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gallivm: move ppc denorm disable to inline

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This just puts it out of the way

Reviewed-By: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29869>
This commit is contained in:
Dave Airlie 2024-06-21 12:13:42 +10:00
parent 17f2ebe8d2
commit 05dd12b9a5
2 changed files with 29 additions and 21 deletions
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22
src/gallium/auxiliary/gallivm/lp_bld_init.c
View file

@ -358,27 +358,7 @@ lp_build_init(void)
lp_set_target_options();
#if DETECT_ARCH_PPC_64
/* Set the NJ bit in VSCR to 0 so denormalized values are handled as
* specified by IEEE standard (PowerISA 2.06 - Section 6.3). This guarantees
* that some rounding and half-float to float handling does not round
* incorrectly to 0.
* XXX: should eventually follow same logic on all platforms.
* Right now denorms get explicitly disabled (but elsewhere) for x86,
* whereas ppc64 explicitly enables them...
*/
if (util_get_cpu_caps()->has_altivec) {
unsigned short mask[] = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
0xFFFF, 0xFFFF, 0xFFFE, 0xFFFF };
__asm (
"mfvscr %%v1\n"
"vand %0,%%v1,%0\n"
"mtvscr %0"
:
: "r" (*mask)
);
}
#endif
lp_bld_ppc_disable_denorms();
gallivm_initialized = true;

28
src/gallium/auxiliary/gallivm/lp_bld_init.h
View file

@ -32,6 +32,7 @@
#include "util/compiler.h"
#include "util/u_pointer.h" // for func_pointer
#include "util/u_cpu_detect.h"
#include "lp_bld.h"
#include "lp_bld_passmgr.h"
#include <llvm-c/ExecutionEngine.h>
@ -106,6 +107,33 @@ gallivm_jit_function(struct gallivm_state *gallivm,
unsigned gallivm_get_perf_flags(void);
void lp_init_clock_hook(struct gallivm_state *gallivm);
static inline void
lp_bld_ppc_disable_denorms(void)
{
#if DETECT_ARCH_PPC_64
/* Set the NJ bit in VSCR to 0 so denormalized values are handled as
* specified by IEEE standard (PowerISA 2.06 - Section 6.3). This guarantees
* that some rounding and half-float to float handling does not round
* incorrectly to 0.
* XXX: should eventually follow same logic on all platforms.
* Right now denorms get explicitly disabled (but elsewhere) for x86,
* whereas ppc64 explicitly enables them...
*/
if (util_get_cpu_caps()->has_altivec) {
unsigned short mask[] = { 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF,
0xFFFF, 0xFFFF, 0xFFFE, 0xFFFF };
__asm (
"mfvscr %%v1\n"
"vand %0,%%v1,%0\n"
"mtvscr %0"
:
: "r" (*mask)
);
}
#endif
}
#ifdef __cplusplus
}
#endif