aaron/ispc
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

use __nv_* libcalls for rcp/sqrt/rsqrt

Browse Source
This commit is contained in:
Evghenii
2014-02-21 10:36:46 +01:00
parent a745aaf91c
commit b60d77c154
1 changed files with 26 additions and 37 deletions
Download Patch File Download Diff File Expand all files Collapse all files

63
builtins/target-nvptx.ll
View File

@@ -678,46 +678,41 @@ minmax_vy(max, double, double)
;; sqrt/rsqrt/rcp
declare float @llvm.nvvm.rsqrt.approx.f(float %f) nounwind readonly alwaysinline
declare float @llvm.nvvm.sqrt.f(float %f) nounwind readonly alwaysinline
declare double @llvm.nvvm.rsqrt.approx.d(double %f) nounwind readonly alwaysinline
declare double @llvm.sqrt.f64(double %f) nounwind readonly alwaysinline
;; declare float @__rcp_uniform_float(float) nounwind readnone
define float @__rcp_uniform_float(float) nounwind readonly alwaysinline {
; uniform float iv = extract(__rcp_u(v), 0);
; return iv * (2. - v * iv);
%ret = fdiv float 1.,%0
; %ret = tail call float asm sideeffect "rcp.approx.ftz.f32 $0, $1;", "=f,f"(float %0) nounwind readnone alwaysinline
ret float %ret
}
;; declare float @__sqrt_uniform_float(float) nounwind readnone
define float @__sqrt_uniform_float(float) nounwind readonly alwaysinline {
%ret = call float @llvm.nvvm.sqrt.f(float %0)
; %ret = tail call float asm sideeffect "sqrt.approx.ftz.f32 $0, $1;", "=f,f"(float %0) nounwind readnone alwaysinline
ret float %ret
}
;; declare float @__rsqrt_uniform_float(float) nounwind readnone
define float @__rsqrt_uniform_float(float) nounwind readonly alwaysinline
{
%ret = call float @llvm.nvvm.rsqrt.approx.f(float %0)
; %ret = tail call float asm sideeffect "rsqrt.approx.ftz.f32 $0, $1;", "=f,f"(float %0) nounwind readnone alwaysinline
ret float %ret
}
define double @__rsqrt_uniform_double(double) nounwind readonly alwaysinline
{
%ret1 = call double @llvm.sqrt.f64(double %0)
%ret = fdiv double 1., %ret1
ret double %ret
}
declare double @__nv_drcp_rn(double)
define double @__rcp_uniform_double(double) nounwind readonly alwaysinline
{
%ret = fdiv double 1., %0
%ret = call double @__nv_drcp_rn(double %0)
ret double %ret
}
declare float @__nv_sqrtf(float)
define float @__sqrt_uniform_float(float) nounwind readonly alwaysinline
{
%ret = call float @__nv_sqrtf(float %0)
ret float %ret
}
declare double @__nv_sqrt(double)
define double @__sqrt_uniform_double(double) nounwind readonly alwaysinline {
%ret = call double @__nv_sqrt(double %0)
ret double %ret
}
declare float @__nv_rsqrtf(float)
define float @__rsqrt_uniform_float(float) nounwind readonly alwaysinline
{
%ret = call float @__nv_rsqrtf(float %0)
ret float %ret
}
declare double @__nv_rsqrt(double)
define double @__rsqrt_uniform_double(double) nounwind readonly alwaysinline
{
%ret = call double @__nv_rsqrt(double %0)
ret double %ret
}
;;;;;; varying
define <WIDTH x float> @__rcp_varying_float(<WIDTH x float>) nounwind readnone alwaysinline
{
%v = extractelement <1 x float> %0, i32 0
@@ -746,7 +741,6 @@ define <WIDTH x double> @__rsqrt_varying_double(<WIDTH x double>) nounwind readn
%rv = insertelement <1 x double> undef, double %r, i32 0
ret <WIDTH x double> %rv
}
define <WIDTH x float> @__sqrt_varying_float(<WIDTH x float>) nounwind readnone alwaysinline
{
%v = extractelement <1 x float> %0, i32 0
@@ -754,11 +748,6 @@ define <WIDTH x float> @__sqrt_varying_float(<WIDTH x float>) nounwind readnone
%rv = insertelement <1 x float> undef, float %r, i32 0
ret <WIDTH x float> %rv
}
;; declare double @__sqrt_uniform_double(double) nounwind readnone
define double @__sqrt_uniform_double(double) nounwind readonly alwaysinline {
%ret = call double @llvm.sqrt.f64(double %0)
ret double %ret
}
define <WIDTH x double> @__sqrt_varying_double(<WIDTH x double>) nounwind readnone alwaysinline
{
%v = extractelement <1 x double> %0, i32 0