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| author | Aleksandar Markovic <amarkovic@wavecomp.com> | 2018-12-26 18:46:28 +0100 |
|---|---|---|
| committer | Aleksandar Markovic <amarkovic@wavecomp.com> | 2019-01-03 17:52:52 +0100 |
| commit | eabf76a0d46b7c2330881c9a65ef03ea70f01920 (patch) | |
| tree | 0e2a4dd59619aedce4724fe243138c10427601e2 /disas/nanomips.cpp | |
| parent | dffcf177dcfb789118f4eb519e088435d62ae42d (diff) | |
| download | qemu-eabf76a0d46b7c2330881c9a65ef03ea70f01920.zip qemu-eabf76a0d46b7c2330881c9a65ef03ea70f01920.tar.gz qemu-eabf76a0d46b7c2330881c9a65ef03ea70f01920.tar.bz2 | |
disas: nanoMIPS: Reorder declarations and definitions of gpr decoders
Reorder declarations and definitions of gpr decoders by number of
input bits of corresponding encoding type.
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Diffstat (limited to 'disas/nanomips.cpp')
| -rw-r--r-- | disas/nanomips.cpp | 200 |
1 files changed, 100 insertions, 100 deletions
diff --git a/disas/nanomips.cpp b/disas/nanomips.cpp index 23556b4..d6632bb 100644 --- a/disas/nanomips.cpp +++ b/disas/nanomips.cpp @@ -292,6 +292,77 @@ uint64 NMD::renumber_registers(uint64 index, uint64 *register_list, /* + * NMD::decode_gpr_gpr4() - decoder for 'gpr4' gpr encoding type + * + * Map a 4-bit code to the 5-bit register space according to this pattern: + * + * 1 0 + * 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | └---------------┐ + * | | | | | | | | | | └---------------┐ | + * | | | | | | | | | └---------------┐ | | + * | | | | | | | | └---------------┐ | | | + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | | | | | + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * 3 2 1 0 + * + * Used in handling following instructions: + * + * - ADDU[4X4] + * - LW[4X4] + * - MOVEP[REV] + * - MUL[4X4] + * - SW[4X4] + */ +uint64 NMD::decode_gpr_gpr4(uint64 d) +{ + static uint64 register_list[] = { 8, 9, 10, 11, 4, 5, 6, 7, + 16, 17, 18, 19, 20, 21, 22, 23 }; + return renumber_registers(d, register_list, + sizeof(register_list) / sizeof(register_list[0])); +} + + +/* + * NMD::decode_gpr_gpr4_zero() - decoder for 'gpr4.zero' gpr encoding type + * + * Map a 4-bit code to the 5-bit register space according to this pattern: + * + * 1 0 + * 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | └---------------------┐ + * | | | | | | | | | | | └---------------┐ | + * | | | | | | | | | | └---------------┐ | | + * | | | | | | | | | └---------------┐ | | | + * | | | | | | | | └---------------┐ | | | | + * | | | | | | | | | | | | | | | | + * | | | | | | | | | | | | | | | | + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * 3 2 1 0 + * + * This pattern is the same one used for 'gpr4' gpr encoding type, except for + * the input value 3, that is mapped to the output value 0 instead of 11. + * + * Used in handling following instructions: + * + * - MOVE.BALC + * - MOVEP + * - SW[4X4] + */ +uint64 NMD::decode_gpr_gpr4_zero(uint64 d) +{ + static uint64 register_list[] = { 8, 9, 10, 0, 4, 5, 6, 7, + 16, 17, 18, 19, 20, 21, 22, 23 }; + return renumber_registers(d, register_list, + sizeof(register_list) / sizeof(register_list[0])); +} + + +/* * NMD::decode_gpr_gpr3() - decoder for 'gpr3' gpr encoding type * * Map a 3-bit code to the 5-bit register space according to this pattern: @@ -390,106 +461,6 @@ uint64 NMD::decode_gpr_gpr3_src_store(uint64 d) /* - * NMD::decode_gpr_gpr1() - decoder for 'gpr1' gpr encoding type - * - * Map a 1-bit code to the 5-bit register