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gcc/0155-Add-maxmin-and-uzp1-uzp2-combining.patch
Xiong Zhou 1003614af1 [Sync] Sync patches from openeuler/gcc
2023-12-12 12:08:42 +08:00

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From 1e886b98ff7ffdac023dcee8645717f2849d2eb7 Mon Sep 17 00:00:00 2001
From: Diachkov Ilia WX1215920 <diachkov.ilia1@huawei-partners.com>
Date: Wed, 25 Oct 2023 18:12:28 +0300
Subject: [PATCH 1/6] Add maxmin and uzp1/uzp2 combining
---
gcc/config/aarch64/aarch64-simd.md | 339 +++++++++++++++++++++++++-
gcc/config/aarch64/predicates.md | 19 ++
gcc/testsuite/gcc.dg/combine-maxmin.c | 46 ++++
3 files changed, 399 insertions(+), 5 deletions(-)
create mode 100755 gcc/testsuite/gcc.dg/combine-maxmin.c
diff --git a/gcc/config/aarch64/aarch64-simd.md b/gcc/config/aarch64/aarch64-simd.md
index 6049adc3f..7f707de57 100644
--- a/gcc/config/aarch64/aarch64-simd.md
+++ b/gcc/config/aarch64/aarch64-simd.md
@@ -1034,6 +1034,82 @@
[(set_attr "type" "neon_shift_imm<q>")]
)
+;; Simplify the extension with following truncation for shift+neg operation.
+
+(define_insn_and_split "*aarch64_sshr_neg_v8hi"
+ [(set (match_operand:V8HI 0 "register_operand" "=w")
+ (vec_concat:V8HI
+ (truncate:V4HI
+ (ashiftrt:V4SI
+ (neg:V4SI
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (match_operand:V8HI 1 "register_operand")
+ (match_operand:V8HI 3 "vect_par_cnst_lo_half"))))
+ (match_operand:V4SI 2 "maxmin_arith_shift_operand")))
+ (truncate:V4HI
+ (ashiftrt:V4SI
+ (neg:V4SI
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (match_dup 1)
+ (match_operand:V8HI 4 "vect_par_cnst_hi_half"))))
+ (match_dup 2)))))]
+ "TARGET_SIMD"
+ "#"
+ "&& true"
+ [(set (match_operand:V8HI 0 "register_operand" "=w")
+ (ashiftrt:V8HI
+ (neg:V8HI
+ (match_operand:V8HI 1 "register_operand" "w"))
+ (match_operand:V8HI 2 "aarch64_simd_imm_minus_one")))]
+ {
+ /* Reduce the shift amount to smaller mode. */
+ int val = INTVAL (CONST_VECTOR_ENCODED_ELT (operands[2], 0))
+ - (GET_MODE_UNIT_BITSIZE (GET_MODE (operands[2])) / 2);
+ operands[2] = aarch64_simd_gen_const_vector_dup (V8HImode, val);
+ }
+ [(set_attr "type" "multiple")]
+)
+
+;; The helper definition that allows combiner to use the previous pattern.
+
+(define_insn_and_split "*aarch64_sshr_neg_tmpv8hi"
+ [(set (match_operand:V8HI 0 "register_operand" "=w")
+ (vec_concat:V8HI
+ (truncate:V4HI
+ (ashiftrt:V4SI
+ (neg:V4SI
+ (match_operand:V4SI 1 "register_operand" "w"))
+ (match_operand:V4SI 2 "maxmin_arith_shift_operand")))
+ (truncate:V4HI
+ (ashiftrt:V4SI
+ (neg:V4SI
+ (match_operand:V4SI 3 "register_operand" "w"))
+ (match_dup 2)))))]
+ "TARGET_SIMD"
+ "#"
+ "&& true"
+ [(set (match_operand:V4SI 1 "register_operand" "=w")
+ (ashiftrt:V4SI
+ (neg:V4SI
+ (match_dup 1))
+ (match_operand:V4SI 2 "maxmin_arith_shift_operand")))
+ (set (match_operand:V4SI 3 "register_operand" "=w")
+ (ashiftrt:V4SI
+ (neg:V4SI
+ (match_dup 3))
+ (match_dup 2)))
+ (set (match_operand:V8HI 0 "register_operand" "=w")
+ (vec_concat:V8HI
+ (truncate:V4HI
+ (match_dup 1))
+ (truncate:V4HI
+ (match_dup 3))))]
+ ""
+ [(set_attr "type" "multiple")]
+)
+
(define_insn "*aarch64_simd_sra<mode>"
[(set (match_operand:VDQ_I 0 "register_operand" "=w")
(plus:VDQ_I
@@ -1459,6 +1535,78 @@
[(set_attr "type" "neon_minmax<q>")]
)
+;; Use sequential smax+smin to replace vector arithmetic operations like this:
+;; a = ((x & ~((1 << 8)-1)) ? (-x)>>31 & ((1 << 8)-1) : x);
+;; TODO: maybe extend to scalar operations.
