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Type:
Bug
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Resolution: Unresolved
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Priority:
Low
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Code Generation Tools
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CODEGEN-14390
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default
The attached source file has the following on line 285.
aGlobalV[u8EEPwwww].dfdsf_u16o = (uint16)(((**ppu32RH)&0xFFFF0000U)>>16U);
Build on Windows and on Linux.
% armcl -@options.txt file.c
Compare the assembly code generated for line 285. Here it is from Windows.
;----------------------------------------------------------------------
; 285 | aGlobalV[u8EEPwwww].dfdsf_u16o = (uint16)(((**ppu32RH)&0xFFFF0000U)>>16
; | U);
;----------------------------------------------------------------------
LDR V9, [SP, #32] ; [DPU_V7R4_PIPE0] |285|
LDR V9, [V9, #0] ; [DPU_V7R4_PIPE0] |285|
LDRB A1, [SP, #51] ; [DPU_V7R4_PIPE0] |285|
LDR V9, [V9, #0] ; [DPU_V7R4_PIPE0] |285|
MOV A2, #212 ; [DPU_V7R4_PIPE1] |285|
LDR A3, $C$CON14 ; [DPU_V7R4_PIPE0] |285|
SMULBB A1, A2, A1 ; [DPU_V7R4_PIPE0] |285|
BFC V9, #0, #16 ; [DPU_V7R4_PIPE0] |285|
MOV V9, V9, LSR #16 ; [DPU_V7R4_PIPE0] |285|
STRH V9, [A3, +A1] ; [DPU_V7R4_PIPE0] |285|
Here it is from Linux.
;----------------------------------------------------------------------
; 285 | aGlobalV[u8EEPwwww].dfdsf_u16o = (uint16)(((**ppu32RH)&0xFFFF0000U)>>16
; | U);
;----------------------------------------------------------------------
LDR V9, [SP, #32] ; [DPU_V7R4_PIPE0] |285|
LDRB A1, [SP, #51] ; [DPU_V7R4_PIPE0] |285|
LDR V9, [V9, #0] ; [DPU_V7R4_PIPE0] |285|
LDR A2, $C$CON15 ; [DPU_V7R4_PIPE0] |285|
MOV A3, #212 ; [DPU_V7R4_PIPE1] |285|
LDR A4, $C$CON14 ; [DPU_V7R4_PIPE0] |285|
SMULBB A1, A3, A1 ; [DPU_V7R4_PIPE0] |285|
LDR V9, [V9, #0] ; [DPU_V7R4_PIPE0] |285|
AND V9, A2, V9 ; [DPU_V7R4_PIPE0] |285|
MOV V9, V9, LSR #16 ; [DPU_V7R4_PIPE0] |285|
STRH V9, [A4, +A1] ; [DPU_V7R4_PIPE0] |285|
The build uses no optimization. Add --opt_level=2, and the generated assembly is the same.
