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Merge pull request #643 from ThePortlandGroup/nv_stage
Pull 2018-12-19T17-19 Recent NVIDIA Changes
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,135 @@ | ||
| /* | ||
| * Copyright (c) 2018, NVIDIA CORPORATION. All rights reserved. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| */ | ||
|
|
||
| #include <stdint.h> | ||
| #include "pgcpuid.h" | ||
|
|
||
| /* | ||
| * Note: | ||
| * 1) these functions cannot call any other function | ||
| * 2) these functions can only use GPR (not floating point) | ||
| * | ||
| */ | ||
|
|
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| /** @brief returns false/true if CPUID supports eax function. | ||
| * __pgi_cpuid_getma (uint32_t cpuid_func) | ||
| * @param cpuid_func (I1) function to execute CPUID with | ||
| * | ||
| * Returns false(0)/true(1) | ||
| * | ||
| */ | ||
|
|
||
| int | ||
| __pgi_cpuid_getmax(uint32_t f) | ||
| { | ||
| uint32_t maxcpueax; | ||
| uint32_t fin = f & 0x80000000; | ||
| asm("\tcpuid" | ||
| : "=a"(maxcpueax) | ||
| : "0"(fin) | ||
| : "ebx", "ecx", "edx" | ||
| ); | ||
| return f <= maxcpueax; | ||
| } | ||
|
|
||
| /** @brief returns results of executing CPUID with function cpuid_func and | ||
| * sub function ecx. | ||
| * __pgi_cpuid_ecx(uint32_t cpuid_func, uint32_t *res, uint32_t ecx) | ||
| * @param cpuid_func (I1) function to execute CPUID with | ||
| * @param res (I2) pointer to buffer to store eax, ebx, ecx, edx | ||
| * @param ecx (I3) value of %ecx to execute CPUID with | ||
| * | ||
| * Returns false(0): if cpuid_func not supported | ||
| * true(1): CPUID successfully executed with cpuid_func+ecx and: | ||
| * res[0]=%eax, res[1]=%ebx, res[2]=%ecx, res[3]=%edx | ||
| * | ||
| */ | ||
|
|
||
| int | ||
| __pgi_cpuid_ecx(uint32_t f, uint32_t *r, uint32_t c) | ||
| { | ||
| if (__pgi_cpuid_getmax(f) == 0) return 0; | ||
| asm("\tcpuid" | ||
| : "=a"(r[0]), "=b"(r[1]), "=c"(r[2]), "=d"(r[3]) | ||
| : "0"(f), "2"(c) | ||
| : | ||
| ); | ||
| return 1; | ||
| } | ||
|
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||
|
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| /** @brief returns results of executing CPUID with function cpuid_func. | ||
| * __pgi_cpuid(uint32_t cpuid_func, uint32_t *res) | ||
| * @param cpuid_func (I1) function to execute CPUID with | ||
| * @param res (I2) pointer to buffer to store eax, ebx, ecx, edx | ||
| * | ||
| * Returns false(0): if cpuid_func not supported | ||
| * true(1): CPUID successfully executed with cpuid_func and: | ||
| * res[0]=%eax, res[1]=%ebx, res[2]=%ecx, res[3]=%edx | ||
| * | ||
| */ | ||
|
|
||
| int | ||
| __pgi_cpuid(uint32_t f, uint32_t *r) | ||
| { | ||
| return __pgi_cpuid_ecx(f, r, 0); | ||
| } | ||
|
|
||
| /** @brief returns results of executing CPUID with function cpuid_func. | ||
| * __pgcpuid(uint32_t cpuid_func, uint32_t *res) | ||
| * @param cpuid_func (I1) function to execute CPUID with | ||
| * @param res (I2) pointer to buffer to store eax, ebx, ecx, edx | ||
| * | ||
| * Returns false(0): if cpuid_func not supported | ||
| * true(1): CPUID successfully executed with cpuid_func and: | ||
| * res[0]=%eax, res[1]=%ebx, res[2]=%ecx, res[3]=%edx | ||
| * | ||
| */ | ||
|
|
||
| int | ||
| __pgcpuid(uint32_t f, uint32_t *r) | ||
| { | ||
| return __pgi_cpuid_ecx(f, r, 0); | ||
| } | ||
|
|
||
| /** @brief read extended control register. | ||
| * __pgi_getbv(uint32_t xcr_num, uint64_t *xcr_res) | ||
| * @param xcr_num (I1) extended control register number to read | ||
| * @param xcr_res (I2) pointer to buffer to store xcr[xcr_num] | ||
| * | ||
| * Returns true(1) with: | ||
| * xcr_res[31: 0]=%eax | ||
| * xcr_res[63:32]=%edx | ||
| * | ||
| */ | ||
| int | ||
| __pgi_getbv(uint32_t f, uint64_t *r) | ||
| { | ||
| uint32_t *u32; | ||
| u32 = (uint32_t *)r; | ||
| asm( | ||
| #if defined(__WIN64) | ||
| "\t.byte\t0x0f, 0x01, 0xd0" | ||
| #else | ||
| "\txgetbv" | ||
| #endif | ||
| : "=a"(u32[0]), "=d"(u32[1]) | ||
| : "c"(f) | ||
| : | ||
| ); | ||
| return 1; | ||
| } |
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