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-rw-r--r--src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py b/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py
index 5be460232..1078c491f 100644
--- a/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py
+++ b/src/arch/x86/isa/insts/x87/transcendental_functions/logarithmic_functions.py
@@ -38,6 +38,10 @@
microcode = '''
# F2XM1
# FSCALE
-# FYL2X
+
+def macroop FYL2X {
+ yl2xfp st(1), st(0), st(1), spm=1
+};
+
# FYL2XP1
'''