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https://github.com/golang/go
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internal/bytealg: port bytealg functions to reg ABI on ppc64x
This adds support for the reg ABI to the bytes functions for ppc64/ppc64le. These are initially under control of the GOEXPERIMENT macro until all changes are in. Change-Id: Id82f31056af8caa8541e27c6735f6b815a5dbf5a Reviewed-on: https://go-review.googlesource.com/c/go/+/351190 Trust: Lynn Boger <laboger@linux.vnet.ibm.com> Reviewed-by: Cherry Mui <cherryyz@google.com>
This commit is contained in:
Lynn Boger
parent
daec057602
commit
b8a601756a
3 changed files with 95 additions and 20 deletions
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@ -8,64 +8,99 @@
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#include "go_asm.h"
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#include "textflag.h"
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TEXT ·Compare(SB),NOSPLIT|NOFRAME,$0-56
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TEXT ·Compare<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-56
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#ifdef GOEXPERIMENT_regabiargs
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// incoming:
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// R3 a addr -> R5
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// R4 a len -> R3
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// R5 a cap unused
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// R6 b addr -> R6
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// R7 b len -> R4
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// R8 b cap unused
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MOVD R3, R5
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MOVD R4, R3
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MOVD R7, R4
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#else
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MOVD a_base+0(FP), R5
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MOVD b_base+24(FP), R6
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MOVD a_len+8(FP), R3
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CMP R5,R6,CR7
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MOVD b_len+32(FP), R4
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MOVD $ret+48(FP), R7
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#endif
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CMP R5,R6,CR7
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CMP R3,R4,CR6
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BEQ CR7,equal
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#ifdef GOARCH_ppc64le
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BR cmpbodyLE<>(SB)
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#else
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BR cmpbodyBE<>(SB)
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#endif
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equal:
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BEQ CR6,done
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MOVD $1, R8
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BGT CR6,greater
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NEG R8
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greater:
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#ifdef GOEXPERIMENT_regabiargs
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MOVD R8, R3
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#else
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MOVD R8, (R7)
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#endif
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RET
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done:
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#ifdef GOEXPERIMENT_regabiargs
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MOVD $0, R3
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#else
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MOVD $0, (R7)
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#endif
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RET
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TEXT runtime·cmpstring(SB),NOSPLIT|NOFRAME,$0-40
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TEXT runtime·cmpstring<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-40
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#ifdef GOEXPERIMENT_regabiargs
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// incoming:
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// R3 a addr -> R5
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// R4 a len -> R3
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// R5 b addr -> R6
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// R6 b len -> R4
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MOVD R6, R7
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MOVD R5, R6
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MOVD R3, R5
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MOVD R4, R3
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MOVD R7, R4
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#else
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MOVD a_base+0(FP), R5
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MOVD b_base+16(FP), R6
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MOVD a_len+8(FP), R3
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CMP R5,R6,CR7
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MOVD b_len+24(FP), R4
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MOVD $ret+32(FP), R7
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#endif
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CMP R5,R6,CR7
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CMP R3,R4,CR6
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BEQ CR7,equal
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#ifdef GOARCH_ppc64le
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BR cmpbodyLE<>(SB)
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#else
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BR cmpbodyBE<>(SB)
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#endif
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equal:
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BEQ CR6,done
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MOVD $1, R8
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BGT CR6,greater
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NEG R8
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greater:
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#ifdef GOEXPERIMENT_regabiargs
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MOVD R8, R3
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#else
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MOVD R8, (R7)
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#endif
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RET
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done:
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#ifdef GOEXPERIMENT_regabiargs
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MOVD $0, R3
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#else
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MOVD $0, (R7)
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#endif
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RET
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// Do an efficient memcmp for ppc64le
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@ -73,7 +108,7 @@ done:
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// R4 = b len
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// R5 = a addr
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// R6 = b addr
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// R7 = addr of return value
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// R7 = addr of return value if not regabi
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TEXT cmpbodyLE<>(SB),NOSPLIT|NOFRAME,$0-0
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MOVD R3,R8 // set up length
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CMP R3,R4,CR2 // unequal?
