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Fix #79595: zend_init_fpu() alters FPU precision #5602

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Fix #79595: zend_init_fpu() alters FPU precision #5602

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Fix #79595: zend_init_fpu() alters FPU precision
cmb69 May 20, 2020
66cb2ea
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cmb69 May 22, 2020
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7 changes: 5 additions & 2 deletions Zend/zend_float.c
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Original file line number Diff line number Diff line change
Expand Up @@ -22,7 +22,8 @@

ZEND_API void zend_init_fpu(void) /* {{{ */
{
#if XPFPA_HAVE_CW
/* under __SSE__ the FPCW is irrelevant; no need to change it */
#if XPFPA_HAVE_CW && !defined(__SSE__)
XPFPA_DECLARE

if (!EG(saved_fpu_cw_ptr)) {
Expand All @@ -38,7 +39,7 @@ ZEND_API void zend_init_fpu(void) /* {{{ */

ZEND_API void zend_shutdown_fpu(void) /* {{{ */
{
#if XPFPA_HAVE_CW
#if XPFPA_HAVE_CW && !defined(__SSE__)
if (EG(saved_fpu_cw_ptr)) {
XPFPA_RESTORE_CW(EG(saved_fpu_cw_ptr));
}
Expand All @@ -49,8 +50,10 @@ ZEND_API void zend_shutdown_fpu(void) /* {{{ */

ZEND_API void zend_ensure_fpu_mode(void) /* {{{ */
{
#ifndef __SSE__
XPFPA_DECLARE

XPFPA_SWITCH_DOUBLE();
#endif
}
/* }}} */