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| author | Jan Beulich <jbeulich@suse.com> | 2024-06-28 08:18:40 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2024-06-28 08:18:40 +0200 |
| commit | 0868b8999bbca960781e7d8bbbc363536193a694 (patch) | |
| tree | a8ab13e006208fe1ba79ec127b413e67c39a0a35 /opcodes/i386-tbl.h | |
| parent | f63d85cc78e73e7df93e6eedc953a08b713cfa43 (diff) | |
| download | gdb-0868b8999bbca960781e7d8bbbc363536193a694.zip gdb-0868b8999bbca960781e7d8bbbc363536193a694.tar.gz gdb-0868b8999bbca960781e7d8bbbc363536193a694.tar.bz2 | |
x86/APX: optimize {nf} forms of ADD/SUB with specific immediates
Unlike for the legacy forms, where there's a difference in the resulting
EFLAGS, for the NF variants we can safely replace ones using 0x80 by the
respectively other insn while negating the immediate, saving 3 immediate
bytes (just 1 though for 16-bit operand size). Similarly we can replace
ones using 1 / -1 by INC/DEC (eliminating the immediate).
Diffstat (limited to 'opcodes/i386-tbl.h')
| -rw-r--r-- | opcodes/i386-tbl.h | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/opcodes/i386-tbl.h b/opcodes/i386-tbl.h index 974a86c..17cf8dc 100644 --- a/opcodes/i386-tbl.h +++ b/opcodes/i386-tbl.h @@ -826,7 +826,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_add, 0x83, 3, SPACE_EVEXMAP4, 0, { 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, @@ -848,7 +848,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_add, 0x83, 2, SPACE_EVEXMAP4, 0, { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, @@ -868,7 +868,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 0, 0 } } } }, { MN_add, 0x80, 3, SPACE_EVEXMAP4, 0, { 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, @@ -890,7 +890,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_add, 0x80, 2, SPACE_EVEXMAP4, 0, { 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, @@ -1356,7 +1356,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_sub, 0x83, 3, SPACE_EVEXMAP4, 5, { 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, @@ -1378,7 +1378,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_sub, 0x83, 2, SPACE_EVEXMAP4, 5, { 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, @@ -1398,7 +1398,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 0, 0 } } } }, { MN_sub, 0x80, 3, SPACE_EVEXMAP4, 5, { 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 3, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, @@ -1420,7 +1420,7 @@ static const insn_template i386_optab[] = 0, 0, 0, 0, 1, 0 } } } }, { MN_sub, 0x80, 2, SPACE_EVEXMAP4, 5, { 0, 1, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, - 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0 }, { { 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0 } }, { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 } }, |