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Support for gcc to generate 16-bit i386 code. (.code16gcc)

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This commit is contained in:
Alan Modra
1999-08-04 10:07:41 +00:00
parent 59350e7176
commit 0274eb115d
2 changed files with 40 additions and 25 deletions
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6
include/opcode/ChangeLog
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@@ -1,3 +1,9 @@
1999-08-04 Alan Modra <alan@spri.levels.unisa.edu.au>
* i386.h (i386_optab): Add DefaultSize modifier to all insns
that implicitly modify %esp. #undef d_Suf, x_suf, sld_suf,
sldx_suf, bwld_Suf, d_FP, x_FP, sld_FP, sldx_FP at end of table.
Wed Jul 28 02:04:24 1999 Jerry Quinn <jquinn@nortelnetworks.com>
Jeff Law <law@cygnus.com>

59
include/opcode/i386.h
View File

@@ -105,23 +105,23 @@ static const template i386_optab[] = {
{"movzx", 2, 0x0fb6, X, b_Suf|Modrm, { Reg8|ByteMem, WordReg, 0} },
/* push instructions */
{"push", 1, 0x50, X, wl_Suf|ShortForm, { WordReg, 0, 0 } },
{"push", 1, 0xff, 6, wl_Suf|Modrm, { WordReg|WordMem, 0, 0 } },
{"push", 1, 0x6a, X, wl_Suf, { Imm8S, 0, 0} },
{"push", 1, 0x68, X, wl_Suf, { Imm16|Imm32, 0, 0} },
{"push", 1, 0x06, X, wl_Suf|Seg2ShortForm, { SReg2, 0, 0 } },
{"push", 1, 0x0fa0, X, wl_Suf|Seg3ShortForm, { SReg3, 0, 0 } },
{"push", 1, 0x50, X, wl_Suf|ShortForm|DefaultSize, { WordReg, 0, 0 } },
{"push", 1, 0xff, 6, wl_Suf|Modrm|DefaultSize, { WordReg|WordMem, 0, 0 } },
{"push", 1, 0x6a, X, wl_Suf|DefaultSize, { Imm8S, 0, 0} },
{"push", 1, 0x68, X, wl_Suf|DefaultSize, { Imm16|Imm32, 0, 0} },
{"push", 1, 0x06, X, wl_Suf|Seg2ShortForm|DefaultSize, { SReg2, 0, 0 } },
{"push", 1, 0x0fa0, X, wl_Suf|Seg3ShortForm|DefaultSize, { SReg3, 0, 0 } },
/* push all */
{"pusha", 0, 0x60, X, wl_Suf, { 0, 0, 0 } },
{"pusha", 0, 0x60, X, wl_Suf|DefaultSize, { 0, 0, 0 } },
/* pop instructions */
{"pop", 1, 0x58, X, wl_Suf|ShortForm, { WordReg, 0, 0 } },
{"pop", 1, 0x8f, 0, wl_Suf|Modrm, { WordReg|WordMem, 0, 0 } },
{"pop", 1, 0x58, X, wl_Suf|ShortForm|DefaultSize, { WordReg, 0, 0 } },
{"pop", 1, 0x8f, 0, wl_Suf|Modrm|DefaultSize, { WordReg|WordMem, 0, 0 } },
#define POP_SEG_SHORT 0x07
{"pop", 1, 0x07, X, wl_Suf|Seg2ShortForm, { SReg2, 0, 0 } },
{"pop", 1, 0x0fa1, X, wl_Suf|Seg3ShortForm, { SReg3, 0, 0 } },
{"pop", 1, 0x07, X, wl_Suf|Seg2ShortForm|DefaultSize, { SReg2, 0, 0 } },
{"pop", 1, 0x0fa1, X, wl_Suf|Seg3ShortForm|DefaultSize, { SReg3, 0, 0 } },
/* pop all */
{"popa", 0, 0x61, X, wl_Suf, { 0, 0, 0 } },
{"popa", 0, 0x61, X, wl_Suf|DefaultSize, { 0, 0, 0 } },
/* xchg exchange instructions
xchg commutes: we allow both operand orders */
@@ -158,8 +158,8 @@ static const template i386_optab[] = {
