Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 1 | ; |
| 2 | ; jsimdcpu.asm - SIMD instruction support check |
| 3 | ; |
| 4 | ; Copyright 2009 Pierre Ossman <ossman@cendio.se> for Cendio AB |
| 5 | ; |
| 6 | ; Based on |
| 7 | ; x86 SIMD extension for IJG JPEG library |
| 8 | ; Copyright (C) 1999-2006, MIYASAKA Masaru. |
| 9 | ; For conditions of distribution and use, see copyright notice in jsimdext.inc |
| 10 | ; |
| 11 | ; This file should be assembled with NASM (Netwide Assembler), |
| 12 | ; can *not* be assembled with Microsoft's MASM or any compatible |
| 13 | ; assembler (including Borland's Turbo Assembler). |
| 14 | ; NASM is available from http://nasm.sourceforge.net/ or |
| 15 | ; http://sourceforge.net/project/showfiles.php?group_id=6208 |
| 16 | ; |
| 17 | ; [TAB8] |
| 18 | |
Pierre Ossman | 3a65ef4 | 2009-03-16 13:34:18 +0000 | [diff] [blame] | 19 | %include "jsimdext.inc" |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 20 | |
| 21 | ; -------------------------------------------------------------------------- |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 22 | SECTION SEG_TEXT |
| 23 | BITS 32 |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 24 | ; |
| 25 | ; Check if the CPU supports SIMD instructions |
| 26 | ; |
| 27 | ; GLOBAL(unsigned int) |
| 28 | ; jpeg_simd_cpu_support (void) |
| 29 | ; |
| 30 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 31 | align 16 |
| 32 | global EXTN(jpeg_simd_cpu_support) |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 33 | |
| 34 | EXTN(jpeg_simd_cpu_support): |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 35 | push ebx |
| 36 | ; push ecx ; need not be preserved |
| 37 | ; push edx ; need not be preserved |
| 38 | ; push esi ; unused |
| 39 | push edi |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 40 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 41 | xor edi,edi ; simd support flag |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 42 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 43 | pushfd |
| 44 | pop eax |
| 45 | mov edx,eax |
| 46 | xor eax, 1<<21 ; flip ID bit in EFLAGS |
| 47 | push eax |
| 48 | popfd |
| 49 | pushfd |
| 50 | pop eax |
| 51 | xor eax,edx |
| 52 | jz short .return ; CPUID is not supported |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 53 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 54 | ; Check for MMX instruction support |
| 55 | xor eax,eax |
| 56 | cpuid |
| 57 | test eax,eax |
| 58 | jz short .return |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 59 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 60 | xor eax,eax |
| 61 | inc eax |
| 62 | cpuid |
| 63 | mov eax,edx ; eax = Standard feature flags |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 64 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 65 | test eax, 1<<23 ; bit23:MMX |
| 66 | jz short .no_mmx |
| 67 | or edi, byte JSIMD_MMX |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 68 | .no_mmx: |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 69 | test eax, 1<<25 ; bit25:SSE |
| 70 | jz short .no_sse |
| 71 | or edi, byte JSIMD_SSE |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 72 | .no_sse: |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 73 | test eax, 1<<26 ; bit26:SSE2 |
| 74 | jz short .no_sse2 |
| 75 | or edi, byte JSIMD_SSE2 |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 76 | .no_sse2: |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 77 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 78 | ; Check for 3DNow! instruction support |
| 79 | mov eax, 0x80000000 |
| 80 | cpuid |
| 81 | cmp eax, 0x80000000 |
| 82 | jbe short .return |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 83 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 84 | mov eax, 0x80000001 |
| 85 | cpuid |
| 86 | mov eax,edx ; eax = Extended feature flags |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 87 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 88 | test eax, 1<<31 ; bit31:3DNow!(vendor independent) |
| 89 | jz short .no_3dnow |
| 90 | or edi, byte JSIMD_3DNOW |
MIYASAKA Masaru | a2e6a9d | 2006-02-04 00:00:00 +0000 | [diff] [blame] | 91 | .no_3dnow: |
| 92 | |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 93 | .return: |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 94 | mov eax,edi |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 95 | |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 96 | pop edi |
| 97 | ; pop esi ; unused |
| 98 | ; pop edx ; need not be preserved |
| 99 | ; pop ecx ; need not be preserved |
| 100 | pop ebx |
| 101 | ret |
Pierre Ossman | 2ae181c | 2009-03-09 13:21:27 +0000 | [diff] [blame] | 102 | |
DRC | 132b5fd | 2009-10-08 09:04:56 +0000 | [diff] [blame] | 103 | ; For some reason, the OS X linker does not honor the request to align the |
| 104 | ; segment unless we do this. |
DRC | e5eaf37 | 2014-05-09 18:00:32 +0000 | [diff] [blame] | 105 | align 16 |