dfc47.

Author: nikic

NEWS

@@ -8,7 +8,6 @@ PHP                                                                        NEWS
   . Fixed bug #79489 (.user.ini does not inherit). (cmb)
   . Fixed bug #79600 (Regression in 7.4.6 when yielding an array based
     generator). (Nikita)
-  . Fixed bug #79595 (zend_init_fpu() alters FPU precision). (cmb, Nikita)
 
 - FFI:
   . Fixed bug #79571 (FFI: var_dumping unions may segfault). (cmb)

Zend/zend_float.c

@@ -22,8 +22,7 @@
 
 ZEND_API void zend_init_fpu(void) /* {{{ */
 {
-/* under __SSE__ the FPCW is irrelevant; no need to change it */
-#if XPFPA_HAVE_CW && !defined(__SSE__)
+#if XPFPA_HAVE_CW
 	XPFPA_DECLARE
 
 	if (!EG(saved_fpu_cw_ptr)) {
@@ -39,7 +38,7 @@ ZEND_API void zend_init_fpu(void) /* {{{ */
 
 ZEND_API void zend_shutdown_fpu(void) /* {{{ */
 {
-#if XPFPA_HAVE_CW && !defined(__SSE__)
+#if XPFPA_HAVE_CW
 	if (EG(saved_fpu_cw_ptr)) {
 		XPFPA_RESTORE_CW(EG(saved_fpu_cw_ptr));
 	}
@@ -50,10 +49,8 @@ ZEND_API void zend_shutdown_fpu(void) /* {{{ */
 
 ZEND_API void zend_ensure_fpu_mode(void) /* {{{ */
 {
-#ifndef __SSE__
 	XPFPA_DECLARE
 
 	XPFPA_SWITCH_DOUBLE();
-#endif
 }
 /* }}} */