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internal/bytealg: add regABI support in bytealg functions on loong64
Update #40724 Co-authored-by: Xiaolin Zhao <zhaoxiaolin@loongson.cn> Change-Id: I4a7392afd7238d44e7d09aaca7e0d733649926ac Reviewed-on: https://go-review.googlesource.com/c/go/+/521785 TryBot-Result: Gopher Robot <gobot@golang.org> Reviewed-by: Cherry Mui <cherryyz@google.com> Run-TryBot: David Chase <drchase@google.com> Reviewed-by: Meidan Li <limeidan@loongson.cn> Reviewed-by: David Chase <drchase@google.com> Auto-Submit: David Chase <drchase@google.com>
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Guoqi Chen
Gopher Robot
parent
4e6bbbe61f
commit
1052d09dd7
@ -5,83 +5,102 @@
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#include "go_asm.h"
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#include "textflag.h"
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TEXT ·Compare(SB),NOSPLIT,$0-56
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MOVV a_base+0(FP), R6
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MOVV b_base+24(FP), R7
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MOVV a_len+8(FP), R4
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MOVV b_len+32(FP), R5
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TEXT ·Compare<ABIInternal>(SB),NOSPLIT,$0-56
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#ifndef GOEXPERIMENT_regabiargs
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MOVV a_base+0(FP), R4
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MOVV a_len+8(FP), R5
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MOVV b_base+24(FP), R6
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MOVV b_len+32(FP), R7
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MOVV $ret+48(FP), R13
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#else
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// R4 = a_base
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// R5 = a_len
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// R6 = a_cap (unused)
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// R7 = b_base (want in R6)
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// R8 = b_len (want in R7)
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// R9 = b_cap (unused)
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MOVV R7, R6
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MOVV R8, R7
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#endif
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JMP cmpbody<>(SB)
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TEXT runtime·cmpstring(SB),NOSPLIT,$0-40
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MOVV a_base+0(FP), R6
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MOVV b_base+16(FP), R7
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MOVV a_len+8(FP), R4
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MOVV b_len+24(FP), R5
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TEXT runtime·cmpstring<ABIInternal>(SB),NOSPLIT,$0-40
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#ifndef GOEXPERIMENT_regabiargs
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MOVV a_base+0(FP), R4
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MOVV b_base+16(FP), R6
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MOVV a_len+8(FP), R5
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MOVV b_len+24(FP), R7
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MOVV $ret+32(FP), R13
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#endif
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// R4 = a_base
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// R5 = a_len
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// R6 = b_base
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// R7 = b_len
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JMP cmpbody<>(SB)
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// On entry:
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// R4 length of a
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// R5 length of b
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// R6 points to the start of a
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// R7 points to the start of b
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// R5 length of a
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// R7 length of b
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// R4 points to the start of a
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// R6 points to the start of b
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// R13 points to the return value (-1/0/1)
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TEXT cmpbody<>(SB),NOSPLIT|NOFRAME,$0
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BEQ R6, R7, samebytes // same start of a and b
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BEQ R4, R6, samebytes // same start of a and b
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SGTU R4, R5, R9
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SGTU R5, R7, R9
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BNE R0, R9, r2_lt_r1
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MOVV R4, R14
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MOVV R5, R14
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JMP entry
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r2_lt_r1:
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MOVV R5, R14 // R14 is min(R4, R5)
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MOVV R7, R14 // R14 is min(R4, R5)
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entry:
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ADDV R6, R14, R12 // R6 start of a, R14 end of a
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BEQ R6, R12, samebytes // length is 0
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ADDV R4, R14, R12 // R6 start of a, R14 end of a
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BEQ R4, R12, samebytes // length is 0
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SRLV $4, R14 // R14 is number of chunks
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BEQ R0, R14, byte_loop
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// make sure both a and b are aligned.
