[PATCH 08/22] x86-64: implement INSN_CMP_*

[Eduard - Gabriel Munteanu]

This implements emitters for INSN_CMP_* instructions.

Signed-off-by: Eduard - Gabriel Munteanu <eduard.munte...@linux360.ro>
---
 arch/x86/emit-code.c |   38 ++++++++++++++++++++++++++++++++++++++
 1 files changed, 38 insertions(+), 0 deletions(-)

diff --git a/arch/x86/emit-code.c b/arch/x86/emit-code.c
index 46c586a..c54f428 100644
--- a/arch/x86/emit-code.c
+++ b/arch/x86/emit-code.c
@@ -2165,10 +2165,48 @@ static void emit_mov_reg_memlocal(struct buffer *buf,
        __emit_reg_membase(buf, 1, 0x89, src_reg, REG_RBP, disp);
 }
 
+static void __emit_cmp_imm_reg(struct buffer *buf,
+                              int rex_w,
+                              long imm,
+                              enum machine_reg reg)
+{
+       emit_alu_imm_reg(buf, rex_w, 0x07, imm, reg);
+}
+
+static void emit_cmp_imm_reg(struct buffer *buf,
+                            struct operand *src,
+                            struct operand *dest)
+{
+       int rex_w = is_64bit_reg(dest);
+
+       __emit_cmp_imm_reg(buf, rex_w, src->imm, mach_reg(&dest->reg));
+}
+
+static void emit_cmp_membase_reg(struct buffer *buf,
+                                struct operand *src,
+                                struct operand *dest)
+{
+       int rex_w = is_64bit_reg(dest);
+
+       emit_membase_reg(buf, rex_w, 0x3b, src, dest);
+}
+
+static void emit_cmp_reg_reg(struct buffer *buf,
+                            struct operand *src,
+                            struct operand *dest)
+{
+       int rex_w = is_64bit_bin_reg_op(src, dest);
+
+       emit_reg_reg(buf, rex_w, 0x39, src, dest);
+}
+
 struct emitter emitters[] = {
        GENERIC_X86_EMITTERS,
        DECL_EMITTER(INSN_ADD_IMM_REG, emit_add_imm_reg, TWO_OPERANDS),
        DECL_EMITTER(INSN_ADD_REG_REG, emit_add_reg_reg, TWO_OPERANDS),
+       DECL_EMITTER(INSN_CMP_IMM_REG, emit_cmp_imm_reg, TWO_OPERANDS),
+       DECL_EMITTER(INSN_CMP_MEMBASE_REG, emit_cmp_membase_reg, TWO_OPERANDS),
+       DECL_EMITTER(INSN_CMP_REG_REG, emit_cmp_reg_reg, TWO_OPERANDS),
        DECL_EMITTER(INSN_MOV_IMM_REG, emit_mov_imm_reg, TWO_OPERANDS),
        DECL_EMITTER(INSN_MOV_MEMBASE_REG, emit_mov_membase_reg, TWO_OPERANDS),
        DECL_EMITTER(INSN_MOV_MEMLOCAL_REG, emit_mov_memlocal_reg, 
TWO_OPERANDS),
-- 
1.6.0.6


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