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x86: Detect BMI2 instruction support.

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This commit is contained in:
Mike Pall 2016-03-28 23:04:33 +02:00
parent c24c8e5312
commit 6801e7165c
4 changed files with 10 additions and 1 deletions
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5
src/lib_jit.c
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@ -668,6 +668,11 @@ static uint32_t jit_cpudetect(lua_State *L)
if (fam >= 0x00000f00) /* K8, K10. */ if (fam >= 0x00000f00) /* K8, K10. */
flags |= JIT_F_PREFER_IMUL; flags |= JIT_F_PREFER_IMUL;
} }
if (vendor[0] >= 7) {
uint32_t xfeatures[4];
lj_vm_cpuid(7, xfeatures);
flags |= ((xfeatures[1] >> 8)&1) * JIT_F_BMI2;
}
#endif #endif
} }
/* Check for required instruction set support on x86 (unnecessary on x64). */ /* Check for required instruction set support on x86 (unnecessary on x64). */

3
src/lj_jit.h
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@ -19,10 +19,11 @@
#define JIT_F_SSE4_1 0x00000040 #define JIT_F_SSE4_1 0x00000040
#define JIT_F_PREFER_IMUL 0x00000080 #define JIT_F_PREFER_IMUL 0x00000080
#define JIT_F_LEA_AGU 0x00000100 #define JIT_F_LEA_AGU 0x00000100
#define JIT_F_BMI2 0x00000200
/* Names for the CPU-specific flags. Must match the order above. */ /* Names for the CPU-specific flags. Must match the order above. */
#define JIT_F_CPU_FIRST JIT_F_SSE2 #define JIT_F_CPU_FIRST JIT_F_SSE2
#define JIT_F_CPUSTRING "\4SSE2\4SSE3\6SSE4.1\3AMD\4ATOM" #define JIT_F_CPUSTRING "\4SSE2\4SSE3\6SSE4.1\3AMD\4ATOM\4BMI2"
#elif LJ_TARGET_ARM #elif LJ_TARGET_ARM
#define JIT_F_ARMV6_ 0x00000010 #define JIT_F_ARMV6_ 0x00000010
#define JIT_F_ARMV6T2_ 0x00000020 #define JIT_F_ARMV6T2_ 0x00000020

1
src/vm_x64.dasc
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@ -2639,6 +2639,7 @@ static void build_subroutines(BuildCtx *ctx)
| mov eax, CARG1d | mov eax, CARG1d
| .if X64WIN; push rsi; mov rsi, CARG2; .endif | .if X64WIN; push rsi; mov rsi, CARG2; .endif
| push rbx | push rbx
| xor ecx, ecx
| cpuid | cpuid
| mov [rsi], eax | mov [rsi], eax
| mov [rsi+4], ebx | mov [rsi+4], ebx

2
src/vm_x86.dasc
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@ -3026,6 +3026,7 @@ static void build_subroutines(BuildCtx *ctx)
| mov eax, CARG1d | mov eax, CARG1d
| .if X64WIN; push rsi; mov rsi, CARG2; .endif | .if X64WIN; push rsi; mov rsi, CARG2; .endif
| push rbx | push rbx
| xor ecx, ecx
| cpuid | cpuid
| mov [rsi], eax | mov [rsi], eax
| mov [rsi+4], ebx | mov [rsi+4], ebx
@ -3049,6 +3050,7 @@ static void build_subroutines(BuildCtx *ctx)
| mov eax, [esp+4] // Argument 1 is function number. | mov eax, [esp+4] // Argument 1 is function number.
| push edi | push edi
| push ebx | push ebx
| xor ecx, ecx
| cpuid | cpuid
| mov edi, [esp+16] // Argument 2 is result area. | mov edi, [esp+16] // Argument 2 is result area.
| mov [edi], eax | mov [edi], eax