f295bde84c
Currently `avo` uses `BP` as a standard general-purpose register. However, `BP` is used for the frame pointer and should be callee-save. Under some circumstances, the Go assembler will do this automatically, but not always. At the moment `avo` can produce code that clobbers the `BP` register. Since Go 1.16 this code will also fail a new `go vet` check. This PR provides a (currently sub-optimal) fix for the issue. It introduces an `EnsureBasePointerCalleeSaved` pass which will check if the base pointer is written to by a function, and if so will artificially ensure that the function has a non-zero frame size. This will trigger the Go assembler to automatically save and restore the BP register. In addition, we update the `asmdecl` tool to `asmvet`, which includes the `framepointer` vet check. Updates #156
147 lines
3.1 KiB
ArmAsm
147 lines
3.1 KiB
ArmAsm
// Code generated by command: go run asm.go -out upper32.s -stubs stub.go. DO NOT EDIT.
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#include "textflag.h"
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// func Upper32() uint64
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TEXT ·Upper32(SB), NOSPLIT, $8-8
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// Initialize sum.
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XORQ AX, AX
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// Initialize registers.
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MOVQ $0x9e77d78aacb8cbcc, CX
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MOVQ $0x9e77d78aacb8cbcc, DX
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MOVQ $0x9e77d78aacb8cbcc, BX
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MOVQ $0x9e77d78aacb8cbcc, BP
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MOVQ $0x9e77d78aacb8cbcc, SI
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MOVQ $0x9e77d78aacb8cbcc, DI
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MOVQ $0x9e77d78aacb8cbcc, R8
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MOVQ $0x9e77d78aacb8cbcc, R9
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MOVQ $0x9e77d78aacb8cbcc, R10
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MOVQ $0x9e77d78aacb8cbcc, R11
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MOVQ $0x9e77d78aacb8cbcc, R12
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MOVQ $0x9e77d78aacb8cbcc, R13
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MOVQ $0x9e77d78aacb8cbcc, R14
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MOVQ $0x9e77d78aacb8cbcc, R15
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MOVQ $0x9e77d78aacb8cbcc, CX
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MOVQ $0x9e77d78aacb8cbcc, DX
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MOVQ $0x9e77d78aacb8cbcc, BX
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MOVQ $0x9e77d78aacb8cbcc, BP
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MOVQ $0x9e77d78aacb8cbcc, SI
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MOVQ $0x9e77d78aacb8cbcc, DI
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MOVQ $0x9e77d78aacb8cbcc, R8
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MOVQ $0x9e77d78aacb8cbcc, R9
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MOVQ $0x9e77d78aacb8cbcc, R10
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MOVQ $0x9e77d78aacb8cbcc, R11
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MOVQ $0x9e77d78aacb8cbcc, R12
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MOVQ $0x9e77d78aacb8cbcc, R13
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MOVQ $0x9e77d78aacb8cbcc, R14
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MOVQ $0x9e77d78aacb8cbcc, R15
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MOVQ $0x9e77d78aacb8cbcc, CX
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MOVQ $0x9e77d78aacb8cbcc, DX
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MOVQ $0x9e77d78aacb8cbcc, BX
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MOVQ $0x9e77d78aacb8cbcc, BP
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MOVQ $0x9e77d78aacb8cbcc, SI
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MOVQ $0x9e77d78aacb8cbcc, DI
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MOVQ $0x9e77d78aacb8cbcc, R8
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MOVQ $0x9e77d78aacb8cbcc, R9
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MOVQ $0x9e77d78aacb8cbcc, R10
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MOVQ $0x9e77d78aacb8cbcc, R11
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MOVQ $0x9e77d78aacb8cbcc, R12
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MOVQ $0x9e77d78aacb8cbcc, R13
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MOVQ $0x9e77d78aacb8cbcc, R14
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MOVQ $0x9e77d78aacb8cbcc, R15
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// Iteration 1.
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MOVL $0x00000001, CX
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MOVL $0x00000002, DX
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MOVL $0x00000003, BX
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MOVL $0x00000004, BP
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MOVL $0x00000005, SI
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MOVL $0x00000006, DI
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MOVL $0x00000007, R8
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MOVL $0x00000008, R9
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MOVL $0x00000009, R10
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MOVL $0x0000000a, R11
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MOVL $0x0000000b, R12
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MOVL $0x0000000c, R13
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MOVL $0x0000000d, R14
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MOVL $0x0000000e, R15
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ADDQ CX, AX
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ADDQ DX, AX
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ADDQ BX, AX
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ADDQ BP, AX
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ADDQ SI, AX
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ADDQ DI, AX
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ADDQ R8, AX
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ADDQ R9, AX
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ADDQ R10, AX
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ADDQ R11, AX
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ADDQ R12, AX
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ADDQ R13, AX
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ADDQ R14, AX
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ADDQ R15, AX
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// Iteration 2.
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MOVL $0x0000000f, CX
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MOVL $0x00000010, DX
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MOVL $0x00000011, BX
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MOVL $0x00000012, BP
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MOVL $0x00000013, SI
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MOVL $0x00000014, DI
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MOVL $0x00000015, R8
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MOVL $0x00000016, R9
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MOVL $0x00000017, R10
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MOVL $0x00000018, R11
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MOVL $0x00000019, R12
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MOVL $0x0000001a, R13
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MOVL $0x0000001b, R14
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MOVL $0x0000001c, R15
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ADDQ CX, AX
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ADDQ DX, AX
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ADDQ BX, AX
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ADDQ BP, AX
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ADDQ SI, AX
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ADDQ DI, AX
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ADDQ R8, AX
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ADDQ R9, AX
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ADDQ R10, AX
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ADDQ R11, AX
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ADDQ R12, AX
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ADDQ R13, AX
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ADDQ R14, AX
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ADDQ R15, AX
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// Iteration 3.
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MOVL $0x0000001d, CX
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MOVL $0x0000001e, DX
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MOVL $0x0000001f, BX
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MOVL $0x00000020, BP
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MOVL $0x00000021, SI
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MOVL $0x00000022, DI
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MOVL $0x00000023, R8
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MOVL $0x00000024, R9
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MOVL $0x00000025, R10
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MOVL $0x00000026, R11
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MOVL $0x00000027, R12
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MOVL $0x00000028, R13
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MOVL $0x00000029, R14
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MOVL $0x0000002a, R15
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ADDQ CX, AX
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ADDQ DX, AX
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ADDQ BX, AX
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ADDQ BP, AX
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ADDQ SI, AX
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ADDQ DI, AX
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ADDQ R8, AX
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ADDQ R9, AX
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ADDQ R10, AX
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ADDQ R11, AX
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ADDQ R12, AX
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ADDQ R13, AX
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ADDQ R14, AX
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ADDQ R15, AX
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// Store result and return.
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MOVQ AX, ret+0(FP)
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RET
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