space according to this pattern: - * - * 1 0 - * | | - * | | - * | └---------------------┐ - * └---------------------┐ | - * | | - * | | - * | | - * | | - * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 - * 3 2 1 0 - * - * Used in handling following instruction: - * - * - MOVE.BALC - */ -uint64 NMD::decode_gpr_gpr1(uint64 d) -{ - static uint64 register_list[] = { 4, 5 }; - return renumber_registers(d, register_list, - sizeof(register_list) / sizeof(register_list[0])); -} - - -/* - * NMD::decode_gpr_gpr4_zero() - decoder for 'gpr4.zero' gpr encoding type - * - * Map a 4-bit code to the 5-bit register space according to this pattern: - * - * 1 0 - * 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 - * | | | | | | | | | | | | | | | | - * | | | | | | | | | | | | └---------------------┐ - * | | | | | | | | | | | └---------------┐ | - * | | | | | | | | | | └---------------┐ | | - * | | | | | | | | | └---------------┐ | | | - * | | | | | | | | └---------------┐ | | | | - * | | | | | | | | | | | | | | | | - * | | | | | | | | | | | | | | | | - * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 - * 3 2 1 0 - * - * This pattern is the same one used for 'gpr4' gpr encoding type, except for - * the input value 3, that is mapped to the output value 0 instead of 11. - * - * Used in handling following instructions: - * - * - MOVE.BALC - * - MOVEP - * - SW[4X4] - */ -uint64 NMD::decode_gpr_gpr4_zero(uint64 d) -{ - static uint64 register_list[] = { 8, 9, 10, 0, 4, 5, 6, 7, - 16, 17, 18, 19, 20, 21, 22, 23 }; - return renumber_registers(d, register_list, - sizeof(register_list) / sizeof(register_list[0])); -} - - -/* - * NMD::decode_gpr_gpr4() - decoder for 'gpr4' gpr encoding type - * - * Map a 4-bit code to the 5-bit register space according to this pattern: - * - * 1 0 - * 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 - * | | | | | | | | | | | | | | | | - * | | | | | | | | | | | | | | | | - * | | | | | | | | | | | └---------------┐ - * | | | | | | | | | | └---------------┐ | - * | | | | | | | | | └---------------┐ | | - * | | | | | | | | └---------------┐ | | | - * | | | | | | | | | | | | | | | | - * | | | | | | | | | | | | | | | | - * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 - * 3 2 1 0 - * - * Used in handling following instructions: - * - * - ADDU[4X4] - * - LW[4X4] - * - MOVEP[REV] - * - MUL[4X4] - * - SW[4X4] - */ -uint64 NMD::decode_gpr_gpr4(uint64 d) -{ - static uint64 register_list[] = { 8, 9, 10, 11, 4, 5, 6, 7, - 16, 17, 18, 19, 20, 21, 22, 23 }; - return renumber_registers(d, register_list, - sizeof(register_list) / sizeof(register_list[0])); -} - - -/* * NMD::decode_gpr_gpr2_reg1() - decoder for 'gpr2.reg1' gpr encoding type * * Map a 2-bit code to the 5-bit register space according to this pattern: @@ -549,6 +520,35 @@ uint64 NMD::decode_gpr_gpr2_reg2(uint64 d) } +/* + * NMD::decode_gpr_gpr1() - decoder for 'gpr1' gpr encoding type + * + * Map a 1-bit code to the 5-bit register space according to this pattern: + * + * 1 0 + * | | + * | | + * | └---------------------┐ + * └---------------------┐ | + * | | + * | | + * | | + * | | + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * 3 2 1 0 + * + * Used in handling following instruction: + * + * - MOVE.BALC + */ +uint64 NMD::decode_gpr_gpr1(uint64 d) +{ + static uint64 register_list[] = { 4, 5 }; + return renumber_registers(d, register_list, + sizeof(register_list) / sizeof(register_list[0])); +} + + uint64 NMD::copy(uint64 d) { return d; |