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Fix s16_16.23_8.11 field signedness

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Sebastian Schmidt
2020-01-04 16:06:01 +01:00
parent b6866f44ef
commit 210fe20433
1 changed files with 3 additions and 6 deletions
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9
data/languages/xtensa.sinc
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@@ -67,7 +67,7 @@ define token insn(24)
u1_12 = (12,12)
u4_8.11 = (8,11)
u8_4.11 = (4,11)
# s4_8.11 = (8,11) signed
s4_8.11 = (8,11) signed
u2_6.7 = (6,7)
u3_5.7 = (5,7)
u4_4.7 = (4,7)
@@ -138,11 +138,8 @@ u5_4.7_12: tmp is u1_12 & u4_4.7 [ tmp = (u1_12 << 4) | u4_4.7; ] { export *
u5_8.11_4: tmp is u1_4 & u4_8.11 [ tmp = (u1_4 << 4) | u4_8.11; ] { export *[const]:1 tmp; }
# Signed 12-bit (extended to 16) immediate, used by MOVI.
s16_16.23_8.11: tmp is u4_8.11 & u8_16.23 [
# FIXME: This table, and the fields used, should be signed, but using s4_8.11 and s8_16.23
# somehow confuses Ghidra.
tmp = (0xf000 * (u4_8.11 >> 3)) | # Sign-extend.
(u4_8.11 << 8) | u8_16.23;
s16_16.23_8.11: tmp is s4_8.11 & u8_16.23 [
tmp = (s4_8.11 << 8) | u8_16.23;
] { export *[const]:2 tmp; }
# An “asymmetric” immediate from -32..95, used by MOVI.N.