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| author | Richard Earnshaw <rearnsha@arm.com> | 2019-10-18 19:05:16 +0000 |
|---|---|---|
| committer | Richard Earnshaw <rearnsha@gcc.gnu.org> | 2019-10-18 19:05:16 +0000 |
| commit | a7c3ebae9348ccc3cc22fb51d6b98f8d7fbfcf88 (patch) | |
| tree | ba93587437a2fc3fbad7787cd93802a22b9ad827 | |
| parent | ead327735c15436cc0516f427da107be0d747822 (diff) | |
| download | gcc-a7c3ebae9348ccc3cc22fb51d6b98f8d7fbfcf88.zip gcc-a7c3ebae9348ccc3cc22fb51d6b98f8d7fbfcf88.tar.gz gcc-a7c3ebae9348ccc3cc22fb51d6b98f8d7fbfcf88.tar.bz2 | |
[arm] Improvements to negvsi4 and negvdi4.
The generic expansion code for negv does not try the subv patterns,
but instead emits a sub and a compare separately. Fortunately, the
patterns can make use of the new subv operations, so just call those.
We can also rewrite this using an iterator to simplify things further.
Finally, we can now make negvdi4 work on Thumb2 as well as Arm.
* config/arm/arm.md (negv<SIDI:mode>3): New expansion rule.
(negvsi3, negvdi3): Delete.
(negdi2_compare): Delete.
From-SVN: r277191
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/config/arm/arm.md | 41 |
2 files changed, 11 insertions, 36 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 3f2fbb7..6ef72d4 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,11 @@ 2019-10-18 Richard Earnshaw <rearnsha@arm.com> + * config/arm/arm.md (negv<SIDI:mode>3): New expansion rule. + (negvsi3, negvdi3): Delete. + (negdi2_compare): Delete. + +2019-10-18 Richard Earnshaw <rearnsha@arm.com> + * config/arm/arm.md (subvdi4): Decompose calculation into 32-bit operations. (subdi3_compare1): Delete pattern. diff --git a/gcc/config/arm/arm.md b/gcc/config/arm/arm.md index 5a8175f..7ef0c16 100644 --- a/gcc/config/arm/arm.md +++ b/gcc/config/arm/arm.md @@ -4581,48 +4581,17 @@ ;; Unary arithmetic insns -(define_expand "negvsi3" - [(match_operand:SI 0 "register_operand") - (match_operand:SI 1 "register_operand") +(define_expand "negv<SIDI:mode>3" + [(match_operand:SIDI 0 "s_register_operand") + (match_operand:SIDI 1 "s_register_operand") (match_operand 2 "")] "TARGET_32BIT" { - emit_insn (gen_subsi3_compare (operands[0], const0_rtx, operands[1])); - arm_gen_unlikely_cbranch (NE, CC_Vmode, operands[2]); - - DONE; -}) - -(define_expand "negvdi3" - [(match_operand:DI 0 "s_register_operand") - (match_operand:DI 1 "s_register_operand") - (match_operand 2 "")] - "TARGET_ARM" -{ - emit_insn (gen_negdi2_compare (operands[0], operands[1])); - arm_gen_unlikely_cbranch (NE, CC_Vmode, operands[2]); - + emit_insn (gen_subv<mode>4 (operands[0], const0_rtx, operands[1], + operands[2])); DONE; }) - -(define_insn "negdi2_compare" - [(set (reg:CC CC_REGNUM) - (compare:CC - (const_int 0) - (match_operand:DI 1 "register_operand" "r,r"))) - (set (match_operand:DI 0 "register_operand" "=&r,&r") - (minus:DI (const_int 0) (match_dup 1)))] - "TARGET_ARM" - "@ - rsbs\\t%Q0, %Q1, #0;rscs\\t%R0, %R1, #0 - rsbs\\t%Q0, %Q1, #0;sbcs\\t%R0, %R1, %R1, lsl #1" - [(set_attr "conds" "set") - (set_attr "arch" "a,t2") - (set_attr "length" "8") - (set_attr "type" "multiple")] -) - (define_expand "negsi2" [(set (match_operand:SI 0 "s_register_operand") (neg:SI (match_operand:SI 1 "s_register_operand")))] |