+
+(define_insn_and_split "*aarch64_maxmin_arith<mode>"
+ [(set (match_operand:VDQHSD 0 "register_operand" "=w")
+ (xor:VDQHSD
+ (and:VDQHSD
+ (xor:VDQHSD
+ (ashiftrt:VDQHSD
+ (neg:VDQHSD
+ (match_operand:VDQHSD 1 "register_operand"))
+ (match_operand:VDQHSD 2 "maxmin_arith_shift_operand"))
+ (match_dup 1))
+ (neg:VDQHSD
+ (eq:VDQHSD
+ (and:VDQHSD
+ (match_dup 1)
+ (match_operand:VDQHSD 3 "aarch64_bic_imm_for_maxmin"))
+ (match_operand:VDQHSD 4 "aarch64_simd_or_scalar_imm_zero"))))
+ (ashiftrt:VDQHSD
+ (neg:VDQHSD
+ (match_dup 1))
+ (match_dup 2))))]
+ "TARGET_SIMD && !reload_completed"
+ "#"
+ "&& true"
+ [(set (match_operand:VDQHSD 5 "register_operand" "w") (match_dup 3))
+ (set (match_operand:VDQHSD 6 "register_operand" "w") (match_dup 4))
+ (set (match_operand:VDQHSD 0 "register_operand" "=w")
+ (smax:VDQHSD (match_operand:VDQHSD 1 "register_operand" "w")
+ (match_operand:VDQHSD 6 "register_operand" "w")))
+ (set (match_operand:VDQHSD 0 "register_operand" "=w")
+ (smin:VDQHSD (match_operand:VDQHSD 0 "register_operand" "w")
+ (match_operand:VDQHSD 5 "register_operand" "w")))]
+ {
+ if (can_create_pseudo_p ())
+ {
+ int val = INTVAL (CONST_VECTOR_ENCODED_ELT (operands[3], 0));
+ operands[3] = aarch64_simd_gen_const_vector_dup (<MODE>mode,
+ ~val);
+ operands[5] = gen_reg_rtx (<MODE>mode);
+ operands[6] = gen_reg_rtx (<MODE>mode);
+ }
+ else
+ FAIL;
+ }
+ [(set_attr "type" "neon_minmax<q>")]
+)
+
+;; The helper definition that allows combiner to use the previous pattern.
+
+(define_insn_and_split "*aarch64_maxmin_tmp<mode>"
+ [(set (match_operand:VDQHSD 0 "register_operand" "=w")
+ (ashiftrt:VDQHSD
+ (neg:VDQHSD
+ (match_operand:VDQHSD 1 "register_operand" "w"))
+ (match_operand:VDQHSD 2 "maxmin_arith_shift_operand")))]
+ "TARGET_SIMD"
+ "#"
+ "&& reload_completed"
+ [(set (match_operand:VDQHSD 0 "register_operand")
+ (neg:VDQHSD
+ (match_operand:VDQHSD 1 "register_operand" "w")))
+ (set (match_dup 0)
+ (ashiftrt:VDQHSD
+ (match_dup 0)
+ (match_operand:VDQHSD 2 "maxmin_arith_shift_operand")))]
+ ""
+ [(set_attr "type" "neon_minmax<q>")]
+)
+
;; Pairwise FP Max/Min operations.
(define_insn "aarch64_<maxmin_uns>p<mode>"
[(set (match_operand:VHSDF 0 "register_operand" "=w")
@@ -1599,7 +1747,8 @@
DONE;
})
-;; For quads.
+;; For quads. Use UZP1 on the narrower type, which discards the high part of
+;; each wide element.