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OR R6, R7, R15
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OR R4, R6, R15
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AND $7, R15
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BNE R0, R15, byte_loop
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PCALIGN $16
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chunk16_loop:
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BEQ R0, R14, byte_loop
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MOVV (R6), R8
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MOVV (R7), R9
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MOVV (R4), R8
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MOVV (R6), R9
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BNE R8, R9, byte_loop
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MOVV 8(R6), R16
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MOVV 8(R7), R17
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MOVV 8(R4), R16
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MOVV 8(R6), R17
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ADDV $16, R4
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ADDV $16, R6
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ADDV $16, R7
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SUBVU $1, R14
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BEQ R16, R17, chunk16_loop
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SUBV $8, R4
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SUBV $8, R6
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SUBV $8, R7
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byte_loop:
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BEQ R6, R12, samebytes
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MOVBU (R6), R8
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BEQ R4, R12, samebytes
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MOVBU (R4), R8
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ADDVU $1, R4
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MOVBU (R6), R9
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ADDVU $1, R6
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MOVBU (R7), R9
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ADDVU $1, R7
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BEQ R8, R9, byte_loop
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byte_cmp:
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SGTU R8, R9, R12 // R12 = 1 if (R8 > R9)
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BNE R0, R12, ret
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MOVV $-1, R12
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SGTU R8, R9, R4 // R12 = 1 if (R8 > R9)
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BNE R0, R4, ret
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MOVV $-1, R4
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JMP ret
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samebytes:
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SGTU R4, R5, R8
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SGTU R5, R4, R9
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SUBV R9, R8, R12
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SGTU R5, R7, R8
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SGTU R7, R5, R9
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SUBV R9, R8, R4
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ret:
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MOVV R12, (R13)
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#ifndef GOEXPERIMENT_regabiargs
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MOVV R4, (R13)
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#endif
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RET
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@ -8,17 +8,21 @@
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#define REGCTXT R29
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// memequal(a, b unsafe.Pointer, size uintptr) bool
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TEXT runtime·memequal(SB),NOSPLIT|NOFRAME,$0-25
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TEXT runtime·memequal<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-25
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#ifndef GOEXPERIMENT_regabiargs
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MOVV a+0(FP), R4
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MOVV b+8(FP), R5
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BEQ R4, R5, eq
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MOVV size+16(FP), R6
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#endif
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BEQ R4, R5, eq
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ADDV R4, R6, R7
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PCALIGN $16
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loop:
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BNE R4, R7, test
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MOVV $1, R4
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R4, ret+24(FP)
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#endif
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RET
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test:
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MOVBU (R4), R9
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@ -27,17 +31,24 @@ test:
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ADDV $1, R5
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BEQ R9, R10, loop
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MOVB R0, R4
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R0, ret+24(FP)
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#endif
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RET
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eq:
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MOVV $1, R4
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R4, ret+24(FP)
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#endif
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RET
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// memequal_varlen(a, b unsafe.Pointer) bool
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TEXT runtime·memequal_varlen(SB),NOSPLIT,$40-17
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TEXT runtime·memequal_varlen<ABIInternal>(SB),NOSPLIT,$40-17
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#ifndef GOEXPERIMENT_regabiargs
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MOVV a+0(FP), R4
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MOVV b+8(FP), R5
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#endif
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BEQ R4, R5, eq
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MOVV 8(REGCTXT), R6 // compiler stores size at offset 8 in the closure
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MOVV R4, 8(R3)
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@ -45,9 +56,13 @@ TEXT runtime·memequal_varlen(SB),NOSPLIT,$40-17
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MOVV R6, 24(R3)
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JAL runtime·memequal(SB)
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MOVBU 32(R3), R4
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R4, ret+16(FP)
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#endif
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RET
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eq:
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MOVV $1, R4
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R4, ret+16(FP)
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#endif
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RET
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@ -5,11 +5,18 @@
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#include "go_asm.h"
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#include "textflag.h"
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TEXT ·IndexByte(SB),NOSPLIT,$0-40
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TEXT ·IndexByte<ABIInternal>(SB),NOSPLIT,$0-40
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#ifndef GOEXPERIMENT_regabiargs
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MOVV b_base+0(FP), R4
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MOVV b_len+8(FP), R5
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MOVBU c+24(FP), R6 // byte to find
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MOVV R4, R7 // store base for later
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MOVBU c+24(FP), R7 // byte to find
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#endif
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// R4 = b_base
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// R5 = b_len
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// R6 = b_cap (unused)
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// R7 = byte to find
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AND $0xff, R7
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MOVV R4, R6 // store base for later
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ADDV R4, R5 // end
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ADDV $-1, R4
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@ -18,21 +25,30 @@ loop:
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ADDV $1, R4
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BEQ R4, R5, notfound
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MOVBU (R4), R8
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BNE R6, R8, loop
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BNE R7, R8, loop
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SUBV R7, R4 // remove base
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SUBV R6, R4 // remove base
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#ifndef GOEXPERIMENT_regabiargs
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MOVV R4, ret+32(FP)
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#endif
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RET
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notfound:
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MOVV $-1, R4
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#ifndef GOEXPERIMENT_regabiargs
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MOVV R4, ret+32(FP)
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#endif
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RET
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TEXT ·IndexByteString(SB),NOSPLIT,$0-32
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TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT,$0-32
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#ifndef GOEXPERIMENT_regabiargs
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MOVV s_base+0(FP), R4
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MOVV s_len+8(FP), R5
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MOVBU c+16(FP), R6 // byte to find
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#endif
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// R4 = s_base
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// R5 = s_len
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// R6 = byte to find
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MOVV R4, R7 // store base for later
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ADDV R4, R5 // end
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ADDV $-1, R4
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@ -45,10 +61,14 @@ loop:
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BNE R6, R8, loop
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SUBV R7, R4 // remove base
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#ifndef GOEXPERIMENT_regabiargs
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MOVV R4, ret+24(FP)
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#endif
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RET
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notfound:
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MOVV $-1, R4
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#ifndef GOEXPERIMENT_regabiargs
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MOVV R4, ret+24(FP)
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#endif
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RET
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