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@ -168,14 +203,22 @@ cmpne: // only here is not equal
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BGT greater // here only if NE
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less:
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MOVD $-1,R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R3,(R7) // return value if A < B
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#endif
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RET
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equal:
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#ifdef GOEXPERIMENT_regabiargs
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MOVD $0, R3
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#else
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MOVD $0,(R7) // return value if A == B
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#endif
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RET
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greater:
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MOVD $1,R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R3,(R7) // return value if A > B
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#endif
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RET
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// Do an efficient memcmp for ppc64 (BE)
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@ -267,12 +310,20 @@ simple:
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BC 12,9,greater // 2nd len > 1st len
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less:
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MOVD $-1,R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R3,(R7) // return value if A < B
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#endif
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RET
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equal:
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#ifdef GOEXPERIMENT_regabiargs
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MOVD $0, R3
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#else
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MOVD $0,(R7) // return value if A == B
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#endif
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RET
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greater:
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MOVD $1,R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R3,(R7) // return value if A > B
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#endif
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RET
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@ -9,33 +9,38 @@
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#include "textflag.h"
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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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MOVD a+0(FP), R3
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MOVD b+8(FP), R4
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MOVD size+16(FP), R5
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MOVD $ret+24(FP), R10
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#endif
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BR memeqbody<>(SB)
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// memequal_varlen(a, b unsafe.Pointer) bool
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TEXT runtime·memequal_varlen(SB),NOSPLIT|NOFRAME,$0-17
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TEXT runtime·memequal_varlen<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-17
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#ifndef GOEXPERIMENT_regabiargs
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MOVD a+0(FP), R3
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MOVD b+8(FP), R4
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MOVD $ret+16(FP), R10
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#endif
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CMP R3, R4
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BEQ eq
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MOVD 8(R11), R5 // compiler stores size at offset 8 in the closure
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MOVD $ret+16(FP), R10
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BR memeqbody<>(SB)
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eq:
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MOVD $1, R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R3, ret+16(FP)
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#endif
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RET
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// Do an efficient memequal for ppc64
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// R3 = s1
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// R4 = s2
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// R5 = len
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// R10 = addr of return value (byte)
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// R10 = addr of return value (byte) when not regabi
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TEXT memeqbody<>(SB),NOSPLIT|NOFRAME,$0-0
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MOVD R5,CTR
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CMP R5,$8 // only optimize >=8
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@ -94,10 +99,16 @@ simple:
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BNE noteq
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BR equal
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noteq:
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#ifdef GOEXPERIMENT_regabiargs
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MOVD $0, R3
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#else
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MOVB $0, (R10)
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#endif
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RET
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equal:
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MOVD $1, R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVB R3, (R10)
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#endif
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RET
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@ -8,20 +8,29 @@
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#include "go_asm.h"
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#include "textflag.h"
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TEXT ·IndexByte(SB),NOSPLIT|NOFRAME,$0-40
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TEXT ·IndexByte<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-40
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#ifndef GOEXPERIMENT_regabiargs
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MOVD b_base+0(FP), R3 // R3 = byte array pointer
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MOVD b_len+8(FP), R4 // R4 = length
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MOVBZ c+24(FP), R5 // R5 = byte
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MOVD $ret+32(FP), R14 // R14 = &ret
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#else
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MOVD R6, R5
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#endif
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BR indexbytebody<>(SB)
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TEXT ·IndexByteString(SB),NOSPLIT|NOFRAME,$0-32
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TEXT ·IndexByteString<ABIInternal>(SB),NOSPLIT|NOFRAME,$0-32
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#ifndef GOEXPERIMENT_regabiargs
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MOVD s_base+0(FP), R3 // R3 = string
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MOVD s_len+8(FP), R4 // R4 = length
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MOVBZ c+16(FP), R5 // R5 = byte
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MOVD $ret+24(FP), R14 // R14 = &ret
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#endif
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BR indexbytebody<>(SB)
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// R3 = addr of string
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// R4 = len of string
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// R5 = byte to find
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// R14 = addr of return value when not regabi
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TEXT indexbytebody<>(SB),NOSPLIT|NOFRAME,$0-0
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MOVD R3,R17 // Save base address for calculating the index later.
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RLDICR $0,R3,$60,R8 // Align address to doubleword boundary in R8.
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@ -186,7 +195,9 @@ tail:
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notfound:
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MOVD $-1,R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R3,(R14)
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#endif
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RET
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found:
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@ -229,7 +240,9 @@ found:
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return:
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SUB R17,R3
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#ifndef GOEXPERIMENT_regabiargs
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MOVD R3,(R14)
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#endif
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RET
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found_qw_align:
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