{"cmc", 0, 0xf5, X, NoSuf, { 0, 0, 0} },
{"lahf", 0, 0x9f, X, NoSuf, { 0, 0, 0} },
{"sahf", 0, 0x9e, X, NoSuf, { 0, 0, 0} },
{"pushf", 0, 0x9c, X, wl_Suf, { 0, 0, 0} },
{"popf", 0, 0x9d, X, wl_Suf, { 0, 0, 0} },
{"pushf", 0, 0x9c, X, wl_Suf|DefaultSize, { 0, 0, 0} },
{"popf", 0, 0x9d, X, wl_Suf|DefaultSize, { 0, 0, 0} },
{"stc", 0, 0xf9, X, NoSuf, { 0, 0, 0} },
{"std", 0, 0xfd, X, NoSuf, { 0, 0, 0} },
{"sti", 0, 0xfb, X, NoSuf, { 0, 0, 0} },
@@ -311,12 +311,12 @@ static const template i386_optab[] = {
{"sar", 1, 0xd0, 7, bwl_Suf|W|Modrm, { Reg|AnyMem, 0, 0} },
/* control transfer instructions */
{"call", 1, 0xe8, X, wl_Suf|JumpDword, { Disp16|Disp32, 0, 0} },
{"call", 1, 0xff, 2, wl_Suf|Modrm, { WordReg|WordMem|JumpAbsolute, 0, 0} },
{"call", 1, 0xe8, X, wl_Suf|JumpDword|DefaultSize, { Disp16|Disp32, 0, 0} },
{"call", 1, 0xff, 2, wl_Suf|Modrm|DefaultSize, { WordReg|WordMem|JumpAbsolute, 0, 0} },
/* Intel Syntax */
{"call", 2, 0x9a, X, wl_Suf|JumpInterSegment, { Imm16, Imm16|Imm32, 0} },
{"lcall", 2, 0x9a, X, wl_Suf|JumpInterSegment, { Imm16, Imm16|Imm32, 0} },
{"lcall", 1, 0xff, 3, wl_Suf|Modrm, { WordMem, 0, 0} },
{"call", 2, 0x9a, X, wl_Suf|JumpInterSegment|DefaultSize, { Imm16, Imm16|Imm32, 0} },
{"lcall", 2, 0x9a, X, wl_Suf|JumpInterSegment|DefaultSize, { Imm16, Imm16|Imm32, 0} },
{"lcall", 1, 0xff, 3, wl_Suf|Modrm|DefaultSize, { WordMem, 0, 0} },
#define JUMP_PC_RELATIVE 0xeb
{"jmp", 1, 0xeb, X, NoSuf|Jump, { Disp, 0, 0} },
@@ -327,12 +327,12 @@ static const template i386_optab[] = {
{"ljmp", 2, 0xea, X, wl_Suf|JumpInterSegment, { Imm16, Imm16|Imm32, 0} },
{"ljmp", 1, 0xff, 5, wl_Suf|Modrm, { WordMem, 0, 0} },
{"ret", 0, 0xc3, X, wl_Suf, { 0, 0, 0} },
{"ret", 1, 0xc2, X, wl_Suf, { Imm16, 0, 0} },
{"lret", 0, 0xcb, X, wl_Suf, { 0, 0, 0} },
{"lret", 1, 0xca, X, wl_Suf, { Imm16, 0, 0} },
{"enter", 2, 0xc8, X, wl_Suf, { Imm16, Imm8, 0} },
{"leave", 0, 0xc9, X, wl_Suf, { 0, 0, 0} },
{"ret", 0, 0xc3, X, wl_Suf|DefaultSize, { 0, 0, 0} },
{"ret", 1, 0xc2, X, wl_Suf|DefaultSize, { Imm16, 0, 0} },
{"lret", 0, 0xcb, X, wl_Suf|DefaultSize, { 0, 0, 0} },
{"lret", 1, 0xca, X, wl_Suf|DefaultSize, { Imm16, 0, 0} },
{"enter", 2, 0xc8, X, wl_Suf|DefaultSize, { Imm16, Imm8, 0} },
{"leave", 0, 0xc9, X, wl_Suf|DefaultSize, { 0, 0, 0} },
/* conditional jumps */
{"jo", 1, 0x70, X, NoSuf|Jump, { Disp, 0, 0} },
@@ -1035,14 +1035,23 @@ static const template i386_optab[] = {
#undef b_Suf
#undef w_Suf
#undef l_Suf
#undef d_Suf
#undef x_Suf
#undef bw_Suf
#undef bl_Suf
#undef wl_Suf
#undef sl_Suf
#undef sld_Suf
#undef sldx_Suf
#undef bwl_Suf
#undef bwld_Suf
#undef FP
#undef l_FP
#undef d_FP
#undef x_FP
#undef sl_FP
#undef sld_FP
#undef sldx_FP
#define MAX_MNEM_SIZE 16 /* for parsing insn mnemonics from input */