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| author | Richard Henderson <rth@twiddle.net> | 2013-03-11 22:11:30 -0700 |
|---|---|---|
| committer | Aurelien Jarno <aurelien@aurel32.net> | 2013-04-27 02:16:44 +0200 |
| commit | 0637c56c99be1c73f5814c7f02c0735242b757e5 (patch) | |
| tree | 50ba4624c503f32694e9ad0b949fc465e4556339 /tcg/arm | |
| parent | b6b24cb031d1d6e6f50abf0c8bdc1c309e549156 (diff) | |
| download | qemu-0637c56c99be1c73f5814c7f02c0735242b757e5.tar.gz qemu-0637c56c99be1c73f5814c7f02c0735242b757e5.tar.bz2 qemu-0637c56c99be1c73f5814c7f02c0735242b757e5.zip | |
tcg-arm: Implement division instructions
An armv7 extension implements division, present on Cortex A15.
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg/arm')
| -rw-r--r-- | tcg/arm/tcg-target.c | 36 | ||||
| -rw-r--r-- | tcg/arm/tcg-target.h | 7 |
2 files changed, 42 insertions, 1 deletions
diff --git a/tcg/arm/tcg-target.c b/tcg/arm/tcg-target.c index 09f11e19e8..b0e73d2c6e 100644 --- a/tcg/arm/tcg-target.c +++ b/tcg/arm/tcg-target.c @@ -597,6 +597,16 @@ static inline void tcg_out_smull32(TCGContext *s, } } +static inline void tcg_out_sdiv(TCGContext *s, int cond, int rd, int rn, int rm) +{ + tcg_out32(s, 0x0710f010 | (cond << 28) | (rd << 16) | rn | (rm << 8)); +} + +static inline void tcg_out_udiv(TCGContext *s, int cond, int rd, int rn, int rm) +{ + tcg_out32(s, 0x0730f010 | (cond << 28) | (rd << 16) | rn | (rm << 8)); +} + static inline void tcg_out_ext8s(TCGContext *s, int cond, int rd, int rn) { @@ -1868,6 +1878,25 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc, args[3], args[4], const_args[2]); break; + case INDEX_op_div_i32: + tcg_out_sdiv(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_divu_i32: + tcg_out_udiv(s, COND_AL, args[0], args[1], args[2]); + break; + case INDEX_op_rem_i32: + tcg_out_sdiv(s, COND_AL, TCG_REG_R8, args[1], args[2]); + tcg_out_mul32(s, COND_AL, TCG_REG_R8, TCG_REG_R8, args[2]); + tcg_out_dat_reg(s, COND_AL, ARITH_SUB, args[0], args[1], TCG_REG_R8, + SHIFT_IMM_LSL(0)); + break; + case INDEX_op_remu_i32: + tcg_out_udiv(s, COND_AL, TCG_REG_R8, args[1], args[2]); + tcg_out_mul32(s, COND_AL, TCG_REG_R8, TCG_REG_R8, args[2]); + tcg_out_dat_reg(s, COND_AL, ARITH_SUB, args[0], args[1], TCG_REG_R8, + SHIFT_IMM_LSL(0)); + break; + default: tcg_abort(); } @@ -1954,6 +1983,13 @@ static const TCGTargetOpDef arm_op_defs[] = { { INDEX_op_deposit_i32, { "r", "0", "rZ" } }, +#if TCG_TARGET_HAS_div_i32 + { INDEX_op_div_i32, { "r", "r", "r" } }, + { INDEX_op_rem_i32, { "r", "r", "r" } }, + { INDEX_op_divu_i32, { "r", "r", "r" } }, + { INDEX_op_remu_i32, { "r", "r", "r" } }, +#endif + { -1 }, }; diff --git a/tcg/arm/tcg-target.h b/tcg/arm/tcg-target.h index 209f585f39..3be41cce3c 100644 --- a/tcg/arm/tcg-target.h +++ b/tcg/arm/tcg-target.h @@ -56,7 +56,6 @@ typedef enum { #define TCG_TARGET_CALL_STACK_OFFSET 0 /* optional instructions */ -#define TCG_TARGET_HAS_div_i32 0 #define TCG_TARGET_HAS_ext8s_i32 1 #define TCG_TARGET_HAS_ext16s_i32 1 #define TCG_TARGET_HAS_ext8u_i32 0 /* and r0, r1, #0xff */ @@ -75,6 +74,12 @@ typedef enum { #define TCG_TARGET_HAS_movcond_i32 1 #define TCG_TARGET_HAS_muls2_i32 1 +#ifdef __ARM_ARCH_EXT_IDIV__ +#define TCG_TARGET_HAS_div_i32 1 +#else +#define TCG_TARGET_HAS_div_i32 0 +#endif + extern bool tcg_target_deposit_valid(int ofs, int len); #define TCG_TARGET_deposit_i32_valid tcg_target_deposit_valid |