(define_insn "vec_pack_trunc_<mode>"
[(set (match_operand:<VNARROWQ2> 0 "register_operand" "=&w")
@@ -1609,12 +1758,32 @@
"TARGET_SIMD"
{
if (BYTES_BIG_ENDIAN)
- return "xtn\\t%0.<Vntype>, %2.<Vtype>\;xtn2\\t%0.<V2ntype>, %1.<Vtype>";
+ return "uzp1\\t%0.<V2ntype>, %2.<V2ntype>, %1.<V2ntype>";
else
- return "xtn\\t%0.<Vntype>, %1.<Vtype>\;xtn2\\t%0.<V2ntype>, %2.<Vtype>";
+ return "uzp1\\t%0.<V2ntype>, %1.<V2ntype>, %2.<V2ntype>";
}
- [(set_attr "type" "multiple")
- (set_attr "length" "8")]
+ [(set_attr "type" "neon_permute<q>")
+ (set_attr "length" "4")]
+)
+
+(define_insn "vec_pack_trunc_shifted_<mode>"
+ [(set (match_operand:<VNARROWQ2> 0 "register_operand" "=&w")
+ (vec_concat:<VNARROWQ2>
+ (truncate:<VNARROWQ>
+ (ashiftrt:VQN (match_operand:VQN 1 "register_operand" "w")
+ (match_operand:VQN 2 "half_size_operand" "w")))
+ (truncate:<VNARROWQ>
+ (ashiftrt:VQN (match_operand:VQN 3 "register_operand" "w")
+ (match_operand:VQN 4 "half_size_operand" "w")))))]
+ "TARGET_SIMD"
+ {
+ if (BYTES_BIG_ENDIAN)
+ return "uzp2\\t%0.<V2ntype>, %3.<V2ntype>, %1.<V2ntype>";
+ else
+ return "uzp2\\t%0.<V2ntype>, %1.<V2ntype>, %3.<V2ntype>";
+ }
+ [(set_attr "type" "neon_permute<q>")
+ (set_attr "length" "4")]
)
;; Widening operations.
@@ -4852,6 +5021,166 @@
[(set_attr "type" "neon_tst<q>")]
)
+;; Simplify the extension with following truncation for cmtst-like operation.
+
+(define_insn_and_split "*aarch64_cmtst_arith_v8hi"
+ [(set (match_operand:V8HI 0 "register_operand" "=w")
+ (vec_concat:V8HI
+ (plus:V4HI
+ (truncate:V4HI
+ (eq:V4SI
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (and:V8HI
+ (match_operand:V8HI 1 "register_operand")
+ (match_operand:V8HI 2 "aarch64_bic_imm_for_maxmin"))
+ (match_operand:V8HI 3 "vect_par_cnst_lo_half")))
+ (match_operand:V4SI 4 "aarch64_simd_or_scalar_imm_zero")))
+ (match_operand:V4HI 5 "aarch64_simd_imm_minus_one"))
+ (plus:V4HI
+ (truncate:V4HI
+ (eq:V4SI
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (and:V8HI
+ (match_dup 1)
+ (match_dup 2))
+ (match_operand:V8HI 6 "vect_par_cnst_hi_half")))
+ (match_dup 4)))
+ (match_dup 5))))]
+ "TARGET_SIMD && !reload_completed"
+ "#"
+ "&& true"
+ [(set (match_operand:V8HI 6 "register_operand" "=w")
+ (match_operand:V8HI 2 "aarch64_bic_imm_for_maxmin"))
+ (set (match_operand:V8HI 0 "register_operand" "=w")
+ (plus:V8HI
+ (eq:V8HI
+ (and:V8HI
+ (match_operand:V8HI 1 "register_operand" "w")
+ (match_dup 6))
+ (match_operand:V8HI 4 "aarch64_simd_imm_zero"))
+ (match_operand:V8HI 5 "aarch64_simd_imm_minus_one")))]
+ {
+ if (can_create_pseudo_p ())
+ {
+ int val = INTVAL (CONST_VECTOR_ENCODED_ELT (operands[4], 0));
+ operands[4] = aarch64_simd_gen_const_vector_dup (V8HImode, val);
+ int val2 = INTVAL (CONST_VECTOR_ENCODED_ELT (operands[5], 0));
+ operands[5] = aarch64_simd_gen_const_vector_dup (V8HImode, val2);
+
+ operands[6] = gen_reg_rtx (V8HImode);
+ }
+ else
+ FAIL;
+ }
+ [(set_attr "type" "neon_tst_q")]
+)
+
+;; Three helper definitions that allow combiner to use the previous pattern.
