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| author | Richard Henderson <richard.henderson@linaro.org> | 2019-04-17 13:51:29 -1000 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2019-05-13 22:52:08 +0000 |
| commit | ff1f11f7f8710a768f9313f24bd7f509d3db27e5 (patch) | |
| tree | d3f5e624317ff77f78e7812040d09a4ab0da0b10 /tcg | |
| parent | 0a8d7a3bf5a149a82450eef555fd61728703dd84 (diff) | |
| download | qemu-ff1f11f7f8710a768f9313f24bd7f509d3db27e5.zip | |
tcg: Add support for integer absolute value
Remove a function of the same name from target/arm/.
Use a branchless implementation of abs gleaned from gcc.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'tcg')
| -rw-r--r-- | tcg/tcg-op.c | 20 | ||||
| -rw-r--r-- | tcg/tcg-op.h | 5 |
2 files changed, 25 insertions, 0 deletions
diff --git a/tcg/tcg-op.c b/tcg/tcg-op.c index a00d1df37e..0ac291f1c4 100644 --- a/tcg/tcg-op.c +++ b/tcg/tcg-op.c @@ -1091,6 +1091,16 @@ void tcg_gen_umax_i32(TCGv_i32 ret, TCGv_i32 a, TCGv_i32 b) tcg_gen_movcond_i32(TCG_COND_LTU, ret, a, b, b, a); } +void tcg_gen_abs_i32(TCGv_i32 ret, TCGv_i32 a) +{ + TCGv_i32 t = tcg_temp_new_i32(); + + tcg_gen_sari_i32(t, a, 31); + tcg_gen_xor_i32(ret, a, t); + tcg_gen_sub_i32(ret, ret, t); + tcg_temp_free_i32(t); +} + /* 64-bit ops */ #if TCG_TARGET_REG_BITS == 32 @@ -2548,6 +2558,16 @@ void tcg_gen_umax_i64(TCGv_i64 ret, TCGv_i64 a, TCGv_i64 b) tcg_gen_movcond_i64(TCG_COND_LTU, ret, a, b, b, a); } +void tcg_gen_abs_i64(TCGv_i64 ret, TCGv_i64 a) +{ + TCGv_i64 t = tcg_temp_new_i64(); + + tcg_gen_sari_i64(t, a, 63); + tcg_gen_xor_i64(ret, a, t); + tcg_gen_sub_i64(ret, ret, t); + tcg_temp_free_i64(t); +} + /* Size changing operations. */ void tcg_gen_extrl_i64_i32(TCGv_i32 ret, TCGv_i64 arg) diff --git a/tcg/tcg-op.h b/tcg/tcg-op.h index 472b73cb38..660fe205d0 100644 --- a/tcg/tcg-op.h +++ b/tcg/tcg-op.h @@ -335,6 +335,7 @@ void tcg_gen_smin_i32(TCGv_i32, TCGv_i32 arg1, TCGv_i32 arg2); void tcg_gen_smax_i32(TCGv_i32, TCGv_i32 arg1, TCGv_i32 arg2); void tcg_gen_umin_i32(TCGv_i32, TCGv_i32 arg1, TCGv_i32 arg2); void tcg_gen_umax_i32(TCGv_i32, TCGv_i32 arg1, TCGv_i32 arg2); +void tcg_gen_abs_i32(TCGv_i32, TCGv_i32); static inline void tcg_gen_discard_i32(TCGv_i32 arg) { @@ -534,6 +535,7 @@ void tcg_gen_smin_i64(TCGv_i64, TCGv_i64 arg1, TCGv_i64 arg2); void tcg_gen_smax_i64(TCGv_i64, TCGv_i64 arg1, TCGv_i64 arg2); void tcg_gen_umin_i64(TCGv_i64, TCGv_i64 arg1, TCGv_i64 arg2); void tcg_gen_umax_i64(TCGv_i64, TCGv_i64 arg1, TCGv_i64 arg2); +void tcg_gen_abs_i64(TCGv_i64, TCGv_i64); #if TCG_TARGET_REG_BITS == 64 static inline void tcg_gen_discard_i64(TCGv_i64 arg) @@ -973,6 +975,7 @@ void tcg_gen_nor_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b); void tcg_gen_eqv_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b); void tcg_gen_not_vec(unsigned vece, TCGv_vec r, TCGv_vec a); void tcg_gen_neg_vec(unsigned vece, TCGv_vec r, TCGv_vec a); +void tcg_gen_abs_vec(unsigned vece, TCGv_vec r, TCGv_vec a); void tcg_gen_ssadd_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b); void tcg_gen_usadd_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b); void tcg_gen_sssub_vec(unsigned vece, TCGv_vec r, TCGv_vec a, TCGv_vec b); @@ -1019,6 +1022,7 @@ void tcg_gen_stl_vec(TCGv_vec r, TCGv_ptr base, TCGArg offset, TCGType t); #define tcg_gen_addi_tl tcg_gen_addi_i64 #define tcg_gen_sub_tl tcg_gen_sub_i64 #define tcg_gen_neg_tl tcg_gen_neg_i64 +#define tcg_gen_abs_tl tcg_gen_abs_i64 #define tcg_gen_subfi_tl tcg_gen_subfi_i64 #define tcg_gen_subi_tl tcg_gen_subi_i64 #define tcg_gen_and_tl tcg_gen_and_i64 @@ -1131,6 +1135,7 @@ void tcg_gen_stl_vec(TCGv_vec r, TCGv_ptr base, TCGArg offset, TCGType t); #define tcg_gen_addi_tl tcg_gen_addi_i32 #define tcg_gen_sub_tl tcg_gen_sub_i32 #define tcg_gen_neg_tl tcg_gen_neg_i32 +#define tcg_gen_abs_tl tcg_gen_abs_i32 #define tcg_gen_subfi_tl tcg_gen_subfi_i32 #define tcg_gen_subi_tl tcg_gen_subi_i32 #define tcg_gen_and_tl tcg_gen_and_i32 |