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Add rdtscp to the dmd-style inline assembler. #3895

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Jan 11, 2022
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Add rdtscp to the dmd-style inline assembler. #3895

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9 changes: 9 additions & 0 deletions gen/asm-x86.h
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Original file line number Diff line number Diff line change
Expand Up @@ -395,6 +395,7 @@ typedef enum {
Op_0,
Op_0_AX,
Op_0_DXAX,
Op_0_DXCXAX,
Op_Loop,
Op_Flags,
Op_F0_ST,
Expand Down Expand Up @@ -650,6 +651,7 @@ static AsmOpInfo asmOpInfo[N_AsmOpInfo] = {
/* Op_0_AX */ {{0, 0, 0}, 0, Clb_SizeAX},
/* Op_0_DXAX */ {{0, 0, 0}, 0, Clb_SizeDXAX}, // but for cwd/cdq -- how
// do know the size..
/* Op_0_DXCXAX*/ {{0, 0, 0}, 0, Clb_SizeDXAX | Clb_CX},
/* Op_Loop */ {{imm, 0, 0}, 0, Clb_CX},
/* Op_Flags */ {{0, 0, 0}, 0, Clb_Flags},
/* Op_F0_ST */ {{0, 0, 0}, 0, Clb_ST},
Expand Down Expand Up @@ -1527,6 +1529,13 @@ static AsmOpEnt opData[] = {
{"rdpmc", Op_0_DXAX},
//{"rdrand", XXXX},
{"rdtsc", Op_0_DXAX},
/*
RDTSCP clobbers EDX:EAX and ECX
From the Intel manual:
EDX:EAX ← TimeStampCounter;
ECX ← IA32_TSC_AUX[31:0];
*/
{"rdtscp", Op_0_DXCXAX},
{"rep", Op_0},
{"repe", Op_0},
{"repne", Op_0},
Expand Down