From 94470c7e544a8086b02aa12e7361b64bacb44ee6 Mon Sep 17 00:00:00 2001
From: Vitaly Novichkov <admin@wohlnet.ru>
Date: Tue, 19 Jun 2018 22:42:42 +0300
Subject: Fixed DJGPP build

---
 src/adlmidi_midiplay.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'src/adlmidi_midiplay.cpp')

diff --git a/src/adlmidi_midiplay.cpp b/src/adlmidi_midiplay.cpp
index f52d936..0a4639a 100644
--- a/src/adlmidi_midiplay.cpp
+++ b/src/adlmidi_midiplay.cpp
@@ -2463,7 +2463,7 @@ void MIDIplay::UpdatePortamento(unsigned MidCh)
     double rate = HUGE_VAL;
     uint16_t midival = Ch[MidCh].portamento;
     if(Ch[MidCh].portamentoEnable && midival > 0)
-        rate = 350.0 * std::exp2(-0.062 * (1.0 / 128) * midival);
+        rate = 350.0 * std::pow(2.0, -0.062 * (1.0 / 128) * midival);
     Ch[MidCh].portamentoRate = rate;
 }
 
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