Add decode constants.

[firearm.git] / ARM_Constants.v

diff --git a/ARM_Constants.v b/ARM_Constants.v
index bbde7be9344dbae177a7a82d04f490c317c5f215..6a54819a58632ce7590e91cb25f75e72fba1452e 100644 (file)
--- a/ARM_Constants.v
+++ b/ARM_Constants.v
@@ -8,9 +8,64 @@
 `define COND_VC 4'b0111        /* V clear */
 `define COND_HI 4'b1000        /* C set and Z clear */
 `define COND_LS 4'b1001        /* C clear or Z set */
-`define COND_GT 4'b1010        /* N equal to V */
+`define COND_GE 4'b1010        /* N equal to V */
 `define COND_LT 4'b1011        /* N not equal to V */
 `define COND_GT 4'b1100 /* Z clear AND (N equals V) */
 `define COND_LE 4'b1101        /* Z set OR (N not equals V) */
 `define COND_AL 4'b1110        /* TRUE */
 `define COND_NV 4'b1111        /* FALSE */
+
+`define COND_MATTERS(x) ((x != `COND_AL) && (x != `COND_NV))
+
+`define ALU_AND 4'b0000
+`define ALU_EOR 4'b0001
+`define ALU_SUB 4'b0010
+`define ALU_RSB 4'b0011
+`define ALU_ADD 4'b0100
+`define ALU_ADC 4'b0101
+`define ALU_SBC 4'b0110
+`define ALU_RSC 4'b0111
+`define ALU_TST 4'b1000
+`define ALU_TEQ 4'b1001
+`define ALU_CMP 4'b1010
+`define ALU_CMN 4'b1011
+`define ALU_ORR 4'b1100
+`define ALU_MOV 4'b1101
+`define ALU_BIC 4'b1110
+`define ALU_MVN 4'b1111
+
+`define SHIFT_LSL 2'b00
+`define SHIFT_LSR 2'b01
+`define SHIFT_ASR 2'b10
+`define SHIFT_ROR 2'b11
+
+`define CPSR_N 31
+`define CPSR_Z 30
+`define CPSR_C 29
+`define CPSR_V 28
+`define CPSR_I 7
+`define CPSR_F 6
+
+`define SHIFT_LSL 2'b00
+`define SHIFT_LSR 2'b01
+`define SHIFT_ASR 2'b10
+`define SHIFT_ROR 2'b11
+
+`define DECODE_ALU_MULT                32'b????000000??????????????1001????    /* Multiply -- must come before ALU, because it pattern matches a specific case of ALU */
+`define DECODE_ALU_MUL_LONG    32'b????00001???????????????1001????    /* Multiply long */
+`define DECODE_ALU_MRS         32'b????00010?001111????000000000000    /* MRS (Transfer PSR to register) */
+`define DECODE_ALU_MSR         32'b????00010?101001111100000000????    /* MSR (Transfer register to PSR) */
+`define DECODE_ALU_MSR_FLAGS   32'b????00?10?1010001111????????????    /* MSR (Transfer register or immediate to PSR, flag bits only) */
+`define DECODE_ALU_SWP         32'b????00010?00????????00001001????    /* Atomic swap */
+`define DECODE_ALU_BX          32'b????000100101111111111110001????    /* Branch and exchange */
+`define DECODE_ALU_HDATA_REG   32'b????000??0??????????00001??1????    /* Halfword transfer - register offset */
+`define DECODE_ALU_HDATA_IMM   32'b????000??1??????????00001??1????    /* Halfword transfer - immediate offset */
+`define DECODE_ALU             32'b????00??????????????????????????    /* ALU */
+`define DECODE_LDRSTR_UNDEFINED        32'b????011????????????????????1????    /* Undefined. I hate ARM */
+`define DECODE_LDRSTR          32'b????01??????????????????????????    /* Single data transfer */
+`define DECODE_LDMSTM          32'b????100?????????????????????????    /* Block data transfer */
+`define DECODE_BRANCH          32'b????101?????????????????????????    /* Branch */
+`define DECODE_LDCSTC          32'b????110?????????????????????????    /* Coprocessor data transfer */
+`define DECODE_CDP             32'b????1110???????????????????0????    /* Coprocessor data op */
+`define DECODE_MRCMCR          32'b????1110???????????????????1????    /* Coprocessor register transfer */
+`define DECODE_SWI             32'b????1111????????????????????????    /* SWI */