+
+(define_insn_and_split "*aarch64_cmtst_arith_tmp_lo_v8hi"
+ [(set (match_operand:V4SI 0 "register_operand" "=w")
+ (neg:V4SI
+ (eq:V4SI
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (and:V8HI
+ (match_operand:V8HI 1 "register_operand")
+ (match_operand:V8HI 2 "aarch64_bic_imm_for_maxmin"))
+ (match_operand:V8HI 3 "vect_par_cnst_lo_half")))
+ (match_operand:V4SI 4 "aarch64_simd_or_scalar_imm_zero"))))]
+ "TARGET_SIMD && !reload_completed"
+ "#"
+ "&& true"
+ [(set (match_operand:V8HI 5 "register_operand" "=w")
+ (and:V8HI
+ (match_operand:V8HI 1 "register_operand")
+ (match_operand:V8HI 2 "aarch64_bic_imm_for_maxmin")))
+ (set (match_operand:V4SI 0 "register_operand" "=w")
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (match_dup 5)
+ (match_operand:V8HI 3 "vect_par_cnst_lo_half"))))
+ (set (match_dup 0)
+ (neg:V4SI
+ (eq:V4SI
+ (match_dup 0)
+ (match_operand:V4SI 4 "aarch64_simd_or_scalar_imm_zero"))))]
+ {
+ if (can_create_pseudo_p ())
+ operands[5] = gen_reg_rtx (V8HImode);
+ else
+ FAIL;
+ }
+ [(set_attr "type" "multiple")]
+)
+
+(define_insn_and_split "*aarch64_cmtst_arith_tmp_hi_v8hi"
+ [(set (match_operand:V4SI 0 "register_operand" "=w")
+ (neg:V4SI
+ (eq:V4SI
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (and:V8HI
+ (match_operand:V8HI 1 "register_operand")
+ (match_operand:V8HI 2 "aarch64_bic_imm_for_maxmin"))
+ (match_operand:V8HI 3 "vect_par_cnst_hi_half")))
+ (match_operand:V4SI 4 "aarch64_simd_or_scalar_imm_zero"))))]
+ "TARGET_SIMD && !reload_completed"
+ "#"
+ "&& true"
+ [(set (match_operand:V8HI 5 "register_operand" "=w")
+ (and:V8HI
+ (match_operand:V8HI 1 "register_operand")
+ (match_operand:V8HI 2 "aarch64_bic_imm_for_maxmin")))
+ (set (match_operand:V4SI 0 "register_operand" "=w")
+ (sign_extend:V4SI
+ (vec_select:V4HI
+ (match_dup 5)
+ (match_operand:V8HI 3 "vect_par_cnst_hi_half"))))
+ (set (match_dup 0)
+ (neg:V4SI
+ (eq:V4SI
+ (match_dup 0)
+ (match_operand:V4SI 4 "aarch64_simd_or_scalar_imm_zero"))))]
+ {
+ if (can_create_pseudo_p ())
+ operands[5] = gen_reg_rtx (V8HImode);
+ else
+ FAIL;
+ }
+ [(set_attr "type" "multiple")]
+)
+
+(define_insn_and_split "*aarch64_cmtst_arith_tmpv8hi"
+ [(set (match_operand:V8HI 0 "register_operand" "=w")
+ (vec_concat:V8HI
+ (truncate:V4HI
+ (not:V4SI
+ (match_operand:V4SI 1 "register_operand" "w")))
+ (truncate:V4HI
+ (not:V4SI
+ (match_operand:V4SI 2 "register_operand" "w")))))]
+ "TARGET_SIMD"
+ "#"
+ "&& true"
+ [(set (match_operand:V4SI 1 "register_operand" "=w")
+ (not:V4SI
+ (match_dup 1)))
+ (set (match_operand:V4SI 2 "register_operand" "=w")
+ (not:V4SI
+ (match_dup 2)))
+ (set (match_operand:V8HI 0 "register_operand" "=w")
+ (vec_concat:V8HI
+ (truncate:V4HI
+ (match_dup 1))
+ (truncate:V4HI
+ (match_dup 2))))]
+ ""
+ [(set_attr "type" "multiple")]
+)
+
(define_insn_and_split "aarch64_cmtstdi"
[(set (match_operand:DI 0 "register_operand" "=w,r")
(neg:DI
