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bifrost: Document d3d/gl comparison control bit 

Signed-off-by: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6079>
This commit is contained in:
Chris Forbes 2020-07-26 10:33:06 -07:00 committed by Marge Bot
parent ec37c7126d
commit 1a168c90a0
1 changed files with 5 additions and 3 deletions
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8
src/panfrost/bifrost/bifrost.h
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@ -447,6 +447,7 @@ enum bifrost_fcmp_cond {
BIFROST_OLE = 5,
};
/* "gl" version produces 0/1. "d3d" version produces 0/~0 */
#define BIFROST_FMA_OP_FCMP_GL (0x48000 >> 13)
#define BIFROST_FMA_OP_FCMP_D3D (0x4c000 >> 13)
@ -473,6 +474,7 @@ struct bifrost_add_fcmp {
unsigned op : 6;
} __attribute__((packed));
/* "gl" version produces 0/1. "d3d" version produces 0/~0 */
#define BIFROST_FMA_OP_FCMP_GL_16 (0xc8000 >> 13)
#define BIFROST_FMA_OP_FCMP_D3D_16 (0xcc000 >> 13)
@ -521,7 +523,7 @@ struct bifrost_fma_icmp32 {
unsigned src1 : 3;
enum bifrost_icmp_cond cond : 3;
unsigned unk1 : 1; /* set */
unsigned d3d : 1;
unsigned d3d : 1; /* if set, true is ~0. otherwise, true is 1 */
unsigned op : 12;
} __attribute__((packed));
@ -541,7 +543,7 @@ struct bifrost_add_icmp {
unsigned src1 : 3;
enum bifrost_icmp_cond cond : 3;
unsigned sz : 1; /* 1 for 32, 0 for 8 */
unsigned d3d : 1;
unsigned d3d : 1; /* if set, true is ~0. otherwise, true is 1 */
unsigned op : 9;
} __attribute__((packed));
@ -550,7 +552,7 @@ struct bifrost_add_icmp16 {
unsigned src1 : 3;
unsigned src0_swizzle : 2;
unsigned src1_swizzle : 2;
unsigned d3d : 1;
unsigned d3d : 1; /* if set, true is ~0. otherwise, true is 1 */
enum bifrost_icmp_cond cond : 3;
unsigned op : 6;
} __attribute__((packed));