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authorMichael Clark <mjc@sifive.com>2019-03-16 01:20:28 +0000
committerPalmer Dabbelt <palmer@sifive.com>2019-03-19 05:14:39 -0700
commitc124c152428559216c5d083e11a35e51f773c007 (patch)
treeeab91cd368bdffb76b054e9e8d4f4b6f6fa3b54e /disas
parente3e7039cc24ecf47d81c091e8bb04552d6564ad8 (diff)
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RISC-V: Remove unnecessary disassembler constraints
Remove machine generated constraints that are not referenced by the pseudo-instruction constraints. Cc: Palmer Dabbelt <palmer@sifive.com> Cc: Sagar Karandikar <sagark@eecs.berkeley.edu> Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de> Cc: Alistair Francis <Alistair.Francis@wdc.com> Signed-off-by: Michael Clark <mjc@sifive.com> Signed-off-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'disas')
-rw-r--r--disas/riscv.c138
1 files changed, 0 insertions, 138 deletions
diff --git a/disas/riscv.c b/disas/riscv.c
index 7fd1019..27546dd 100644
--- a/disas/riscv.c
+++ b/disas/riscv.c
@@ -87,33 +87,10 @@ typedef enum {
typedef enum {
rvc_end,
- rvc_simm_6,
- rvc_imm_6,
- rvc_imm_7,
- rvc_imm_8,
- rvc_imm_9,
- rvc_imm_10,
- rvc_imm_12,
- rvc_imm_18,
- rvc_imm_nz,
- rvc_imm_x2,
- rvc_imm_x4,
- rvc_imm_x8,
- rvc_imm_x16,
- rvc_rd_b3,
- rvc_rs1_b3,
- rvc_rs2_b3,
- rvc_rd_eq_rs1,
rvc_rd_eq_ra,
- rvc_rd_eq_sp,
rvc_rd_eq_x0,
- rvc_rs1_eq_sp,
rvc_rs1_eq_x0,
rvc_rs2_eq_x0,
- rvc_rd_ne_x0_x2,
- rvc_rd_ne_x0,
- rvc_rs1_ne_x0,
- rvc_rs2_ne_x0,
rvc_rs2_eq_rs1,
rvc_rs1_eq_ra,
rvc_imm_eq_zero,
@@ -2522,111 +2499,16 @@ static bool check_constraints(rv_decode *dec, const rvc_constraint *c)
uint8_t rd = dec->rd, rs1 = dec->rs1, rs2 = dec->rs2;
while (*c != rvc_end) {
switch (*c) {
- case rvc_simm_6:
- if (!(imm >= -32 && imm < 32)) {
- return false;
- }
- break;
- case rvc_imm_6:
- if (!(imm <= 63)) {
- return false;
- }
- break;
- case rvc_imm_7:
- if (!(imm <= 127)) {
- return false;
- }
- break;
- case rvc_imm_8:
- if (!(imm <= 255)) {
- return false;
- }
- break;
- case rvc_imm_9:
- if (!(imm <= 511)) {
- return false;
- }
- break;
- case rvc_imm_10:
- if (!(imm <= 1023)) {
- return false;
- }
- break;
- case rvc_imm_12:
- if (!(imm <= 4095)) {
- return false;
- }
- break;
- case rvc_imm_18:
- if (!(imm <= 262143)) {
- return false;
- }
- break;
- case rvc_imm_nz:
- if (!(imm != 0)) {
- return false;
- }
- break;
- case rvc_imm_x2:
- if (!((imm & 0b1) == 0)) {
- return false;
- }
- break;
- case rvc_imm_x4:
- if (!((imm & 0b11) == 0)) {
- return false;
- }
- break;
- case rvc_imm_x8:
- if (!((imm & 0b111) == 0)) {
- return false;
- }
- break;
- case rvc_imm_x16:
- if (!((imm & 0b1111) == 0)) {
- return false;
- }
- break;
- case rvc_rd_b3:
- if (!(rd >= 8 && rd <= 15)) {
- return false;
- }
- break;
- case rvc_rs1_b3:
- if (!(rs1 >= 8 && rs1 <= 15)) {
- return false;
- }
- break;
- case rvc_rs2_b3:
- if (!(rs2 >= 8 && rs2 <= 15)) {
- return false;
- }
- break;
- case rvc_rd_eq_rs1:
- if (!(rd == rs1)) {
- return false;
- }
- break;
case rvc_rd_eq_ra:
if (!(rd == 1)) {
return false;
}
break;
- case rvc_rd_eq_sp:
- if (!(rd == 2)) {
- return false;
- }
- break;
case rvc_rd_eq_x0:
if (!(rd == 0)) {
return false;
}
break;
- case rvc_rs1_eq_sp:
- if (!(rs1 == 2)) {
- return false;
- }
- break;
case rvc_rs1_eq_x0:
if (!(rs1 == 0)) {
return false;
@@ -2637,26 +2519,6 @@ static bool check_constraints(rv_decode *dec, const rvc_constraint *c)
return false;
}
break;
- case rvc_rd_ne_x0_x2:
- if (!(rd != 0 && rd != 2)) {
- return false;
- }
- break;
- case rvc_rd_ne_x0:
- if (!(rd != 0)) {
- return false;
- }
- break;
- case rvc_rs1_ne_x0:
- if (!(rs1 != 0)) {
- return false;
- }
- break;
- case rvc_rs2_ne_x0:
- if (!(rs2 != 0)) {
- return false;
- }
- break;
case rvc_rs2_eq_rs1:
if (!(rs2 == rs1)) {
return false;