diff --git a/gcc/config/aarch64/predicates.md b/gcc/config/aarch64/predicates.md
index 1754b1eff..3cd83334b 100644
--- a/gcc/config/aarch64/predicates.md
+++ b/gcc/config/aarch64/predicates.md
@@ -91,6 +91,25 @@
(match_test "aarch64_simd_valid_immediate (op, NULL,
AARCH64_CHECK_ORR)"))))
+(define_predicate "aarch64_bic_imm_for_maxmin"
+ (match_code "const_vector")
+{
+ if (!aarch64_simd_valid_immediate (op, NULL, AARCH64_CHECK_BIC))
+ return false;
+ op = unwrap_const_vec_duplicate (op);
+ unsigned int size = GET_MODE_UNIT_BITSIZE (mode);
+ return CONST_INT_P (op)
+ && ((~UINTVAL (op)) < (((long unsigned int) 1 << size) - 1));
+})
+
+(define_predicate "maxmin_arith_shift_operand"
+ (match_code "const_vector")
+{
+ op = unwrap_const_vec_duplicate (op);
+ unsigned int size = GET_MODE_UNIT_BITSIZE (mode) - 1;
+ return CONST_INT_P (op) && (UINTVAL (op) == size);
+})
+
(define_predicate "aarch64_reg_or_bic_imm"
(ior (match_operand 0 "register_operand")
(and (match_code "const_vector")
diff --git a/gcc/testsuite/gcc.dg/combine-maxmin.c b/gcc/testsuite/gcc.dg/combine-maxmin.c
new file mode 100755
index 000000000..06bce7029
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/combine-maxmin.c
@@ -0,0 +1,46 @@
+/* { dg-do compile { target aarch64-*-* } } */
+/* { dg-options "-O3 -fdump-rtl-combine-all" } */
+
+/* The test checks usage of smax/smin insns for clip evaluation and
+ * uzp1/uzp2 insns for vector element narrowing. It's inspired by
+ * sources of x264 codec. */
+
+typedef unsigned char uint8_t;
+typedef long int intptr_t;
+typedef signed short int int16_t;
+
+static __attribute__((always_inline)) inline uint8_t clip (int x )
+{
+ return ( (x & ~((1 << 8)-1)) ? (-x)>>31 & ((1 << 8)-1) : x );
+}
+
+void hf (uint8_t *dsth, uint8_t *dstv, uint8_t *dstc, uint8_t *src,
+ intptr_t stride, int width, int height, int16_t *buf)
+{
+ const int pad = (8 > 9) ? (-10 * ((1 << 8)-1)) : 0;
+ for( int y = 0; y < height; y++ ) {
+ for( int x = -2; x < width+3; x++ ) {
+ int v = ((src)[x-2*stride] + (src)[x+3*stride] - 5*((src)[x-stride]
+ + (src)[x+2*stride]) + 20*((src)[x] + (src)[x+stride]));
+ dstv[x] = clip ( (v + 16) >> 5 );
+ buf[x+2] = v + pad;
+ }
+ for( int x = 0; x < width; x++ )
+ dstc[x] = clip ((((buf+2)[x-2*1] + (buf+2)[x+3*1] - 5*((buf+2)[x-1]
+ + (buf+2)[x+2*1]) + 20*((buf+2)[x] + (buf+2)[x+1]))
+ - 32*pad + 512) >> 10);
+ for( int x = 0; x < width; x++ )
+ dsth[x] = clip ((((src)[x-2*1] + (src)[x+3*1] - 5*((src)[x-1]
+ + (src)[x+2*1]) + 20*((src)[x] + (src)[x+1]))
+ + 16) >> 5);
+ dsth += stride;
+ dstv += stride;
+ dstc += stride;
+ src += stride;
+ }
+}
+
+/* { dg-final { scan-assembler-times {smax\t} 4 } } */
+/* { dg-final { scan-assembler-times {smin\t} 4 } } */
+/* { dg-final { scan-assembler-times {cmtst\t} 2 } } */
+/* { dg-final { scan-assembler-times {uzp1\t} 6 } } */
--
2.33.0
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