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@ -127,9 +127,7 @@ along with RandomX. If not, see<http://www.gnu.org/licenses/>.
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void rx_reset_float_state() {
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setRoundMode_(FE_TONEAREST);
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#ifdef RANDOMX_USE_X87
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_control87(_PC_53, _MCW_PC); //set x87 precision to 53 bits
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#endif
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rx_set_double_precision(); //set precision to 53 bits if needed by the platform
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}
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void rx_set_rounding_mode(uint32_t mode) {
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@ -153,6 +151,28 @@ void rx_set_rounding_mode(uint32_t mode) {
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#endif
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#ifdef RANDOMX_USE_X87
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#ifdef _M_IX86
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void rx_set_double_precision() {
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_control87(_PC_53, _MCW_PC);
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}
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#elif defined(__i386)
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void rx_set_double_precision() {
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uint16_t volatile x87cw;
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asm volatile("fstcw %0" : "=m" (x87cw));
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x87cw &= ~0x300;
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x87cw |= 0x200;
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asm volatile("fldcw %0" : : "m" (x87cw));
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}
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#endif
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#endif //RANDOMX_USE_X87
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union double_ser_t {
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double f;
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uint64_t i;
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